Development of Three Phase Thyristor Trigger Circuit Based on AVR

This paper gives an introduction of digital phase shift trigger circuit that can be applied to three phase thyristor trigger circuit or inverse circuit.The core of the circuit is AVR(Atmega16)single-chip microcomputer.Trigger pulses that it produces is high stable and reliable,and it don't need the simultaneous synchronous transformer.The paper makes a detailed description of working principle and key problems.The practice proves that the circuit is simple and stable.The anti-jamming ability is strong.