Answer: Air compressors are increasingly widely used in industry, mining, medical industry and even agriculture. The amount of use in industry is particularly considerable. In the industrial field, the power consumption of air compressors ranks first. Most air compressors are driven by electric motors. After being filtered by the filter, the air enters the compressor to be compressed. The compressed air is separated from the oil and gas and output. As long as the air compressor is in working condition and the motor is running at the rated speed, the output air flow of the air compressor is adjusted by the size of the intake valve opening. Even when unloading, it runs at the rated speed, which generates power consumption. Therefore, it is absolutely necessary to take a variety of measures to adjust the output of the compressor so that the motor always works at the appropriate load to save energy.