CN2731815Y - Wide speed regulating, double salient pole mixed exciting brushless dynamo - Google Patents
Wide speed regulating, double salient pole mixed exciting brushless dynamo Download PDFInfo
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- CN2731815Y CN2731815Y CN 200420080047 CN200420080047U CN2731815Y CN 2731815 Y CN2731815 Y CN 2731815Y CN 200420080047 CN200420080047 CN 200420080047 CN 200420080047 U CN200420080047 U CN 200420080047U CN 2731815 Y CN2731815 Y CN 2731815Y
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- permanent magnet
- dynamo
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- motor
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Abstract
The utility model relates to a wide speed regulating, double salient pole mixed exciting brushless dynamo, which is a double salient pole brushless dynamo suitable to be used in the application of running required variable speed in wide range of electric vehicles, etc. The utility model has the structure of that a direct current exciting coil (4) is provided between armature windings (5) of the stator (2) of the double salient pole mixed exciting dynamo, a permanent magnet (7) is provided corresponding to the outer side of the direct current exciting coil (4), a magnetic conduction bridge (6) is provided between the direct current exciting coil (4) and the permanent magnet (7) and the direction of the magnetic field of the permanent magnet (7) is along the circumferencial direction of the dynamo. The mode of the weak magnetism control adopts the mixed exciting mode of combining the permanent magnet exciting and the electricity exciting to proceeding the stepless magnetism control to the double salient pole mixed exciting dynamo and uses smaller electricity exciting to increase the speed regulating range of the dynamo.
Description
Technical field
The utility model is a kind of needs such as electric motor car double salient pole permanent magnet brushless motor of the application scenario of variable-speed operation on a large scale that is suitable for, and belongs to the technical field that the doubly-salient brushless motor is made.
Technical background
At the beginning of the nineties, people such as U.S. motor expert T.A.Lipo are at the deficiency of switched reluctance machines, install the modern high performance permanent magnet additional on the stator of switched reluctance machines or rotor, have formed a kind of brand-new motor-doubly salient permanent magnet motor.Existing result of study shows advantages such as double salient-pole electric machine has the power density height, and is simple in structure, that fault freedom good, control is flexible.Yet because the inherent characteristic of permanent magnetic material, the excitation of doubly salient permanent magnet motor can't be regulated, and is restricted in the application of the occasion that drives such as need wide range speed controls such as electric automobiles, so magnetic control system is one of application difficult point of doubly salient permanent magnet motor a little less than the permanent power.
In order to improve the range of speeds of double salient-pole electric machine, successively there is the people propose the magnetic field that four kinds of schemes weaken doubly salient permanent magnet motor both at home and abroad, reach the purpose of the weak magnetic control system of permanent power.First kind of scheme is to adopt mechanical means that permanent magnet is pulled out from stator core, and to weaken permanent magnetic field, principle is seen Fig. 1.Second kind of scheme be in the stator outside with two magnetic conductors, with the direct short-circuit of permanent magnet two ends, permanent magnet flux is passed through from this magnetic conductor, thereby reduces the permanent magnet flux in the every phase winding of armature and the air-gap flux of motor, principle is seen Fig. 2.The third scheme is to adopt the wide range speed control doubly salient permanent magnet motor of multistage tap winding, and this motor has obtained Chinese invention patent at present, and the patent No. is (ZL98111107.6).Be with the centralized winding with multistage tap on this kind motor stator, what and the pairing umber of turn of each grade tap of tap can require to decide according to speed adjustable range.This motor is when low cruise, every phase winding has the more number of turn, rising along with rotating speed, switching by tap, every phase winding number of turn is reduced, the also proportional minimizing of the back-emf that permanent magnetic field produces in every phase winding, winding inductance descends by quadratic relationship, winding current increases, thereby the permanent power range of speeds of motor is increased.The 4th kind of scheme is to adopt electric excitation biconvex electrode electric machine, by regulating the DC excitation electric current, can realize the control to air-gap field.
