Controller Design Loop Shaping Technique for Multi-Phase Interleaved DC-DC Step-Up Converter

Abstract

Control designers have implemented many controllers and techniques to enhance the Multi-phase Interleaved Boost Converter (MIBC). Designing a controller for MIBC is a challenging task due to its inherent non-minimum phase behavior. The present paper presents a graphical loop shaping technique for developing the compensator for non-minimum phase (NMP) MIBC. The merit of the suggested method is the reduction of complex calculations for designing a controller. The main objective of the controller design technique is to alleviate the NMP behavior with minimum effort. Time, frequency domain analysis has been performed to comment on the dynamic performance and stability of MIBC. The stability, robustness, and sensitivity of MIBC for different values of gain of the controller are analyzed. The effect of variation of controller gain on system performance has also been studied and discussed. The regulated output voltage has been obtained for variable input voltage with the help of the controller designed. Open-loop and closed-loop simulation results have been presented to validate the proposed controller's usability and efficacy with the converter.