CN102157310B - Linear permanent magnet motor operating mechanism of high-voltage circuit breaker - Google Patents
Linear permanent magnet motor operating mechanism of high-voltage circuit breaker Download PDFInfo
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- CN102157310B CN102157310B CN 201110099051 CN201110099051A CN102157310B CN 102157310 B CN102157310 B CN 102157310B CN 201110099051 CN201110099051 CN 201110099051 CN 201110099051 A CN201110099051 A CN 201110099051A CN 102157310 B CN102157310 B CN 102157310B
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Abstract
The invention relates to a linear permanent magnet motor operating mechanism of a high-voltage circuit breaker, comprising a stator core, a rotor core, drive rods and permanent magnets, wherein the stator core is a box body; the rotor core is arranged in the stator core; the drive rods arranged on both ends of the rotor core penetrate through shells positioned on the upper and the lower ends of the rotor core and can move up and down; the side wall of the stator core is provided with the permanent magnets; upper and lower adjacent permanent magnets are opposite in polarity; the permanent magnets positioned on the left and the right edges of the box body are same in polarity placement directions; stator salient poles with the number of integral multiples of a phase number are arranged on the inner side wall of the stator core and between the two adjacent permanents and are provided with armature coils; the outer side wall of the rotor core is provided with rotor salient poles; when the rotor core is positioned on a highest position, the stator salient pole positioned on the uppermost end of the stator core just faces to the rotor salient poles; and when the rotor core is positioned on a lowest position, the stator salient pole positioned on the lowest end of the stator core just faces to the rotor salient poles.
Description
Technical field
The invention belongs to switchgear technical field in the electro-engineering, be specifically related to a kind of operation mechanism of linear permanent magnet motor of primary cut-out.
Background technology
The operating mechanism of traditional primary cut-out configuration mainly contains hydraulic mechanism, pneumatic mechanism, spring mechanism and electromagnetic mechanism.Hydraulic operating mechanism has a series of advantages such as energy intensity is large, reaction speed is fast, noise is low, reliable in action, and pneumatic operating mechanism utilizes compressed air to produce thrust as the energy, does not need powerful DC power supply, does not also need to lay control cables.Pneumatic, hydraulic system can satisfy long stroke, powerful operational requirements, be mainly used in the higher primary cut-out of electric pressure, but system complex, reliability is not high enough, the hydraulic operating mechanism processing technology requires high, if make or assemble bad easy generation leakage of oil, its speed characteristics are subject to the impact of ambient temperature, compressed-air actuated quality has important impact to the reliability of pneumatic operating mechanism work, and a denier air makes moist and can make piston and casing surface corrosion.Spring operating mechanism is that the energy release that relies on spring to store makes breaker closing, be not subjected to the impact of Changes in weather and change in voltage its operate time, guaranteed the reliability of combined floodgate performance, working stability and closing speed are very fast, but output force characteristics cooperates relatively poor with the circuit breaker load characteristic, parts are many, and manufacturing process is complicated, causes easily mechanical breakdown.Electromagnetic operating mechanism is simple in structure, fast response time, but exist driving power larger, and contact force is less and cause easily the problem such as contact bounce when closing a floodgate.Primary cut-out operational requirements high-power, long stroke that spring and electromagnetic operating mechanism also can't satisfy is mainly used in the Low Voltage Circuit Breaker at present.
