Journal of Chaohu University ›› 2021, Vol. 23 ›› Issue (6): 106-113.doi: 10.12152/j.issn.1672-2868.2021.06.015

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A High-gain DC/DC Converter with Expandable Structure

SUN Chun-hu, LING Jing, LIU Ting-ting: School of Electronic Engineering, Chaohu University   

  1. School of Electronic Engineering, Chaohu University, Chaohu Anhui 238024
  • Received:2021-09-29 Online:2021-11-25 Published:2022-03-07

Abstract: Based on switched inductors and switched capacitors, a novel high-gain DC/DC converter with expandable structure is proposed. The article firstly analyzes the current research status of high-gain DC/DC converters; secondly, it analyzes the series topology based on switched inductors and switched capacitors; and then it analyzes the proposed novel high-gain converter based on switched inductors and switched capacitors. After the analysis, the working principle and main waveforms of the converter are studied; the voltage gain of the novel high-gain converter and the voltage stress of the switch tube and diode are studied; the state-space equation is modeled for the novel high-gain converter, the PI regulator is designed, and finally the Simulink closed-loop control system simulation of the proposed system is carried out. The simulation results show that the closed-loop system has excellent dynamic and steady-state performance, and achieves an output of 20 times the voltage gain. The novel DC/DC converter has the advantages of expandable structure and high gain.

Key words: switched inductor, switched capacitor, scalable structure, voltage gain, state space equation

CLC Number: 

  • TM46