串级调速系统的主要组成部分是线绕式异步电动机，三相桥式整流器和三相可控硅逆变器。
A cascade speed control system mainly consists of a wound asynchronous motor, a three-phase rectifier and a three-phase thyristor (?) inverter.
无刷交流励磁机为旋转电枢式的同步发电机，旋转整流器为模块式的三相整流桥。
AC brushless synchronous excitation generator is a rotating-armature synchronous generator, which has a module of three-phase rectification bridge.
本文首次将滑模变结构控制应用于H型桥式DC-DC变换器、三相整流器和三相逆变器中。
SMVSC is firstly applied to H-model bridge DC-DC converter, three-phase rectifier and three-phase inverter in this paper.
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