60HP VSD Variable Speed Drive Industrial Screw Air Compressor - China Variable Speed Controller, Variable Speed Controller Compressor | Made-in-China.com
Variable Speed Drive Compressors
30 HP Variable Speed Drive Rotary Screw Air Compressor with Sound Enclosure, 125 CFM @ 125 PSI, 460-Volt, 3-Phase | E30+VFD - Rotary Screw - Official Store for Air Compressors Vip
Variable frequency drive on refrigeration compressor
Hyundai 20hp 500L Permanent Magnet Screw Air Compressor with Dryer and Variable Speed Drive | HYSC200500DVSD