Electric machine having an outer rotor

• US 20020171305A1
• Filed: 04/15/2002
• Published: 11/21/2002
• Est. Priority Date: 04/17/2001
• Status: Abandoned Application

• Current Assignee: Moteurs Leroy Somer (Emerson Electric Company)
• Original Assignee: Moteurs Leroy Somer (Emerson Electric Company)
• Inventors: Gauthier, Pascal, Abou Akar, Atef, Saint-Michel, Jacques, Coupart, Eric, Gilles, Christophe
• Application Number:
  US10/121,577
• Publication Number:
  US 20020171305A1
• Time in Patent Office: Days
• US Class Current: 310/156.08
• CPC Class Codes: B60K 2007/0038 the motor moving together with the wheel axle
• CPC Class Codes: B60K 2007/0092 the motor axle being coaxial to the wheel axle
• CPC Class Codes: B60K 7/0007 the motor being electric
• CPC Class Codes: H02K 1/2791 Surface mounted magnets; Inset magnets
• CPC Class Codes: H02K 15/022 with salient poles or claw-shaped poles
• CPC Class Codes: H02K 15/095 by laying conductors around salient poles
• CPC Class Codes: H02K 16/04 Machines with one rotor and two stators
• CPC Class Codes: H02K 21/22 with magnets rotating around the armatures, e.g. flywheel magnetos
• CPC Class Codes: H02K 2203/06 Machines characterised by the wiring leads, i.e. conducting wires for connecting the winding terminations
• CPC Class Codes: H02K 7/1016 Machine of the outer rotor type
• CPC Class Codes: H02K 7/14 Structural association with mechanical loads, e.g. with hand-held machine tools or fans with fan or impeller for cooling the machine H02K9/06

Abstract

The present invention relates a rotary electric machine having

an inner stator having a plurality of teeth each serving as a core of an individual coil, and

an outer rotor comprising:

a non-magnetic casing,

a plurality of permanent magnets disposed inside the non-magnetic casing between pole pieces not having holes for engaging fixing bars

Claims

1. / A rotary electric machine having

an inner stator having a plurality of teeth each serving as a core of an individual coil, and

an outer rotor comprising:

a non-magnetic casing,

a plurality of permanent magnets disposed inside the non-magnetic casing between pole pieces not having holes for engaging fixing bars.

2. / A machine according to claim 1, wherein, in a section plane that is perpendicular to an axis of said rotor, each magnet presents two non-parallel faces converging towards said stator.

3. / A machine according to claim 1, said machine not having any gearing.

4. / A machine according to claim 1, wherein said pole pieces are laminated.

5. / A machine according to claim 1, wherein said rotor comprises an inner surface which is circularly cylindrical.

6. / A machine according to claim 1, said machine constituting a motor.

7. / A machine according to claim 1, said machine constituting a generator.

8. / A machine according to claim 1, wherein said nonmagnetic casing is configured to serve as a wheel rim for a pneumatic tire.

9. / A machine according to claim 1, wherein said nonmagnetic casing includes annular grooves.