What is the primary function of a motor controller?

The primary function of a motor controller is to start and stop a motor. This encompasses the essential operations required for the motor to function properly within various systems. While a motor controller does play a role in regulating speed, enhancing energy efficiency, and monitoring performance, its fundamental purpose is to provide the means to initiate and cease the operation of the motor. Starting and stopping a motor are critical for the control of electromechanical processes, as they determine when the motor is active or not, thus playing a key role in the overall operation and safety of the electrical system.