PWM-Based Adaptive Speed Controller of a DC Motor Driven by a DC-DC Boost Converter

Many studies have recently appeared in the control literature regarding the regulation of the angular speed of DC motors driven by DC-DC converters. In this work, the DC-DC boost converter is used to drive a DC motor with only one sensor required to measure its angular speed. An observer is developed to accurately estimate the inductor current and the output voltage of the converter, the armature current of the motor and to generate a simple adaptation law for the estimate of the load torque. A linear sliding surface is used to derive an adaptive controller that is simple in its design and yet exhibits excellent features in terms of its angular speed regulation and robustness to parameter uncertainties of the boost converter and the DC motor. The robustness and effectiveness of the controller is validated by computer simulations.