晶闸管交流调压器的全数字触发

A FULL DIGITAL CONTROLLED TRIGGER FOR THREE PHASE THYRISTOR AC REGULATOR

研究了以微处理器为基础的晶闸管交流调压器的触发控制．采用软件锁相环倍频的方法，由单相电源信号实现触发脉冲的电源同步，既提高了触发器的抗干扰能力，又改善了三相触发脉冲的对称性．根据电源同步信号与晶闸管触发脉冲在正、逆两种不同相序情况下的对应关系，由软件控制产生不同顺序的６个触发脉冲，实现了相序自适应触发．

A full digital controlled pulse generator for three phase thyristor AC regulator based on microprocessor is studied.By using software PLL frequency multiplier method, the pulse synchronization by single phase volt signal is realized whitch not only enhances the ability of antiinterference of the system but also improves the symmetry of three phase triggering pulse. According to the different relationship between the synchronization signal and the triggering pulse in the case of A-B-C or C-B-A phase sequence, a selfadaptive pulse generating algorism is proposed.