CN103580409A - Brushless coil exciting direct-current motor for high-voltage circuit breaker operating mechanism - Google Patents
Brushless coil exciting direct-current motor for high-voltage circuit breaker operating mechanism Download PDFInfo
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- CN103580409A CN103580409A CN201310582246.XA CN201310582246A CN103580409A CN 103580409 A CN103580409 A CN 103580409A CN 201310582246 A CN201310582246 A CN 201310582246A CN 103580409 A CN103580409 A CN 103580409A
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Abstract
The invention discloses a brushless coil exciting direct-current motor for a high-voltage circuit breaker operating mechanism and belongs to the technical field of high-voltage circuit breaker operating mechanisms. According to the brushless coil exciting direct-current motor, the output torque of the motor can be improved to the maximum, and the range of speed can be expanded. The brushless coil exciting direct-current motor comprises a housing. A motor main shaft and two stator and rotor salient pole devices are arranged in the housing, and the two stator and rotor salient pole devices are arrayed in parallel and completely symmetric about the middle vertical plane of the motor main shaft; each stator and rotor salient pole device is composed of a stator core and a rotor core, the motor main shaft is coaxial with the housing, the stator cores are fixed to the inner side walls of the housing, the rotor cores are fixed to the motor main shaft, and air gaps exist between the stator cores and the rotor cores; a winding drum is fixedly arranged on the portion, between the two stator and rotor salient pole devices, of the rotor main shaft, and an exciting coil is wound in the winding drum; grooves are formed in the stator cores, armature windings are wound in the grooves, and the housing and the motor main shaft are made of magnetism-permeable materials.
Description
Technical field
The invention belongs to high-voltage breaker operation mechanism technical field, particularly relate to a kind of brushless coil excitation direct current machine for high-voltage breaker operation mechanism; This direct current machine is mainly used in high pressure and operating mechanism super, ultra high voltage, adapts to the intelligentized operation of switchgear.
Background technology
Primary cut-out is switchgear important in electric power system, has control and protection dual-use function, significant to the safe operation of electric power system.Operating mechanism is the main motion parts of circuit breaker, directly affects the reliability and stability of circuit breaker work.Conventional circuit breaker operating mechanism is mainly electromagnetic operating mechanism, spring operating mechanism, pneumatic operating mechanism and hydraulic actuating mechanism, these operating mechanism complex structures, and moving component is many, and controllability and reliability are not good.Electric operating mechanism moves with a motor direct-drive circuit breaker, has well solved the problems referred to above, and has that simple in structure, electromagnetic force is large, the feature of flexible adjustment, and this is that the rapidity and the controllability that realize breaker operator are laid a good foundation.At present, the drive motors of existing electric operating mechanism adopts permanent magnet DC motor more, adopts the motor of permanent magnet excitation, adopts the motor of permanent magnet excitation to have following shortcoming: motor cost rises; Uncontrollable limited power bracket and the limited speed adjustable range of causing of permanent magnet flux; Degradation under the high speed performance that permanent magnet can be caused by the mechanical strength of assembling between large reverse magnetomotive force and high temperature demagnetization and rotor yoke and permanent magnet.These drawbacks limit its application at aspects such as intelligent operating mechanism such as strong mechanical oscillation, instantaneous starting and braking, the servo-actuated controls of motor, directly affected the performance of breaker operation mechanism.
Summary of the invention
The problem existing for prior art, the invention provides a kind of brushless coil excitation direct current machine for high-voltage breaker operation mechanism.This motor can maximally utilise electromagnetic torque and rotor with salient pole reluctance torque effect to improve motor output torque, to expand velocity interval, and can improve controllability and the functional reliability of motor; In addition, the present invention replaces permanent magnet also effectively to eliminate permanent magnet demagnetization that the factors such as Yin Gaowen, mechanical shock cause and the danger of demagnetization with magnetizing coil, by effectively realizing the regulation and control to permanent magnet flux to the control of magnetizing coil, be convenient to realize motor interior speed governing on a large scale simultaneously.。
To achieve these goals, the present invention adopts following technical scheme, a kind of brushless coil excitation direct current machine for high-voltage breaker operation mechanism, comprise casing, in casing, be provided with electric machine main shaft and two groups of stator and rotor salient pole devices, two groups of stator and rotor salient pole devices be arranged in parallel and full symmetric in the middle vertical planes of electric machine main shaft; Described stator and rotor salient pole device is comprised of stator core and rotor core, described electric machine main shaft and casing coaxially arrange, described stator core is fixed on the madial wall of casing, and rotor core is fixed on electric machine main shaft, between described stator core and rotor core, leaves air gap; On the electric machine main shaft between described two groups of stator and rotor salient pole devices, be fixedly installed reel, in reel, be wound with magnetizing coil; In described stator core, be provided with groove, be wound with armature winding in groove, described casing and electric machine main shaft adopt permeability magnetic material.
