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

fYear

1989

fDate

6-10 Nov 1989

Firstpage

60

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 recovery 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; extended duty cycle capability; high frequency two-switch forward converter; nonlinear resistor; optimized performance; parasitic inductances; transformer flux balancing; Circuit topology; Frequency conversion; Hafnium; Magnetic flux; Pulse width modulation converters; Pulse width modulation inverters; Resonant inverters; Switches; Switching converters; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics Society, 1989. IECON '89., 15th Annual Conference of IEEE

Conference_Location

Philadelphia, PA

Type

conf

DOI

10.1109/IECON.1989.69612

Filename

69612