一、我国提升机电控系统的现状目前我国提升机90%以上采用交流异步电动机的拖动方式,其电控系统有单绳交流和多绳交流两种。它们都采用改变转差率S的调速方法,在调速过程中均产生大量的转差功率,大量电能白白地消耗在转子电路,并使转子发热,调速的经济性较差。采用可控硅串级调速(即转子电路 First, our country to enhance the status of electromechanical control system At present, more than 90% of the elevator hoist AC asynchronous motor using the drag mode, the electronic control system has a single rope exchange and multi-rope exchange two. They are used to change the slip S speed control method, in the process of speed are a lot of slip power, a lot of power consumption in the white rotor circuit, and make the rotor heat, speed economic less. Using silicon cascade speed control (ie rotor circuit