Described electric machine main shaft is arranged in casing by end cap, between electric machine main shaft and end cap, is provided with bearing.
Described armature winding adopts individual layer to concentrate the arrangement mode of whole distance.
Beneficial effect of the present invention:
(1) direct current machine of the present invention adopts magnetizing coil, can regulate the working gas gap magnetic of motor close by controlling the direct current passing through in magnetizing coil; Compare common permanent magnet DC motor, this structure makes the traffic coverage of motor become large, scope and the power bracket of speed governing are wider, and then make the electric pressure of operating mechanism application higher, can meet the above peak value opening velocity (6～10m/s) to superhigh pressure grade circuit breaker of 126kV and require and operating work (>4kJ) requirement;
(2) the present invention adopts energization excitation coil to replace the permanent magnet in permanent magnet DC motor to carry out excitation, and stator core and rotor core adopt salient pole type structure, and by regulating exciting curent to control air-gap flux, final raising output torque, widens speed adjustable range; Meanwhile, can avoid that the high speed performance that permanent magnet caused by the mechanical strength of assembling between large reverse magnetomotive force and high temperature demagnetization and rotor yoke and permanent magnet declines, the damage of permanent magnet under high temperature and mechanical shock, improve the reliability of operating mechanism; The rotatable winding of irrotationality and without the rotor core salient pole type structure of permanent magnet can make it work in high engine speed range and high temperature occasion, eliminate the restriction of permanent magnetic material characteristic, without permanent magnet demagnetization risk, and motor cost reduces;
(3) direct current machine of the present invention not only can produce with the field supply that provides brush direct current series motor characteristic and be approximated to the electromagnetic torque of direct ratio, and can produce the reluctance torque that is approximated to direct ratio with the phase current that switched reluctance machines characteristic is provided; Meanwhile, alleviated the quality of rotor core, the advantage such as have that moment of inertia is little, start-up time is short and output torque is large, meets the requirement of circuit-breaker switching on-off operating time.
Accompanying drawing explanation
Fig. 1 is the structural representation that the present invention is applied to high-voltage breaker operation mechanism;
Fig. 2 is the structural representation of the brushless coil excitation direct current machine of high-voltage breaker operation mechanism of the present invention;
Fig. 3 is the A-A cutaway view of Fig. 2;
Fig. 4 is the magnetic flux path schematic diagram of the brushless coil excitation direct current machine of high-voltage breaker operation mechanism of the present invention;
In figure, 1-angular displacement sensor, 2-position signalling transducer, 3-groove, 4-torque sensor, 5-ring flange, 6-rotating shaft, 7-connecting lever, 8-pull bar, 9-moving contact, 10-arc control device, 11-fixed contact, 12-is brushless coil excitation direct current machine, 13-electric machine main shaft, 14-stator core, 15-rotor core, 16-reel, 17-magnetizing coil, 18-end cap, 19-casing, 20-armature winding, 21-stator and rotor salient pole device.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in Figure 2 and Figure 3, a kind of brushless coil excitation direct current machine for high-voltage breaker operation mechanism, comprise casing 19, in casing 19, be provided with that electric machine main shaft 13 and 21, two groups of stator and rotor salient pole devices 21 of two groups of stator and rotor salient pole devices are arranged in parallel and full symmetric in the middle vertical planes of electric machine main shaft 13; Described stator and rotor salient pole device 21 is comprised of stator core 14 and rotor core 15, and described stator core 14 and rotor core 15 adopt salient pole type structure, and the salient pole number of stator core 14 is nine, and the salient pole number of rotor core 15 is six; Described electric machine main shaft 13 coaxially arranges with casing 19, and described stator core 14 is fixed on the madial wall of casing 19, and rotor core 15 is fixed on electric machine main shaft 13, leaves the air gap of 2mm between described stator core 14 and rotor core 15; On the electric machine main shaft 13 between described two groups of stator and rotor salient pole devices 21, be fixedly installed reel 16, in reel 16, be wound with magnetizing coil 17; In described stator core 14, along even circumferential, be provided with nine grooves 3, be wound with armature winding 20 in groove 3, described casing 19 and electric machine main shaft 13 adopt permeability magnetic material.
