In a closed-loop speed control system, the set point speed value is the:

• A. The desired speed selected for the motor
• B. The actual speed
• C. The motor torque
• D. The drive voltage

Answer: (A)

The set point is the target speed you specify for the motor. It serves as the reference value that the controller uses to compare against the motor’s actual speed, which is fed back into the system. By measuring the difference between this target and the real speed, the controller generates an appropriate drive signal to adjust torque or voltage so the motor speed matches the desired value. In short, the set point is the desired speed, not the speed you’re currently measuring, nor the resulting torque or drive voltage.