When changeAsynchronous motorThe stator voltage can be obtained at different speeds. Because the torque of the motor is proportional to the square of the voltage, the maximum torque drops a lot, and the speed regulation range is small, making the general cage motor difficult to apply.

       A cage motor with a large rotor resistance value can be used, such as a torque motor specially for voltage regulation and speed regulation, or a frequency sensitive resistor in series on a winding motor. In order to expand the stable operating range, when the speed is in2:1The above occasions should use feedback control to achieve the purpose of automatic adjustment of speed.

       The main device of voltage regulation is a power supply that can provide voltage change. At present, the commonly used voltage regulation methods include series saturation reactor, autotransformer and thyristor voltage regulation. The thyristor voltage regulation mode is the best.

       Characteristics of voltage regulation speed regulation:

①The voltage regulation circuit is simple and easy to realize automatic control;

②During the voltage regulation process, the transfer differential power is consumed in the rotor resistance in the form of heat, and the efficiency is low.

       Voltage regulation speed regulation is generally applicable100KWThe following production machinery.

       The above content is composed ofThree-phase asynchronous motor manufacturers,Mori machineProvided. Available if needed1688Search "Shengzhou Chaoli Electric Appliance Factory", or contact us directly0575-8378-1127.