A high power density in-wheel motor structure

A high power density, hub motor technology, applied in the direction of magnetic circuit shape/style/structure, winding conductor shape/style/structure, electromechanical devices, etc., can solve the problem of high vibration and noise, insufficient motor torque density and power density, etc. problem, to achieve the effect of reduced copper loss, convenient and fast processing and manufacturing, and increased air gap area
CN113131700BActive Publication Date: 2022-03-22台铃科技(江苏)股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
台铃科技(江苏)股份有限公司
Publication Date
2022-03-22

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Abstract

The invention discloses a high power density in-wheel motor structure, which includes an outer rotor, a stator, an inner rotor and a hub arranged coaxially, the outer rotor and the inner rotor are connected by a fixed bracket, the outer rotor includes an outer rotor iron core and a A plurality of V-shaped magnetic steel grooves are evenly arranged on the outer rotor core in the circumferential direction, and a straight magnetic steel groove is arranged between two adjacent V-shaped magnetic steel grooves; each magnetic steel groove is embedded with a permanent magnet, and the outer rotor The outer circumference of the iron core is fixed to the hub; the stator is provided with inner stator teeth and outer stator teeth respectively, and inner stator slots and outer stator slots are respectively arranged between adjacent inner stator teeth and outer stator teeth; inner stator slots and A set of concentrated windings are respectively arranged in the outer stator slots, and the two sets of concentrated windings are connected in series; at least one small slot is provided at the end of each inner stator tooth and outer stator tooth to form a plurality of inner modulation teeth and outer modulation teeth. With the invention, the output torque and power density of the motor can be improved without changing the length of the stack and the outer diameter of the hub.
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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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