CN103312106A - Novel permanent-magnet brushless direct-current motor, control method thereof and control circuit thereof - Google Patents
Novel permanent-magnet brushless direct-current motor, control method thereof and control circuit thereof Download PDFInfo
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- CN103312106A CN103312106A CN2013102332350A CN201310233235A CN103312106A CN 103312106 A CN103312106 A CN 103312106A CN 2013102332350 A CN2013102332350 A CN 2013102332350A CN 201310233235 A CN201310233235 A CN 201310233235A CN 103312106 A CN103312106 A CN 103312106A
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Abstract
The invention discloses a novel permanent-magnet brushless direct-current motor, a control method thereof and a control circuit thereof. The inventer uniformly arranges single-phase stator windings on the inner surface of the circumference of a stator by means of lap winding, a leading-out line of each coil element is connected onto the midpoint of an electronic inversing circuit, and a controller controls current directions of the coil elements according to level signals of a rotor position sensor to enable currents in an armature winding to be inversed according to the sequence of the coil elements and to enable a pole magnetic field and an armature magnetic field to be constantly in an orthogonal state, so that torque pulsation is effectively weakened. In addition, the rotor position sensor and the electronic inversing circuit replace a mechanical inverter and a carbon brush, so that the novel permanent-magnet brushless direct-current motor is simple in structure and easy to maintain.
Description
Technical field
The invention belongs to the brushless, permanently excited direct current motor technical field, relate in particular to a kind of novel permanent magnetic brushless DC motor and control method and control circuit.
Background technology
Therefore the plurality of advantages such as DC motor has good speed adjustment features, operational efficiency is high, starting torque is large, overload capacity is strong, dynamic characteristic is good are widely applied at aspects such as household electrical appliance, electric tool, medicine equipment, automobile and computer peripherals.But, owing to having brush and this deadly defect of commutator on the dc motor structure, brought a series of problem to practical application, be embodied in: complex structure, limited further dwindling of motor volume and weight; The existence of brush and commutator is so that reliability reduces, and fault is many, and the life-span is short; Easily produce commutation spark in the mechanical type electric current commutation process, not only easily damage commutator face, and limited the application of permanent magnet direct current motor in some occasion.
Brushless, permanently excited direct current motor has adopted position transducer and electronic switch converter to substitute brush and commutator, not only kept the good characteristic of traditional direct current machine but also have advantages of alternating current machine simple in structure, reliable, the life-span is long.The excellent properties that shows just because of brushless, permanently excited direct current motor, so that many scientific research institutions and company all put in this technical field in the world, the brushless dc machine technology is rapidly developed, and is used widely at aspects such as power drive system, AC servo drive system, optoelectronic integration, household appliances.Yet permanent-magnet brushless DC electric machine also exists many deficiencies and defective, wherein, distinct issues are: the commutation torque pulsation is large, and when low speed, situation is more serious especially, this has directly reduced the reliability of power transmission system characteristic and drive system, and brings the problems such as vibration, resonance, noise; In addition, its speed adjusting performance also can't be compared with DC motor with mechanical performance.
Summary of the invention
The technical problem to be solved in the present invention provides novel permanent magnetic brushless DC motor and control method and the control circuit that a kind of commutation torque pulsation is less and simple in structure, be easy to safeguard.
For solving the problems of the technologies described above, the present invention by the following technical solutions: the novel permanent magnetic brushless DC motor, comprise rotor, stator, single-phase stator winding and a plurality of rotor-position sensor, stator is arranged on outside the rotor, the single-phase stator winding is arranged on the stator; Rotor comprises the nonmagnetic rotor body and is nested in its outer rotor core, is nested with at least one pair of permanent magnet in the rotor core; The single-phase stator winding evenly is arranged on the inner surface of stator circumference with the form of lap winding; The number of rotor-position sensor is identical with the corresponding coil part number of a pair of magnetic pole, rotor-position sensor is arranged on the center of outer corresponding each coil part of single-phase stator winding, and the lead-out wire of each coil part is received respectively on the mid point of electronic commutation circuit.Electric current in the motor line coil element is by rotor-position sensor and electronic commutation circuit rather than by the mechanical commutator commutation, and when motor operation, the electric current in the armature winding press the coil part order and commutated.
Permanent magnet is nested in the rotor core and along its even circumferential setting.
The corresponding coil part number of a pair of magnetic pole is at least 3.
The corresponding coil part number of a pair of magnetic pole is odd number, when torque pulsation is less than the coil part number and is even number during odd number.
