Many types of air compressors can be divided into positive displacement compressors and speed compressors according to their working principles. They are widely used in rock drills, pneumatic picks, pneumatic wrenches, pneumatic sandblasting, pneumatic valve control, food and pharmaceutical processing, metal smelting, and tires. Inflatable, bottle blowing machines and other occasions where air is used as power or raw material. Using a frequency converter to control an air compressor can make the air compressor start with low impulse current, high air pressure stability, and lower noise. It can realize constant pressure air supply control and achieve the effect of energy-saving operation. Frequency conversion control is the development trend of the entire industry.