摘  要：传统高炉送料卷扬机利用电机转子串电阻的调速方法，调速平滑性差，调速范围有限，而且能耗高，效率低。而引入变频器改造后，可以实现过载保护，3段速控制，具有过流、过压、欠压、过载、短路和故障停车等多种保护功能，是一种良好的控制方案。 关键词：变频器；高炉卷扬机；调速 Abstract: The traditional blast furnace feeding winch uses the method that motor rotor series resistance to adjust speed, the smoothness of speed adjustment is poor, the speed range is limit, and the energy consumpt[登陆后可查看全文]