As for the issue of trigger reliability of present MCR type magnetically controlled reactor

the design idea on the zero-crossing detection circuit and the driving circuit of thyristor for type MCR magnetically controlled reactor is introduced in detail

the hardware design is optimized

and its reliability analysis is performed in detail. The proposal on improving the driving reliability of thyristor is raised by way of studying and analyzing the amplitude and width of the trigger pulse. The experimental results show that both the zero detection circuit and the thyristor driving circuit designed in this paper solves the issue of time reference of the thyristor trigger signal

thus assuring the performance superiority of type MCR magnetically controller reactor.