High-power-density hub motor structure

A high power density, wheel hub motor technology, applied in the direction of magnetic circuit shape/style/structure, winding conductor shape/style/structure, electric components, etc., can solve the problem of high vibration and noise, insufficient motor torque density and power density, etc. problem, to achieve the effect of reducing copper loss, convenient and fast processing and manufacturing, and increasing torque

Active Publication Date: 2021-07-16
台铃科技(江苏)股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the prior art disclosed above all has the problems of insufficient motor torque density and power density, and large vibration and noise.

Method used

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  • High-power-density hub motor structure

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Embodiment Construction

[0040] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be noted that the following embodiments are intended to facilitate the understanding of the present invention, but do not limit it in any way.

[0041] Such as Figure 1~3 As shown, a high-power-density in-wheel motor structure includes an outer rotor 2, a stator 7, an inner rotor 13, and a hub 1 arranged coaxially. The outer rotor 2 and the inner rotor 13 are connected by a fixed bracket 14 to drive the hub 1. Turn together.

[0042] The outer rotor 2 includes an outer rotor core 21 and a plurality of V-shaped magnetic steel grooves 3 uniformly arranged on the outer rotor core 21 in the circumferential direction, and a straight magnetic steel groove 4 is arranged between two adjacent V-shaped magnetic steel grooves 3 The large opening of the V-shaped magnetic steel groove 3 faces the center of the circle, and the inline magnetic steel ...

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Abstract

The invention discloses a high-power-density hub motor structure. The high-power-density hub motor structure comprises an outer rotor, a stator, an inner rotor and a hub which are coaxially arranged, the outer rotor and the inner rotor are connected through a fixing support, the outer rotor comprises an outer rotor iron core and a plurality of V-shaped magnetic steel grooves evenly formed in the outer rotor iron core in the circumferential direction, and a linear magnetic steel groove is formed between every two adjacent V-shaped magnetic steel grooves; a permanent magnet is embedded in each magnetic steel groove, the periphery of the outer rotor iron core is fixed with a hub; inner stator teeth and outer stator teeth are arranged on the stator, and an inner stator slot and an outer stator slot are respectively arranged between the adjacent inner stator teeth and between the adjacent outer stator teeth; the inner stator slot and the outer stator slot are respectively provided with two set of concentrated windings, the two sets of concentrated windings are connected in series; and the end part of each inner stator tooth and the end part of each outer stator tooth are each provided with at least one small slot, and therefore, a plurality of inner modulation teeth and outer modulation teeth can be formed. According to the high-power-density hub motor structure of the invention, the output torque and the power density of the motor can be improved under the condition that the stack length and the outer diameter of the hub are not changed.

Description

technical field [0001] The invention belongs to the technical field of hub motors, and in particular relates to a structure of a hub motor with high power density. Background technique [0002] With the development of motor technology, there are higher requirements for the output capacity of hub motors used in electric vehicles. When electric vehicles start with heavy loads or climb slopes, the motors need to provide greater power. The traditional outer rotor hub motors can ensure the When the outer diameter remains unchanged, the output torque of the motor can only be rapidly increased by increasing the stack length, but the increase in the stack length increases the axial size of the hub motor, which affects the installation space of the motor on the vehicle. [0003] The structure of the existing in-wheel motor is the hub, the rotor, the stator, the bracket, and the rotating shaft. Due to the large diameter of the air gap between the stator and the rotor, the correspondin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K16/02H02K1/30H02K1/28H02K1/27H02K1/16H02K3/12H02K3/28
CPCH02K16/02H02K1/30H02K1/28H02K1/278H02K1/165H02K3/12H02K3/28H02K2213/03
Inventor 孙木楚
Owner 台铃科技(江苏)股份有限公司
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