Preceding two kinds of schemes all belong to mechanical type, need specific purpose tool, operating difficulties.Must guarantee also that in first kind of scheme the permanent magnetism physical efficiency is free to slide in iron core, both increase additional air gap, also make and make and install complexity more, preceding two kinds of scheme shortcomings are apparent, and practical value is little.Scheme three is simple in structure, and control is convenient, has certain practicality, but in motor wide range speed control running, want the frequent switching controls number of turn, to occur bigger voltage, the rate of change of electric current in the armature winding, and need special afterflow or energy feedback circuit, controlling cost increases relatively.Owing to do not adopt high performance permanent magnet, only adopt DC excitation in the scheme four, excitation loss increases, and efficiency of motor also will be under some influence.
Summary of the invention
Technical problem: the utility model purpose provides a kind of wide governing, double salient pole, mixed excitation brushless dynamo, the weak magnetic energy power of this motor is stronger, electric efficiency improves, and has broad constant-power speed regulation scope, and being particularly suitable for electric motor car etc. needs the application scenario of variable-speed operation on a large scale.
Technical scheme: the structure of wide governing, double salient pole, mixed excitation brushless dynamo of the present utility model is to be provided with direct-flow magnet exciting coil between the armature winding on the stator of doubly salient permanent magnet motor, the permanent magnet that is provided with in the outside of direct-flow magnet exciting coil correspondence, be provided with the magnetic conduction bridge between direct-flow magnet exciting coil and permanent magnet, the magnetic direction of permanent magnet is the circumferencial direction along motor.Direct-flow magnet exciting coil has two pairs or more, and is corresponding with permanent magnet quantity, is evenly distributed on the stator of double salient-pole electric machine.
Beneficial effect:
1. the composite excitation magnetic field of the electric excitation winding generation on permanent magnet on the motor stator and the stator is superposition in air gap, acting in conjunction forms the main field of motor, because the existence of electricity excitation magnetic field makes that air-gap field is not only level and smooth adjustable but also adjustable range is very big, can transfer to zero from the twice magnetic field of permanent magnet, make this motor have broad constant-power speed regulation scope.
2. another advantage of the present utility model is the introducing of magnetic conduction bridge, the stator core of motor can be kept perfectly, no longer be divided into many lobes, and encourage the path that provides extra for electromagnetism, make the magnetic resistance in electricity excitation magnetic field loop reduce greatly, can produce bigger degaussing magnetic flux with less excitation magnetic potential, weak magnetic energy power is stronger, and electric efficiency improves.
3. by the size and Orientation of the electric exciting current of control, not only can carry out weak magnetic control system, can also increase magnetic control system, satisfy the requirement of load low speed high torque.
4. the control of the coordination by electric exciting current and armature supply can be carried out online efficiency optimization to motor, realizes that optimum efficiency distributes, and being particularly suitable for electric motor car etc. needs the application scenario of variable-speed operation on a large scale.
The utility model has the advantages that and adopt high-performance permanent magnet and DC excitation winding in motor gas-gap, to form the composite excitation method in magnetic field jointly, in double-convex pole hybrid excitation motor, introduced the magnetic conduction bridge first, it is big to make the mixed excitation bisalient-pole permanent-magnet motor both inherit the power density of doubly salient permanent magnet motor, control advantages such as flexible, efficiently solve simultaneously doubly salient permanent magnet motor again and be difficult to realize weak magnetic control system, the deficiency that the constant-power speed regulation scope is less, make motor have the broad permanent power range of speeds, suitable electric automobile etc. need frequent starting, quicken, high-speed cruising, application scenarios such as minimizing and parking.Have certain scientific research and value.
Description of drawings
Fig. 1 is the structural representation of the weak magnetic doubly salient permanent magnet motor of mechanical type of prior art.
Fig. 2 is the structural representation of doubly salient permanent magnet motor of the band stator flux sleeve yoke of prior art.
Fig. 3 is the schematic cross-section of 12/8 utmost point double-convex pole hybrid excitation motor of the present utility model.
Fig. 4 is the equivalent magnetic circuit schematic diagram of motor when zero load of 12/8 utmost point double-convex pole hybrid excitation motor.
Embodiment
The utility model is on the basis of high-performance doubly salient permanent magnet motor, the method of the composite excitation that employing permanent magnet excitation and electric excitation combine is carried out stepless weak magnetic control system to motor, with the speed adjustable range of less electric excitation increase motor, further to widen the scope of application of doubly salient permanent magnet motor.
