Function And Selection Of Ac Reactor In Transmission Device

In the motor drive system, whether it is AC drive or DC drive, a rectifier is required for AC-DC conversion, which inevitably produces harmonic pollution. High-order harmonics not only harm the stability of the power grid and the operating efficiency of the power system, but also harm the normal operation of the motor.

The main impact of harmonics on the motor is to cause additional iron loss and copper loss, causing the equipment temperature to rise too high and reducing the insulation strength; increasing the current of the motor, reducing the efficiency of the motor, and also increasing the reactive power of the motor, reducing the power of the motor. The factor drops significantly; secondly, vibration and noise are generated. Long-term vibration will cause metal fatigue and mechanical damage; it will also cause harmonic overvoltage; the preferred method to limit harmonic current is to install AC Reactors on the AC side. Currently, in industrial/factory automatic control systems, AC reactors are installed between frequency converters, speed regulators and grid power supplies to suppress surge voltages and currents generated by frequency converters, speed regulators, etc., and to compensate for reactive power. and harmonious governance.