VFD (Variable Frequency Drive)
An electronic device that controls motor speed by varying the frequency and voltage of power supplied to the motor.
Full Definition
A Variable Frequency Drive (VFD), also called an adjustable speed drive or variable speed drive, is an electronic device that controls the speed of AC motors by varying the frequency and voltage of the electrical power supplied to the motor. VFDs enable energy savings by matching motor speed to load requirements, reducing energy consumption compared to constant-speed operation. VFDs are commonly used on pumps, fans, and compressors in HVAC systems.
Related Terms
Pump
A mechanical device that moves fluids (water, refrigerant, etc.) through building systems.
Fan
A mechanical device that moves air through HVAC systems and building spaces.
Motor
An electric machine that converts electrical energy into mechanical energy to drive equipment.
Building Automation System (BAS)
A centralized control system that monitors and controls building mechanical, electrical, and plumbing systems.
Energy Recovery
Technology that recovers waste energy from building systems to improve efficiency and reduce energy consumption.