1现状目前,慢速吊钩桥式起重机的电动机采用绕线转子异步电动机或交流笼形异步电动机。慢速吊钩桥式起重机的工况大多为短时断续工作制,需要频繁起动和制动,有时还要求电动机有较大过载能力和较高机械强度,故大多采用交流笼形异步电动机。交流笼形异步电动机的调速采用变频调速、调压调速、变极调速等,其中变频调速 1 Status quo Currently, the slow hook overhead crane motor winding wound rotor asynchronous motor or AC induction motor. Slow crane overhead crane working conditions are mostly intermittent intermittent work system, requiring frequent starting and braking, and sometimes require a larger motor overload capacity and higher mechanical strength, so most of the AC cage AC induction motor. AC variable speed induction motor cage using frequency control, speed regulator, variable pole speed, etc., including frequency control