A special winding (DC excitation winding) is placed in the perpendicular position of the magnetic field axis that produces with stator permanent magnet on the double salient-pole electric machine stator, when the feeding magnetic direction that direct current produced is opposite with the permanent magnetic field direction in this excitation winding, can realize the weak magnetic control system of doubly salient permanent magnet motor.Between the permanent magnet of motor and this excitation winding, be provided with the magnetic conduction bridge especially, make electric machine stator iron keep an integral body on the one hand, provide a path for the DC excitation magnetic flux on the other hand, the analysis showed that, just because of creatively introducing the magnetic conduction bridge, for the DC excitation winding provides extra magnetic circuit, strengthened the weak magnetic function of DC excitation winding effectively, promptly can obtain bigger weak magnetic energy power with less DC excitation magnetic potential.Its concrete structure is to be provided with direct-flow magnet exciting coil 4 between the armature winding 5 on the stator 2 of doubly salient permanent magnet motor, be provided with permanent magnet 7 in the outside of direct-flow magnet exciting coil 4 correspondence, be provided with magnetic conduction bridge 6 between direct-flow magnet exciting coil 4 and permanent magnet 7, the magnetic direction of permanent magnet 7 is the circumferencial direction along motor.Direct-flow magnet exciting coil 4 has two pairs or more, is evenly distributed on the stator 2 of doubly salient permanent magnet motor.
With one 12/8 utmost point doubly salient permanent magnet motor is example, and there are 12 equally distributed teeth in its cross section as shown in Figure 3 on the stator, 8 equally distributed teeth are arranged on the rotor.The silicon steel sheet that with thickness is 0.5mm is washed into stator punching and rotor punching by shape shown in Figure 3, punching with capacity laminates into stator core and rotor core, in stator core, arrange 4 permanent magnets, and in the stator slot adjacent, place direct-flow magnet exciting coil with permanent magnet.Coil of cover on each stator tooth is in coil on the same position tooth of space through being in series or in parallel to form a phase winding, and the coil on 12 stator tooths is formed the threephase armature winding altogether.
Below be a rated power P
N=750W, rated speed n
N=1500rpm, rated voltage 48V, the main design data of the 12/8 pole, mixed excitation double salient-pole electric machine of rated current 6.5A:
Diameter of stator bore: 75mm, the silicon steel sheet lamination is long: 75mm, air gap is long: 0.45mm, 20 ° of stator polar arcs, stator is high: 15mm, rotor is high: 9mm, every phase winding number of turn is: 260 circles, magnet size is: 75mm * 18.5mm * 4mm, the DC excitation umber of turn is: 80 circles.The thick silicon steel plate stacking of 0.5mm that is is all adopted in the rotor punching.
Claims (2)
1, a kind of wide governing, double salient pole, mixed excitation brushless dynamo, it is characterized in that being provided with direct-flow magnet exciting coil (4) between the armature winding (5) on the stator (2) at doubly salient permanent magnet motor, be provided with permanent magnet (7) in the outside correspondence of direct-flow magnet exciting coil (4), be provided with magnetic conduction bridge (6) between direct-flow magnet exciting coil (4) and permanent magnet (7), the magnetic direction of permanent magnet (7) is the circumferencial direction along motor.
