CN2877124Y - DC electric machine - Google Patents
DC electric machine Download PDFInfo
- Publication number
- CN2877124Y CN2877124Y CN 200520006677 CN200520006677U CN2877124Y CN 2877124 Y CN2877124 Y CN 2877124Y CN 200520006677 CN200520006677 CN 200520006677 CN 200520006677 U CN200520006677 U CN 200520006677U CN 2877124 Y CN2877124 Y CN 2877124Y
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- magnetic pole
- motor
- rotor
- permanent magnet
- magnetic
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Abstract
A direct current motor comprises a rotor, a stator, a brush reversing device fitted on a rotary shaft of the rotor, a plurality of pairs of magnetic poles fitted on the stator. Said rotor is further provided with an armature winding in its iron core. The magnetic pole is combined by permanent magnet and exciting winding. Based on the formula: M=C Phi Ia, wherein M is torque, C is constant, Phi is magnetic flux and Ia is armature current, the Phi of the combined magnetic pole is controlled to allow the motor to output different torques according to the practical loading condition. The utility model incorporates the advantages of both permanent-magnet motor and current excited motor, and is adaptive for the controllable adjustment upon unstable loads to reduce high-current operation under overload, thereby optimizing work environment and increasing service life of motor and battery.
Description
Technical field:
The utility model relates to a kind of direct current machine, particularly a kind of direct current machine of compound rectifier excitation.
Background technology:
Motor of electric motor car is divided into by excitation mode at present: current excitation and permanent magnet excitation two big classes.Commonly used current excitation electromotor structure such as Fig. 1, current excitation electromotor comprises: rotor 2 and stator 1, be wound with armature winding 4 on the iron core of rotor, be equipped with somely on stator 1 inner surface to magnetic pole 3, magnetic pole is provided with excitation winding 5.Current excitation electromotor is switched on by excitation winding and is set up magnetic field, and the electric motor car of having used current excitation electromotor is when zero load, and the motor speed height is unfavorable for speed of a motor vehicle control; And when climbing, along with the increase of load, rotating speed of motor descends obviously, and it can improve the climbing and the overload capacity of electric motor car, but low in overload rear motor efficient, power consumption is big.
The structure of magneto such as Fig. 2, this type of motor comprises: rotor 2 and stator 1, be wound with armature winding 4 on the iron core of rotor, stator inner surface is provided with some to permanent magnet 6.Magneto provides magnetic field by permanent magnet, and the rotating speed of magneto is steady, and the electric bicycle speed ratio of having used magneto is easier to control, and motor is along with the increase of load, and rotating speed of motor descends few than current excitation electromotor.But when motor climbing or overload, require motor that very big moment of torsion output is arranged, at this moment, armature supply is very big, can burn motor when serious.
Above-mentioned two kinds of motors all can't be realized effective adjusting of output torque according to loading condition.
Summary of the invention:
The purpose of this utility model is: provide a kind of and can realize that output torque is effectively regulated, direct current machine rational in infrastructure according to loading condition.The utility model is achieved through the following technical solutions:
A kind of direct current machine comprises: rotor and stator, and the rotating shaft of rotor is provided with brush-commutated device, and stator is provided with some to magnetic pole; It is characterized in that: be wound with armature winding on the iron core of described rotor, magnetic pole is the composite pole that permanent magnet and excitation winding constitute.Because the composite pole that magnetic pole of the present utility model adopts permanent magnet and excitation winding to constitute, according to M=C φ Ia, M is torque, and C is a constant, and φ is a magnetic flux, and Ia is an armature supply.The magnetic flux φ of control composite pole can make existing motor export different torques, makes motor of the present utility model realize that output torque effectively regulates according to loading condition.The utility model combines the advantage of magneto and current excitation electromotor, and motor can satisfy the controllable adjustment under unsteady load, optimize the operational environment of motor, big current work when significantly reducing overload, the useful life of having improved motor, battery.
In the utility model, described composite pole is the superimposed composite pole of magnetic field of permanent magnet and excitation winding magnetic field.Direct current machine of the present utility model provides magnetic field by permanent magnet when operate as normal, rotating speed of motor is steady.When load is big, be torque according to M=C φ Ia M, C is a constant, and φ is a magnetic flux, and Ia is an armature supply.By controller excitation winding is obtained, work with original magnetic field, air gap flux density moment reinforcement, motor speed significantly descends, and moment of torsion increases significantly, motor enters high pulling torque slow-speed of revolution operation immediately, this moment, current of electric descended, and running becomes steadily, has improved the motor anti-overload ability, greatly reduce the danger of burn-down of electric motor, prolonged the life-span.When motor load reduced, controller detected motor working current less than set point, the excitation winding outage, and permanent magnetic circuit work, motor recovers operate as normal.Because controller and testing circuit are prior aries, no longer describe at this.
In the utility model, be provided with permanent magnet in the magnetic pole body of described composite pole and insert the chamber, permanent magnet is installed in this insertion chamber, and the magnetic pole body is provided with excitation winding outward.Adopt said structure, permanent magnet is located in magnetic pole reliably, guarantee that the magnetic field and the excitation winding magnetic field of composite pole permanent magnet effectively superposes, be convenient to make and install.
