Resilient rotor assembly for interior permanent magnet motor

Patent metadata

Field	Value
Publication number	US-9013074-B2
Application number	US-78672010-A
Country	US
Kind code	B2
Filing date	May 25, 2010
Priority date	May 25, 2010
Publication date	Apr 21, 2015
Grant date	Apr 21, 2015

Abstract

A method for manufacturing an interior magnet rotor core motor is described herein. The method includes attaching a resilient material to an inner rigid structure configured to engage a shaft associated with the motor, engaging the structure with the motor shaft, positioning the shaft and structure assembly with respect to the rotor core, and affixing the resilient material to the rotor core.

First claim

What is claimed is:

1. A motor comprising:
a stator;
a shaft;
an interior magnet rotor core comprising a central bore and a plurality of circumferentially spaced apertures;
at least one permanent magnet configured for insertion into one of said apertures;
an outer rigid structure inserted within said central bore, said outer rigid structure comprising a flange adjacent said rotor core, said flange comprising a first plurality of holes defined therethrough;
a resilient component inserted within said outer rigid structure; and
an inner rigid structure inserted within said resilient component, wherein said shaft is inserted through said inner rigid structure, wherein said outer rigid structure and said inner rigid structure are laminated structures.

2. A motor according to claim 1 wherein a portion of said rotor core is operable as said outer rigid structure and wherein said plurality of circumferentially spaced apertures is a plurality of circumferentially spaced slots.

3. A motor according to claim 1 wherein
said rotor core further comprises a second plurality of holes therethrough that are aligned with said first plurality of holes, said motor further comprising a plurality of pins extending through said first and second plurality of holes to couple said outer rigid structure to a face of said rotor core.

4. A motor according to claim 1 wherein said outer rigid structure is configured for a compression fit within said central bore.

5. A motor according to claim 1 wherein said resilient component comprises a first resilient component proximate a first end of said rotor core and a second resilient component proximate a second end of said rotor core.

6. A motor according to claim 1 , wherein said rotor core further comprises a plurality of passages extending through said rotor core between said outer rigid structure and each of said circumferentially spaced apertures.

7. A motor according to claim 1 , further comprising a plurality of passages extending through said rotor core between said circumferentially spaced apertures and an outer edge of said rotor core.

8. A motor according to claim 7 , further comprising at least one end ring coupled to an end of said rotor core, said end ring configured to cover said circumferentially spaced apertures and said plurality of passages.

9. A motor according to claim 8 , wherein said at least one end ring comprises a first end ring coupled to a first end of said rotor core and a second end ring coupled to a second end of said rotor core, wherein said rotor further comprises a plurality of members, each member extending through one of said passages to couple said first end ring and said second end ring.

10. A motor according to claim 1 , wherein said rotor core further comprises a laminated structure having a plurality of laminated sheets.

11. A motor according to claim 1 , wherein said resilient component comprises at least one of a thermoset material, a thermoplastic material, and an elastomeric material having a modulus between about 30 and about 70 MegaPascals.

12. A rotor assembly comprising:
a rotor core comprising a central rotor core bore therethrough and a plurality of circumferentially-spaced apertures;
a plurality of permanent magnets each configured for insertion into one of a plurality of apertures;
a resilient component attached to said rotor core within said central rotor core bore, said resilient component comprising a central resilient component bore therethrough; and
an inner rigid structure attached to said resilient component within said central resilient component bore, said inner rigid structure comprising a central inner rigid structure bore therethrough, said central inner rigid structure bore configured for fixed placement with respect to a shaft configured to extend therethrough; and
an outer rigid structure configured for a fixed placement with respect to said central rotor core bore, said rigid structure comprising a flange adjacent said rotor core, said flange comprising a first plurality of holes defined therethrough.

13. A rotor assembly according to claim 12 wherein said resilient component comprises at least one of a preformed resilient material attached to said inner rigid structure and a resilient material formed in place such that it is attached to said inner rigid structure.

14. A rotor assembly according to claim 12 , wherein said outer rigid structure comprises a central outer rigid structure bore therethrough, wherein said outer rigid structure comprises a laminated structure, said resilient component operable for fixed placement within said central outer rigid structure bore.

15. A rotor assembly according to claim 14 , wherein said rotor core further comprises a second plurality of holes aligned with said first plurality of holes, wherein said rotor assembly further comprises a plurality of pins extending through said first and second plurality of holes to couple said outer rigid structure to a face of said rotor core.

16. A rotor assembly according to claim 12 , wherein said rotor core further comprises a laminated structure having a plurality of laminated sheets.

17. A rotor assembly according to claim 12 , where said rotor core further comprises a plurality of passages extending through said rotor core between said outer rigid structure and each of said circumferentially spaced apertures.

18. A rotor assembly according to claim 12 , wherein said resilient component comprises at least one of a thermoset material, a thermoplastic material, and an elastomeric material having a modulus between about 30 and about 70 MegaPascals.

19. An external rotor motor comprising:
a stator;
a shaft;
a rotor comprising a rotor cup at least partially surrounding said stator;
at least one permanent magnet coupled to an inner surface of said rotor cup; and
a resilient ring assembly coupling said rotor cup to said shaft, wherein said resilient ring assembly is configured to provide a resilient mechanical connection between said shaft and said rotor, said resilient ring assembly comprises an inner rigid structure coupled to said shaft, said resilient ring assembly further comprising an outer rigid structure including a flange configured to couple said outer rigid structure to said rotor cup, wherein said inner rigid structure is a laminated structure.

20. A motor according to claim 19 , wherein said resilient ring assembly further comprises a resilient structure coupled between said outer rigid structure and said inner rigid structure.

Assignees

• Figgins Daniel S
• Kingrey Harold C
• Hall Jeffrey A
• Shelton Kerry B
• Brahmavar Subhash M
• Lytle Peter B
• Henry Michael W
• Regal Beloit America Inc

Inventors

• Figgins Daniel S
• Kingrey Harold C
• Hall Jeffrey A
• Shelton Kerry B
• Brahmavar Subhash M
• Lytle Peter B
• Henry Michael W

Classifications

• H02K1/30 Primary

  using intermediate parts, e.g. spiders · CPC title

• H02K15/03

  having permanent magnets · CPC title

• H02K1/276

  Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] · CPC title

• H02K5/24 Primary

  specially adapted for suppression or reduction of noise or vibrations · CPC title

• H02K1/2786

  Outer rotors · CPC title