A VFD, short for variable recurrence drive, is a sort of an engine control electrical gadget for beginning and controlling an air conditioner inductive engine and its speed with differing recurrence (Hz) and voltage. A VFD Control Framework comprise on an air conditioner control board lodging the VFD and any related engine control or circuit security gadgets in a nook, safeguarding them from electrical shocks, fires, dampness, consumption, dust, and different circumstances. The most well-known NEMA evaluations for VFD control board nooks are NEMA 12, NEMA 3R, and NEMA 4x. A VFD control board regularly houses a choice of control board parts including a VFD, symphonious channels, line reactors, flood defenders, a detour, circuit breakers, engine starters, delicate starters and a cooling unit of some sort or another, as VFD's will generally deliver a ton of intensity. VFD control boards are accessible in a wide assortment of force evaluations, and are utilized across enormous scope modern applications like siphoning, penetrating and to control other hard core gear, for example, lifts, rock pulverizing machines, and water and sewer treatment plants and water preservation for rural frameworks.

In the USA generally half of the absolute electrical energy produced is consumed by AC Inductive engine hardware. Variable recurrence drive innovation offers a practical strategy to match engine speed to stack requests and addresses a cutting edge an open door to lessen working expenses and work on generally efficiency.