2, wide governing, double salient pole, mixed excitation brushless dynamo according to claim 1 is characterized in that direct-flow magnet exciting coil (4) has two pairs or more, is evenly distributed on the stator (2) of doubly salient permanent magnet motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420080047 CN2731815Y (en) | 2004-10-10 | 2004-10-10 | Wide speed regulating, double salient pole mixed exciting brushless dynamo |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420080047 CN2731815Y (en) | 2004-10-10 | 2004-10-10 | Wide speed regulating, double salient pole mixed exciting brushless dynamo |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2731815Y true CN2731815Y (en) | 2005-10-05 |
Family
ID=35052129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420080047 Expired - Lifetime CN2731815Y (en) | 2004-10-10 | 2004-10-10 | Wide speed regulating, double salient pole mixed exciting brushless dynamo |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2731815Y (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100438280C (en) * | 2006-08-23 | 2008-11-26 | 南京航空航天大学 | Tangential magnetic steel double-convex pole hybrid excitation motor |
| CN101471589A (en) * | 2007-12-20 | 2009-07-01 | 三星电子株式会社 | Brushless motor |
| CN105281524A (en) * | 2015-10-23 | 2016-01-27 | 易事特集团股份有限公司 | Brushless double-fed motor |
| CN107026550A (en) * | 2017-05-19 | 2017-08-08 | 北京航空航天大学 | A kind of Hybrid Excitation Switched Reluctance Motor |
| CN107070014A (en) * | 2017-05-08 | 2017-08-18 | 史立伟 | A kind of composite excitation servomotor |
| CN107070156A (en) * | 2017-05-08 | 2017-08-18 | 史立伟 | A kind of attached brushless DC motor of electric vehicle |
| CN107968614A (en) * | 2017-12-18 | 2018-04-27 | 远景能源（江苏）有限公司 | Demagnetization guard method applied to magneto |
| CN109412282A (en) * | 2018-10-31 | 2019-03-01 | 山东理工大学 | A kind of multiphase fault-tolerant magneto |
| CN110311522A (en) * | 2019-07-15 | 2019-10-08 | 南京航空航天大学 | A kind of four symmetrical electric excitation biconvex electrode electric machines |
| CN110518765A (en) * | 2019-08-30 | 2019-11-29 | 沈阳工业大学 | A kind of claw type stator yoke insertion permanent magnet auxiliary birotor axial direction double salient-pole electric machine |
| CN112542904A (en) * | 2020-12-16 | 2021-03-23 | 哈尔滨理工大学 | Novel mixed excitation motor stator structure |
-
2004
- 2004-10-10 CN CN 200420080047 patent/CN2731815Y/en not_active Expired - Lifetime
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100438280C (en) * | 2006-08-23 | 2008-11-26 | 南京航空航天大学 | Tangential magnetic steel double-convex pole hybrid excitation motor |
| CN101471589A (en) * | 2007-12-20 | 2009-07-01 | 三星电子株式会社 | Brushless motor |
| CN101471589B (en) * | 2007-12-20 | 2013-04-03 | 三星电子株式会社 | Brushless motor |
| CN105281524A (en) * | 2015-10-23 | 2016-01-27 | 易事特集团股份有限公司 | Brushless double-fed motor |
| CN105281524B (en) * | 2015-10-23 | 2018-06-19 | 易事特集团股份有限公司 | A kind of brushless dual-feed motor |
| CN107070156A (en) * | 2017-05-08 | 2017-08-18 | 史立伟 | A kind of attached brushless DC motor of electric vehicle |
| CN107070014A (en) * | 2017-05-08 | 2017-08-18 | 史立伟 | A kind of composite excitation servomotor |
| CN107026550A (en) * | 2017-05-19 | 2017-08-08 | 北京航空航天大学 | A kind of Hybrid Excitation Switched Reluctance Motor |
| CN107026550B (en) * | 2017-05-19 | 2019-07-02 | 北京航空航天大学 | A kind of Hybrid Excitation Switched Reluctance Motor |
| CN107968614A (en) * | 2017-12-18 | 2018-04-27 | 远景能源（江苏）有限公司 | Demagnetization guard method applied to magneto |
| CN109412282A (en) * | 2018-10-31 | 2019-03-01 | 山东理工大学 | A kind of multiphase fault-tolerant magneto |
| CN110311522A (en) * | 2019-07-15 | 2019-10-08 | 南京航空航天大学 | A kind of four symmetrical electric excitation biconvex electrode electric machines |
| CN110311522B (en) * | 2019-07-15 | 2021-11-23 | 南京航空航天大学 | Four-phase symmetric electro-magnetic doubly salient motor |
| CN110518765A (en) * | 2019-08-30 | 2019-11-29 | 沈阳工业大学 | A kind of claw type stator yoke insertion permanent magnet auxiliary birotor axial direction double salient-pole electric machine |
| CN112542904A (en) * | 2020-12-16 | 2021-03-23 | 哈尔滨理工大学 | Novel mixed excitation motor stator structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20041010 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |