Design and Implementation of an Analog Controller Based on K-factor Design Method for a Novel Isolated Z-Source DC-DC Converter with High Voltage Gain

Abstract

In this study, an analog control circuit design and implementation are performed by using the K-factor design method for a novel isolated Z-source dc-dc converter with high voltage gain. The closed loop system created by the control circuit ensures a constant output voltage at the converter output although there is a step change in input voltage and load within certain limits. The K-factor design method used to design the control circuit allows obtaining the design of the feedback circuit with a certain flow of mathematical equations. The mathematical method used to calculate the control circuit elements increases the reliability of the closed loop system. In this study, firstly, theoretical study of a closed loop control of a novel Z-source dc-dc converter topology is completed with K-factor design method. Secondly, the theoretical study results are analyzed by implementing a simulation study in PLECS. Lastly, by conducting an experimental study, simulation results and experimental results are compared. As a result, the verification of the experimental study that results in 1% error margin of the simulation study has formed the basis of a reliable control method for a new generation dc-dc converter.