Engine: Electricity

1. A both the bridge rectifier and the controller inverter bridge are thyristor controlled in terms of switching
2. B the bridge rectifier is uncontrolled and the controller inverter bridge is transistor controlled in terms of switching
3. C both the bridge rectifier and the controller inverter bridge are transistor controlled in terms of switching
4. D the bridge rectifier is uncontrolled and the controller inverter bridge is thyristor controlled in terms of switching

Tip: press A-D to answer