风机、水泵类负载电动机的高效节能运行方式

High Efficiency Energy Saving VVCF Method of Operation Motors of Load Fans or Water Pump

在风机、水泵类负载电动机的各种节能运行方式中,效率最好的是变频调速,但这种运行方式并没有使拖动风机水泵的异步电动机效率达到最高。本文提出一种不同于普通恒定压频比的恒频调压运行方式,即:保持频率不变,通过降低输入电压使异步电动机的效率达到最高,实现风机、水泵的高效节能运行。

VVVF is the most efficient way in all sorts of method of operation of energy saving applying in motors of load fans or water pump. However,this method of operation didn＇t make efficientcy of fan and water pump attain to top level.Thls article refer to a kind of method of variable voltage constant frequency which differ from other normal ways.That is to say. under constant frequency, through reducing the input voltage it makes the efficiency of induction motor reach top level to realize the method of operation of the high efficiency and energy saving in fins and water pump.