CN102340272B - Motor drive and driving method thereof - Google Patents
Motor drive and driving method thereof Download PDFInfo
- Publication number
- CN102340272B CN102340272B CN201010233729.5A CN201010233729A CN102340272B CN 102340272 B CN102340272 B CN 102340272B CN 201010233729 A CN201010233729 A CN 201010233729A CN 102340272 B CN102340272 B CN 102340272B
- Authority
- CN
- China
- Prior art keywords
- signal
- induced signal
- digital signal
- cycle
- induced
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000004088 simulation Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001934 delay Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 101100162210 Aspergillus parasiticus (strain ATCC 56775 / NRRL 5862 / SRRC 143 / SU-1) aflM gene Proteins 0.000 description 1
- 101100102500 Caenorhabditis elegans ver-1 gene Proteins 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
Abstract
The invention relates to a kind of motor drive and driving method thereof.This motor driving method is applied to a motor drive, motor drive be with a motor and a magnetoelastic transducer with the use of, magnetoelastic transducer produces the first induced signal of an expression S pole position of magnetic pole according to motor operation, and the second induced signal that represents N pole position of magnetic pole, motor drive is according to the first induced signal and the running of the second induced signal CD-ROM drive motor, first this motor driving method is compare the first induced signal and the responsibility cycle between the second induced signal last cycle, to obtain both responsibility cycle gaps; Again according to this responsibility cycle gap, the responsibility cycle in compensate the first induced signal and the second induced signal wherein next cycle of responsibility cycle smaller, the noise produced when so can promote the operating efficiency of motor and reduce motor operation simultaneously.
Description
Technical field
The present invention relates to a kind of driving method, particularly relate to a kind of driving method being applied to motor drive.
Background technology
Consult Fig. 1 and Fig. 2, Fig. 1 is the circuit diagram of motor system 900 now, and this motor system 900 comprises motor 910, magnetoelastic transducer (such as: Hall element) 920 and a motor drive 930.Motor 910 is combinations of a rotor (permanent magnet) 911 and stator (coil groups) 912; Magnetoelastic transducer 920 in order to induction motor 910 in the running magnetic pole change and produce the first induced signal Vh1 of an expression S pole position of magnetic pole, and the second induced signal Vh2 that represents N pole position of magnetic pole, make motor drive 930 adjust the drive current Id of motor 910 according to the first induced signal Vh1 and the second induced signal Vh2.
Ideally, the responsibility cycle (duty cycle) of the first induced signal Vh1 and the second induced signal Vh2 should be all 50%, namely magnetoelastic transducer 920 respond to time of S pole and N pole should be identical, as shown in the Vh1 (idea1) of Fig. 2 and Vh2 (idea1).But in fact, the first induced signal Vh1 that magnetoelastic transducer 920 induces and the second induced signal Vh2 is that the time of high potential is not identical, as shown in Vh1 and Vh2 of Fig. 2, make both responsibility cycle of the corresponding drive singal (being the corresponding drive singal Vd produced of the first induced signal Vh1 in Fig. 2) produced unequal, therefore, mainly there is some reason following the position reflecting rotor 911 place that also cannot be correct:
1. the error owing to making, the S pole of rotor 911 and the shape of N pole not identical, make magnetoelastic transducer 920 for the magnetoelectricity reaction of S pole and N pole and unequal;
2. on rotor 911, the magnetism intensity (magnetic flux) of each magnetic pole is also not identical;
3. magnetoelastic transducer 920 can by external electromagnetic wave interference or magnetic interference (especially coil groups produce magnetic interference), and the induced signal making it respond to produces error; And
4. magnetoelastic transducer 920 make because of the relation of assembling its position relative to each magnetic pole on rotor 911 or placing direction not completely the same.
Motor 910 so will be caused cannot to reach higher efficiency in the running, and the drive current Id that produces according to unequal first induced signal Vh1 and the second induced signal Vh2 of motor drive 930 unbalanced, motor 910 can be made to produce in various degree and the electromagnetism of frequency involves noise.
Therefore, if unequal first induced signal Vh1 and the second induced signal Vh2 can compensate by motor drive 930, make motor 910 identical with the time of reverse rotation in the time rotated forward, so can improve the problem that above-mentioned prior art is encountered.
As can be seen here, above-mentioned existing motor drive and driving method thereof obviously still have inconvenience and defect, and are urgently further improved.In order to solve above-mentioned Problems existing, relevant manufactures there's no one who doesn't or isn't seeks solution painstakingly, but have no applicable design for a long time to be completed by development always, and common product and method do not have appropriate structure and method to solve the problem, this is obviously the anxious problem for solving of relevant dealer.Therefore how to found a kind of new motor drive and driving method, one of current important research and development problem of real genus, also becomes the target that current industry pole need be improved.
Summary of the invention
Main purpose of the present invention is, overcome the defect that existing motor driving method exists, and a kind of new motor driving method is provided, technical problem to be solved is the first induced signal Vh1 and the second induced signal Vh2 that its compensation electromagnetic converter is induced, make motor the time rotated forward identical with the time of reverse rotation (or close), noise when improving the operating efficiency of motor and reduce motor operation, is very suitable for practicality.
Another object of the present invention is to, overcome the defect that existing motor drive exists, and a kind of new motor drive is provided, technical problem to be solved be make itself and a motor and a magnetoelastic transducer with the use of, the the first induced signal Vh1 induced electromagnetic converter by comparing unit and compensating unit and the second induced signal Vh2 compensates, make motor the time rotated forward identical with the time of reverse rotation (or close),, noise when improving the operating efficiency of motor and reduce motor operation.
The object of the invention to solve the technical problems realizes by the following technical solutions.According to a kind of motor driving method that the present invention proposes, be applied to a motor drive, this motor drive be with a motor and a magnetoelastic transducer with the use of, this magnetoelastic transducer produces the first induced signal of an expression S pole position of magnetic pole according to this motor operation, and the second induced signal that represents N pole position of magnetic pole, this motor drive drives this motor operation according to this first induced signal and the second induced signal; Wherein said driving method comprises following steps: (A) compares this first induced signal and the responsibility cycle between this second induced signal last cycle, to obtain both responsibility cycle gaps; (B) according to this responsibility cycle gap, the responsibility cycle in compensate this first induced signal and this second induced signal wherein next cycle of responsibility cycle smaller.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid motor driving method, wherein said step (A) comprises following sub-step: this first induced signal and this second induced signal are converted to one first digital signal and one second digital signal of digital form by (A-1) respectively; (A-2) count for the responsibility cycle of this first digital signal and this second digital signal respectively, to produce one first count value and one second count value; And this first count value and this second count value are subtracted each other and are produced the count difference value of responsibility cycle gap between this first induced signal of an expression and this second induced signal by (A-3).
