Three Phase Converter

This kit consists of a power circuit and a firing circuit. Firing circuit can either be analog based or microcontroller based.

POWER CIRCUIT:

This unit consists of 6 SCRs and 3 power diodes all mounted on heat sink and provided snubber protection. The devices can be connected as half bridge or full bridge configuration. An additional freewheeling diode is also provided. A circuit breaker is provided to enable or disable 3 phase supply to the power circuit safely. Voltmeter and Ammeter are provided for reading voltage and current. This unit can be used for R,R-L and motor load. 

The connections are brought out to front panel via terminals and the entire setup is enclosed in a powder coated MS box.

FIRING CIRCUIT:

A three phase converter can either be fired from an analog firing circuit or a microcontroller firing circuit.

Analog firing circuit:

This unit generates three phase synchronized and isolated gate pulses for the 6 thyristors connected in different configurations like three phase half bridge converter, three phase full bridge converter, AC phase control circuit etc. The firing circuit is based on ZCD, ramp generator, op amp comparator and pulse transformer isolation method. Test points are provided to monitor RYB phase sequence and to study logic circuit.

Microcontroller firing circuit:

This unit also generates three phase synchronized and isolated gate pulses for 6 thyristors. The firing circuit is based on programmable microcontroller. Display is provided to indicate firing angle. Firing angle can be varied between 180 to 0 degree by using switches provided.

Both firing circuits work on 230V AC mains and are enclosed in powder coated MS box.