CN204517611U - A kind of pole claw mixed excitation electric machine - Google Patents
A kind of pole claw mixed excitation electric machine Download PDFInfo
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- CN204517611U CN204517611U CN201520089512.XU CN201520089512U CN204517611U CN 204517611 U CN204517611 U CN 204517611U CN 201520089512 U CN201520089512 U CN 201520089512U CN 204517611 U CN204517611 U CN 204517611U
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Abstract
The utility model discloses a kind of pole claw mixed excitation electric machine, comprise front end housing, casing and rear end cap, fore bearing, rear bearing, rotating shaft, stator pack, p-m rotor iron core, electric excitation rotor excitation pole, yoke bracket and excitation winding.Usefulness is: in excitation electromotor of the present utility model, electricity magnetic excitation circuit and permanent magnetic circuit parallel connection provide magnetic flux to main air gap, common outwards Driving Torque, thus larger torque can be provided to export, there is higher unit volume exert oneself, and save the use amount of permanent magnetic material, reduce the cost of motor; When electric exciting current is zero, the permanent magnet flux that permanent magnetic steel provides some obtain reduction by pole pawl leakage magnetic circuit, namely now weak magnetic state has been in, the unloaded back-emf of motor is reduced, and then make motor can run on higher rotary speed area with higher efficiency, and under this weak magnetic state, magnet steel does not need to bear reverse excitation magnetic potential, reduces the risk of magnet steel irreversible demagnetization.
Description
Technical field
The utility model relates to a kind of composite excitation formula electric rotating machine, especially relate to a kind of based on pole claw, the composite excitation formula electric rotating machine that uses tangential permanent magnet magnet steel and electric magnet exciting coil.
Background technology
Drive motors is as one of the key core parts of electric automobile, it does one's utmost the performance pursuing high torque density, high reliability, low speed high torque and invariable power wide range speed control, the performance index of its harshness force motor must systematically consider low speed and high speed performance when designing, to reach good compromise balance.
When drive motors designs, if ensure that having large torque at the low rotational speed exports, so due to its higher back-emf, output performance at a high speed will be limited, although expansion speed can be carried out by weak magnetic, but be still not enough to support the required large range of speeds of electric automobile, and also cannot all keep higher efficiency in the whole range of speeds.
Mixed excitation electric machine can farthest inherit the plurality of advantages such as magneto high efficiency, high power density, and there is the smoothly adjustable advantage of electro-magnetic motor air-gap field, this widens greatly with regard to making the speed adjustable range of composite excitation motor obtain, and electric automobile is widely used.
In recent years, along with the continuous research and development of power electronics and magneto technology, the mixed excitation electric machine emerged in large numbers is varied, is roughly summed up as following three kinds of structures from permanent magnetism and electric excitation magnetic potential compound mode: the parallel and magnetic potential series parallel type of magnetic potential tandem, magnetic potential.Wherein, the parallel flux control Performance Ratio other two kinds of magnetic potential has obvious advantage, apply comparatively extensive, but the equal more complicated of magnetic structure of existing magnetic potential parallel type mixing excitation motor, seeking simple and reasonable for structure, compact motor body structure becomes one of main target of mixed excitation electric machine design pursuit.
Utility model content
For solving the deficiencies in the prior art, the purpose of this utility model is to provide a kind of pole claw mixed excitation electric machine, there is the feature such as low speed high torque, wide speed adjustable range, the characteristic of magneto high efficiency, high power density, low speed high torque can be made full use of, there is again the function that electric excitation air-gap field is smoothly adjustable, weak magnetic haves a wide reach, and is the desirable drive motors of electric automobile.
In order to realize above-mentioned target, the utility model adopts following technical scheme:
A kind of pole claw mixed excitation electric machine, comprise the front end housing, casing and the rear end cap that connect as one, also comprise: fore bearing, rear bearing, rotating shaft, stator pack, p-m rotor iron core, electric excitation rotor excitation pole, yoke bracket and excitation winding, described fore bearing and rear bearing are installed on front end housing and rear end cap respectively with supporting shaft, described stator pack comprises stator core and is embedded in stator winding wherein, and stator core interference fit is in casing; Described p-m rotor iron core is evenly distributed with several magnet mounting groove and magnetic pole mounting groove, insert in described magnet mounting groove and tangential permanent magnetic magnet steel is installed, described electric excitation rotor excitation pole is installed in magnetic pole mounting groove, and, the rear polar grab of electricity excitation rotor excitation pole is fixedly connected with rotating shaft, front pole pawl is fixed on rear polar grab, described yoke bracket is fixed in front end housing, excitation winding is wound on yoke bracket, leaves interstice between described yoke bracket and front pole pawl, rear polar grab.
