Develop of High Performance Direct-driven In-wheel Motor for Electric Vehicle

doi:10.3901/JME.2019.22.005

Abstract

Abstract: Direct-driven in-wheel motor is widely concerned because of its advantages as a solution to distributed power vehicles. However, in-wheel motor has high performance requirements and complex multi-field coupling effects which cause the high difficulty on design and manufacturing. There are few high performance in-wheel motors in China. To overcome these challenges, the method of joint design of mechanic, electric, thermal and magnetic multi-physics is proposed to be applied to the design of direct drive hub motor. Through applying the technology of segmented stator core, over-molding technology of the hybrid bobbing, precision winding technology, high thermal conductivity potting technology, integral potting process, lightweight structural design, high line speed oil seal technology, etc., a high performance in-wheel motor was developed. The motor achieved high torque density of 21.3 N·m/kg and high power density of 2.2 kW/kg which can be compared with international advanced level, the result proved the effectiveness of the method and related techniques.

Key words: in-wheel motor, multi-physics domain joint design, segmented stator core, hybrid bobbin, potting

CLC Number:

TM351

YING Hongliang, HUANG Surong, ZHANG Qi, ZHENG Yang, LI Zhen. Develop of High Performance Direct-driven In-wheel Motor for Electric Vehicle[J]. Journal of Mechanical Engineering, 2019, 55(22): 5-10.

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