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。

To guarantee safe commutation, a four stepped switching strategy is realized by using programmable logic devices.

youdao

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。

To guarantee safe commutation, a four stepped switching strategy is realized by using programmable logic devices.

youdao