基于马尔可夫过程的电动汽车电驱动系统共模干扰抑制方法研究  

Research on Common Mode Interference Suppression Strategy for Automotive Electric Drive Systems Based on Markov Process

作　　者：张长勇[1] 陈炟名 张云蕾 Zhang Changyong;Chen Daming;Zhang Yunlei(Civil Aviation University of China,Tianjin 300300;CATARC New Energy Vehicle Test Center(Tianjin)Co.,Ltd.,Tianjin 300300)

机构地区：[1]中国民航大学,天津300300 [2]中汽研新能源汽车检验中心(天津)有限公司,天津300300

出　　处：《汽车技术》2025年第1期41-47,共7页Automobile Technology

基　　金：民航首台(套)重点项目(3122023PY04)。

摘　　要：针对电动汽车电驱动系统的共模干扰问题,提出了一种基于马尔可夫(Markov)过程的三段式伪随机载波频率等效零矢量脉宽调制(PRF-AZSPWM)策略。在等效零矢量作用的基础上,该策略引入双态Markov链生成随机合成信号,使载波频率在一定范围内随机变化,同时选择合适的传递概率,将谐波能量扩展到更宽的频率范围。仿真结果表明,提出的方案有效降低了电驱动系统的共模干扰水平,并通过样机试验进一步证明了提出策略的有效性。A three-segment Pseudo-Random Frequency Active Zero State Pulse Width Modulation(PRF-AZSPWM)strategy based on Markov process is proposed to address the common mode interference problem in electric vehicle electric drive systems.Based on the equivalent zero vector effect,this strategy introduces a binary Markov chain to generate random synthetic signals,allowing the carrier frequency to vary randomly within a certain range,while selecting appropriate transmission probabilities to spread the harmonic energy to a wider frequency range.The simulation results show that the proposed scheme effectively reduces the common-mode interference level of the electric drive system,and the effectiveness of the proposed strategy is further confirmed through prototype testing.

关 键 词：电动汽车 电驱动系统 共模干扰 伪随机 马尔可夫过程 

分 类 号：TM464[电气工程—电器]