The frequency converter integrates high-voltage high-power transistor technology and electronic control technology, and is widely used. The function of a frequency converter is to change the frequency and amplitude of the AC motor power supply, thereby changing the period of its moving magnetic field and achieving smooth control of the motor speed.
The emergence of frequency converters has simplified complex speed control, replacing most of the work that could only be completed by DC motors with a combination of frequency converters and AC squirrel cage induction motors, reducing size, lowering maintenance rates, and advancing transmission technology to a new stage.