Aiming at the problem of electromagnetic compatibility caused by the high-voltage electric drive system (HEDS) in electric vehicles, a model of the HEDS based on the vehicle is established to predict conducted electromagnetic interference (EMI) of the HEDS. First, the electromagnetic environment inside electric vehicles is analyzed theoretically. Then, the various parts of the HEDS are accurately modeled, which include the power buses, inverter, and motor. Based on the theory of multiconductor transmission line, a generic model of power buses suitable for two screening designs is presented. In order to accurately simulate the operating characteristics of the inverter, the drive circuit and the parasitic parameters of the dc-link capacitor block and the insulated gate bipolar transistor module are considered. The motor model takes into account the low-impedance antiresonance phenomenon in the measured motor impedance. Finally, the HEDS is simulated with PSPICE 16.6, and the simulation results agree well with the experimental measurements. The proposed model can accurately predict the system-level conducted EMI of the vehicle-mounted HEDS up to 100 MHz, with an error of 4 dB or less at almost all frequencies below 56 MHz and less than 7 dB at most frequencies in the 56–100 MHz.

中文翻译：

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电动汽车高压电驱动系统的系统级传导 EMI 建模


针对电动汽车高压电驱动系统(HEDS)引起的电磁兼容问题，建立了基于整车的HEDS模型，预测HEDS的传导电磁干扰(EMI)。首先对电动汽车车内电磁环境进行理论分析。然后，对 HEDS 的各个部分进行精确建模，包括电源总线、逆变器和电机。基于多导体传输线理论，提出了一种适用于两种屏蔽设计的电源总线通用模型。为了准确模拟逆变器的工作特性，需要考虑驱动电路以及直流母线电容器块和绝缘栅双极晶体管模块的寄生参数。电机模型考虑了测量电机阻抗中的低阻抗反谐振现象。最后利用PSPICE 16.6对HEDS进行仿真，仿真结果与实验测量吻合较好。所提出的模型可以准确预测高达 100 MHz 的车载 HEDS 的系统级传导 EMI，在 56 MHz 以下的几乎所有频率上误差为 4 dB 或更小，在 56-56 MHz 的大多数频率上误差小于 7 dB。 100兆赫。