Aforesaid motor driving method, wherein said step (B) is the responsibility cycle according to this count difference value extend this first induced signal and this second induced signal wherein next cycle of responsibility cycle smaller.
Aforesaid motor driving method, in wherein said step (B), in this first induced signal and this second induced signal the responsibility cycle in next cycle of responsibility cycle smaller be extend this count difference value 1/N doubly, N be greater than zero integer.
Aforesaid motor driving method, wherein said step (A) is the crest difference being subtracted from one another the crest value of the crest value of this first induced signal and this second induced signal to produce responsibility cycle gap between this first induced signal of an expression and this second induced signal.
Aforesaid motor driving method, wherein said step (B) draws high the crest value of this first induced signal and this second induced signal wherein crest value smaller.
Aforesaid motor driving method, in wherein said step (B), the responsibility cycle in this first induced signal and this second induced signal wherein next cycle of responsibility cycle smaller be extend this crest difference 1/N doubly, the integer of N for being more than or equal to one.
The object of the invention to solve the technical problems also realizes by the following technical solutions.According to a kind of motor drive that the present invention proposes, be with a motor and a magnetoelastic transducer with the use of, this magnetoelastic transducer produces the first induced signal of an expression S pole position of magnetic pole according to this motor operation, and the second induced signal that represents N pole position of magnetic pole, wherein said motor drive comprises: a driver element, produces one first drive singal and one second drive singal to drive this motor operation according to this first induced signal and the second induced signal correspondence; One comparing unit, compares the responsibility cycle in the last cycle of this first induced signal and this second induced signal, to obtain both responsibility cycle gaps; And a compensating unit, according to the responsibility cycle in this responsibility cycle gap compensate this first induced signal and this second induced signal wherein next cycle of responsibility cycle smaller.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid motor drive, wherein said comparing unit comprises: one first change-over circuit, receive this first induced signal that this magnetoelastic transducer produces, and this first induced signal is converted to one first digital signal of digital form, one second change-over circuit, receive this second induced signal that this magnetoelastic transducer produces, and this second induced signal is converted to one second digital signal of digital form, one counting circuit, be coupled to this first change-over circuit and this second change-over circuit, and count for the responsibility cycle of this first digital signal and this second digital signal, to produce one first count value and one second count value, and a subtraction circuit, be coupled to this counting circuit, in order to this first count value and this second count value are subtracted each other and are produced the count difference value of this responsibility cycle gap of an expression.
Aforesaid motor drive, wherein said compensating unit is the responsibility cycle according to this count difference value extend this first digital signal and this second digital signal wherein next cycle of responsibility cycle smaller.
Aforesaid motor drive, wherein said compensating unit comprises: a phase adjusting module, be coupled to this subtraction circuit, it produces should one first compensating signal of count difference value and one second compensating signal according to this count difference value, one first or lock, this first or two inputs of lock be respectively coupled to this first change-over circuit and this phase adjusting module, and this first or the output of lock be coupled to this driver element, this first or lock export according to this first digital signal and this first compensating signal one to produce this first drive singal the first output signal for this driver element, and one second or lock, this second or two inputs of lock be respectively coupled to this change-over circuit and this phase adjusting module, and this second or the output of lock be coupled to this driver element, this second or lock export according to this second digital signal and this second compensating signal one to produce this second drive singal the second output signal for this driver element.
Aforesaid motor drive, when the responsibility cycle of the first wherein said digital signal is less than the responsibility cycle of this second digital signal, in single cycle, when this first digital signal is down to electronegative potential from high potential, this first compensating signal rises to high potential from electronegative potential, and this second compensating signal then maintains electronegative potential; When the responsibility cycle of this second digital signal is less than the responsibility cycle of this first digital signal, in single cycle, when this second digital signal is down to electronegative potential from high potential, this second compensating signal rises to high potential from electronegative potential, and this first compensating signal then maintains electronegative potential.
Aforesaid motor drive, in single cycle, the first wherein said compensating signal and the second described compensating signal to be the time of high potential be for this count difference value 1/N doubly, N be more than or equal to one integer.
Aforesaid motor drive, when the responsibility cycle of the second wherein said digital signal is less than the responsibility cycle of the first described digital signal, in single cycle, when this first digital signal is down to electronegative potential from high potential and after one first scheduled time, this second compensating signal rises to high potential from electronegative potential, and this first compensating signal then maintains electronegative potential; When the responsibility cycle of the first described digital signal is less than the responsibility cycle of the second described digital signal, in single cycle, when this second digital signal is down to electronegative potential from high potential and after one second scheduled time, this first compensating signal rises to high potential from electronegative potential, and this second compensating signal then maintains electronegative potential.
Aforesaid motor drive, wherein said first the scheduled time=(this second digital signal is time this count difference value m-of electronegative potential in single cycle)/N, N be more than or equal to one integer; This second the scheduled time=(this first digital signal is time this count difference value m-of electronegative potential in single cycle)/N, N be more than or equal to one integer.
Aforesaid motor drive, wherein said comparing unit comprises: one first peak value fixture, the crest value of the first described induced signal that the magnetoelastic transducer described in detecting produces, one second peak value fixture, the crest value of the second described induced signal that the magnetoelastic transducer described in detecting produces, and a peak comparator, be coupled to this first peak value fixture and this second peak value fixture, in order to the crest value and this second induced signal that compare this first induced signal crest value between difference and produce one and can compensate one of them crest difference of this first drive singal and this second drive singal.
