The variable-frequency drive article provides additional information on electronic speed controls used with various types of AC motors.
The majority of modern factories are heavily involved in cutting costs, and energy awareness should be a key concern.
Large electrical cost savings can be achieved by installing a variable speed drive compressor in place of an existing rotary screw or piston machine.
Because of this, many governments, including the US and UK, are pushing the industries to move towards this technology in hopes of reducing wasted energy.
Where demand remains constant within 5–15% of the total free air delivery flow rate, dual-control compressors configured in a split solution can provide higher efficiency than a VSD.