Described electric machine main shaft 13 is arranged in casing 19 by end cap 18, between electric machine main shaft 13 and end cap 18, is provided with bearing.
Described armature winding 20 adopts individual layer to concentrate the arrangement mode of whole distance.
Below in conjunction with accompanying drawing, a use procedure of the present invention is described.
The magnetic flux path of the brushless coil excitation direct current machine of high-voltage breaker operation mechanism of the present invention, as shown in Figure 4, the rear magnetic flux producing of magnetizing coil 17 energising passes stator core 14 through electric machine main shaft 13 from one end rotor core 15, then to rotor core 15, finally forms closed magnetic circuit after casing 19 passes other end stator core 14.Meanwhile, two ends rotor core 15 forms respectively the N utmost point and the S utmost point, and like this, rotor core 15 induces magnetic field; And the magnetic field interaction producing after switching on the armature winding 20 of stator core 14, thereby drive motors main shaft 13 runnings.Therefore apply adjustable DC electric current forward or backwards in magnetizing coil 17, just can produce the excitatory magnetic potential of different directions and amplitude; This magnetic potential acts on the magnetic field that rotor core 15 induces can produce the effect that increases magnetic or weak magnetic, not only can change the close size of motor gas-gap magnetic, also can coordinate the electric current regulating in armature winding 20 simultaneously, thereby reach adjustable magnetic object, wide in range air-gap flux adjustment amount and the speed control range of final acquisition, can greatly increase the speed adjustable range of motor, improve the dynamic characteristic of motor.Electric machine main shaft 13 has also played the effect of guiding magnetic field.
It is example that the present embodiment be take 126kV vacuum high-pressure circuit breaker, and the requirement according to this high-voltage breaker explosion chamber to operating mechanism drive motors, selects brushless coil excitation direct current machine of the present invention.Brushless coil excitation direct current function of the present invention meets peak electricity magnetic torque (1000Nm-1500Nm) and the peak speed (600r/min-800r/min) of 126kV vacuum high-pressure circuit breaker requirement, be less than 70ms running time, and there is good dynamic characteristic and wide in range speed adjusting performance.
The present invention is applied to the structure of this high-voltage breaker operation mechanism, as shown in Figure 1.The electric machine main shaft 13 of brushless coil excitation direct current machine 12 of the present invention is fixedly connected with the rotating shaft 6 of transmission mechanism by ring flange 5, and one end and the rotating shaft 6 of the connecting lever 7 of transmission mechanism are hinged, and one end of the pull bar 8 of the other end and transmission mechanism is hinged.Under the driving of brushless coil excitation direct current machine 12 electromagnetic forces, connecting lever 7 is 6 rotations around the shaft, and then drive insulated tension pole 8 in the vertical direction motions, finally make moving contact 9 motions in arc control device 10, make moving contact 9 separate or contact with fixed contact 11, realize the breaking-closing operating of circuit breaker.
For the ease of to the detection of direct-current electric motor performance of the present invention with realize to control the present invention, can be in the present invention installation site signal transducer 2, angular displacement sensor 1 and torque sensor 4.Described position signalling transducer 2 is arranged on casing 19, and angular displacement sensor 1 is arranged on electric machine main shaft 13, and torque sensor 4 is arranged between electric machine main shaft 13 and ring flange 5.
The structure of direct current machine of the present invention is similar to switched reluctance machines to a certain extent, but the combination of the number of poles of its stator core and rotor core is completely different from switched reluctance machines with their layout, equitant region, the number of phases that can encourage and conversion etc. simultaneously, its electromagnetic property and modulating properties are better, are applicable to the requirements such as circuit breaker instantaneous starting, short-term operation.