Preferably, aforementioned front pole pawl is fixed on rear polar grab by non-magnetic connecting ring.
Particularly, magnetic pole mounting groove is dovetail mounting groove, and described electric excitation rotor excitation pole is formed with dovetail groove type salient-pole structure to embed in dovetail mounting groove.
Preferably, aforementioned rotation axis is formed with keyway to connect rear polar grab.
More preferably, aforementioned yokes bracket is connected with front end housing by bolt.
Further, this motor is four poles, sextupole or ends of the earth structure.So-called ends of the earth structure, that is: described p-m rotor iron core is evenly distributed with 8 magnet mounting groove and magnetic pole mounting groove.
The operation principle of mixed excitation electric machine of the present utility model is: p-m rotor iron core adopts the tangential permanent magnetic magnetic steel structure with poly-magnetic effect, for monolithic permanent magnetic steel outwards provides magnetic flux, magnetic circuit, from the N pole of permanent magnetic steel, gets back to formation loop, permanent magnetic steel S pole through air gap, stator tooth, stator yoke, stator tooth, air gap.Electricity magnetic excitation circuit is that the axial magnetic flux that electric magnet exciting coil produces is converted to radial flux through pole pawl, from excitation pole N pole, the S pole of electric magnetic excitation circuit is got back to through air gap, stator tooth, stator yoke, stator tooth, air gap, and warp beam forms closed magnetic circuit to conductive magnetic yoke portion, this magnetic circuit is in parallel with permanent magnetic circuit, jointly provides magnetic flux to air gap.Wherein, permanent magnetic field substantially constant, when the electric magnetic excitation circuit of needs provides magnetic assist magnetic flux, now electric excitation and permanent magnetic steel outwards provide magnetic flux jointly; When electric magnet exciting coil electric current is zero, now only has permanent magnet flux, in view of the air gap between electric magnet exciting coil support and conductive magnetic yoke portion, pawl pole and interstice and the main air gap of motor are more or less the same, according to magnetic circuit minimum reluctance principle, the magnetic flux of now permanent magnetic steel generation, the leakage flux path having almost half magnetic flux to be formed by pole pawl and conductive magnetic yoke portion is closed, and makes the permanent magnet flux supplying main air gap reduce close to 50%, and now corresponding weak magnetism speed expansion scope obtains significantly to be expanded.
Usefulness of the present utility model is: in excitation electromotor of the present utility model, electricity magnetic excitation circuit and permanent magnetic circuit parallel connection provide magnetic flux to main air gap, common outwards Driving Torque, thus larger torque can be provided to export, there is higher unit volume exert oneself, and save the use amount of permanent magnetic material, reduce the cost of motor; When electric exciting current is zero, the permanent magnet flux that permanent magnetic steel provides some obtain reduction by pole pawl leakage magnetic circuit, namely now weak magnetic state has been in, the unloaded back-emf of motor is reduced, and then make motor can run on higher rotary speed area with higher efficiency, and under this weak magnetic state, magnet steel does not need to bear reverse excitation magnetic potential, reduces the risk of magnet steel irreversible demagnetization.
Accompanying drawing explanation
Fig. 1 is the cutaway view of a preferred embodiment of a kind of pole of the present utility model claw mixed excitation electric machine;
Fig. 2 be embodiment illustrated in fig. 1 in rotor structure plane graph;
Fig. 3 is the perspective view of middle electric excitation rotor excitation pole embodiment illustrated in fig. 1.
The implication of Reference numeral in figure: 1, rotating shaft, 2-1, rear bearing, 2-2, fore bearing, 3-1, rear end cap, 3-2, front end housing, 4, casing, 5, stator winding, 6, stator core, 7, p-m rotor is unshakable in one's determination, 8, electric excitation rotor excitation pole, 9, non-magnetic connecting ring, 10, excitation winding, 11, yoke bracket, 12, bolt, 13, magnet mounting groove, 14, permanent magnetic steel, 15, magnetic pole mounting groove, 16, dovetail groove type salient-pole structure.
