高电压技术2024，Vol.50Issue(11)：5014-5021,8.DOI:10.13336/j.1003-6520.hve.20231420
脉宽调制电压下频率对电动汽车驱动电机绝缘耐电晕寿命影响
Impact of Frequency on the Endurance Lifetime of Electric Vehicle Drive Motor Insulation with Pulse Width Modulation Voltage
摘要
Abstract
The insulation systems of electric vehicles driven by pulse width modulation(PWM)technology are subjected to severe high-frequency PWM voltages.The fundamental frequency and carrier frequency are critical parameters of the PWM voltage.This paper establishes a high-frequency endurance testing platform to investigate the effects of varying fundamental and carrier frequencies on the partial discharge distribution characteristics and insulation endurance lifetime of the magnet wire in electric vehicle drive motors.The test results and analysis indicate that,under PWM voltage,partial discharges are primarily concentrated at the points of fundamental polarity reversal,exhibiting an asymmetric distribution.A frequency-lifetime inverse power model was used to fit the endurance lifetime so as to obtain the predictive models of different fundamental frequencies and carrier frequencies with endurance lifetime.The results show that the endurance lifetime of the samples decreases exponentially with increasing fundamental and carrier frequencies.When the funda-mental frequency is constant,the voltage endurance lifetime curves at different carrier frequencies exhibit a parallel trend after inverse power transformation.Thus,the coupling interaction between the fundamental frequency and carrier fre-quency can be considered as a vertical shifting constant factor in the frequency-lifetime inverse power model.This research is expected to provide both experimental and theoretical supports for testing the endurance lifetime of electric vehicle motor insulation.关键词
脉宽调制/电动汽车/耐电晕寿命/基波频率/载波频率Key words
pulse width modulation/electric vehicle/endurance lifetime/fundamental frequency/carrier frequency引用本文复制引用
彭增,王鹏,朱英伟,于超凡,赵安然,林熙云..脉宽调制电压下频率对电动汽车驱动电机绝缘耐电晕寿命影响[J].高电压技术,2024,50(11):5014-5021,8.基金项目
国家自然科学基金(51977134) （51977134）
四川省科技计划项目(2021YFG0351).Project supported by National Natural Science Foundation of China(51977134),Science and Technology Program of Sichuan Province(2021YFG0351). （2021YFG0351）
