Researching On The Impact Of Three-Phaseasynchronous Motor Caused By Instantaneous Power Outage

Nowadays, AC motor has been applied in various fields of social production, especially the squirrel-cage asynchronous motor become a major driving force of industrial production equipment with a simple structure to create, inexpensive, sturdy and durable, moment of inertia is small and wide usage of the environment etc.This article in-depth analysis and research the effect by instant dumping and the transient process of reclosing to three-phase squirrel-cage asynchronous motor which working order in the power. The simulation and experiments research of which was supported with theoretical analysis and calculation.For the three-phase squirrel-cage asynchronous motor is a high-order, non-linear, strong coupling of multi-variable system, the changing rule of the stator voltages, stator currents, rotor currents, rotor speed and electromagnetic torque was analyzed systematically by space-vector based model of three-phase squirrel-cage asynchronous motor in this article, and then, their correctness was verified by simulations and experiments.In additional,the article describes the best effect of reclosing after power off in a short time to three-phase squirrel-cage asynchronous motor, and then, the improper instant of reclosing is determined based on mature formula used in the simulation system model.Finally, this paper made simulation by a simplified model with the actual application of three-phase squirrel cage induction motors,and takes the conclusions compare with ones obtioned above which will be explained in the end.