change pole motor meaning in English

变极电动机(极对数可变)

Change pole motor
变极电动机极对数可变
During the designing course of the change pole motor , it takes the most time to research winding array
变极电机的设计中，花费时间最多的是研究绕组的排列。
Simplex winding double speed asynchronous motor is easiest and widest polechanging control method among the change pole motors
摘要单绕组双速异步电动机是变极电机中方法最简易、应用最广泛的一种变极调速方法。