Feedback Control for Buck Converter - DC Motor Using Observer

Abstract

Some DC converters are an important part of DC system because these are the main control in DC voltage regulator. The desired performance of this DC converter is following the reference voltage and having a fast response. This paper designs controller using the principle of feedback control to operate a buck converter. The using of a buck converter to control the system has the aim to set the DC bus voltage and then control DC motor speed. The dynamic model of the system is given in the form of a state space, this form is used for investigation of the system. In order to design controller, several system parameters are needed. Giving an observer is promised to reduce the number of sensors used on the system. In the simulation, the PID controller is used to compare with the proposed controller. The performance produced by the proposed controller have a simple design and good response. The performance of the controller is inspected in two terms, angular velocity and armature current. The output response is forced to reach the desired angular velocity value.