摘要
针对某纯电动汽车出现的辐射发射谐振问题,聚焦14.2 MHz与25.6 MHz附近的典型谐振现象,通过构建包含多合一高压系统与车身结构的一体化场路协同仿真模型,分析了谐振产生机理。研究表明:14.2 MHz谐振主要由高压直流线缆的分布电感与对地电容构成的结构性谐振引起;25.6 MHz谐振则源于动力电池端口接地阻抗网络中寄生参数所激发的局部串联谐振。在谐振频段,仿真结果与实测数据吻合,有效验证了模型的预测能力。在此基础上,从线缆结构优化与接地系统改进两方面提出了抑制策略,通过仿真验证,抑制策略可分别降低14.2 MHz、25.6 MHz的谐振幅值8.2 dB、32.1 dB。
To address the radiated emission resonance observed in a battery electric vehicle,this study focuses on the typical resonance phenomena occurring around 14.2 MHz and 25.6 MHz.An integrated field–circuit co-simulation model incorporating the multi-in-one high-voltage system and the vehicle body structure is established to investigate the resonance mechanism.The results indicate that the resonance at 14.2 MHz is primarily caused by structural resonance formed by the distributed inductance of the high-voltage DC cable and its capacitance to ground,whereas the resonance at 25.6 MHz originates from a local series resonance excited by parasitic parameters within the grounding impedance network at the traction battery port.In the resonant frequency band,the simulation results show good agreement with the measured data,effectively demonstrating the model's predictive capability.Based on the identified mechanism,suppression strategies are proposed from the perspectives of cable structure optimization and grounding system improvement.Simulation verification demonstrates that the proposed measures can reduce the resonance amplitudes at 14.2 MHz and 25.6 MHz by 8.2 dB and 32.1 dB.
作者
黎磊鑫
王洪超
周峰
汪弘毅
高红伟
高洪民
翟丽
Li Leixin;Wang Hong chao;Zhou Feng;Wang Hongyi;Gao Hongwei;Gao Hongmin;Zhai Li
出处
《安全与电磁兼容》
2026年第1期50-56,64,共8页
Safety & EMC
基金
国家重点研发计划(2022YFB2502702)。
关键词
电动汽车
多合一高压系统
电磁兼容
辐射发射
谐振机理
electric vehicle
multi-in-one high-voltage system
electromagnetic compatibility(EMC)
radiated emission
resonance mechanism