Aforesaid motor drive, wherein said compensating unit comprises: an analog signal adjuster, the described crest difference exported according to described peak comparator produces one relevant with the crest value of described first induced signal first and simulates and adjust signal, and one relevant with the crest value of described second induced signal second simulates and adjusts signal; One first change-over circuit, receives this first induced signal that described magnetoelastic transducer produces, and according to a reference signal, this first induced signal is converted to one first digital signal of digital form; One second change-over circuit, receives this second induced signal that described magnetoelastic transducer produces, and according to described reference signal, this second induced signal is converted to one second digital signal of digital form; One first variable resistor group, is coupled to this first change-over circuit, and changes its resistance value by this first simulation adjustment signal, changes this first digital signal with correspondence; And a second adjustable resistance group, be coupled to this second change-over circuit, and change its resistance value by this second simulation adjustment signal, change this second digital signal with correspondence.
Aforesaid motor drive, wherein said compensating unit comprises: a digital signal adjuster, is coupled to this subtraction circuit, and it produces should one first digital compensation signal of count difference value and one second digital compensation signal according to this count difference value; One first variable resistor group, is coupled to this first change-over circuit, and changes its resistance value by this first numeral adjustment signal, changes this first digital signal with correspondence; One the second adjustable resistance group, is coupled to this second change-over circuit, and changes its resistance value by this second numeral adjustment signal, changes this second digital signal with correspondence.
The present invention compared with prior art has obvious advantage and beneficial effect.As known from the above, for achieving the above object, the invention provides a kind of motor drive and driving method thereof.This motor drive be with a motor and a magnetoelastic transducer with the use of.Magnetoelastic transducer produces the first induced signal of an expression S pole position of magnetic pole according to motor operation, and the second induced signal of an expression N pole position of magnetic pole, and this motor drive comprises: a driver element, a comparing unit and a compensating unit.
By technique scheme, the present invention at least has following advantages and beneficial effect:
The first induced signal induced magnetoelastic transducer by motor drive and the second induced signal are compensated, and the operating efficiency of motor and useful life can be promoted, and the electromagnetism produced when simultaneously reducing motor operation involves noise.
In sum, a kind of motor driving method of the present invention, be applied to a motor drive, motor drive be with a motor and a magnetoelastic transducer with the use of, magnetoelastic transducer produces the first induced signal of an expression S pole position of magnetic pole according to motor operation, and the second induced signal that represents N pole position of magnetic pole, motor drive is according to the first induced signal and the running of the second induced signal CD-ROM drive motor, first this motor driving method is compare the first induced signal and the responsibility cycle between the second induced signal last cycle, to obtain both responsibility cycle gaps, again according to this responsibility cycle gap, the responsibility cycle in compensate the first induced signal and the second induced signal wherein next cycle of responsibility cycle smaller, the noise produced when so can promote the operating efficiency of motor and reduce motor operation simultaneously.The present invention has significant progress technically, and has obvious good effect, is really a new and innovative, progressive, practical new design.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to technological means of the present invention can be better understood, and can be implemented according to the content of specification, and can become apparent to allow above and other object of the present invention, feature and advantage, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, be described in detail as follows.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that prior art motor system is described;
Fig. 2 is the oscillogram of the first induced signal and the second induced signal illustrating that prior art magnetoelastic transducer induces;
Fig. 3 illustrates that motor drive of the present invention is the overall schematic coordinated with motor, magnetoelastic transducer and switch unit;
Fig. 4 is the circuit block diagram of the first preferred embodiment that motor drive of the present invention is described;
Fig. 5 is the flow chart of the motor drive CD-ROM drive motor running that the first preferred embodiment is described;
Fig. 6 is the oscillogram of the signal that in the motor drive that the first preferred embodiment is described, each circuit exports;
Fig. 7 illustrates that the phase adjusting module of the first preferred embodiment is that the mode delaying compensation compensates the second digital signal;
Fig. 8 illustrates that the phase adjusting module of the first preferred embodiment compensates the second digital signal in the mode of compensated in advance;
Fig. 9 is the circuit block diagram of the second preferred embodiment that motor drive of the present invention is described;
Figure 10 is the flow chart of the motor drive CD-ROM drive motor running that the second preferred embodiment is described;
Figure 11 is the oscillogram that the first induced signal of the second preferred embodiment, the second induced signal, the first digital signal and the second digital signal are described;
Figure 12 is the first induced signal and the oscillogram of the first digital signal before and after compensating that the second preferred embodiment is described; And
Figure 13 is the circuit block diagram of the 3rd preferred embodiment that motor drive of the present invention is described.
Embodiment
For further setting forth the present invention for the technological means reaching predetermined goal of the invention and take and effect, below in conjunction with accompanying drawing and preferred embodiment, to the motor drive proposed according to the present invention and driving method thereof, its embodiment, structure, method, step, feature and effect thereof, be described in detail as follows.
Consulting Fig. 3, is the first preferred embodiment of motor drive of the present invention, this motor drive 30 be with motor 10, magnetoelastic transducer 20 and a switch unit 40 with the use of.In the present embodiment, magnetoelastic transducer 20 can be a Hall element, when it operates according to motor 10 magnetic pole change and induce the first induced signal Vh1 of an expression S pole position of magnetic pole, and the second induced signal Vh2 that represents N pole position of magnetic pole.The motor drive 30 of the present embodiment magnetoelastic transducer 20 is subject to the impact of the factor such as manufacturing process and the external world and induces unequal first induced signal Vh1 and the second induced signal Vh2 and compensate, make motor 10 identical with the time of reverse rotation in the time rotated forward, to promote operating efficiency and the useful life of motor 10, reduce the noise produced when motor 10 operates.
Coordinate and consult Fig. 4, motor drive 30 comprises comparing unit 31, compensating unit 32 and a driver element 33.Comparing unit 31 is coupled to magnetoelastic transducer 20, in order to receive the gap of the first induced signal Vh1 and the second induced signal Vh2 responsibility cycle more between the two; Compensating unit 32 is coupled to comparing unit 31, in order to compensate the responsibility cycle of the first induced signal Vh1 and the second induced signal Vh2 wherein responsibility cycle smaller; Driver element 33 is coupled to compensating unit 32, produces one first drive singal Vd1 and one second drive singal Vd2, operate with CD-ROM drive motor 10 in order to corresponding according to the first induced signal Vh1 and the second induced signal Vh2.
