Based on the requirement of magnet power supply performance,a PS-FB-ZVZCS PWM circuit with saturated inductor and its design principle of several key parameters is introduced.

• 基于高精度高稳定度磁铁电源的要求,文章采用ZVZCS移相全桥主电路设计方案,给出了电路中关键参数的设计方法,并试制了一台样机。