Bumpless Automatic Transfer for a Switched-Doubly-Fed-Machine Propulsion Drive

Arijit Banerjee, Arthur H. Chang, Kawin North Surakitbovorn, Steven B. Leeb, James L. Kirtley

Research output: Contribution to journalArticlepeer-review


Variable-speed drives (VSDs) combined with doubly-fed machines (DFMs) offer interesting flexibility for power electronic drive design. These also provide opportunities for controlling interactions with an ac grid. Design options are most versatile for the VSD DFM when the machine stator can be operated from an ac or a dc source, selected as appropriate. This paper presents a silicon-controlled rectifier (SCR)-based transfer switch that can connect the stator of the DFM either to an ac source or a dc source 'on-the-fly.' Current commutations of the SCRs and a 'bumpless' transition in shaft behavior are both controlled from the rotor. Experimental results demonstrate wide-speed-range and four-quadrant operation of the drive achieved with a rotor converter rating that is one third of the DFM power rating.

Original languageEnglish (US)
Article number7046394
Pages (from-to)3147-3158
Number of pages12
JournalIEEE Transactions on Industry Applications
Issue number4
StatePublished - Jul 1 2015
Externally publishedYes


  • Doubly-fed machine
  • SCR
  • communication
  • control
  • power-electronic converter
  • static transfer switch

ASJC Scopus subject areas

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

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