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Reluctance machine with auxiliary field excitations

  • US 5,780,949 A
  • Filed: 10/13/1997
  • Issued: 07/14/1998
  • Est. Priority Date: 01/29/1996
  • Status: Expired due to Fees
First Claim
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1. A reluctance machine system comprising:

  • (a) a reluctance machine including;

    a stator defining a plurality of stator poles;

    a rotor defining a plurality of rotor poles, the rotor being mounted for rotation with respect to the stator, the stator poles and the rotor poles being configured such that the total area of overlap between the rotor and stator poles is constant as the rotor rotates with respect to the stator;

    at least N, separately energizable phase windings, where N is an integer greater than 2, each phase winding including a plurality of winding coils, where each winding coil surrounds a stator pole;

    a full pitch auxiliary field winding, the auxiliary field winding comprising one or more full pitched coils, where each full pitched coil encircles a group of N stator poles, and wherein the group includes, for each of the N phase windings, a stator pole surrounded by a winding coil from that phase winding; and

    (b) a power converter coupled to the reluctance machine, the power converter including;

    a DC bus;

    power switching devices coupling the phase windings to the DC bus for providing phase energization currents to the phase windings; and

    circuitry for providing continuous energization current to the auxiliary field winding, wherein the magnetic flux produced by the auxiliary field winding is relatively constant.

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