Claims (3)
1. the brushless coil excitation direct current machine for high-voltage breaker operation mechanism, it is characterized in that comprising casing, in casing, be provided with electric machine main shaft and two groups of stator and rotor salient pole devices, two groups of stator and rotor salient pole devices be arranged in parallel and full symmetric in the middle vertical planes of electric machine main shaft; Described stator and rotor salient pole device is comprised of stator core and rotor core, described electric machine main shaft and casing coaxially arrange, described stator core is fixed on the madial wall of casing, and rotor core is fixed on electric machine main shaft, between described stator core and rotor core, leaves air gap; On the electric machine main shaft between described two groups of stator and rotor salient pole devices, be fixedly installed reel, in reel, be wound with magnetizing coil; In described stator core, be provided with groove, be wound with armature winding in groove, described casing and electric machine main shaft adopt permeability magnetic material.
2. the brushless coil excitation direct current machine for high-voltage breaker operation mechanism according to claim 1, is characterized in that described electric machine main shaft is arranged in casing by end cap, is provided with bearing between electric machine main shaft and end cap.
3. the brushless coil excitation direct current machine for high-voltage breaker operation mechanism according to claim 1, is characterized in that described armature winding adopts individual layer to concentrate the arrangement mode of whole distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310582246.XA CN103580409A (en) | 2013-11-18 | 2013-11-18 | Brushless coil exciting direct-current motor for high-voltage circuit breaker operating mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310582246.XA CN103580409A (en) | 2013-11-18 | 2013-11-18 | Brushless coil exciting direct-current motor for high-voltage circuit breaker operating mechanism |
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| CN103580409A true CN103580409A (en) | 2014-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310582246.XA Pending CN103580409A (en) | 2013-11-18 | 2013-11-18 | Brushless coil exciting direct-current motor for high-voltage circuit breaker operating mechanism |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104881524A (en) * | 2015-05-13 | 2015-09-02 | 徐纪法 | Software for calculating magnetic parameter of double-source magnetic circuit |
| CN111884454A (en) * | 2020-08-10 | 2020-11-03 | 清华大学 | Axial flux permanent magnet motor for high-voltage circuit breaker and used for high-voltage circuit breaker |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1241061A (en) * | 1999-06-09 | 2000-01-12 | 南京航空航天大学 | Brushless DC electric generator with dual salient poles |
| CN102035270A (en) * | 2010-12-17 | 2011-04-27 | 南京航空航天大学 | Axial excitation double salient pole motors |
| CN203118848U (en) * | 2013-03-19 | 2013-08-07 | 南京因泰莱配电自动化设备有限公司 | High voltage circuit breaker operating mechanism driven based on permanent magnet brushless direct current motor |
| CN203562915U (en) * | 2013-11-18 | 2014-04-23 | 沈阳工业大学 | DC coil-excitation-based brushless motor for operating mechanism of high-voltage breaker |
-
2013
- 2013-11-18 CN CN201310582246.XA patent/CN103580409A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1241061A (en) * | 1999-06-09 | 2000-01-12 | 南京航空航天大学 | Brushless DC electric generator with dual salient poles |
| CN102035270A (en) * | 2010-12-17 | 2011-04-27 | 南京航空航天大学 | Axial excitation double salient pole motors |
| CN203118848U (en) * | 2013-03-19 | 2013-08-07 | 南京因泰莱配电自动化设备有限公司 | High voltage circuit breaker operating mechanism driven based on permanent magnet brushless direct current motor |
| CN203562915U (en) * | 2013-11-18 | 2014-04-23 | 沈阳工业大学 | DC coil-excitation-based brushless motor for operating mechanism of high-voltage breaker |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104881524A (en) * | 2015-05-13 | 2015-09-02 | 徐纪法 | Software for calculating magnetic parameter of double-source magnetic circuit |
| CN111884454A (en) * | 2020-08-10 | 2020-11-03 | 清华大学 | Axial flux permanent magnet motor for high-voltage circuit breaker and used for high-voltage circuit breaker |
| CN111884454B (en) * | 2020-08-10 | 2021-10-26 | 清华大学 | Axial flux permanent magnet motor for high-voltage circuit breaker and used for high-voltage circuit breaker |
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Application publication date: 20140212 |