永磁交流真空接触器的线圈控制单片机源程序，供大家参考学习，理解永磁开关是如何控制的时序问题。-Permanent magnet AC vacuum contactor coil of single-chip microcomputer to control the source code for your learning, understanding how to control permanent magnet switch is

电动机保护程序发以及PCB和原理 图，可作参考。。。(Motor protection program, as well as PCB and schematic diagram, can be used for reference...)