controlling exitation of a synchronous motor under starting and resynchronizing regimes

摘要

A method and device for controlling exitation of a asynchronous motor under starting and resynchronizing regimes are proposed which make it possible to improve the resulting stability of heavily loaded motors by means of increasing theelectromagnetic torque in regimes of alternating switching an exitation winding to an exitor or to editional resistance. Results of investigating the behaviour of the motor under regimes considered with the use a mathematical model and results ofmodelling the operation of the device proposed are given. It is shown that the torque can be raised by 20-30% at the angular speed equal to 0,95 p. u.