RCD snubber revisited

Author

Finney, Stephen J. ; Williams, Barry W. ; Green, Tim C.

Author_Institution

Dept. of Comput. & Electr. Eng., Heriot-Watt Univ., Edinburgh, UK

Volume

32

Issue

1

fYear

1996

Firstpage

155

Lastpage

160

Abstract

The use of the polarized RCD turn-off snubber configuration across switching devices is popular because of its simplicity and use of only passive components. This configuration is limited by the fact that all capacitor-stored energy is dissipated in the discharge resistor. In this paper, it is shown that with the addition of a ferrite transformer to the standard RCD arrangement, in excess of 70% of the energy stored on the snubber capacitor may be passively recovered into the DC supply. Performance of this passive recovery snubber is supported by theoretical, simulated and practical results

Keywords

capacitor storage; ferrite devices; power capacitors; power semiconductor switches; power system protection; power transformers; residual current devices; snubbers; switching circuits; DC supply; discharge resistor; ferrite transformer; passive components; passive recovery; performance studies; polarized RCD turn-off snubber; power semiconductor switch protection; snubber capacitor; stored energy dissipation; switching devices; Capacitors; Differential equations; Ferrites; Industry Applications Society; Polarization; Resistors; Snubbers; Switches; Switching circuits; Voltage control;

fLanguage

English

Journal_Title

Industry Applications, IEEE Transactions on

Publisher

ieee

ISSN

0093-9994

Type

jour

DOI

10.1109/28.485827

Filename

485827