synchronous motors for sale
Synchronous motor for motor operation. Since the synchronous motor can operate under the leading power factor by adjusting the excitation current, it is conducive to improving the power factor of the power grid. Therefore, large-scale equipment such as large blowers, pumps, ball Mills, compressors, and steel mills are commonly used. Synchronous motor drive.
This advantage is particularly prominent when a large low-speed device uses a synchronous motor. In addition, the speed of the synchronous motor is completely determined by the power supply frequency. When the frequency is certain, the speed of the motor is also certain. It does not change with the load. This feature is of great significance in some transmission systems, especially in multi-machine synchronous transmission systems and precision speed control systems. The running stability of synchronous Motors is also relatively high. Synchronous motors are generally operated under excessive excitation, and their overload capacity is greater than that of corresponding asynchronous Motors. The torque of the asynchronous motor is proportional to the square of the voltage, and the torque of the synchronous motor is determined by the product of the voltage and the internal electromotive force generated by the excitation current of the motor, that is, only the Fangcheng ratio of the voltage. When the voltage of the grid suddenly drops to about 80 % of the rating, the torque of the asynchronous motor often drops to about 64 %, and the operation is stopped due to immobilized load; The torque of the synchronous motor does not drop much, and it can also be used to ensure the stable operation of the motor through strong excitation.
