Control Strategy of Buck Converter Driven Dc Motor: a Comparative Assessment

This paper presents the detailed account on the control design for input tracking of a buck converter driven dc motor. Proportional-Integral (PI), Proportional-Integral-type Fuzzy Logic controller (PI-type FLC) and Linear Quadratic Regulator (LQR) are the techniques proposed in this investigation to control the speed of a dc motor. The dynamic system composed from buck-converter/dc motor is considered in this investigation and derived in the state-space and transfer function forms. Complete analyses of simulation results for PI, PI-type FLC and LQR techniques are presented in frequency domain and time domain. Performances of the controllers are examined in terms of input tracking capability, duty cycle input energy and armature current. Finally, a comparative assessment of the impact of each controller on the system performance is presented and discussed.