What is the definition of a VFD system? VFD stands for Variable Frequency Drive and is an electrical device used to control the speed of an AC induction motor by varying the frequency of the power supply. A VFD system is typically composed of a drive, a motor, and a control system. The drive is the component that controls the frequency of the power supply, the motor is the component that is controlled by the drive, and the control system is the component that takes input from a user and sends it to the drive.
When a user inputs a desired speed for the motor, the control system passes this information to the drive. The drive then adjusts the frequency of the power supply to correspond to the desired speed. This allows the motor to operate at a constant speed, regardless of its load. This also allows for more efficient operation, since the motor is not running at full speed when there is no load.
The main benefit of a VFD system is its ability