Design and Control of Buck Converter using PI control and Reference Regulator Technique

Abstract

In paper proposes about DC-to-DC buck converter design and control of output voltage by using a PI control technique and reference regulator technique. DC-DC converter is a power electronics circuit, which converts one voltage value to another. Buck converters are step-down converters, where output voltage is lower than input voltage. Buck converter topology is used in this paper with the controlled output voltage by the PI control and reference regulator technique. Voltage in this type of converters controlled through switching by storing energy in circuit and releasing it afterwards to output at given voltage level. In this paper input voltage is 100V, output voltage is obtained is 50V by the simulation model results. Considered: R = 100 ohm (90 ohm for testing under higher load) R2 = 900 ohm connectable resistance L = 10-6H C = 5x10-6 F PI controller: P = 2 , I = 310, Frequency of switching is 200 kHz values This conversion method is more efficient than voltage division, where unwanted power dissipated as heat. First two parts of this paper introduces design analysis of the circuit in Simulink. Third part includes stress test experiments in order to verify specifications.