微机控制三相半控桥整流的数字式触发器

本文介绍一种用微机控制三相半控桥整流装置的方法，微机直接通过８２５３计数／定时器进行触发脉冲移相控制，同步信号数字化以来三相触发脉冲相位对称，数字控制量通过查表法快速求出对应移相角的计数初值，从而构成数字式触发器。分析和应用表明，数字式触发器优于模拟式触发器。

USING MICROCOMPUTER CONTROLLED DIGITAL TRIGGER OF THREE-PHASE SEMI-CONTROLLED BRIDGE RECTIFIER

This paper describe a method of microcompuer controlling for three-phase semi-ocntrolled bridge rectifer. The microcomputer-direct control 8253 counter/timer to realize the phase shifting of thyirstor trigger pulses. Synchronizing sisnals are digitized,so that three phase of the trigger pulses are Symmetrized accurately. The table inquirying method is adopted in the programe to seek initial count data puting in 8253according to digital control data. Thus,the digital trigistor is formed. From analysis and application, it is indicated that digital trigistor has the advantage over analog trigistor.