异步电动机恒功率变频调速的研究

The Research for Variable Frequency Speed Regulation with Constant Power of Asynchronous Motor

现代电力电子技术的发展为交流异步电动机的变频调速提供了现实可能性.在变频调速的应用中,人们发现,为了得到恒功率宽范围的变频调速,变频器的容量往往要比电动机额定功率大得多,显然这是很大的浪费.本文研究恒功率宽范围变频调速时异步电动机参数、调速范围和变频器容量的关系,得山电动机漏抗越小,所选变频器容量可以越小的结论,故对恒功率宽范围变频调速中的异步电动机设计时,电动机的漏抗值有重要意义.

The development of the contemporarypower electronics techniques paves the way to the realisa-tion of the speed regulation for the A. C. induction motorwith variable frequency. In the application of variable-frequency speed regulation with constant - power andwide-range.it was found that the capacity of the invert-er is much greater than the rated capacity of the motor.Evidently its'not appropriate. In this paper, the relation-ships of the I. M. parameters, range of speed regulationand the capacity of inverter were studied for constant-power and wide-range variable frequency speed regula-tion. It was found that smaller is the leakage reactance ofI. M., smaller is the capacity of the inverter. This ismeaningful to designing the appropriate leakage reactancefor the motor to be operated at variable frequency speedregulation with constant-power and wide-range.