A Variable Frequency Drive (VFD) is an electronic device used to control the speed and torque of an electric motor by varying the frequency and voltage supplied to the motor. VFDs are also known as adjustable frequency drives, variable speed drives, or inverters. They are widely used in industrial and commercial applications to optimize energy consumption, improve motor control, and enhance overall system performance. Available in many brands like Delta, Schneider, Siemens, Mitsubishi, Fuji, INVT etc.