What is the definition of a VFD Controls? VFD Controls or Variable Frequency Drive Controls are electronic devices that control an AC motor. They are used to control a variety of functions within a motor, such as accelerating and decelerating, as well as changing the direction of the motor. VFDs also offer more efficient control of the motor, as they are able to reduce energy consumption by controlling the speed of the motor. This type of control is often found in industries such as HVAC, automation, and robotics. VFDs are comprised of several components, including a control board, electrical power supply, and I/O (input/output) devices. The control board is responsible for monitoring the system and sending signals to the I/O devices, which then control the motor. The electrical power supply provides the necessary power for the operation of the VFD, while the I/O devices act as a communication interface between the control board and the motor. With these components