The permanent-magnet operating mechanism of development be to be provided by electronically controlled solenoid to close a floodgate or the required energy complete operation of separating brake, and the permanent magnet magnetic force of utility excellence makes switch remain on combined floodgate or open position in recent years.Because simple in structure, amount of parts is few, reliability is high, operation lifetime is long, action dispersiveness is little, the load characteristic of power producing characteristics and vacuum interrupter is complementary etc., the permanent magnetic actuator vacuum circuit breaker technology has obtained development at full speed in recent years, now has been widely used on the vacuum circuit-breaker of 12kV, 24kV and 40.5kV electric pressure.Although permanent-magnet manipulating mechanism has obtained popularization in the vacuum circuit-breaker of middle low-voltage-grade, but the 72.5kV that produces both at home and abroad and the above equal adapted traditional operation of high-pressure vacuum breaker mechanism not yet see the application of relevant voltage levels permanent-magnet operating mechanism both at home and abroad and report.The high voltage vacuum interrupter clearance between open contacts is large, and the moving contact movement travel is long, needs higher separating brake and closing speed.For permanent-magnet operating mechanism, if the movement travel of armature is long, then need larger operating work, this needs more jumbo energy storage capacitor and more powerful power electronic device.On structure, the separating brake of permanent-magnet operating mechanism and closing coil are placed in respectively near separating brake and the combined floodgate working gas gap.In the separating brake process, moving iron core is positioned at closing position at first, and separating brake side air-gap reluctance is large, and switching winding can not play a role effectively.When moving iron core moved to open position, the action effect of switching winding was the strongest, and the collision impact during moving closure unshakable in one's determination is large.Making process is also like this.Movement travel is longer, and it is further outstanding that pick-up current increase, the contact transfer time that this excitation mode brings increases the drawbacks such as the collision impact that reaches when moving the iron core closure is large.
At present, rise to national strategy along with building intelligent grid strong, high flexible, the reliability of raising vacuum circuit-breaker, the demand of controllability become more urgent.Therefore, reforming the operating mechanism of vacuum circuit-breaker, further improve the performance of permanent-magnet operating mechanism, promote the application of permanent-magnet operating mechanism in intelligent vacuum circuit-breaker, is an important goal of switch industry.
Summary of the invention
Technical problem:It is shorter to the present invention is directed to traditional electromagnetism, spring and permanent magnet mechanism stroke, be difficult to satisfy the long stroke breaking-closing operating requirement of primary cut-out, the problem that reliable breaking-closing operating is difficult to guarantee, a kind of operation mechanism of linear permanent magnet motor of long stroke is provided, under the condition of the certain electromagnetism actuating force of output, satisfy the breaking-closing operating requirement of long stroke primary cut-out.
Technical scheme:Operation mechanism of linear permanent magnet motor of the present invention, comprise stator core, mover core, drive rod, permanent magnet, described stator core is casing, described mover core places stator core, and the drive rod that is arranged at the mover core two ends passes up and down two ends housing and can moving up and down of stator core, is provided with permanent magnet on the stator core sidewall, the polarity of two adjacent permanent magnets is relative up and down, and the permanent magnet polarity arranged direction of casing the right and left is identical; On the madial wall of stator core, be provided with the stator salient poles that quantity is the integral multiple of number of phases between the two adjacent permanent magnets, be provided with armature coil on the described stator salient poles; The mover core lateral wall is provided with the mover salient pole, when mover core is in highest order, stator core topmost stator salient poles and the mover salient pole over against, when mover core is in lowest order, stator core bottom stator salient poles and the mover salient pole over against.
The electromagnetic force that the present invention produces by armature coil realizes the motion of mover core, and when mover core was in highest order or lowest order, the location torque that produces by permanent magnet was realized the location of mover core and spacing.
Armature coil of the present invention is centralized armature coil.Described armature coil is composed in series the polyphase armature winding, about being specially two over against armature coil series connection be one group, when number of phases is three, the armature coil of each group series connection is connected with another group coil of two stator salient poles of being separated by, when number of phases was four, the armature coil of each group series connection was connected with another group coil of three stator salient poles of being separated by.
Described armature coil can be electrically connected with inverter, by inverter regulating winding electric current, thus control divide-shut brake speed.
Described stator core, mover core adopt permeability magnetic material to make, and drive rod adopts non-magnet material to make.
Beneficial effect:The present invention is arranged at permanent magnet and armature coil in the stator core simultaneously, with traditional way as armature coil being placed stator core, permanent magnet place mover core, perhaps permanent magnet is placed stator core, armature coil to place mover core to compare, mover core is simple in structure, firm, on the mover without permanent magnet, without winding, without slip ring, mover torque ratio of inertias is large, reaction is fast, is beneficial to quick acting switching-off and the arc extinguishing of realizing vacuum circuit-breaker.
Without permanent magnet, reduce permanent magnet because elliptical gear causes the risk of irreversible demagnetization on the mover core of the present invention, improved reliability and the working life of operating mechanism.