Briefly, the design concept of the present embodiment is the gap first comparing responsibility cycle between the first induced signal Vh1 and the second induced signal Vh2 by comparing unit 31, prolongation first induced signal Vh1 and the second induced signal Vh2 wherein responsibility cycle smaller is gone according to this gap more afterwards, the responsibility cycle identical (or close) of the first drive singal Vd1 exported to make driver element 33 and the second drive singal Vd2 by compensating unit 32.
Comparing unit 31 comprises one to be coupled to the first change-over circuit 311 and the second change-over circuit 312 in order to second change-over circuit 312, of the second induced signal Vh2 receiving magnetoelastic transducer 20 and induce counting circuit 313 in order to the first change-over circuit 311, of receiving the first induced signal Vh1 that magnetoelastic transducer 20 induces, and the subtraction circuit 314 that is coupled to counting circuit 313.
Compensating unit 32 comprises one and is coupled to the phase adjusting module 320,1 first of the subtraction circuit 314 of comparing unit 31 or lock 321 and one second or lock 322.First or two inputs of lock 321 be respectively coupled to the output of the first change-over circuit 311 and the output of phase adjusting module 320, and first or the output of lock 321 be coupled to driver element 33; Second or two inputs of lock 322 be respectively coupled to the output of the second change-over circuit 312 and the output of phase adjusting module 320, and second or the output of lock 322 be coupled to driver element 33.
To the flow chart of Fig. 5 be coordinated below, and describe comparing unit 31 in detail and compare the gap of responsibility cycle between two induced signal Vh1, Vh2 and compensating unit 32 is the responsibility cycle how compensating two induced signal Vh1, Vh2.
Step S10, the first induced signal Vh1 and the second induced signal Vh2 is converted to one first digital signal Vg1 and the one second digital signal Vg2 of digital form by the first change-over circuit 311 and the second change-over circuit 312 respectively.
In the present embodiment, first change-over circuit 311 is identical with the circuit of the second change-over circuit 312 and be all comparator (comparator), and Fig. 6 is consulted in cooperation, with the first change-over circuit 311, it compares the voltage quasi position of the first induced signal Vh1 and a reference voltage Vref, if the voltage of the first induced signal Vh1 is greater than the voltage of reference voltage Vref, then the first digital signal Vg1 is high potential (digitone), is then electronegative potential (digit zero) on the contrary.Certainly, the first change-over circuit 311 and the second change-over circuit 312 also can be different circuit, as long as the first induced signal Vh1 and the second induced signal Vh2 can be converted to the signal of digital form.
Step S20, counting circuit 313 counts for the responsibility cycle of the first digital signal Vg1 and the second digital signal Vg2 respectively, to produce one first count value Vt1 and one second count value Vt2.Counting circuit 313 is a digit counter (counter), and as shown in Figure 6, be wherein the responsibility cycle being greater than the second digital signal Vg2 for the responsibility cycle of the first digital signal Vg1, therefore, the first count value Vt1 can be greater than the second count value Vt2.
Step S30, the first count value Vt1 and the second count value Vt2 subtracts each other and produces the count difference value Ver of responsibility cycle gap between an expression first induced signal Vh1 and the second induced signal Vh2 by subtraction circuit 314.
Step S40, the phase adjusting module 320 of compensating unit 32 produces one first compensating signal Vc1 and the one second compensating signal Vc2 of corresponding count difference value Ver according to count difference value Ver.
Step S50, first or lock 321 export one according to the first digital signal Vg1 and the first compensating signal Vc1 and produce for driver element 33 the first output signal Vo1 driving the first dynamic signal Vd1, and second or lock 322 export according to the second digital signal Vg2 and the second compensating signal Vc2 one to produce the second drive singal Vd2 the second output signal Vo2 for driver element 33.
As shown in Figure 7, in single cycle, responsibility cycle due to the first digital signal Vg1 is greater than the responsibility cycle of the second digital signal Vg2, and therefore, phase adjusting module 320 can compensate the second digital signal Vg2 (namely extending the time that it is high potential).Phase adjusting module 320 produces the second compensating signal Vc2 according to count difference value Ver, and export when the second digital signal Vg2 is down to electronegative potential from high potential, namely when the second digital signal Vg2 is down to electronegative potential from high potential, second compensating signal Vc2 rises to high potential (time t0) from electronegative potential, make first or the second output signal of exporting of lock 321 Vo2 is sustainable maintains high potential (namely t0 to t2 during this period of time), until the second compensating signal Vc2 is down to electronegative potential from high potential.Therefore, the responsibility cycle (t1-t0) compared to the second digital signal Vg2 is length by the responsibility cycle (t1-t2) of the second digital signal Vg2 (i.e. the second output signal Vo2) after compensation.In addition, because the first digital signal Vg1 does not need to compensate, therefore the first compensating signal Vc1 can maintain electronegative potential (Fig. 6), makes the first output signal Vo1 can be identical with the first digital signal Vg1.
On the contrary, if the responsibility cycle of the first digital signal Vg1 is less than the responsibility cycle of the second digital signal Vg2, then phase adjusting module 320 can compensate the first digital signal Vg1.Phase adjusting module 320 produces the first compensating signal Vc1 according to count difference value Ver, and export when the first digital signal Vg1 is down to electronegative potential from high potential, namely when the first digital signal Vg1 is down to electronegative potential from high potential, first compensating signal Vc1 rises to high potential from electronegative potential, the responsibility cycle of the first output signal Vo1 can be extended, and the second compensating signal Vc2 then maintains electronegative potential.
What illustrate is, in the present embodiment, first compensating signal Vc1 or the second compensating signal Vc2 to be the time of high potential be for count difference value Ver 1/N doubly, N be more than or equal to 1 integer, that is in step s 50, the responsibility cycle in the first digital signal Vg1 and the second digital signal Vg2 wherein next cycle of responsibility cycle smaller will be extended the 1/N of count difference value Ver doubly, and N value can be set by related personnel by modes such as softwares and changed, certainly not only like this, compensating signal is can change according to different demand equally from the relation between count difference value Ver the time of high potential, but not as limit.
Step S60, the first output signal Vo1 and second output signal Vo2 carries out changing and corresponding generation the first drive singal Vd1 and the second drive singal Vd2 by driver element 33.
