摘要
针对某纯电动汽车在下线路试中高荷电状态(SOC)下出现制动失速、低SOC情况下满油门加速出现顿挫的问题,经分析确认是逆变器软件谐波注入电流信号参数不合理引发整车电网络系统的谐振,从而导致单体电芯电压跳变所致。对整车电网络系统谐振问题进行分析,建立整车电网络模型,计算谐振点,并优化了谐波注入策略,实车验证结果表明,采用优化策略时单体电芯电压跳变较小,且未引发新的NVH问题。
In the road test,an electric vehicle was found brake stall under high SOC,and paused under low SOC when it was running at full throttle,it was found and confirmed that irrational current signal parameters injected by the harmonics of the inverter software triggered resonance of the vehicle electrical network,which caused voltage jump.The resonance was analyzed,and a vehicle electrical network model was established,and the resonance point was calculated,the harmonic injection strategy was optimized.Vehicle test shows that under the new strategy,the voltage jump has been reduced and it does not cause new NVH problems.
作者
陈石人
黄勇
肖曦
杨凡
舒朝雷
Chen Shiren;Huang Yong;Xiao Xi;Yang Fan;Shu Chaoei(Weima Motor Technology Group Co.,Ltd.,Chengdu 610000)
出处
《汽车工程师》
2023年第11期19-24,共6页
Automotive Engineer
关键词
谐波注入
基尔霍夫电流定律
谐振点
整车电网络
纯电动汽车
Harmonic injection
Kirchhoff’s current law
Resonance point
Vehicle electrical network
Pure electric vehicle