In the utility model, the magnetic pole body is formed by stacking by some silicon steel sheets, and magnetic pole body two ends are provided with the magnetic pole cover plate, and fixture links into an integrated entity two magnetic pole cover plates and magnetic pole body.Adopt said structure, permanent magnet is located more reliable in magnetic pole, and composite pole is rational in infrastructure, and is easily manufactured.
In the utility model, be provided with drift in the described magnetic pole body and insert the chamber, securing member by drift with in the magnetic pole fixed electrical machinery housing.Adopt said structure, the magnetic pole body is fixing reliable.
Description of drawings:
Fig. 1 is existing current excitation electromotor horizontal section schematic diagram.
Fig. 2 is existing magneto horizontal section schematic diagram.
Fig. 3 is a motor longitudinal profile schematic diagram of the present utility model.
Fig. 4 is a motor horizontal section schematic diagram of the present utility model.
Fig. 5 is a field structure schematic diagram of the present utility model.
Embodiment:
In conjunction with Fig. 3, Fig. 4, shown in Figure 5: the direct current machine of present embodiment comprises: rotor 2 and stator 1, and the rotating shaft 8 of rotor is provided with brush-commutated device 7, and stator is provided with two pairs of magnetic poles 3, and the logarithm of magnetic pole 3 can be set as requested.Be wound with armature winding 4 on the iron core of rotor, magnetic pole is the composite pole that permanent magnet 6 and excitation winding 5 constitute.Composite pole is the superimposed composite pole of magnetic field of permanent magnet and excitation winding magnetic field.Be provided with permanent magnet 6 in the magnetic pole body of composite pole and insert chamber 9, permanent magnet 6 is installed in this insertion chamber 9, and the magnetic pole body is provided with excitation winding 5 outward.The magnetic pole body is formed by stacking by some silicon steel sheets, and magnetic pole body two ends are provided with magnetic pole cover plate 10,11, and fixture 12 links into an integrated entity two magnetic pole cover plates 10 and magnetic pole body.Be provided with drift 13 in the magnetic pole body and insert chamber 14, securing member passes through drift 13 with in the magnetic pole fixed electrical machinery housing.
Because the composite pole that magnetic pole of the present utility model adopts permanent magnet and excitation winding to constitute, the magnetic flux φ of control composite pole can make existing motor export different torques.Make motor of the present utility model realize that output torque effectively regulates according to loading condition.When operate as normal, provide magnetic field by permanent magnet, rotating speed of motor is steady.When load is big, make excitation winding obtain electricity by controller, air gap flux density moment reinforcement, reaching motor speed significantly descends, the purpose that moment of torsion increases significantly, motor enter high pulling torque slow-speed of revolution operation immediately, and this moment, current of electric descended, running becomes steady, thereby improved the motor anti-overload ability, greatly reduced the danger of burn-down of electric motor, prolonged the life-span, reduce power consumption, improve the distance that continues of electric motor car.
Claims (5)
1, a kind of direct current machine comprises: rotor and stator, and the rotating shaft of rotor is provided with brush-commutated device, and stator is provided with some to magnetic pole; It is characterized in that: be wound with armature winding on the iron core of described rotor, magnetic pole is the composite pole that permanent magnet and excitation winding constitute.
2, direct current machine according to claim 1; It is characterized in that: described composite pole is the superimposed composite pole of magnetic field of permanent magnet and excitation winding magnetic field.
3, direct current machine according to claim 1; It is characterized in that: be provided with permanent magnet in the magnetic pole body of described composite pole and insert the chamber, permanent magnet is installed in this insertion chamber, and the magnetic pole body is provided with excitation winding outward.
4, direct current machine according to claim 3; It is characterized in that: the magnetic pole body is formed by stacking by some silicon steel sheets, and magnetic pole body two ends are provided with the magnetic pole cover plate, and fixture links into an integrated entity two magnetic pole cover plates and magnetic pole body.
5, direct current machine according to claim 3; It is characterized in that: be provided with drift in the described magnetic pole body and insert the chamber, securing member by drift with in the magnetic pole fixed electrical machinery housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520006677 CN2877124Y (en) | 2005-12-31 | 2005-12-31 | DC electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520006677 CN2877124Y (en) | 2005-12-31 | 2005-12-31 | DC electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2877124Y true CN2877124Y (en) | 2007-03-07 |
Family
ID=37820360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520006677 Expired - Fee Related CN2877124Y (en) | 2005-12-31 | 2005-12-31 | DC electric machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2877124Y (en) |
-
2005
- 2005-12-31 CN CN 200520006677 patent/CN2877124Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Zhejiang Unite Motor Co.,Ltd. Assignor: Li Jindong Contract fulfillment period: 2009.7.20 to 2015.7.19 Contract record no.: 2009330001781 Denomination of utility model: Disk-type acyclic DC motor Granted publication date: 20070307 License type: Exclusive license Record date: 20090731 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.7.20 TO 2015.7.19; CHANGE OF CONTRACT Name of requester: ZHEJIANG UNITE ELECTRIC MACHINE CO., LTD. Effective date: 20090731 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070307 Termination date: 20131231 |