A high frequency resonant flyback switching power supply

Author

Zaza, J.M. ; Ferrieux, J.P. ; Perard, J.

Author_Institution

Lab. d´´Electrotech. de Grenoble, France

fYear

1988

fDate

13-15 Jul 1988

Firstpage

120

Lastpage

124

Abstract

The advantages of high frequency operation of a switched-mode power supply are no longer disputed. This allows a significant reduction in supply weight and volume. However, high frequency operation has some disadvantages to the operation and efficiency of the system. The influence of parasitic elements (leakage inductance) becomes large, and switching and transformer losses (ferromagnetic losses, skin effect, eddy currents) increase. A significant solution to these problems is to use resonance to create conditions of natural commutation. Resonant switches (which combine thyristors or dual thyristors with a resonant circuit) allow spontaneous commutation and zero switching losses. The authors present a resonant-thyristor-diode for use in flyback convertor applications

Keywords

power convertors; power supplies to apparatus; thyristor applications; commutation; dual thyristors; eddy currents; efficiency; ferromagnetic losses; high frequency operation; leakage inductance; parasitic elements; power convertors; power supplies to apparatus; resonant circuit; resonant flyback switching power supply; resonant switches; resonant-thyristor-diode; skin effect; switched-mode power supply; switching losses; thyristors; transformer losses;

fLanguage

English

Publisher

iet

Conference_Titel

Power Electronics and Variable-Speed Drives, Third International Conference on

Conference_Location

London

Print_ISBN

0-85296-364-5

Type

conf

Filename

23329