绕线转子异步电动机的控制线路.ppt

手动控制串联电阻降压启动 电路组成分析 m3 l1l2l3 fu1 fu2 km1 km2 kh sb1 sb2 km1 km2 km1 km2 kh u v w qs km2 kt km1 2 时间继电器控制串联电阻降压启动 kt 课题七绕线转子异步电动机的控制线路 yr系列符号 绕线转子三相异步电动机 可以通过滑环在转子绕组中串接电阻来改善电动机的机械特性 从而达到减小启动电流 增大启动转矩以及调节转速的目的 1 按钮操作控制线路 l1l2l3 fu1 km1 fu2 fr sb5 qs sb1 km2 km3 km km1 km3 km2 km1 km3 km2 km r1 r2 r3 fr sb2 sb3 sb4 电路组成分析 km l1l2l3 km1 sb5 sb1 km2 km3 km km1 km3 km2 km1 km km3 km2 km r1 r2 r3 sb2 sb3 sb4 合上qs按下sb1绕线转子串联全部电阻启动 fu1 fu2 qs fr fr l1l2l3 km1 sb5 sb1 km2 km3 km km1 km3 km2 km1 km km3 km2 km r1 r2 r3 sb2 sb3 sb4 按下sb2km1线圈得电km1触头闭合绕线转子串联r2 r3启动 fu1 fu2 qs fr fr l1l2l3 km1 sb5 sb1 km2 km3 km km1 km3 km2 km1 km km3 km2 km r1 r2 r3 sb2 sb3 sb4 按下sb3km2线圈得电km2触头闭合绕线转子串联r3启动 fu1 fu2 qs fr fr l1l2l3 km1 sb5 sb1 km2 km3 km km1 km3 km2 km1 km km3 km2 km r1 r2 r3 sb2 sb3 sb4 按下sb4km3线圈得电km3触头闭合绕线转子切除全部电阻运行 fu1 fu2 qs fr fr l1l2l3 km1 sb5 sb1 km2 km3 km km1 km3 km2 km1 km km3 km2 km sb2 sb3 sb4 松开sb4电动机继续运行 r1 r2 r3 fu1 fu2 qs fr fr 2 时间继电器自动控制线路 l1l2l3 fu1 km1 fu2 fr sb2 qs sb1 km2 km3 km km kt3 km3 km2 km1 km3 km2 km1 km r1 kt1 kt2 kt3 r2 r3 km km1 km2 km3 km3 kt1 kt2 fr 电路组成分析 l1l2l3 sb2 sb1 km3 km km kt3 km2 km1 km3 km2 km1 r1 r2 r3 km km1 km2 km3 km3 kt1 kt2 合上qs按下sb1km线圈得电 km1 km2 km3 km kt1 kt2 kt3 fu1 fu2 fr qs fr l1l2l3 m3 sb2 sb1 km3 km km kt3 km2 km1 km3 km2 km1 r1 r2 r3 km km1 km2 km3 km3 kt1 kt2 km触头闭合绕线转子串联全部电阻启动kt1线圈得电 km1 km2 km3 km kt1 kt2 kt3 fu1 fu2 fr qs fr l1l2l3 m3 sb2 sb1 km3 km km kt3 km2 km1 km3 km2 km1 r1 r2 r3 km km1 km2 km3 km3 kt1 kt2 kt1延时闭合触头闭合km1线圈得电 km1 km2 km3 km kt1 kt2 kt3 fu1 fu2 fr qs fr l1l2l3 m3 sb2 sb1 km3 km km kt3 km2 km1 km3 km2 km1 r1 r2 r3 km km1 km2 km3 km3 kt1 kt2 km1触头闭合绕线转子串联r2 r3启动kt2线圈得电 km1 km2 km3 km kt1 kt2 kt3 fu1 fu2 fr qs fr l1l2l3 m3 sb2 sb1 km3 km km kt3 km2 km1 km3 km2 km1 r1 r2 r3 km km1 km2 km3 km3 kt1 kt2 kt2延时闭合触头闭合km2线圈得电 km1 km2 km3 km