Permanent magnet of the present invention is positioned at the stator core sidewall, lays the centralized armature coil on the stator salient poles, and a plurality of armature coils form the polyphase armature winding after series connection, thereby obtains comparatively stably output torque.
The heterogeneous double-salient-pole structure of permanent-magnetism linear motor of the present invention has poly-magnetic effect, has increased the magnetic density of machine operation air gap, thus Effective Raise the torque density of motor operation mechanism.
The present invention adopts the centralized armature coil to reduce tip lengths, is conducive to reduce armature resistance, improves the motor operation mechanic efficiency.
Armature coil of the present invention can be electrically connected with inverter, can be according to the spring load characteristic of primary cut-out, by inverter regulating winding electric current, control targetedly the divide-shut brake speed characteristics, comprise the control of divide-shut brake end of a period stage deceleration, quick just minute control etc., thereby improve the controllability of primary cut-out.
Permanent-magnetism linear motor operating mechanism stroke of the present invention is large, can satisfy to the full extent the operating characteristic requirement of high-pressure vacuum breaker, reaches closing rebound and minimizes, and improves the operating mechanism overall mechanical properties.
Description of drawings
Fig. 1 is planar structure schematic diagram of the present invention, and Fig. 2 is three-dimensional structure diagram of the present invention, and Fig. 3 is closing position schematic diagram of the present invention, and Fig. 4 is open position schematic diagram of the present invention.
Have among the figure: armature coil 1, permanent magnet 2, mover core 3, stator core 4, stator salient poles 5, mover salient pole 6, drive rod 7, stator core sidewall 9.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
As seen from Figure 1, a kind of operation mechanism of linear permanent magnet motor of primary cut-out, comprise stator core 4, mover core 3, drive rod 7, permanent magnet 2, described stator core 4 is casing, described mover core 3 places stator core 4, the drive rod 7 that is arranged at mover core 3 two ends passes stator core 4 two ends housings and also can move up and down, be provided with permanent magnet 2 on stator core 4 sidewalls, the polarity of two adjacent permanent magnets is relative up and down, and the polarity of the face that namely neighbouring permanent magnet is relative is identical, as shown in fig. 1, the N of neighbouring permanent magnet is extremely to the N utmost point, and S is extremely to the S utmost point, and the permanent magnet polarity arranged direction of casing the right and left is identical.The polarity of permanent magnet can be shown in Figure 1 putting in order among the present invention, and namely a permanent magnet N utmost point of the top also can be put in order opposite with Fig. 1 upwards, and namely the S utmost point upwards needs only the polarity of two adjacent permanent magnets about satisfying relatively.On the madial wall of stator core 4, being provided with quantity between the two adjacent permanent magnets is the stator salient poles 5 of the integral multiple of number of phases, be provided with centralized armature coil 1 on the described stator salient poles, as shown in the figure, lay altogether 12 centralized armature coils on 12 stator salient poles, 4 coils of every phase form the threephase armature winding after series connection, be specially: about two over against armature coil series connection be one group, when number of phases is three, the armature coil of each group series connection is connected with another group coil of two stator salient poles of being separated by, when number of phases was four, the armature coil of each group series connection was connected with another group coil of three stator salient poles of being separated by.Mover core 3 lateral walls are provided with the mover salient pole, when the present invention is in closing position, mover core is positioned at the top in stator core space, stator salient poles topmost and mover salient pole fully over against, the static confining force that this moment, permanent magnet produced is maximum, so that mover core remains on closing position; When the present invention was in open position, mover core was positioned at the stator core space bottom, stator salient poles bottom and mover salient pole fully over against, the static confining force that this moment, permanent magnet produced is maximum, so that mover core remains on open position.
