A dual-input Boost-Buck converter with coupled inductors for TEG applications

Author

Feng Cao ; Junjun Zhang ; Hongfei Wu ; Haibing Hu ; Yan Xing ; Xudong Ma

Author_Institution

Jiangsu Key Lab. of New Energy Generation & Power Conversion, Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China

fYear

2013

fDate

15-19 Sept. 2013

Firstpage

2020

Lastpage

2025

Abstract

A dual-input Boost-Buck converter with coupled inductors (DIBBCI) is proposed for thermoelectric generator (TEG) power system, where low current ripple under wide input voltage range is required for the converter. The DIBBCI is constructed by cascading two Boost cells with a Buck cell, and the filter inductors of the Buck cell is composed of two inductors, which are inverse-coupled with two filter inductors of Boost cells. Reduced size and power loss of the filter inductors are achieved benefiting from the DC magnetic flux cancellation. A control strategy for free and seamless modes transfer among constant-voltage, constant-current and distributed maximum power point tracking (MPPT) are also proposed. The operational principles, the influence of the coupled inductors and design considerations are analyzed in detail. A 450W prototype is built with experimental results given to verify the analysis.

Keywords

control system synthesis; maximum power point trackers; power inductors; power system control; thermoelectric conversion; DIBBCI; MPPT; TEG applications; boost cells; buck cell; constant-current; constant-voltage; control strategy; coupled inductors; dc magnetic flux cancellation; design considerations; distributed maximum power tracking; dual-input boost-buck converter with coupled inductors; filter inductors; low current ripple; operational principles; power 450 W; power loss reduction; seamless modes transfer; size reduction; thermoelectric generator power system; wide input voltage range; Batteries; Couplings; Inductors; Magnetic cores; Maximum power point trackers; Switches; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy Conversion Congress and Exposition (ECCE), 2013 IEEE

Conference_Location

Denver, CO

Type

conf

DOI

10.1109/ECCE.2013.6646955

Filename

6646955