A high-frequency two-switch forward converter with optimized performance

Author

Salazar, Lautaro D. ; Ziogas, Phoivos D.

Author_Institution

Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, Que., Canada

Volume

37

Issue

6

fYear

1990

fDate

12/1/1990 12:00:00 AM

Firstpage

496

Lastpage

505

Abstract

The analysis and design of a high-frequency two-switch forward converter topology with transformer flux balancing and extended duty cycle capability are presented. To improve converter performance, an auxiliary circuit connected in parallel with each power switch is proposed. This auxiliary circuit uses a low-power switch or a nonlinear resistor connected in series with a capacitor. As a result, the DC component of the magnetizing current is minimized, and the converter provides the means of recovering the energy associated with the parasitic inductances of the circuit components. Thus, higher than usual efficiency and higher operating frequencies are obtained. Experimental results are presented for a 4 kW, 40 kHz prototype unit

Keywords

power convertors; 4 kW; 40 kHz; HF 2-switch forward convertor; extended duty cycle capability; magnetizing current; optimized performance; transformer flux balancing; Circuit topology; Frequency; Magnetic circuits; Magnetic flux; Prototypes; Resistors; Switched capacitor circuits; Switches; Switching circuits; Switching converters;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/41.103454

Filename

103454