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Three-phase motor

  • US 7,064,470 B2
  • Filed: 05/19/2004
  • Issued: 06/20/2006
  • Est. Priority Date: 05/20/2003
  • Status: Expired due to Fees
First Claim
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1. A three-phase motor having a stator formed by sequentially inserting winding coils of three phases of U-phase, V-phase and W-phase into slots provided on an inner circumferential surface of a stator core,wherein the winding coil of each phase is formed by connecting plural unipolar coils formed by winding electric wires in plural turns, and each of the unipolar coils includes a pair of insertion parts to be inserted into the slots and a pair of coil end parts connecting the pair of insertion parts, andthe winding coils of the three phases have the relationships of Cv/Cu <

  • 1.0 and Cw/Cv <

    1.0, where Cu represents an average length of the electric wires forming the coil end parts of each of the unipolar coils in the winding coil of U-phase, Cv represents an average length of the electric wires forming the coil end parts of each of the unipolar coils in the winding coil of V-phase, and Cw represents an average length of the electric wires forming the coil end parts of each of the unipolar coils in the winding coil of W-phase.

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