To guarantee safe commutation, a four stepped switchingstrategy is realized by using programmable logic devices.
主电路采用反向串联的双向IGBT开关，用可编程逻辑元件实现四步切换，以保证安全换流。
2
For all disturbances which the upper bounds are unknown, the tracking errors decrease uniformly asymptotically to zero by the designing of switchingstrategy.
通过设计切换律，对于具有未知上界的干扰，保证跟踪误差一致渐近趋于零。
3
From the generation principle of switched reluctance generator (SRG), two methods of enhancing output power were introduced, and a new switchingstrategy was focused on.