CN209389802U - A kind of tangential magnetic structure of external rotor electric machine - Google Patents
A kind of tangential magnetic structure of external rotor electric machine Download PDFInfo
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- CN209389802U CN209389802U CN201920198950.8U CN201920198950U CN209389802U CN 209389802 U CN209389802 U CN 209389802U CN 201920198950 U CN201920198950 U CN 201920198950U CN 209389802 U CN209389802 U CN 209389802U
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Abstract
The utility model proposes a kind of tangential magnetic structures of external rotor electric machine, including outer rotor and stator, the stator includes stator yoke, stator tooth and winding, the outer rotor includes shell and the rotor tooth made of permeability magnetic material, the magnetism-isolating loop made of non-magnet material is equipped between the shell and the rotor tooth, magnet steel is equipped between the rotor tooth, the magnetizing direction of the magnet steel and the outer circle of the stator are tangent.The tangential magnetic structure causes the cross, straight inductance of motor inconsistent, that is, increases the salient pole ratio of motor, increases so as to cause the reluctance torque of motor, and then improve the power density of motor.Meanwhile the increase of the salient pole ratio of motor, the control of motor weak-magnetic speed-regulating is also easily facilitated, to extend output-constant operation range.
Description
Technical field
The utility model belongs to technical field of motors, and in particular to a kind of tangential magnetic structure of external rotor electric machine.
Background technique
Magnetic structure used in external rotor electric machine is outer radial magnetic structure at present, as shown in Figure 3 and Figure 4, including 3 He of stator
Rotor 4, stator 3 include stator yoke 31, stator tooth 32 and winding 33, and rotor 4 includes rotor yoke 41 and magnet steel 42, the magnet steel 42
Magnetizing direction is directed to the stator center of circle.Its advantage is that magnetic structure is simple, it is easy for installation, but because its salient pole is smaller,
Reluctance torque accounts for smaller, is not easy to improve power density and output-constant operation range.
Utility model content
It in view of the deficiencies of the prior art, can be effective the utility model proposes a kind of tangential magnetic structure of external rotor electric machine
Improve the power density and output-constant operation range of motor.
The technical solution of the utility model is achieved in that a kind of tangential magnetic structure of external rotor electric machine, including outer
Rotor and stator, the stator include stator yoke, stator tooth and winding, and the outer rotor includes shell and is made of permeability magnetic material
Rotor tooth, the magnetism-isolating loop made of non-magnet material is equipped between the shell and the rotor tooth, between the rotor tooth
Equipped with magnet steel, the magnetizing direction of the magnet steel and the outer circle of the stator are tangent.
The tangential magnetic structure causes the cross, straight inductance of motor inconsistent, that is, increases the salient pole ratio of motor, so as to cause
The reluctance torque of motor increases, and then improves the power density of motor.Meanwhile the increase of the salient pole ratio of motor, also easily facilitate
Motor weak-magnetic speed-regulating control, to extend output-constant operation range.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is enlarged diagram at A in Fig. 1；
Fig. 3 is the structural schematic diagram of the prior art；
Fig. 4 is enlarged diagram at B in Fig. 3.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
Every other embodiment obtained, fall within the protection scope of the utility model.
The tangential magnetic structure of external rotor electric machine as depicted in figs. 1 and 2, including outer rotor 2 and stator 1, stator include
Stator yoke 11, stator tooth 12 and winding 13, outer rotor 2 include shell 21 and rotor tooth 23 made of permeability magnetic material, shell 21
It is equipped with magnetism-isolating loop 22 made of non-magnet material between rotor tooth 23, is equipped with magnet steel 24, the magnet steel 24 between rotor tooth 23
Magnetizing direction and stator 1 outer circle it is tangent.
Working principle: the size of inductance value is directly proportional to magnetic resistance, since the magnetic resistance of magnet steel 24 is significantly less than rotor tooth 23
Magnetic resistance is greater than directly as shown in Figure 1, this magnetic structure is formed by axis inductor value (inductance value of 23 place axis 5 of rotor tooth)
Axle inductance value (inductance value of 24 place axis 6 of magnet steel), causes the cross, straight inductance of motor inconsistent, that is, increases the convex of motor
Ultimate ratio increases so as to cause the reluctance torque of motor, and then improves the power density of motor.Meanwhile the increasing of the salient pole ratio of motor
Greatly, the control of motor weak-magnetic speed-regulating is also easily facilitated, to extend output-constant operation range.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (1)
1. a kind of tangential magnetic structure of external rotor electric machine, including outer rotor and stator, the stator includes stator yoke, stator tooth
And winding, it is characterised in that: the outer rotor includes shell and the rotor tooth made of permeability magnetic material, the shell with described turn
It is equipped with the magnetism-isolating loop made of non-magnet material between sub- tooth, is equipped with magnet steel, the magnetizing direction of the magnet steel between the rotor tooth
It is tangent with the outer circle of the stator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920198950.8U CN209389802U (en) | 2019-02-15 | 2019-02-15 | A kind of tangential magnetic structure of external rotor electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920198950.8U CN209389802U (en) | 2019-02-15 | 2019-02-15 | A kind of tangential magnetic structure of external rotor electric machine |
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| CN209389802U true CN209389802U (en) | 2019-09-13 |
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| CN201920198950.8U Active CN209389802U (en) | 2019-02-15 | 2019-02-15 | A kind of tangential magnetic structure of external rotor electric machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109660043A (en) * | 2019-02-15 | 2019-04-19 | 江苏嘉轩智能工业科技股份有限公司 | A kind of tangential magnetic structure of external rotor electric machine |
-
2019
- 2019-02-15 CN CN201920198950.8U patent/CN209389802U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109660043A (en) * | 2019-02-15 | 2019-04-19 | 江苏嘉轩智能工业科技股份有限公司 | A kind of tangential magnetic structure of external rotor electric machine |
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Legal Events
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 213000 No. 502, Changting Road, West Taihu science and Technology Industrial Park, Wujin District, Changzhou City, Jiangsu Province Patentee after: JIANGSU JIAXUAN INTELLIGENT INDUSTRIAL TECHNOLOGY CO.,LTD. Address before: 213000 No. 10, Xin Hu Road, Xue Yan Town, Wujin District, Changzhou, Jiangsu Patentee before: JIANGSU JIAXUAN INTELLIGENT INDUSTRIAL TECHNOLOGY CO.,LTD. |
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| CP02 | Change in the address of a patent holder |