Circuit to ensure equal current sharing and switching losses bet

Details Circuit to ensure equal current sharing and switching losses bet Circuit to ensure equal current sharing and switching losses bet

1999-01-07

2000-07-04

Berhane, Adolf Deneke

Electric power conversion systems

Current conversion

Having plural converters for single conversion

323272, G05F 140, H02M 700

Patent

active

060847905

ABSTRACT:
A current sharing circuit has a plurality of power devices, such as diode rectifiers, connected in a parallel arrangement. Each leg of the parallel arrangement comprises one power device connected in series to an inductive element. The series resistance of the inductive element in each leg of the parallel circuit moderates the affect of temperature variations on the current drawn by each power device, which enables substantially equal current sharing to occur. As used in switch mode power supplies, such as forward converters and boost converters, the current sharing circuit provides the benefit of substantially equal current sharing between power devices without increasing resistive losses which would reduce the efficiency of the power supply.

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"Static and Dynamic Behavior of Paralleled IGBTs," Romeo Letor, Advanced Application Engineer, Discrete & Standard ICs Group, SGS-Thomson Microelectronics. 1990 IEEE.
"Snubber Circuit and Mosfet Paralleling Considerations for High Power Boost-Based Power-Factor Correctors," A. Pietkiewicz and D. Tollik, Ascom Energy Systems, Ltd. 1995 IEEE.

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