Title :
The RCD snubber revisited
Author :
Finney, S.J. ; Williams, B.W. ; Green, T.C.
Author_Institution :
Dept. of Comput. & Electr. Eng., Heriot-Watt Univ., Riccarton, Edinburgh, UK
Abstract :
The use of the polarized RCD (resistor-capacitor-diode) 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 the present work, 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. Theoretical, simulated, and practical results substantiate the viability of this simple but effective turn-off snubber
Keywords :
overvoltage protection; power electronics; switching circuits; capacitor-stored energy; discharge resistor; ferrite transformer; passive components; polarised RCD turn-off snubber; resistor-capacitor-diode; switching devices; Capacitors; Equations; Equivalent circuits; Ferrites; Partial discharges; Polarization; Resistors; Snubbers; Switches; Voltage control;
Conference_Titel :
Industry Applications Society Annual Meeting, 1993., Conference Record of the 1993 IEEE
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-1462-X
DOI :
10.1109/IAS.1993.299089
