Optimised power stages for high frequency 380/440 VAC medium power switch mode supplies

Author

Patni, C.K. ; Perier, L.

Author_Institution

SGS-Thomson Microelectron., Paris, France

fYear

1988

fDate

13-15 Jul 1988

Firstpage

41

Lastpage

46

Abstract

The authors present the elements necessary to make the optimum choice of power semiconductors (for the transistors and secondary diodes) and the power stage configurations for medium power SMPS (between 1 to 15 kVA). The power stage realized comprises of an asymmetrical bridge forward converter. An optimised power switch combining bipolar and MOSFET technologies is developed. It is capable of switching in excess of 50 A at 25 kHz on the 380/440 VAC rectified three phase mains. Secondary diode choice depends largely on the transformer ratio and the desired output DC voltage. Conduction losses at 25 kHz govern the choice of secondary diodes

Keywords

power convertors; power supplies to apparatus; 1 to 15 kVA; 25 kHz; 380 V; 440 V; 50 A; DC voltage; MOSFET; asymmetrical bridge forward converter; bipolar transistors; conduction losses; high frequency; medium power switch mode supplies; power semiconductors; power stage configurations; rectified three phase mains; secondary diodes; switching; transformer ratio; transistors;

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

23309