Analysis, Design, and Implementation of Hysteresis Modulation Sliding-mode Controller for Negative-output Elementary Boost Converter

Abstract

This article presents the analysis, design, and output voltage regulation of a negative-output elementary boost converter operated in the continuous conduction mode using a hysteresis modulation sliding-mode controller for applications requiring the constant power source in medical equipment, telecom, industrial, and military/aerospace telemetry applications. The negative-output elementary boost converter is a new series of attractive DC-DC converters possessing high-voltage transfer gain, high power density, high efficiency, and reduced output voltage and inductor current ripples. Due to the time-varying and switching properties of the negative-output elementary boost converter, its dynamic characteristic becomes highly non-linear. In order to improve the dynamics performance and output voltage regulation of the negative-output elementary boost converter, a hysteresis modulation sliding-mode controller is developed. The hysteresis modulation sliding-mode controller is designed for the inherently variable structure of the negative-output elementary boost converter by using a state-space average based model. The three conditions of the hysteresis modulation sliding-mode controller for the negative-output elementary boost converter—the existence, hitting, and stability conditions—are analyzed. The performance of the developed controller is validated for its robustness to perform over a wide range of operating conditions through both the laboratory prototype and MATLAB/Simulink (The MathWorks, Natick, Massachusetts, USA) models, which are compared with a proportional-integral controller. Theoretical analysis, simulation, and experimental results are presented along with the complete design procedure.

Keywords:

• DC-DC power conversion
• negative-output elementary boost converter
• sliding-mode controller
• proportional-integral controller
• state-space average model