【摘要】 目前应用于风机水泵调速的各种方法中效率最高的是变频调速 ,但它还没有使拖动风机水泵的异步电动机效率达到最高。为实现异步电动机的高效运行 ,提出了一种不同于普通压频比恒定的变频变压方法 ,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更多还原

【Abstract】 The most efficient way is frequency conversion timing in all sorts of timings applying in fan or water pump, but there is something to do in that field. A variable voltage variable frequency way which different from normal way is brought forward in this paper in order to realize the efficient work about induction motor, namely, reducs the input voltage make the efficiency of induction motor reach tiptop under the condition keeping frequency constant.更多还原