Step S70, switch unit 40 produce according to the first drive singal Vd1 and the second drive singal Vd2 can CD-ROM drive motor 10 operate drive current Id, make the second induced signal Vh2 in next cycle responsibility cycle can with the responsibility cycle identical (or close) of the first induced signal Vh1 in next cycle, i.e. the time identical (or close) of motor 10 time of (obtaining forward drive current+Id) rotating forward and reverse rotation (obtaining reverse drive electric current-Id).
In other words, motor drive 30 is that the first induced signal Vh1 of responding to magnetoelastic transducer 20 in the mode of numeral and the second induced signal Vh2 compensate, first it utilize counting circuit 313 to count out the responsibility cycle (step S20) of the first digital signal Vg1 and the second digital signal Vg2, again both are subtracted each other the gap (step S30) learning responsibility cycle between two induced signals, the responsibility cycle of responsibility cycle smaller between the first digital signal Vg1 and the second digital signal Vg2 is extended (step S40 and S50) according to this gap by phase adjusting module 320 again, make the responsibility cycle of the first output signal Vo1 identical (or close) in the responsibility cycle of the second output signal Vo2, and then make motor 10 identical with the time of reverse rotation in the time rotated forward, the noise produced during to promote the operating efficiency of motor 10 and to reduce its running.
In addition, consult Fig. 7, phase adjusting module 320 delays the responsibility cycle that mode that (delay) compensate extends the second digital signal Vg2, namely after the second digital signal Vg2 is down to electronegative potential from high potential, then the second compensating signal Vc2 is superimposed to the second digital signal Vg2 and forms the second output signal Vo2.
Alternatively, phase adjusting module 320 also can shift to an earlier date the responsibility cycle that mode that (early) compensate extends the second digital signal Vg2, as shown in Figure 8.Illustrate with above-mentioned example equally, in single cycle, the responsibility cycle of the second digital signal Vg2 is the responsibility cycle being less than the first digital signal Vg1, therefore, phase adjusting module 320 can control the first digital signal Vg1 when being down to electronegative potential from high potential (time t0 ') and after one first scheduled time tp1, second compensating signal Vc2 is risen to high potential (time t1 ') from electronegative potential, make the second output signal Vo2 will rise to the time point of high potential from electronegative potential early than the second digital signal Vg2 from the time point that electronegative potential rises to high potential, therefore the responsibility cycle (t1 '-t2 ') of the second output signal Vo2 will be greater than the responsibility cycle (t3-t2 ') of the second digital signal Vg2, first compensating signal Vc1 then maintains electronegative potential.
On the contrary, if the responsibility cycle of the first digital signal Vg1 is less than the responsibility cycle of the second digital signal Vg2, then phase adjusting module 320 can when the second digital signal Vg2 is down to electronegative potential from high potential and after one second scheduled time, first compensating signal Vc1 is risen to high potential from electronegative potential, the responsibility cycle of the first digital signal Vg1 can be extended, and the second compensating signal Vc2 now then maintains electronegative potential.
In the setting of the present embodiment, the first scheduled time tp1=(the second digital signal Vg2 is the time m-count difference value Ver of electronegative potential in single cycle)/N, N be more than or equal to one integer; Similarly, second the scheduled time=(the first digital signal Vg1 is the time m-count difference value Ver of electronegative potential in single cycle)/N, N be more than or equal to one integer, but not to be limited with above-mentioned setting.
In addition, phase adjusting module 320 also can use simultaneously delays compensation and compensated in advance two kinds of modes compensate, and details is all same as described above, therefore does not add to repeat.
Consult Fig. 3 and Fig. 9, Fig. 9 is the second preferred embodiment of motor drive 30 of the present invention, in the present embodiment, motor drive 30 the first induced signal Vh1 that to be modes of simulating respond to magnetoelastic transducer 20 and the second induced signal Vh2 compensates.
Motor drive 30 comprises comparing unit 31, compensating unit 32 and a driver element 33 equally.
Comparing unit 31 comprises the second peak value fixture 316 that a first peak value fixture 315, being coupled to magnetoelastic transducer 20 is coupled to magnetoelastic transducer 20, and the peak comparator 317 that is coupled to the first peak value fixture 315 and the second peak value fixture 316.In the present embodiment, first peak value fixture 315 identical with the second peak value fixture 316 and be all low pass filter (low pass filter), rectifier, peak value detector (peak detector) and peak holding circuit (peak & hold circuit) one of them, but not as limit.
Compensating unit 32 comprises an analog signal adjuster 323, being coupled to peak comparator 317 is coupled to the first change-over circuit 324 in order to second change-over circuit 325, of the second induced signal Vh2 receiving magnetoelastic transducer 20 and produce the first variable resistor group 326 in order to first change-over circuit 324, of the first induced signal Vh1 that receives magnetoelastic transducer 20 and produce, and the second adjustable resistance group 327 that is coupled to the second change-over circuit 325.
First variable resistor group 326 controls by analog signal adjuster 323 and changes its resistance value, and comprising the first variable resistor R1 between a non-return end being coupled to a supply power supply Vdd and the first change-over circuit 324 (operational amplifier), and one is coupled to the second adjustable resistance R2 between the non-return end of the first change-over circuit 324 and ground; The second adjustable resistance group 327 controls by analog signal adjuster 323 and changes its resistance value equally, and be coupled to the 3rd variable resistor R3 between supply power supply Vdd and the backward end of the second change-over circuit 325 comprising one, and one is coupled to the 4th variable resistor R4 between the backward end of the second change-over circuit 325 and ground.
Then coordinate and consult Figure 10, describe the motor drive 30 of the present embodiment how to compensate the first induced signal Vh1 and the second induced signal Vh2 in detail, and the action of each circuit element and function.
Step S81, the first peak value fixture 315 and the second peak value fixture 316 receive the first induced signal Vh1 and the second induced signal Vh2 respectively, and detect the crest value of the first induced signal Vh1 and the second induced signal Vh2 respectively.
Step S82, peak comparator 317 compares the difference between the crest value of the first induced signal Vh1 and the crest value of the second induced signal Vh2 and produces one and can compensate one of them crest difference Vper of the first drive singal Vd1 and the second drive singal Vd2.
Step S83, the crest difference Vper that analog signal adjuster 323 exports according to peak comparator 317 produces relevant with the crest value of the first induced signal Vh1 first and simulates and adjust signal Vac1, and relevant with the crest value of the second induced signal Vh2 second simulates and adjust signal Vac2.
