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来源：百度知道 编辑：UC知道 时间：2024/06/16 11:37:18
出发脉冲必须和电机环电压同步是相触发电路的基本要求，本系统采用了单相同步电路，由电阻和电容组成的相跳转电路具有滤波的功能，同时还能调节同步信号的启动时间。这个电路的目的在于修复触发脉冲和电机环电压补偿相差，PLC中的时间控制器对其进行设置。
系统应用相跳换控制模式以实现数字触发单元。首先同步电路支持晶体管的自然相转换时刻，它被用做计算起相跳转曲线角a的始时刻，其次，根据相跳转控制电压Uk，时间控制连续计算，然后电路在设定的时间识别相位并选择晶体管。如果控制电压Uk改变了，时间连续量也改变，如此实现了相跳换。
Basic 3.2 synchronisms signal checking up must prepare electric motor ring voltage being to look at and appraise trigger circuit synchroly as measuring the pulse starting off has demanded , this system has adopt the single phase synchronism circuit , the appearance being composed of electric resistance and capacitance has jumped to rotate a circuit having the wave filtering function , can adjust synchronism signal starting time at the same time. This circuital purpose depends on the voltage restoring trigger pulse and the electric motor ring compensates a phase difference , time controller in PLC interposes to whose go along. System application springs to change under the control of pattern to realize a figure triggering an element each other. The synchronism circuit is supported natural transistor appearance to change moment first , it to be used as the moment , secondary calculating up the beginning jumping revolution of curve angle a each other , Uk , duration control are continu