电动汽车充电器直流滤波器的设计

摘要

电动汽车用动力蓄电池组对充电电流纹波极其敏感,但是其本身具有反电动势,内阻极小,容易使充电器输出的充电电流纹波过大.针对以上问题,从滤波器抑制电流纹波的算法,快速响应能力以及输出的可调范围三个方面,对电动汽车充电器的直流滤波器的设计方法进行了讨论,并通过仿真验证了设计方案的合理性和可行性.%The power accumulator battery in the electric automobile is extremely sensitive to the charging current ripple. But itself has tiny inner resistance and opposing electromotive force, little charge/discharge voltage fluctuation will cause large charge current ripple. This paper discussed the DC/DC filter design method of the electric automobile charger based on three aspects: restraining the charging current ripple, increasing the response speed and variable range of output. Simulations proved that the filter design method is reasonable and feasible.