kt1 kt2 kt3 fu1 fu2 fr qs fr l1l2l3 m3 sb2 sb1 km3 km km kt3 km2 km1 km3 km2 km1 r1 r2 r3 km km1 km2 km3 km3 kt1 kt2 km2触头闭合绕线转子串联r3启动kt3线圈得电 km1 km2 km3 km kt1 kt2 kt3 fu1 fu2 fr qs fr l1l2l3 m3 sb2 sb1 km3 km km kt3 km2 km1 km3 km2 km1 r1 r2 r3 km km1 km2 km3 km3 kt1 kt2 kt3延时闭合触头闭合km3线圈得电 km1 km2 km3 km kt1 kt2 kt3 fu1 fu2 fr qs fr l1l2l3 m3 sb2 sb1 km3 km km kt3 km2 km1 km3 km2 km1 r1 r2 r3 km km1 km2 km3 km3 kt1 kt2 km3触头闭合绕线转子切除全部电阻运行 km1 km2 km3 km kt1 kt2 kt3 fu1 fu2 fr qs fr l1l2l3 m3 sb2 sb1 km3 km km kt3 km2 km1 km3 km2 km1 r1 r2 r3 km km1 km2 km3 km3 kt1 kt2 km3动断触头断开kt1线圈失电kt1触头断开km1线圈失电km1触头断开kt2线圈失电kt2触头断开电动机继续运转 km1 km2 km3 km kt1 kt2 kt3 fu1 fu2 fr qs fr 思考 km1 km2 km3的常闭触点的作用 接触器 km2 km3 km4的常闭触头串联在km1线圈回路中的作用 保证电动机在转子回路中电阻全部加入的条件下才能起动 当km2 km3 km4的任一个常闭触头因熔焊或其它原因没有恢复闭合时 km1线圈因无通路而不能获电 3 电流继电器自动控制电路 l1l2l3 fu1 3 fu2 fr sb2 qs sb1 km km ka1 km2 km r2 r1 ka2 fr ka1 ka km3 ka3 r3 ka3 km1 km1 km2 km3 ka2 ka km km1 km2 km3 电路组成分析 l1l2l3 fu1 3 sb2 sb1 km km ka1 km2 km r2 r1 ka2 ka1 ka km3 ka3 r3 ka3 km1 km1 km2 km3 ka2 ka km km1 km2 km3 合上qs按下sb1km线圈得电 fu2 fr qs fr l1l2l3 fu1 3 sb2 sb1 km km ka1 km2 km r2 r1 ka2 ka1 ka km3 ka3 r3 ka3 km1 km1 km2 km3 ka2 ka km km1 km2 km3 km触头闭合绕线转子串联全部电阻启动k 线圈得电 fu2 fr qs fr l1l2l3 fu1 3 sb2 sb1 km km ka1 km2 km r2 r1 ka2 ka1 ka km3 ka3 r3 ka3 km1 km1 km2 km3 ka2 ka km km1 km2 km3 ka动合触头闭合因启动电流大 ka1 ka2 ka3的动断触头断开 继续串联全部电阻启动 fu2 fr qs fr l1l2l3 fu1 3 sb2 sb1 km km ka1 km2 km r2 r1 ka2 ka1 ka km3 ka3 r3 ka3 km1 km1 km2 km3 ka2 ka km km1 km2 km3 因速度加快 电流减小 ka1欠电流 动断触头闭合km1线圈得电km1触头闭合串联r2 r3继续启动 fu2 fr qs fr l1l2l3 fu1 3 sb2 sb1 km km ka1 km2 km r2 r1 ka2 ka1 ka km3 ka3 r3 ka3 km1 km1 km2 km3 ka2 ka km km1 km2 km3 因速度再加快电流继续减小ka2欠电流 动断触头闭合km2线圈得电km2触头闭合串联r3继续启动 fu2 fr qs fr l1l2l3 fu1 3 sb2 sb1 km km ka1 km2 km r2 r1 ka2 ka1 ka km3 ka3 r3 ka3 km1 km1 km2 km3 ka2 ka km km1 km2 km3