感应式异步电动机降压起动分析

START OF INDUCTIVE ASYNCHRONOUS ELECTRIC MOTOR AT LOW VOLTAGE

针对感应式异步电动机定子回路串联电感或串联电阻降压起动,对机端电压进行定性分析,得出以下结论:串联相同电抗值的电阻或电感时,采用电阻起动比采用电感起动的母线电压低,机端电压高;分别串联电阻、电感使母线电压相同时,串联电阻机端电压比串联电感机端电压高。

The motor-end voltage when the inductive asynchronous electric motor is started at the reduced voltage by series inductance＇or series resistance is qualitatively analyzed. It is concluded that when the resistance or inductance of the same reactance are installed in series, the bus voltage of start-up by using resistance is lower than that of using inductance, but the motor-end voltage is higher. When series resistance and series inductance are installed separately to have a same bus voltage, the motor-end voltage of series resistance is higher than that of series inductance.