Analysis of energy saving in variable frequency speed regulation of hoist

The method of calculating the energy saving in variable frequency speed regulation of hoist and the application effect were analyzed with an example,then the conclusion that the electric control with variable frequency speed regulation could save 20% energy contrasting against the electric control with series-wound rheostat,which meets the development tendency of industry modernization and the energy saving requirements,thus energy can be saved greatly and production cost reduced also.The variable frequency speed regulating system can obtain obvious economic benefits and is worth popularizing.