×

Permanent magnet dynamoelectric rotating machine and electric vehicle equipped with the same

  • US 6,133,662 A
  • Filed: 09/15/1997
  • Issued: 10/17/2000
  • Est. Priority Date: 09/13/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. A permanent magnet electric machine comprising:

  • a stator provided with windings thereon; and

    a rotor disposed with an air gap between the stator and the rotor, and having a plurality of permanent magnets embedded along a circumference thereof, with spacing between adjacent magnets;

    whereina circumferential extent of surfaces of the permanent magnets facing the stator is selected so that an induced voltage in the machine has a waveform which approximates a sinusoidal waveform; and

    an angle θ

    whose sides are radii of the rotor passing through opposite circumferential ends of a surface of each permanent magnet facing the stator satisfies one of the expressions;

    
    
    space="preserve" listing-type="equation">θ





    τ

    .sub.s +α

    ,
    
    
    space="preserve" listing-type="equation">θ





    τ

    .sub.s +β

    ;

    
    
    space="preserve" listing-type="equation">θ





    τ

    .sub.s +γ

    where n is a natural number, τ

    s is a slot pitch of slots in the stator, α

    is an angle formed by a tooth, of the stator, β

    is an angle formed by a slot of the stator, and γ

    is an angle formed by an opening of each slot.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×