A new soft-switching technique for buck, boost, and buck-boost converters

Author

Zhang, Yingqi ; Sen, Paresh C.

Author_Institution

Dept. of Electr. & Comput. Eng., Queen´´s Univ., Canada

Volume

39

Issue

6

fYear

2003

Firstpage

1775

Lastpage

1782

Abstract

A new soft-switching technique for buck, boost, and buck-boost converters using coupled inductors is proposed in this paper. The principles of operation of these converters are analyzed in detail. An additional winding is added on the same core of the main inductor for the purpose of commutation. By using hysteresis current control, zero-voltage switching conditions are ensured over a wide load range. The main inductor current is kept in continuous conduction mode with small ripple, which allows high output power and small filter parameters. Also, the switching frequency can be kept constant when the load changes. Prototypes of buck, boost, and buck-boost converters have been built to verify the proposed concept. The experimental results are presented and they verify the analysis.

Keywords

DC-DC power convertors; PWM power convertors; commutation; electric current control; inductors; switching convertors; 100 kHz; 24 V; 48 V; 90 W; PWM converters; boost converters; buck converters; buck-boost converters; commutation; continuous conduction mode; hysteresis current control; inductor; inductor current; small filter parameters; small ripple; soft-switching technique; switching frequency; winding; zero-voltage switching; Current control; Hysteresis; Inductors; Pulse width modulation converters; Resonance; Switches; Switching converters; Switching frequency; Switching loss; Zero voltage switching;

fLanguage

English

Journal_Title

Industry Applications, IEEE Transactions on

Publisher

ieee

ISSN

0093-9994

Type

jour

DOI

10.1109/TIA.2003.818964

Filename

1248263