What is the principle of three-phase zero rectifier circuit?

Principle of three-phase zero rectifier circuit

Three-phase zero rectifier circuit is a kind of circuit used to convert alternating current into direct current. It consists of three half-bridges, and each half-bridge consists of a thyristor and an ordinary rectifier diode.

When the input voltage of the power supply is positive, the anode of the thyristor is grounded and the cathode of the thyristor is connected to the power supply. At this time, the thyristor will be turned on, and so will the ordinary rectifier diode. At this time, the current will flow from the anode of the thyristor to the cathode of the common rectifier diode, thus forming a forward current.

When the input voltage of the power supply is negative, the anode of the thyristor is connected to the power supply, and the cathode of the thyristor is grounded. At this time, the thyristor will be turned on, and so will the ordinary rectifier diode. At this time, the current will flow from the cathode of the thyristor to the anode of the common rectifier diode, thus forming a negative current.

Because the thyristor in the three-phase zero rectifier circuit can control the direction of current, it can convert alternating current into direct current, and can control the forward and backward flow of direct current, thus realizing the adjustment and control of power.