摘要
纯电动汽车逆变器中的直流支撑电容器性能很大程度上决定了电驱动系统的性能优劣,主要表现在处理直流侧纹波电流和电压的能力上。研究不同驱动工况下的纹波情况有助于电容器的优化选型,进而提高电驱动系统的可靠性。文章从SVPWM调制方式出发,基于其隐含调制函数对中间电路直流侧纹波电流和纹波电压计算公式进行了推导,并分析了不同运行条件下直流侧纹波电流和电压的情况。
The performance of electric drive system for electric vehicle largely depends on the characteristics of DC-link capacitor in inverter, especially the abilities to absorb ripple current and ripple voltage of DC-link. Research on the ripple status of capacitor under different driving conditions is better for the optimal selection of capacitors and the reliability of driving system. Based on the SVPWM modulation mode and its latent modulation wave function, the calculation formulas of ripple current and ripple voltage of DC-link capacitor were deduced and analyzed under different operation conditions.
出处
《大功率变流技术》
2015年第3期47-50,67,共5页
HIGH POWER CONVERTER TECHNOLOGY