Step S84, the first variable resistor group 326 and the second adjustable resistance group 327 are simulated according to first respectively and are adjusted signal Vac1 and second and simulate and adjust signal Vac2 and the resistance value that changes itself.
Step S85, the first induced signal Vh1 and the second induced signal Vh2 is converted to the first digital signal Vg1 and the second digital signal Vg2 of digital form by the first change-over circuit 324 and the second change-over circuit 325 respectively.
Coordinate and consult Figure 11, the crest value of the first induced signal Vh1 is greater than for the crest value of the second induced signal Vh2, when identical charge and discharge speed, the responsibility cycle of the first digital signal Vg1 that the first change-over circuit 324 produces can be greater than the responsibility cycle of the second digital signal Vg2 that the second change-over circuit 325 produces.Therefore coordinate and consult Figure 12, peak comparator 317 is after the difference comparing crest value between the first induced signal Vh1 and the second induced signal Vh2 (step S82), analog signal adjuster 323 can reduce the resistance value (step S83 and S84) of the first variable resistor R1 in the first variable resistor group 326 according to crest difference Vper, the crest value of the first induced signal Vh1 is made to rise (as shown in dotted lines in Figure 12), therefore the responsibility cycle of the first digital signal Vg1 that the first change-over circuit 324 produces will be increased, so can identical with the responsibility cycle of the second digital signal Vg2 (or close), make motor 10 in the time the rotated forward object identical with the time of reverse rotation to reach.
What illustrate is, in the present embodiment, first change-over circuit 311 and second change-over circuit 312 of the first change-over circuit 324 and the second change-over circuit 325 and the first preferred embodiment are identical, with the first change-over circuit 324, that the first induced signal Vh1 and a reference voltage Vref are compared equally, if the voltage of the first induced signal Vh1 is greater than the voltage of reference voltage Vref, then the first digital signal Vg1 is high potential (digit one), is then electronegative potential (digit zero) on the contrary.
Step S86, the first digital signal Vg1 and the second digital signal Vg2 carries out changing and corresponding generation the first drive singal Vd1 and the second drive singal Vd2 by driver element 33.
Step S87, switch unit 40 produce according to the first drive singal Vd1 and the second drive singal Vd2 can CD-ROM drive motor 10 operate drive current Id, make the second induced signal Vh2 in next cycle responsibility cycle can with the responsibility cycle identical (or close) of the first induced signal Vh1 in next cycle.Step S60 and the S70 (Fig. 5) of the step S86 of the present embodiment and S87 and the first preferred embodiment are identical, therefore are not repeating.
Therefore, the motor drive 30 of the present embodiment is that direct the first induced signal Vh1 for analog form and the second induced signal Vh2 compares and compensation, and the first digital signal Vg1 and the second digital signal Vg2 that just the first induced signal Vh1 and the second induced signal Vh2 are converted to digital form afterwards export; And the motor drive 30 of the first preferred embodiment is the first digital signal Vg1 and the second digital signal Vg2 that first the first induced signal Vh1 of analog form and the second induced signal Vh2 are converted to digital form, just compare and compensation for the first digital signal Vg1 and the second digital signal Vg2 afterwards, therefore effect of two kinds of modes all attainable cost invention.
Consult Fig. 3 and Figure 13, Figure 13 is the 3rd preferred embodiment of motor drive of the present invention, in the present embodiment, motor drive 30 is that the first induced signal Vh1 of simultaneously using the mode of simulation and numeral to respond to magnetoelastic transducer 20 and the second induced signal Vh2 compensate.
Motor drive 30 comprises comparing unit 31, compensating unit 32 and a driver element 33.
Comparing unit 31 comprises one to be coupled to the first change-over circuit 311 and the second change-over circuit 312 in order to second change-over circuit 312, of the second induced signal Vh2 receiving magnetoelastic transducer 20 and produce counting circuit 313 in order to the first change-over circuit 311, of receiving the first induced signal Vh1 that magnetoelastic transducer 20 produces, and the subtraction circuit 314 that is coupled to counting circuit 313.The comparing unit 31 of the present embodiment is identical with the comparing unit 31 of the first preferred embodiment, therefore does not add to repeat.
Compensating unit 32 comprises digital signal adjuster 328,1 first variable resistor group 329 and a second adjustable resistance group 330.Digital signal adjuster 328 is coupled to subtraction circuit 314, and it produces one first digital compensation signal Vdc1 and the one second digital compensation signal Vdc2 of corresponding count difference value Ver according to count difference value Ver; First variable resistor group 329 is coupled to the first change-over circuit 311, and by the first numeral adjustment signal Vdc1 and change its resistance value, changes with correspondence the first digital signal Vg1 that the first change-over circuit 311 exports; The second adjustable resistance group 330 is coupled to the second change-over circuit 312, and by the second numeral adjustment signal Vdc2 and change its resistance value, changes with correspondence the second digital signal Vdc2 that the second change-over circuit 312 exports.
What illustrate is, first variable resistor group 329 and the second adjustable resistance group 330 are identical with the first variable resistor group 326 of the second preferred embodiment and the second adjustable resistance group 327, difference is only that the first variable resistor group 329 of the present embodiment and the second adjustable resistance group 330 are the Digital Signals exported by digital signal adjuster 328, and the first variable resistor group 326 of the second preferred embodiment and the second adjustable resistance group 327 to be the analog signals exported by analog signal adjuster 323 control.
Therefore, after first induced signal Vh1 and the second induced signal Vh2 converts the first digital signal Vg1 and the second digital signal Vg2 to by the first change-over circuit 311 and the second change-over circuit 312, counting circuit 313 and subtraction circuit 314 can calculate the gap (i.e. count difference value Ver) of responsibility cycle between the two, changed the resistance value of the first variable resistor group 329 and the second adjustable resistance group 330 afterwards again according to count difference value Ver by digital signal adjuster 328, so can make equally the second induced signal Vh2 in next cycle responsibility cycle can with the responsibility cycle identical (or close) of the first induced signal Vh1 in next cycle.
