STARTING THE LARGE SYNCHRONOUS MOTOR BY SPEED METHOD

Abstract

Compared with asynchronous machines with the same capacity, synchronous machines have many advantages, However, it has a complicated structure, especially with the excitation circuit at Rotor side, so controlling it at startup and work will be difficult. During start-up, it is very important to determine the time when the DC current is applied to the rotor side so that the Stator's magnetic field "getting" the Rotor's magnetic field. This article introduces the model and simulates the process of starting the large synchronous motor according to the speed method. The synchronous "getting" time is determined when the motor speed reaches approximately the synchronous speed. The simulation results were verified on Matlab - Simulink software.