Embodiment
Below in conjunction with the drawings and specific embodiments, concrete introduction is done to the utility model.
See Fig. 1, a kind of pole of the present utility model claw mixed excitation electric machine, comprise the front end housing 3-2, casing 4 and the rear end cap 3-1 that connect as one, front end housing 3-2 and rear end cap 3-1 are respectively equipped with fore bearing 2-2 and rear bearing 2-1, and rotating shaft 1 is supported on fore bearing 2-2 and rear bearing 2-1 and also can rotates freely.Stator winding 5 is embedded in stator core 6, and stator core 6 passes through the mode hot jacket of interference fit in casing 4.
Composition graphs 2, p-m rotor iron core 7 is evenly distributed with several magnet mounting groove 13 and magnetic pole mounting groove 15, insert in magnet mounting groove 13 and tangential permanent magnetic magnet steel 14 is installed, electricity excitation rotor excitation pole 8 is installed in magnetic pole mounting groove 15, and, the rear polar grab of electricity excitation rotor excitation pole 8 is fixedly connected with rotating shaft 1, front pole pawl is fixed on rear polar grab by non-magnetic connecting ring 9, yoke bracket 11 is fixed in front end housing 3-2 by bolt 12, excitation winding 10 is wound on yoke bracket 11, after installation, yoke bracket 11 and front pole pawl, interstice is left between rear polar grab.
Preferred as one, as shown in Figures 2 and 3, magnetic pole mounting groove 15 is dovetail mounting groove, electric excitation rotor excitation pole 8 is then formed with dovetail groove type salient-pole structure 16, this dovetail groove type salient-pole structure 16 is embedded in dovetail mounting groove, electric excitation rotor excitation pole 8 can be fixed together with p-m rotor iron core 7.
The motor of the present embodiment is ends of the earth structure; that is: p-m rotor iron core 7 is evenly distributed with 8 magnet mounting groove 13 and magnetic pole mounting groove 15; in fact; the structure of motor is not limited thereto; four poles or sextupole structure; this is the simple accommodation that those skilled in the art are easy to expect, also belongs to protection range of the present utility model, repeats no more herein.
In order to understand the utility model better, below the magnetic flux path under different operating state is analyzed as follows.
Permanent magnet flux magnetic circuit is: from the N pole of permanent magnetic steel 14, gets back to the formation loop, S pole of permanent magnetic steel 14 through the teeth portion of air gap, stator core 6, the yoke portion of stator core 6, the teeth portion of stator core 6, air gap.
Electro-magnetic flux magnetic circuit is: the axial magnetic flux that electric excitation rotor excitation winding 10 produces is converted to radial flux through electric excitation rotor excitation pole 8, from rear polar grab excitation pole N pole, the S pole of front pole pawl excitation pole is got back to through the teeth portion of p-m rotor iron core 7, air gap, stator core 6, the yoke portion of stator core 6, the teeth portion of stator core 6, air gap, p-m rotor iron core 7, closed magnetic circuit is formed through yoke bracket 11 and interstice, this magnetic circuit is in parallel with permanent magnetic circuit, jointly provides magnetic flux to air gap.Wherein, permanent magnetic field substantially constant, when the electric current of electric excitation winding 10 is zero, now only has permanent magnet flux, in view of the air gap between yoke bracket 11 and conductive magnetic yoke portion, pawl pole and interstice and the main air gap of motor are more or less the same, now permanent magnet flux is except a part of magnetic flux is according to except aforesaid magnetic circuit operation, a part of magnetic flux is from the N pole of permanent magnetic steel 14 in addition, front pole pawl through the rear polar grab of electric excitation rotor, yoke bracket 11 and interstice, electric excitation rotor arrives the S pole of permanent magnetic steel 14, is now in weak magnetic state.
To sum up, electric magnetic excitation circuit of the present utility model and permanent magnetic circuit parallel connection provide magnetic flux to main air gap, common outwards Driving Torque, thus larger torque can be provided to export, there is higher unit volume exert oneself, and save the use amount of permanent magnetic material, reduce the cost of motor; When electric exciting current is zero, the permanent magnet flux that permanent magnetic steel 14 provides some obtain reduction by pole pawl leakage magnetic circuit, namely be now in weak magnetic state, the unloaded back-emf of motor is reduced, and then make motor can run on higher rotary speed area with higher efficiency.And under this weak magnetic state, magnet steel does not need to bear reverse excitation magnetic potential, reduces the risk of magnet steel irreversible demagnetization.
