Analysis and design of energy recovery snubbers for switched reluctance motor drives

V. S. Gharpure, R. Krishnan, S. Lee

Research output: Contribution to journalConference articlepeer-review

3 Scopus citations


Snubber studies for Switched Reluctance Motor (hereafter referred to as SRM) drives are nonexistent even though the converter topologies are unique and do not fall under the category of inverter topologies applicable to ac motor drives. The importance of the snubbers does not come into picture until either the power rating of the converter is high and in the multi-kW range or the switching frequency requirement is in the 20 kHz range. Such requirements are coming to the fore recently in many product development applications such as extruders, general purpose drives, integral starter generators for aircraft, electric vehicles, high speed spindles and centrifuges, etc. This paper is concerned with extending the Undeland snubber configuration to the two-switches per phase converter topology of the SRM drive including the energy recovery feature. The energy recovery snubbers are then analyzed in terms of the various modes of operation encountered in the converter. A design procedure for the energy recovery snubbers is developed. The design procedure and the operation of the proposed snubber configuration in the SRM drive are experimentally verified with a laboratory prototype SRM drive. The impact of the proposed snubber on the converter efficiency and its comparison with conventional snubber based system such as with R-C-Ds is evaluated to assess the advantages of the proposed energy recovery snubber.

Original languageEnglish (US)
Pages (from-to)1055-1062
Number of pages8
JournalConference Record - IAS Annual Meeting (IEEE Industry Applications Society)
StatePublished - Dec 1 1994
EventProceedings of the 29th IAS Annual Meeting. Part 3 (of 3) - Denver, CO, USA
Duration: Oct 2 1994Oct 5 1994

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering


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