Abstract: This paper describes the study and application of DC-DC converters for controlling the speed of a DC motor. It highlights open-loop speed control of a separately excited DC motor by using a Cuk converter. This has been achieved by employing the Cuk converter for controlling the motor speed by varying the armature voltage, which is the output voltage of the Cuk converter based on the PWM (Pulse Width Modulation) technique. The speed control of DC motor is being done for both its: a) rated and b) below rated speeds, and a simulation analyzed in MATLAB using a Simulink model for open loop speed control. The performance metrics were also studied through a hardware setup for implementing control on DC motor.

Keywords: Cuk converter, separately excited DC motor, speed control, PWM (Pulse Width Modulation).

| DOI: 10.17148/IJIREEICE.2021.9417