More than show and describe general principle of the present utility model, principal character and advantage.The technical staff of the industry should understand, and above-described embodiment does not limit the utility model in any form, the technical scheme that the mode that all employings are equal to replacement or equivalent transformation obtains, and all drops in protection range of the present utility model.
Claims (7)
1. a pole claw mixed excitation electric machine, comprise the front end housing, casing and the rear end cap that connect as one, it is characterized in that, also comprise: fore bearing, rear bearing, rotating shaft, stator pack, p-m rotor iron core, electric excitation rotor excitation pole, yoke bracket and excitation winding, described fore bearing and rear bearing are installed on front end housing and rear end cap respectively with supporting shaft, described stator pack comprises stator core and is embedded in stator winding wherein, and stator core interference fit is in casing; Described p-m rotor iron core is evenly distributed with several magnet mounting groove and magnetic pole mounting groove, insert in described magnet mounting groove and tangential permanent magnetic magnet steel is installed, described electric excitation rotor excitation pole is installed in magnetic pole mounting groove, and, the rear polar grab of electricity excitation rotor excitation pole is fixedly connected with rotating shaft, front pole pawl is fixed on rear polar grab, described yoke bracket is fixed in front end housing, excitation winding is wound on yoke bracket, leaves interstice between described yoke bracket and front pole pawl, rear polar grab.
2. a kind of pole according to claim 1 claw mixed excitation electric machine, is characterized in that, described front pole pawl is fixed on rear polar grab by non-magnetic connecting ring.
3. a kind of pole according to claim 1 claw mixed excitation electric machine, it is characterized in that, described magnetic pole mounting groove is dovetail mounting groove, and described electric excitation rotor excitation pole is formed with dovetail groove type salient-pole structure to embed in dovetail mounting groove.
4. a kind of pole according to claim 1 claw mixed excitation electric machine, is characterized in that, described rotating shaft is formed with keyway to connect rear polar grab.
5. a kind of pole according to claim 1 claw mixed excitation electric machine, it is characterized in that, described yoke bracket is connected with front end housing by bolt.
6. a kind of pole claw mixed excitation electric machine according to any one of claim 1-5, is characterized in that, this motor is four poles, sextupole or ends of the earth structure.
7. a kind of pole according to claim 6 claw mixed excitation electric machine, it is characterized in that, this motor is ends of the earth structure, that is: described p-m rotor iron core is evenly distributed with 8 magnet mounting groove and magnetic pole mounting groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520089512.XU CN204517611U (en) | 2015-02-09 | 2015-02-09 | A kind of pole claw mixed excitation electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520089512.XU CN204517611U (en) | 2015-02-09 | 2015-02-09 | A kind of pole claw mixed excitation electric machine |
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| Publication Number | Publication Date |
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| CN204517611U true CN204517611U (en) | 2015-07-29 |
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|---|---|---|---|
| CN201520089512.XU Expired - Fee Related CN204517611U (en) | 2015-02-09 | 2015-02-09 | A kind of pole claw mixed excitation electric machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104659994A (en) * | 2015-02-09 | 2015-05-27 | 苏州力久新能源科技有限公司 | Claw-type hybrid excitation motor |
-
2015
- 2015-02-09 CN CN201520089512.XU patent/CN204517611U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104659994A (en) * | 2015-02-09 | 2015-05-27 | 苏州力久新能源科技有限公司 | Claw-type hybrid excitation motor |
| CN104659994B (en) * | 2015-02-09 | 2017-10-03 | 澳特卡新能源科技（上海）有限公司 | A kind of pole claw mixed excitation electric machine |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150928 Address after: 200126, No. 251, Yaohua Road, Pudong New Area Free Trade Zone, Shanghai Patentee after: Macao tecka new energy technology (Shanghai) Co., Ltd. Address before: 215211 Jiangsu city of Suzhou province Wujiang FENHU Economic Development Zone, Road No. 35. Patentee before: Suzhou Pixcir Microelectronics Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150729 Termination date: 20180209 |