...three-phase inverter bridge circuit; three-phase combined inverter bridge circuit. [gap=73]关键词：正弦脉冲宽度调制(SPWM)；查表法；三相桥式逆变电路； 组合式三相逆变电路。
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This main circuit is composed of the three-phase fully-controlled bridge using GTO and the single-phase bridge inverter using IGBT.
该主电路采用晶闸管三相全控桥整流电路，IGBT单相全桥逆变电路。
The main loop includes a three-phase bridge, an inverter module with three IGBT power tubes, a braking circuit and protecting circuits, etc.
系统主回路含三相全波整流桥电路，三对IGBT功率管组成的逆变器电路，制动电路及保护电路等。
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