对于球磨机、破碎机等重载或频繁启动的生产机械,为了防止过高的启动电流对电网造成冲击,同时还要保征能够获得大的启动转矩,通常选用绕线式异步电动机采用降压启动方式(串电阻、频敏变阻器等),达到限制启动电流,增大启动转矩的目的,但是绕线式异步电动机串电阻降压启动传统的启动装置是一个由滑环、碳刷、变阻器、交流接触器、继电器等10多个易损件组成的完整二次回路,存在很多缺 For ball mill, crusher and other heavy load or frequent start of production machinery, in order to prevent the high starting current impact on the grid, but also to ensure the levy can get a large starting torque, usually using wound induction motor step-down Start-up mode (string resistance, frequency-sensitive rheostat, etc.), to limit the starting current, increase the starting torque, but the winding asynchronous motor series resistance buck start conventional starting device is a slip ring, brush, rheostat , Exchanges and contacts, relays, etc. More than 10 consumables complete secondary circuit, there are many missing