Claims (3)
1. the operation mechanism of linear permanent magnet motor of a primary cut-out, it is characterized in that, this operating mechanism comprises stator core (4), mover core (3), drive rod (7), permanent magnet (2), described stator core (4) is casing, described mover core (3) places stator core (4), the drive rod (7) that is arranged at mover core (3) two ends passes up and down two ends housing and can moving up and down of stator core (4), be provided with permanent magnet (2) on stator core (4) the right and left sidewall, the polarity of two adjacent permanent magnets (2) is relative up and down, and the permanent magnet that arranges on the right and left sidewall (2) polarity arrangement direction is identical;
On the madial wall of stator core (4), be provided with the stator salient poles that quantity is the integral multiple of number of phases (5) between the two adjacent permanent magnets, be provided with armature coil (1) on the described stator salient poles;
Mover core (3) lateral wall is provided with the mover salient pole, when mover core is in highest order, stator core (4) topmost stator salient poles and the mover salient pole over against, when mover core is in lowest order, stator core (4) bottom stator salient poles and the mover salient pole over against.
2. the operation mechanism of linear permanent magnet motor of primary cut-out according to claim 1 is characterized in that, described armature coil is centralized armature coil, and described armature coil is composed in series the polyphase armature winding.
3. the operation mechanism of linear permanent magnet motor of primary cut-out according to claim 2 is characterized in that, described stator core (4), mover core (3) adopt permeability magnetic material to make, and drive rod (7) adopts non-magnet material to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110099051 CN102157310B (en) | 2011-04-20 | 2011-04-20 | Linear permanent magnet motor operating mechanism of high-voltage circuit breaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110099051 CN102157310B (en) | 2011-04-20 | 2011-04-20 | Linear permanent magnet motor operating mechanism of high-voltage circuit breaker |
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| Publication Number | Publication Date |
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| CN102157310A CN102157310A (en) | 2011-08-17 |
| CN102157310B true CN102157310B (en) | 2013-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110099051 Expired - Fee Related CN102157310B (en) | 2011-04-20 | 2011-04-20 | Linear permanent magnet motor operating mechanism of high-voltage circuit breaker |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9083227B2 (en) | 2011-09-09 | 2015-07-14 | Asml Holding N.V. | Linear motor and lithography arrangement including linear motor |
| CN109899338A (en) * | 2019-03-29 | 2019-06-18 | 南京工业职业技术学院 | One kind firing-Electromagnetic heating driving bouncing mechanism |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5440183A (en) * | 1991-07-12 | 1995-08-08 | Denne Developments, Ltd. | Electromagnetic apparatus for producing linear motion |
| CN101459012A (en) * | 2008-12-26 | 2009-06-17 | 沈阳工业大学 | Permanent magnet linear motor operation mechanism for high voltage circuit breaker |
| CN101499707A (en) * | 2009-02-23 | 2009-08-05 | 东南大学 | Primary permanent magnet type linear motor for urban railway traffic |
| CN101789676A (en) * | 2010-03-10 | 2010-07-28 | 江苏大学 | Fault-tolerance permanent magnet linear motor |
| CN101860174A (en) * | 2010-05-12 | 2010-10-13 | 东南大学 | Complementary type modularization permanent-magnetism linear motor and motor die set formed by same |
| CN102005895A (en) * | 2010-12-20 | 2011-04-06 | 东南大学 | Permanent magnet linear motor with clamping function |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201975280U (en) * | 2011-04-20 | 2011-09-14 | 东南大学 | Operation mechanism of linear permanent magnet motor |
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- 2011-04-20 CN CN 201110099051 patent/CN102157310B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5440183A (en) * | 1991-07-12 | 1995-08-08 | Denne Developments, Ltd. | Electromagnetic apparatus for producing linear motion |
| CN101459012A (en) * | 2008-12-26 | 2009-06-17 | 沈阳工业大学 | Permanent magnet linear motor operation mechanism for high voltage circuit breaker |
| CN101499707A (en) * | 2009-02-23 | 2009-08-05 | 东南大学 | Primary permanent magnet type linear motor for urban railway traffic |
| CN101789676A (en) * | 2010-03-10 | 2010-07-28 | 江苏大学 | Fault-tolerance permanent magnet linear motor |
| CN101860174A (en) * | 2010-05-12 | 2010-10-13 | 东南大学 | Complementary type modularization permanent-magnetism linear motor and motor die set formed by same |
| CN102005895A (en) * | 2010-12-20 | 2011-04-06 | 东南大学 | Permanent magnet linear motor with clamping function |
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