Pole-changing flux-weakening DC-excited dual-memory machines for electric vehicles

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

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Original languageEnglish
Article number7286788
Pages (from-to)27-36
Journal / PublicationIEEE Transactions on Energy Conversion
Issue number1
Publication statusPublished - 1 Mar 2016
Externally publishedYes


The dc-excited dual-memory machine utilizes two different kinds of permanent magnet (PM) materials for each PM pole. By employing a set of separately controlled magnetizing windings, it can easily realize the pole-changing function without affecting or changing the armature winding topology. In this paper, the principle of pole changing of the dc-excited dual-memory machine is analyzed by finite-element method. With the aim of preventing unexpected demagnetization of the low-coercivity PMs, a special scheme, namely the pole-protection scheme, is developed to shield these PMs. Experimental results are given to verify the pole-changing principle of the dc-excited dual-memory machine, and the feasibility of pole-dropping and pole-retrieving operations.

Research Area(s)

  • Dual-memory machine, electric vehicle, flux-mnemonic machine, flux-weakening, memory machine, permanent magnet machine, pole-changing