Motor with sealed controller housing

Patent metadata

Field	Value
Publication number	US-9577489-B2
Application number	US-201414267756-A
Country	US
Kind code	B2
Filing date	May 1, 2014
Priority date	May 1, 2014
Publication date	Feb 21, 2017
Grant date	Feb 21, 2017

Abstract

An electric motor is provided. The motor is mountable to a machine. The motor includes a rotor rotatable about an axis, a stator, a housing, and a fastener. The housing includes a first endshield and a controller can, with the stator being positioned axially between the endshield and the can. The fastener extends through and interconnects the first endshield, the stator, and the can. The fastener projects axially beyond at least one of the first endshield and the can for connection to the machine.

First claim

What is claimed is:

1. An electric motor mountable to a machine, said motor comprising:
a rotor rotatable about an axis;
a stator;
a housing including a first endshield and a controller can, with the stator being positioned axially between the first endshield and the can;
a fastener extending through and interconnecting the first endshield, the stator, and the can,
wherein said fastener projects axially beyond at least one of the first endshield and the can for connection to the machine; and
a shell at least partly circumscribing the stator and positioned between the first endshield and the can,
wherein said housing further includes a seal assembly positioned between the shell and the can,
wherein said seal assembly seals the can,
wherein said seal assembly includes a second endshield and a gasket,
wherein said second endshield includes a plurality of arcuately spaced apart nubs,
wherein said gasket includes a plurality of arcuately spaced apart nub-receiving openings corresponding to and receiving the nubs.

2. The motor of claim 1 ,
wherein said seal assembly includes a fastener-receiving opening,
wherein said fastener extends through the fastener-receiving opening such that the seal assembly is interconnected to the first endshield, the stator, and the can.

3. The motor of claim 1 ,
wherein said shell has a shell diameter,
wherein said can has a can diameter,
wherein said shell diameter and said can diameter are equal.

4. An electric motor mountable to a machine, said motor comprising:
a rotor rotatable about an axis;
a stator;
a housing including a first endshield and a controller can, with the stator being positioned axially between the first endshield and the can;
a fastener extending through and interconnecting the first endshield, the stator, and the can,
wherein said fastener projects axially beyond at least one of the first endshield and the can for connection to the machine; and
a shell at least partly circumscribing the stator and positioned between the first endshield and the can,
wherein said housing further includes a seal assembly positioned between the shell and the can,
wherein said seal assembly seals the can,
wherein said seal assembly includes a second endshield and a gasket,
wherein said second endshield and said can include complemental alignment components.

5. The motor of claim 4 ,
wherein said seal assembly includes a fastener-receiving opening,
wherein said fastener extends through the fastener-receiving opening such that the seal assembly is interconnected to the first endshield, the stator, and the can.

6. The motor of claim 4 ,
wherein said shell has a shell diameter,
wherein said can has a can diameter,
wherein said shell diameter and said can diameter are equal.

7. An electric motor mountable to a machine, said motor comprising:
a rotor rotatable about an axis;
a stator;
a housing including a first endshield and a controller can, with the stator being positioned axially between the first endshield and the can;
a fastener extending through and interconnecting the first endshield, the stator, and the can,
wherein said fastener projects axially beyond at least one of the first endshield and the can for connection to the machine; and
a shell at least partly circumscribing the stator and positioned between the first endshield and the can,
wherein said housing further includes a seal assembly positioned between the shell and the can,
wherein said seal assembly seals the can,
wherein said seal assembly includes a second endshield and a gasket,
wherein said seal assembly further includes a grommet defining a wire-receiving opening therethrough,
wherein said motor further includes electrical wiring extending through the wire-receiving opening,
wherein said grommet is subject to compression, such that fluid leakage through the wire-receiving opening is avoided.

8. The motor of claim 7 ,
wherein said second endshield includes a circumferentially extending recess,
wherein said shell is at least in part received in the recess.

9. The motor of claim 7 ,
wherein said second endshield defines a grommet-receiving opening therethrough,
wherein said grommet is received in the grommet-receiving opening,
wherein said grommet-receiving opening is undersized relative to the grommet, such that the grommet is compressed.

10. The motor of claim 7 ,
wherein said seal assembly includes a fastener-receiving opening,
wherein said fastener extends through the fastener-receiving opening such that the seal assembly is interconnected to the first endshield, the stator, and the can.

11. The motor of claim 7 ,
wherein said stator presents a first generally radially extending stator margin,
wherein said first endshield extends along the first stator margin,
wherein said shell and said first endshield cooperatively at least in part enclose the stator.

12. The motor of claim 7 ,
wherein said shell has a shell diameter,
wherein said can has a can diameter,
wherein said shell diameter and said can diameter are equal.

13. The motor of claim 7 ,
wherein said motor comprises a plurality of said fasteners.

14. The motor of claim 13 ,
wherein said fasteners are at least substantially evenly arcuately spaced apart.

15. The motor of claim 7 , further comprising:
a controller at least in part enclosed within the can.

16. The motor of claim 15 ,
wherein said controller presents a generally radially extending controller margin,
wherein said can includes—
a generally radially extending end plate extending along the controller margin, and
a generally axially extending skirt projecting from the end plate toward the shell and at least partly circumscribing the controller.

17. The motor of claim 7 ,
wherein said rotor includes a shaft,
wherein said shaft projects axially beyond at least one of the first endshield and the can.

18. The motor of claim 7 ,
wherein said second endshield includes a plurality of arcuately spaced apart nubs,
wherein said gasket includes a plurality of arcuately spaced apart nub-receiving openings corresponding to and receiving the nubs.

19. The motor of claim 18 ,
wherein said second endshield and said can include complemental alignment components.

20. The motor of claim 19 , further comprising:
a controller at least in part enclosed within the can,
wherein said controller presents a generally radially extending controller margin,
wherein said can includes—
a generally radially extending end plate extending along the controller margin, and
a generally axially extending skirt projecting from the end plate toward the shell and at least partly circumscribing the controller,
wherein said can further includes a plurality of fins extending generally axially from the end plate,
wherein said fins are configured to disperse heat from the controller.

21. The motor of claim 18 , further comprising:
a controller at least in part enclosed within the can,
wherein said controller presents a generally radially extending controller margin,
wherein said can includes—
a generally radially extending end plate extending along the controller margin, and
a generally axially extending skirt projecting from the end plate toward the shell and at least partly circumscribing the controller,
wherein said can further includes a plurality of fins extending generally axially from the end plate,
wherein said fins are configured to disperse heat from the controller.

Assignees

• Nidec Motor Corp

Inventors

• Collins Michael T
• Shahi Prakash B
• Sherman Jeffrey S
• Vehige Joseph A

Classifications

• H02K5/18

  with ribs or fins for improving heat transfer · CPC title

• H02K1/185

  to outer stators · CPC title

• H02K5/161

  radially supporting the rotary shaft at both ends of the rotor (H02K5/165, H02K5/167, H02K5/173 take precedence) · CPC title

• H02K5/225 Primary

  Terminal boxes or connection arrangements (specially adapted for submersible motors H02K5/132) · CPC title

• H02K5/10

  with arrangements for protection from ingress, e.g. water or fingers · CPC title