The control method of above-mentioned novel permanent magnetic brushless DC motor, controller are controlled the sense of current of each coil part according to the level signal of rotor-position sensor, the electric current in the armature winding is commutated by the coil part order.By this kind control mode, make magnetic pole and magnetic field and armature field be in all the time quadrature, thereby effectively weaken torque pulsation.
The control circuit of above-mentioned novel permanent magnetic brushless DC motor (bridge-type control circuit) mainly comprises controller, boostrap circuit and winding circuit, and winding circuit is by the boostrap circuit access controller; Winding circuit mainly comprises the single-phase stator winding, and the single-phase stator winding evenly is arranged on the inner surface of stator circumference with the form of lap winding, and the lead-out wire of each coil part is received respectively on the mid point of electronic commutation circuit.
For the large problem of existing permanent-magnet brushless DC electric machine commutation torque pulsation, the inventor evenly is arranged on the form of single-phase stator winding with lap winding on the inner surface of stator circumference, and the lead-out wire of each coil part is received respectively on the mid point of electronic commutation circuit, controller is controlled the sense of current of each coil part according to the level signal of rotor-position sensor, electric current in the armature winding is commutated by the coil part order, make magnetic pole and magnetic field and armature field be in all the time quadrature, thereby effectively weaken torque pulsation.Owing to the present invention includes an armature winding, the element coil number of packages of armature winding is much larger than the number of phases of brushless DC motor, so electric current commutation angle is little, and the torque pulsation that commutation produces is much smaller than the commutation torque pulsation of brushless DC motor.Simultaneously, rotor-position sensor and electronic commutation circuit replace mechanical commutator and carbon brush, and be simple in structure, is easy to safeguard.
Description of drawings
Fig. 1 is the structural representation of novel permanent magnetic brushless DC motor of the present invention.
Fig. 2 is the expanded view of lap winding in the novel permanent magnetic brushless DC motor of the present invention (1 extremely to 6 grooves).
Fig. 3 is control circuit schematic diagram in the novel permanent magnetic brushless DC motor of the present invention (1 extremely to 6 grooves).
Among the figure: 1 stator, 2 rotor-position sensors, 3 single-phase stator windings, 4 rotor cores, 5 nonmagnetic rotor bodies, 6 permanent magnets, 7 coil parts, 8 lead-out wires, 9 controllers, 10 boostrap circuits.
Embodiment
As shown in Figures 1 to 3, novel permanent magnetic brushless DC motor of the present invention comprises rotor, stator 1, single- phase stator winding 3 and 6 rotor-position sensors 2, and stator 1 is arranged on outside the rotor, and single-phase stator winding 3 is arranged on the stator 1; Rotor comprises nonmagnetic rotor body 5 and is nested in its outer rotor core 4, and permanent magnet 6 is nested in the rotor core 4 and along its even circumferential setting; Single-phase stator winding 3 evenly is arranged on the inner surface of stator 1 circumference with the form of lap winding; Corresponding coil part 7 numbers of a pair of magnetic pole are 6, the number of rotor-position sensor 2 is identical with corresponding coil part 7 numbers of a pair of magnetic pole, rotor-position sensor 2 is arranged on the center of single-phase stator winding 3 each coil part 7 of outer correspondence, and the lead-out wire of each coil part 7 is received respectively on the mid point of electronic commutation circuit.Electric current in the motor line coil element is by rotor-position sensor 2 and electronic commutation circuit rather than by the mechanical commutator commutation, and when motor operation, the electric current in the armature winding press the coil part order and commutated.
The control circuit of above-mentioned novel permanent magnetic brushless DC motor mainly comprises controller 9, boostrap circuit 10 and winding circuit, and winding circuit is by boostrap circuit 10 access controllers 9; Winding circuit mainly comprises single-phase stator winding 3, and single-phase stator winding 3 evenly is arranged on the inner surface of stator 1 circumference with the form of lap winding, and the lead-out wire of each coil part is received respectively on the mid point of electronic commutation circuit.
The control method of above-mentioned novel permanent magnetic brushless DC motor, controller 9 is controlled the sense of current of each coil part according to the level signal of rotor-position sensor 2, electric current in the armature winding is commutated by the coil part order, make magnetic pole and magnetic field and armature field be in all the time quadrature, thereby effectively weaken torque pulsation.
The control motor speed can adopt the PWM mode, and its modulating frequency increases with the increase of the difference of present speed and target velocity, is conducive to modulation and the regenerative braking of PWM.
According to actual needs, equally can be above-mentioned 1 extremely on the execution mode basis to 6 grooves, manufacture and design 1 extremely to the novel permanent magnetic brushless DC motor of n groove (n 〉=3), its design concept, principle and mechanical structure and control mode thereof all with 1 identical to the novel permanent magnetic brushless DC motor of 6 grooves extremely.
