Rotor Structure of Rotating Electric Machine

• US 20070290565A1
• Filed: 01/10/2006
• Published: 12/20/2007
• Est. Priority Date: 01/12/2005
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Mizutani, Tatsuhiko, Sugiyama, Toshiya
• Granted Patent: US 7,772,734 B2
• Time in Patent Office: Days
• US Class Current: 310/156.55
• CPC Class Codes: H02K 1/276 Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]

Abstract

A rotor includes a rotor core and disk-shaped end plates provided to sandwich the rotor core in the direction of a rotation shaft. The end plates are each formed to have one end face relatively closer to the rotor core and larger in outer diameter with the center at the rotation shaft than the other end face.

Claims

1. A rotor structure of a rotating electric machine having a rotor and a stator, said rotor comprising a rotor core and disk-shaped end plates provided to sandwich said rotor core in the direction of a rotation shaft, wherein

said end plates are each formed to have a first end face closer to said rotor core and larger in outer diameter than a second end face.

2. The rotor structure of a rotating electric machine according to claim 1, wherein

said rotor further comprises a permanent magnet inserted into each of openings formed to be arranged in the circumferential direction of said rotor core, and

said end plates are each formed to have said first end face with its outer diameter larger with respect to a circumferentially outermost position of said openings.

3. The rotor structure of a rotating electric machine according to claim 2, wherein

said end plates are each formed to have said second end face with its outer diameter larger with respect to the circumferentially outermost position of said openings.

4. The rotor structure of a rotating electric machine according to claim 1, wherein

a coil is wound around a core of said stator, and

said end plates are formed to have at least a predetermined distance from a coil end of said coil.

5. The rotor structure of a rotating electric machine according to claim 1, wherein

a portion between said first end face and said second end face is formed to have an outer diameter that gradually changes.

6. The rotor structure of a rotating electric machine according to claim 1, wherein

a connecting portion between each of said first and second end faces and an outer peripheral surface of a portion between said first and second end faces is formed to have a curved surface.

7. The rotor structure of a rotating electric machine according to claim 1, wherein

said rotor core is formed by stacking a plurality of electromagnetic steel plates.

8. The rotor structure of a rotating electric machine according to claim 1, wherein

an insulating member is attached to an outer rim of said end plates.

9. The rotor structure of a rotating electric machine according to claim 1, wherein

a coil is wound around a core of said stator, and

an insulating member is attached at a position of said coil that is opposite to said end plates.