Patent ID: 6108224
Filing Date: 2000-08-22
Classification: H02M

Abstract:
A thyristor phase-shift trigger circuit, comprising a synchronous signal sampling circuit for receiving synchronous signal from a main circuit; a waveform shaping, integrating and comparator circuit for processing said received synchronous signal to generate a rectangular wave phase-shift signal; a high frequency modulation pulse distributor circuit for modulating said rectangular wave phase-shift signal to a high-frequency signal; a power-amplification and high-frequency pulse rectifier output circuit for conducting power amplification and rectification of said modulated high frequency signal, and forming the triggering signal required by the thyristor, characterized in that, said synchronous signal sampling circuit comprises a transformer, wherein its primary winding is connected with the main circuit, its secondary winding and a capacitor compose a LC resonance circuit for selecting synchronous signal from the main circuit.