The DC active filter (DAF), with very low current ripple, of the stable power supply system of high magnetic field device is developed by using the PWM and parallel active power filter technique.

• 摘要对稳态强磁场装置电源所需的直流有源滤波器(DAF)进行了设计，提出了利用PWM及并联有源滤波技术的滤波方案。