Energy Efficient Air Compressor Variable Speed Drive Air Compressors Use an intelligent drive system to continually vary the motor speed to meet air demand. The drive controls the speed (RPM) of the unit based on demand, fluctuating to perfectly match the amount of power output required. When demand slows, the compressed air system reduces the motor speed, which reduces power consumption. Features : Low speed; 1000rpm has just 1/3 rpm to compare with normal compressors; Frequency controller with PM motor to saving more energy; Low maintaining cost Automatic flow rate control Compact compressing unit Control panel Energy consumption Air quality Straight connection Durable Fan power Reliability Low Noise level