In sum, the first induced signal Vh1 that motor drive 30 of the present invention induces by comparing unit 31 wherein and compensating unit 32 for magnetoelastic transducer 20 and the second induced signal Vh2 compares and compensation, make motor 10 can identical with the time in reverse rotation (or close) in the time rotated forward, so can promote operating efficiency and the useful life of motor 10, and the noise produced when reducing electromagnetic generation and running, therefore really can reach object of the present invention.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, when the method and technology contents that can utilize above-mentioned announcement are made a little change or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (18)
1. a motor driving method, be applied to a motor drive, this motor drive be with a motor and a magnetoelastic transducer with the use of, this magnetoelastic transducer produces the first induced signal of an expression S pole position of magnetic pole according to this motor operation, and the second induced signal that represents N pole position of magnetic pole, this motor drive drives this motor operation according to this first induced signal and the second induced signal; It is characterized in that:
Wherein said driving method comprises following steps:
(A) this first induced signal and the responsibility cycle between this second induced signal last cycle is compared, to obtain both responsibility cycle gaps;
(B) according to this responsibility cycle gap, the responsibility cycle in compensate this first induced signal and this second induced signal wherein next cycle of responsibility cycle smaller.
2. motor driving method according to claim 1, is characterized in that: wherein said step (A) comprises following sub-step:
(A-1) respectively this first induced signal and this second induced signal are converted to one first digital signal and one second digital signal of digital form;
(A-2) count for the responsibility cycle of this first digital signal and this second digital signal respectively, to produce one first count value and one second count value; And
(A-3) this first count value and this second count value are subtracted each other and produced the count difference value of responsibility cycle gap between this first induced signal of an expression and this second induced signal.
3. motor driving method according to claim 2, is characterized in that: wherein said step (B) is the responsibility cycle according to this count difference value extend this first induced signal and this second induced signal wherein next cycle of responsibility cycle smaller.
4. motor driving method according to claim 3, it is characterized in that: in wherein said step (B), in this first induced signal and this second induced signal the responsibility cycle in next cycle of responsibility cycle smaller be extend this count difference value 1/N doubly, N be greater than zero integer.
5. motor driving method according to claim 1, is characterized in that: wherein said step (A) is the crest difference being subtracted from one another the crest value of the crest value of this first induced signal and this second induced signal to produce responsibility cycle gap between this first induced signal of an expression and this second induced signal.
6. motor driving method according to claim 5, is characterized in that: wherein said step (B) draws high the crest value of this first induced signal and this second induced signal wherein crest value smaller.
7. motor driving method according to claim 6, it is characterized in that: in wherein said step (B), the responsibility cycle in this first induced signal and this second induced signal wherein next cycle of responsibility cycle smaller be extend this crest difference 1/N doubly, N be more than or equal to one integer.
8. a motor drive, be with a motor and a magnetoelastic transducer with the use of, this magnetoelastic transducer produces the first induced signal of an expression S pole position of magnetic pole according to this motor operation, and the second induced signal of an expression N pole position of magnetic pole, it is characterized in that:
Wherein said motor drive comprises:
One driver element, produces one first drive singal and one second drive singal to drive this motor operation according to this first induced signal and the second induced signal correspondence;
One comparing unit, compares the responsibility cycle in the last cycle of this first induced signal and this second induced signal, to obtain both responsibility cycle gaps; And
One compensating unit, according to the responsibility cycle in this responsibility cycle gap compensate this first induced signal and this second induced signal wherein next cycle of responsibility cycle smaller.
9. motor drive according to claim 8, is characterized in that: wherein said comparing unit comprises:
One first change-over circuit, receives this first induced signal that this magnetoelastic transducer produces, and this first induced signal is converted to one first digital signal of digital form,
One second change-over circuit, receives this second induced signal that this magnetoelastic transducer produces, and this second induced signal is converted to one second digital signal of digital form,
One counting circuit, is coupled to this first change-over circuit and this second change-over circuit, and counts for the responsibility cycle of this first digital signal and this second digital signal, to produce one first count value and one second count value, and
One subtraction circuit, is coupled to this counting circuit, in order to this first count value and this second count value to be subtracted each other and to produce the count difference value of this responsibility cycle gap of an expression.
10. motor drive according to claim 9, is characterized in that: wherein said compensating unit is the responsibility cycle according to this count difference value extend this first digital signal and this second digital signal wherein next cycle of responsibility cycle smaller.
11. motor drives according to claim 10, is characterized in that: wherein said compensating unit comprises:
One phase adjusting module, is coupled to this subtraction circuit, and it produces should one first compensating signal of count difference value and one second compensating signal according to this count difference value,
One first or lock, this first or two inputs of lock be respectively coupled to this first change-over circuit and this phase adjusting module, and this first or the output of lock be coupled to this driver element, this first or lock export according to this first digital signal and this first compensating signal one to produce this first drive singal the first output signal for this driver element, and
One second or lock, this second or two inputs of lock be respectively coupled to this change-over circuit and this phase adjusting module, and this second or the output of lock be coupled to this driver element, this second or lock export according to this second digital signal and this second compensating signal one to produce this second drive singal the second output signal for this driver element.
12. motor drives according to claim 11, it is characterized in that: when the responsibility cycle of the first wherein said digital signal is less than the responsibility cycle of this second digital signal, in single cycle, when this first digital signal is down to electronegative potential from high potential, this first compensating signal rises to high potential from electronegative potential, and this second compensating signal then maintains electronegative potential; When the responsibility cycle of this second digital signal is less than the responsibility cycle of this first digital signal, in single cycle, when this second digital signal is down to electronegative potential from high potential, this second compensating signal rises to high potential from electronegative potential, and this first compensating signal then maintains electronegative potential.
13. motor drives according to claim 12, it is characterized in that: in single cycle, the first wherein said compensating signal and the second described compensating signal to be the time of high potential be for this count difference value 1/N doubly, N be more than or equal to one integer.
14. motor drives according to claim 11, it is characterized in that: when the responsibility cycle of the second wherein said digital signal is less than the responsibility cycle of the first described digital signal, in single cycle, when this first digital signal is down to electronegative potential from high potential and after one first scheduled time, this second compensating signal rises to high potential from electronegative potential, and this first compensating signal then maintains electronegative potential; When the responsibility cycle of the first described digital signal is less than the responsibility cycle of the second described digital signal, in single cycle, when this second digital signal is down to electronegative potential from high potential and after one second scheduled time, this first compensating signal rises to high potential from electronegative potential, and this second compensating signal then maintains electronegative potential.
