Title :
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
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;
Journal_Title :
Industry Applications, IEEE Transactions on
