装甲车辆大功率电驱动系统传导干扰预测模型构建方法

Construction Method of Conducted Interference Prediction Model for High Power Electric Drive System of Armored Vehicle

装甲车辆动力系统大功率电驱动系统中开关模组的高速切换将产生一系列高压瞬态脉冲及宽频谐波干扰,对高度电气化的整车系统构成严峻威胁。针对大功率电驱动系统产生的传导干扰缺乏数字化检测及分析问题,提出一种系统级的传导干扰预测模型构建方法。对电驱动系统各电气部件例如高压电池组、逆变器、负载电机分别独立建模;基于多导体传输线方法,将各模型通过表征系统寄生效应的传输线进行级联,进而构成完整的分布式系统级传导干扰预测模型。通过测试台架对新提出的模型进行精度测试对比验证。对比验证结果表明,新构建的模型在10 kHz~100 MHz频段范围内仿真精度优于8 dB,可为电驱动装甲车辆的电磁兼容正向设计提供有效支撑,具备创新性及实用性。

The high-speed switching of switch modules in the high-power electric drive system of armored vehicle power system will generate a series of high-voltage transient pulses and broadband harmonic interference,thus posing a serious threat to the highly electrified vehicle system.A system level constructing method for a conducted interference prediction model is proposed to address the lack of digital detection and analysis of conducted interference generated by high-power electric drive systems.Firstly,the models of electrical components,such as high-voltage battery pack,inverter,and load motor,of the electric drive system are constructed independently;secondly,based on the multi-conductor transmission line method,each model is cascaded through transmission lines that characterize the parasitic effects of the system,thereby forming a complete distributed system-level conducted interference prediction model;and finally,the accuracy of the proposed prediction model is test and verified through bench test.The verified results indicate that the proposed prediction model has a simulation accuracy of better than 8 dB in the frequency range of 10 kHz to 100 MHz,which can provide effective support for the forward design of electromagnetic compatibility of electric drive armored vehicle,and is innovative and practical.