One of the most widely used rectifier circuits in industry, as shown in overview Figure b. The essence is that the three thyristors connected to a three-phase half-wave controllable rectifier circuit 135462 with a group of common cathode and a group of common anode are respectively VT, VT, VT, VT, and the three thyristors connected to A, b, e three-phase power supply in the common anode group are respectively VT, VT, VT. Three-phase bridge fully controlled rectifier circuit must be triggered by double narrow pulse or wide pulse, the phase shift range is 0°~120°, and the maximum on-angle is 120°. It is mainly used for high voltage control requirements or inverter occasions.