AC drives are adjustable speed drives, used in electro-mechanical drive systems to control AC electric motor speed and torque. These variable frequency drive (VFD) systems are used in many small appliances and in large compressors as well. A VFD drive is really a type of controller that powers a motor by varying the voltage and frequency to the motor itself. A single phase VFD is widely used in fans, pumps, power tools, and much more. We also carry NEMA rated enclosure drives, which are endorsed by the National Electrical Manufactuers Association, and open enclosure drives. Zoro also carries adjustable frequency drive accessories and conduit entry kits.