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分析一种新的移相方法，详细介绍了一种以８９Ｃ２０５５１单片机为核心的三相整流触发电路，硬件电路原理及软件的工作过程。该电路结构简单、成本低、调试容易．
A new phase shift method is analyzed. A three-phase rectifier trigger circuit based on 89C20551 single-chip microcomputer is introduced in detail. The working principle of the hardware circuit and the working process of the software are introduced. The circuit structure is simple, low cost, easy to debug.