To reduce the EMI,reverse reset of the diode are studied,and design way about spike-killers and saturable inductors witch can suppress voltage and current spikes are showed.

• 为了减小电磁干扰，本文对整流二极管的反向恢复问题进行了研究，给出了尖峰抑制器的设计方法，解决了二极管上电压、电流的尖峰和振荡问题。