发布日期:2022-04-18 点击率:73
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该电路采用时间继电器来控制转子电阻的分断切除。
合上QS,按下SB1,结果如下
1)KM1线圈得电,触头(1-3)闭合自锁;KM1线圈得电→KM1触头闭合→电动机M开始起动(R1、R2串入)运转;KM1(1-5)触头闭合→KT1线圈通电→KT1(1-7)触点延时闭合。
2)KM2线圈得电→KM2主触头闭合→R1被短接(切除);KM2(1-9)触头闭合→KT2线圈通电→KT2(1—1 1)触点延时闭合。
3)KM3线圈通电→KM3主触头闭合→m被短接(切除)→起动过程结束。
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