The use of inverter is in the occasion of air volume fluctuation and the PID can fast control. Compared with button control power frequency operation up and down limits, the stability for pressure output is raised by exponential order and kept at a constant point.

The inverter can real-time adjust the speed and control the air output to balance the air supply according to PID control and real air use. When the consumption is low, the compressor can be auto sleep which can reduce the loss of energy. The optimized control remove can further improve energy saving.