Overlapped end caps for stator core

Patent metadata

Field	Value
Publication number	US-11735972-B2
Application number	US-202218148611-A
Country	US
Kind code	B2
Filing date	Dec 30, 2022
Priority date	Dec 16, 2019
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

A set of interchangeably pairable end caps is provided for electrically insulating a variety of stator cores having differing axial stack heights. Each pair of end caps cooperatively defines a generally radially projecting, generally axially extending wire barrier including axially opposed ends. Each of the ends forms a respective rounded winding ramp configured to smoothly guide wiring into a wire trough in part defined by the wire barrier.

First claim

What is claimed is:

1. A stator comprising:
a generally toroidal core presenting axially opposed first and second core faces;
a first end cap fitted to the core;
a second end cap fitted to the core; and
wiring wound about the core,
said end caps extending toward each other and between the upper and lower core faces to at least in part encompass the core,
said end caps being at least in part disposed between the wiring and the core,
said end caps cooperatively defining an axially extending trough receiving at least a portion of said wiring,
said end caps cooperatively defining a generally radially projecting, generally axially extending wire barrier defining a generally circumferential margin of the trough,
said wire barrier including axially opposed ends, wherein the first end cap defines a first one of the ends and the second end cap defines a second one of the ends,
each of said ends forming a respective rounded winding ramp configured to smoothly guide wiring into the trough during wiring of the core.

2. The stator as claimed in claim 1 ,
said wire barrier extending at least substantially continuously axially between the ends.

3. The stator as claimed in claim 1 ,
said first end cap including a first wire barrier portion defining a notch,
said second end cap including a second wire barrier portion defining a projection,
said projection being received in said notch.

4. The stator as claimed in claim 1 ,
said core including a yoke and a tooth extending generally radially from the yoke,
said tooth including a generally radially extending arm,
said arm including a pair of generally tangentially spaced apart, generally axially extending arm side faces,
each of said end caps including an arm side portion extending along one of said arm side faces,
said arm side portions being spaced generally tangentially from said wire barrier to define a second generally circumferential margin of the trough.

5. The stator as claimed in claim 4 ,
each of said end caps including a yoke portion extending generally tangentially along the yoke,
said wire barrier projecting generally radially from said yoke portion.

6. The stator as claimed in claim 5 ,
a part of each of said yoke portions extending between and interconnecting the wire barrier and respective ones of the arm side portions,
each said part of each of said yoke portions at least in part defining a generally radial margin of the trough.

7. The stator as claimed in claim 1 ,
each of said end caps including a yoke portion extending generally tangentially along the yoke,
said wire barrier projecting generally radially from said yoke portion.

8. The stator as claimed in claim 1 ,
said first end cap including a first interengaging structure,
said second end cap including a second interengaging structure,
said first and second interengaging structures engaging one another at a juncture, such that said first and second end caps cooperatively continuously encompass at least part of the core.

9. The stator as claimed in claim 1 ,
said end caps cooperatively defining an axially extending second trough receiving at least another portion of said wiring,
said end caps cooperatively defining a generally radially projecting, generally axially extending second wire barrier defining a generally circumferential margin of the second wiring trough,
said second wire barrier including axially opposed second ends, wherein the first end cap defines a first one of the second ends and the second end cap defines a second one of the second ends,
each of said second ends forming a respective rounded second winding ramp configured to smoothly guide wiring into the second trough during wiring of the core.

Assignees

• Nidec Motor Corp

Inventors

• Bailey Daniel E
• Modi Chetan O
• Michaels Paul G
• Flores Jahir
• Bastien Ryan M

Classifications

• H02K3/48 Primary

  in slots · CPC title

• H02K1/165

  Shape, form or location of the slots · CPC title

• H02K3/12

  arranged in slots · CPC title

• H02K3/345

  between conductor and core, e.g. slot insulation · CPC title

• H02K3/487

  Slot-closing devices · CPC title