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Stator for electric car hub motor and motor containing the same

A technology for in-wheel motors and electric vehicles, applied in the field of electric vehicles, can solve the problems of structural changes of electric vehicles, low motor conversion efficiency, and sharp increase in motor failure rate, so as to increase the area of ​​stator slots, prevent the failure of Hall position sensors, Improve the effectiveness of the efficiency platform

Active Publication Date: 2016-12-07
WENLING JIUZHOU ELECTROMECHANICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional electric wheel hub motors have the problem of low motor conversion efficiency, and under complex road conditions (such as rural roads), electric vehicles will have problems such as insufficient power, weak climbing, short cruising range, burning coils, and burning Hall devices. Motor failure rate increases sharply
The current practice in the industry is to increase the size of the stator by increasing the size of the hub to improve the anti-overload capability, but increasing the size of the hub will inevitably lead to changes in the structure of the electric vehicle and an increase in manufacturing costs

Method used

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  • Stator for electric car hub motor and motor containing the same
  • Stator for electric car hub motor and motor containing the same
  • Stator for electric car hub motor and motor containing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Such as Figure 1 to Figure 5 As shown, a 10-inch electric wheel hub motor stator provided in this embodiment includes a stator core 1 and a bracket 2, the stator core 1 is fixed on the bracket 2, and the stator core 1 is formed by laminating several stator pieces. As a result, a copper wire winding 8 is wound on the stator core 1 . In this embodiment, two above-mentioned brackets 2 with the same shape are used to fix the stator core 1 between the two brackets 2 by crimping. A mounting hole is provided in the center of the bracket 2, and a shaft sleeve 3 is pierced in the mounting hole. The stator core 1 is provided with anti-rotation grooves 15, and the bracket 2 is provided with anti-rotation ribs 21. The above-mentioned anti-rotation grooves 15 and anti-rotation ribs 21 correspond one-to-one, which can ensure that the stator will be under the action of electromagnetic shear force when the motor rotates. It will not rotate with it. In this embodiment, the structure ...

Embodiment 2

[0063] The technical solutions in this embodiment are mostly the same as those in Embodiment 1. This embodiment only describes the different parts in detail, and the parts that are the same as those in Embodiment 1 will not be repeated here.

[0064] The outer diameter of the stator core 1 is 205.01-212 mm, preferably, the outer diameter of the stator core 1 is 206-210 mm, the notch width A2 of the stator core slot is related to the outer diameter of the stator core, the inner diameter of the stator core, and the yoke of the stator core The internal thickness A3 and the number of stator core slots satisfy the following relationship:

[0065] In this embodiment, the structure of the stator is a structure of 48 slots and 44 pieces of permanent magnets. The notch width A2 of the stator core slot = (α + the value of the thickness of the single-layer silicon steel sheet of the stator core) × π × (outer diameter of the stator core-inner diameter of the stator core-thickness of the y...

Embodiment 3

[0068] In this embodiment, the structure of the stator is a structure of 48 slots and 52 pieces of permanent magnets. The technical solutions in this embodiment are mostly the same as those in Embodiment 1. This embodiment only describes the different parts in detail, and the parts that are the same as those in Embodiment 1 will not be repeated here.

[0069] The outer diameter of the stator core 1 is 205.01 to 212 mm, preferably, the outer diameter of the stator core 1 is 205.5 to 211 mm, and the notch width A2 of the stator core slot is related to the outer diameter of the stator core, the inner diameter of the stator core, and the yoke of the stator core The internal thickness A3 and the number of stator core slots satisfy the following relationship:

[0070] The notch width A2 of the stator core slot = (α + the value of the thickness of the single-layer silicon steel sheet of the stator core) × π × (outer diameter of the stator core-inner diameter of the stator core-thickn...

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Abstract

The invention relates to a stator for an electric car hub motor and a motor containing the same. The stator for the electric car hub motor comprises a stator core and a bracket; the stator core is fixed on the bracket, the outer diameter of the stator core is 205.01-212mm, the notch width of the stator core groove, the stator core outer diameter, the stator core inner diameter, the yoke thickness of the stator core, and the stator core groove number meet the following relations: the notch width of the stator core groove=(alpha+ the value of the single-layer silicon steel sheet thickness of the stator core)*Pai*(stator core outer diameter-stator core inner diameter-yoke thickness of the stator core) / stator core groove number, wherein the value range of alpha is 0.3-0.9. The stator disclosed by the invention has the beneficial effects: the stator structure of the invention reasonably optimizes the electric power and magnetic power in the motor magnetic circuit design, the quick heating condition of the motor caused by short-term overload is avoided, the problems that a winding insulation layer is damaged and the Hall position sensor is invalid are prevented, and the service life of the motor is increased.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a stator for an electric wheel hub motor and a motor containing the stator. Background technique [0002] Electric vehicles are favored by consumers because of their advantages such as convenient driving, easy parking, and environmental protection. As the core component of an electric vehicle, the motor has a great influence on its performance, efficiency, and reliability. A high-performance drive motor plays a decisive role in realizing the functions of an electric vehicle. [0003] At present, most electric vehicle motors are in-wheel motors. The main components inside the in-wheel motor include a rotor and a stator with multiple permanent magnets evenly distributed radially on the inner edge. The outer edge of the stator is integrally connected with the hub, and the polarities of multiple permanent magnets are alternately arranged. The outer edge of the stator is ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/17H02K1/18H02K1/16H02K1/27H02K1/28
CPCH02K1/165H02K1/17H02K1/18H02K1/2786H02K1/28Y02T10/64
Inventor 钟治平钟玲兵洪国平
Owner WENLING JIUZHOU ELECTROMECHANICAL
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