15. motor drives according to claim 14, is characterized in that: wherein said first the scheduled time=(this second digital signal is time this count difference value m-of electronegative potential in single cycle)/N, N be more than or equal to one integer; This second the scheduled time=(this first digital signal is time this count difference value m-of electronegative potential in single cycle)/N, N be more than or equal to one integer.
16. motor drives according to claim 8, is characterized in that: wherein said comparing unit comprises:
One first peak value fixture, the crest value of the first described induced signal that the magnetoelastic transducer described in detecting produces,
One second peak value fixture, the crest value of the second described induced signal that the magnetoelastic transducer described in detecting produces, and
One peak comparator, be coupled to this first peak value fixture and this second peak value fixture, in order to the crest value and this second induced signal that compare this first induced signal crest value between difference and produce one and can compensate one of them crest difference of this first drive singal and this second drive singal.
17. motor drives according to claim 16, is characterized in that: wherein said compensating unit comprises:
One analog signal adjuster, the described crest difference exported according to described peak comparator produces one relevant with the crest value of described first induced signal first and simulates and adjust signal, and one relevant with the crest value of described second induced signal second simulates and adjusts signal;
One first change-over circuit, receives this first induced signal that described magnetoelastic transducer produces, and according to a reference signal, this first induced signal is converted to one first digital signal of digital form;
One second change-over circuit, receives this second induced signal that described magnetoelastic transducer produces, and according to described reference signal, this second induced signal is converted to one second digital signal of digital form;
One first variable resistor group, is coupled to this first change-over circuit, and changes its resistance value by this first simulation adjustment signal, changes this first digital signal with correspondence; And
One the second adjustable resistance group, is coupled to this second change-over circuit, and changes its resistance value by this second simulation adjustment signal, changes this second digital signal with correspondence.
18. motor drives according to claim 9, is characterized in that: wherein said compensating unit comprises:
One digital signal adjuster, is coupled to this subtraction circuit, and it produces should one first digital compensation signal of count difference value and one second digital compensation signal according to this count difference value;
One first variable resistor group, is coupled to this first change-over circuit, and changes its resistance value by this first numeral adjustment signal, changes this first digital signal with correspondence;
One the second adjustable resistance group, is coupled to this second change-over circuit, and changes its resistance value by this second numeral adjustment signal, changes this second digital signal with correspondence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010233729.5A CN102340272B (en) | 2010-07-19 | 2010-07-19 | Motor drive and driving method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010233729.5A CN102340272B (en) | 2010-07-19 | 2010-07-19 | Motor drive and driving method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102340272A CN102340272A (en) | 2012-02-01 |
| CN102340272B true CN102340272B (en) | 2015-10-07 |
Family
ID=45515820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010233729.5A Active CN102340272B (en) | 2010-07-19 | 2010-07-19 | Motor drive and driving method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102340272B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5838128A (en) * | 1996-08-01 | 1998-11-17 | Sgs-Thomson Microelectronics S.R.I. | Reconstruction of BEMF signals for synchronizing the driving of brushless- sensorless motors by means of predefined driving signals |
| CN201238280Y (en) * | 2008-08-12 | 2009-05-13 | 普诚科技股份有限公司 | Motor driving apparatus |
| CN101546977A (en) * | 2008-03-27 | 2009-09-30 | 普诚科技股份有限公司 | Control device and driving method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4249916B2 (en) * | 2000-09-18 | 2009-04-08 | エドワーズ株式会社 | Brushless motor control circuit, brushless motor device, and vacuum pump device |
-
2010
- 2010-07-19 CN CN201010233729.5A patent/CN102340272B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5838128A (en) * | 1996-08-01 | 1998-11-17 | Sgs-Thomson Microelectronics S.R.I. | Reconstruction of BEMF signals for synchronizing the driving of brushless- sensorless motors by means of predefined driving signals |
| CN101546977A (en) * | 2008-03-27 | 2009-09-30 | 普诚科技股份有限公司 | Control device and driving method |
| CN201238280Y (en) * | 2008-08-12 | 2009-05-13 | 普诚科技股份有限公司 | Motor driving apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102340272A (en) | 2012-02-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101299591B (en) | Method and system for motor control with delay compensation | |
| Ge et al. | A novel variable reluctance resolver with nonoverlapping tooth–coil windings | |
| CN103731077B (en) | The checkout gear of motor rotor position and rotating speed and method | |
| CN102299648B (en) | Power converter | |
| CN104079218B (en) | A kind of motor rotor position angle preparation method | |
| CN104518714A (en) | Resolver calibration for permanent magnet synchronous motor | |
| CN103222168B (en) | A kind of servomotor and servo-control system | |
| CN103684132A (en) | Apparatus for controlling motor for electric vehicle and method for reducing torque ripple using the same | |
| CN203554345U (en) | Constant phase shifting and changing signal detector for brushless DC motor | |
| JP2013110909A (en) | Motor drive and control method for the same | |
| CN102340272B (en) | Motor drive and driving method thereof | |
| CN204216805U (en) | Brushless DC motor without position sensor phase compensation device | |
| CN109039198A (en) | The bearing calibration of magneto hall position and device | |
| CN106208539A (en) | A kind of magneto-electric encoder | |
| CN103248298B (en) | A kind of driving method of direct current machine | |
| CN107407581A (en) | Magnetic detection device | |
| CN104378028A (en) | Phase compensation device and method of brushless direct-current motor without position sensor | |
| US8237599B2 (en) | Analog-to-digital converter in a motor control device | |
| TWI423582B (en) | Motor drive device and driving method thereof | |
| JP2013024766A5 (en) | ||
| CN106342389B (en) | Brshless DC motor sinusoidal drive device | |
| CN104333286B (en) | A kind of modification method realizing Hall element installation site deviation based on six pulsing algorithm | |
| CN103869155A (en) | Method and device for electric generator frequency measurement based on PLC high-speed input | |
| CN202676128U (en) | A conditioning circuit of a LVDT displacement sensor | |
| CN102739139B (en) | Rear electromagnetic force detection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |