Performance Evaluation of Effective Multi-Structure Controllers for KY Negative Output Boost Converter

Abstract

This paper focuses on the design of multi-structure controllers (MSCs) for KY negative output boost converter (KYNOBC) functioned in continuous current mode (CCM) for low-power source applications. KYNOBC is one of the topologies of DC–DC converter that performs the positive DC input supply voltage into a negative output voltage. Dynamic behavior of KYNOBC is nonlinear in nature because of its time-changing operation. The single loop control does not regulate the multi-parameters of KYNOBC during the line and load variations owing to that it produces poor transient and dynamic analyses. With the aim of controlling the multi-parameters of KYNOBC such as inductor current and output voltage, enriching the transient and dynamic analysis, the MSCs are recommended in this paper. In our study, MSCs for KYNOBC consist of two loops such as inner proportional (P) controller inductor current loop for modulating the converter current and outer fuzzy logic controller (FLC)/proportional integral (PI) controller voltage loop for regulating the output voltage. The P and PI values are determined from the mathematical modeling of KYNOBC and the fuzzy rules are framed based on its performance without modeling equations. The behaviors of the KYNOBC with MSCs are validated at various zones by making the MATLAB/Simulink simulations and prototype model. The controller parameters are realized in prototype field programmable gate array (FPGA). The responses are recorded to indicate the dexterous of the MSCs for it.