Claims (6)
1. a novel permanent magnetic brushless DC motor comprises rotor, stator, single-phase stator winding and a plurality of rotor-position sensor, and stator is arranged on outside the rotor, and the single-phase stator winding is arranged on the stator; Rotor comprises the nonmagnetic rotor body and is nested in its outer rotor core, is nested with at least one pair of permanent magnet in the rotor core; It is characterized in that: described single-phase stator winding evenly is arranged on the inner surface of stator circumference with the form of lap winding; The number of described rotor-position sensor is identical with the corresponding coil part number of a pair of magnetic pole, rotor-position sensor is arranged on the center of outer corresponding each coil part of single-phase stator winding, and the lead-out wire of each coil part is received respectively on the mid point of electronic commutation circuit.
2. novel permanent magnetic brushless DC motor according to claim 1 is characterized in that: described permanent magnet is nested in the described rotor core and along its even circumferential setting.
3. novel permanent magnetic brushless DC motor according to claim 2, it is characterized in that: the corresponding coil part number of described a pair of magnetic pole is at least 3.
4. novel permanent magnetic brushless DC motor according to claim 3, it is characterized in that: the corresponding coil part number of described a pair of magnetic pole is odd number.
5. the control method of described novel permanent magnetic brushless DC motor according to claim 1, it is characterized in that: controller is controlled the sense of current of each coil part according to the level signal of rotor-position sensor, and the electric current in the armature winding is commutated by the coil part order.
6. the control circuit of described novel permanent magnetic brushless DC motor according to claim 1 mainly comprises controller, boostrap circuit and winding circuit, and winding circuit is by the boostrap circuit access controller; Winding circuit mainly comprises the single-phase stator winding, it is characterized in that: described single-phase stator winding evenly is arranged on the inner surface of stator circumference with the form of lap winding, and the lead-out wire of each coil part is received respectively on the mid point of electronic commutation circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102332350A CN103312106A (en) | 2013-06-13 | 2013-06-13 | Novel permanent-magnet brushless direct-current motor, control method thereof and control circuit thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013102332350A CN103312106A (en) | 2013-06-13 | 2013-06-13 | Novel permanent-magnet brushless direct-current motor, control method thereof and control circuit thereof |
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| CN103312106A true CN103312106A (en) | 2013-09-18 |
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| CN2013102332350A Pending CN103312106A (en) | 2013-06-13 | 2013-06-13 | Novel permanent-magnet brushless direct-current motor, control method thereof and control circuit thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104979990A (en) * | 2015-07-03 | 2015-10-14 | 苏州八方电机科技有限公司 | Permanent magnet brushless direct-current motor base on multi-phase hall sensors |
| CN108705955A (en) * | 2018-04-20 | 2018-10-26 | 江苏理工学院 | A kind of hybrid power synthetic system based on magnetic gear brshless DC motor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2211136Y (en) * | 1994-11-17 | 1995-10-25 | 陈谷红 | Electrically-driven magnetic dc. electric moter without brush |
| US6359401B1 (en) * | 2000-10-16 | 2002-03-19 | Neil Garcia-Sinclair | Multi-phase bipolar brushless D.C. motor |
| CN101997377A (en) * | 2009-08-11 | 2011-03-30 | 西安磁林电气有限公司 | Multiphase winding permanent magnet brushless direct current motor as well as control method and control circuit thereof |
-
2013
- 2013-06-13 CN CN2013102332350A patent/CN103312106A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2211136Y (en) * | 1994-11-17 | 1995-10-25 | 陈谷红 | Electrically-driven magnetic dc. electric moter without brush |
| US6359401B1 (en) * | 2000-10-16 | 2002-03-19 | Neil Garcia-Sinclair | Multi-phase bipolar brushless D.C. motor |
| CN101997377A (en) * | 2009-08-11 | 2011-03-30 | 西安磁林电气有限公司 | Multiphase winding permanent magnet brushless direct current motor as well as control method and control circuit thereof |
Non-Patent Citations (1)
| Title |
|---|
| 蒋达: "新型永磁无刷直流电动机建模与仿真研究", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104979990A (en) * | 2015-07-03 | 2015-10-14 | 苏州八方电机科技有限公司 | Permanent magnet brushless direct-current motor base on multi-phase hall sensors |
| CN108705955A (en) * | 2018-04-20 | 2018-10-26 | 江苏理工学院 | A kind of hybrid power synthetic system based on magnetic gear brshless DC motor |
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Application publication date: 20130918 |