同步电动机外文文献翻译中英文1.docVIP

外文文献翻译 () 英文原文 Always magnetic belt synchro motor direct torque control system Introduction Synchronous motors are widely used in industrial production due to their high power factor, high operating efficiency, good stability, and constant speed. Familiar with the starting failure of the synchronous motor and troubleshooting in time has important significance for the motor itself and the production system. In order to troubleshoot faults and handle faults in a timely and accurate manner, detailed analysis of common faults in synchronous motors must be performed. 1 - Common Faults 1.1 The synchronous motor cannot start after being energized There are generally several reasons why a synchronous motor cannot run after it is started: (1) The power supply voltage is too low. Since the starting torque of the synchronous motor is proportional to the square of the voltage, if the voltage of the power supply is too low, the starting torque of the synchronous motor will drop drastically and be lower than the load torque, thus failing to start. Therefore, the power supply voltage must be increased to increase the motors power. Starting torque. (2) Failure of the motor itself Check the motor stator windings for short-circuit, open circuit, open-welding and poor connection. These faults will make the motor unable to establish the rated magnetic field strength, so that the motor can not start; check the motor Whether the bearing is damaged or not, if there is looseness of the end cap, if the bearing is damaged, the end cap loosens, the bearing sinks, and the stator core rubs, causing the motor to fail to start. If the rotor malfunctions, the low-pressure rocking table can be used to find the fault situation point by point. Take corresponding treatment methods; In the case of loose bearings and end caps, each time before driving, it is necessary to turn the car to see if the rotation of the motor rotor is flexible. If the bearing or the bearing bush is damaged, it must be replac