关键词: 扁线电机；集肤效应；交流电阻增加系数；有限元计算

Abstract: In order to study the sensitivity of skin effect on the number of flat wire layers and its impact on the high-speed efficiency of new energy vehicle flat wire drive motors, a motor with a peak power of 220 kW and a rated power of 90 kW is selected as the research object in this paper. By combining analytical calculation and finite element calculation methods, the resistance increase coefficients of each winding conductor based on four, eight layers of windings are comprehensively analyzed, as well as the influence of skin effect on the motor under high-speed operating conditions. Through the comparison of analytical method and finite element calculation, it is concluded that the calculation results of the two methods are similar, with the same trend. The results show that as the speed increases, the skin effect has a significant impact on the efficiency and heating of the motor. The current increases radially along the motor towards the slot position, causing the temperature rise of the winding conductor at the slot position to increase. Furthermore, it significantly increased the rotor temperature, providing a certain reference for the design and optimization of flat wire drive motors for new energy vehicles.

Key words: Flat wire motor; Skin effect; Coefficient of increase in AC resistance; Finite element calculation