In general, a DC drive converts an Alternating Current (AC

How do motor drives work?

A motor drive controls the speed, torque, direction, and resulting horsepower of a motor. Dc drives typically control a shunt-wound dc motor, which has separate armature and field circuits. Ac drives control ac-induction motors and, like their dc counterparts, control speed, torque, and horsepower.

Why VFD is used in motors?

VFD stands for Variable Frequency Drive. They are used for controlling the speed of an AC motor. They are also used for ramping up a motor for a smooth startup, or to prevent a heavy load from straining the motor on startup. … VFDs allow the operator to control the flow of the pump manually or automatically with a PLC.