Rotor for a rotary electric machine having a barrier protecting coil ends of the rotor

Patent metadata

Field	Value
Publication number	US-12388306-B2
Application number	US-202218145523-A
Country	US
Kind code	B2
Filing date	Dec 22, 2022
Priority date	Dec 23, 2021
Publication date	Aug 12, 2025
Grant date	Aug 12, 2025

Abstract

A rotor for a rotary electric machine, capable of rotating around an axis of rotation, the rotor has first and second axial ends and includes a rotor body having a plurality of teeth circumferentially distributed around the axis and projecting radially, each tooth being in contact with two end plates. Also included is a rotor winding having a plurality of coils, each coil being wound on one of said teeth of the rotor body, each coil having two coil ends, two covers, a first cover located on the first axial end of the rotor and a second cover located on the second axial end of the rotor. The rotor has at least one non-conductive radial barrier that maintains a predetermined distance between the first coil end and the first cover on the one hand and between the second coil end and the second cover on the other hand.

First claim

The invention claimed is:

1. Rotor for a rotary electric machine, capable of rotating around an axis of rotation, the rotor having two axial ends, a first axial end and a second axial end, the rotor comprising:
a rotor body comprising a plurality of teeth circumferentially distributed around the axis and projecting radially, each tooth being in contact with two end plates, a first end plate and a second end plate, the first end plate being located on the first axial end of the rotor and the second end plate being located on the second axial end of the rotor,
a rotor winding comprising a plurality of coils, each coil being wound on one of said teeth of the rotor body, each coil having two coil ends, a first coil end located on the first axial end of the rotor and a second coil end located on the second axial end of the rotor, and
two covers, a first cover located on the first axial end of the rotor and a second cover located on the second axial end of the rotor, said first cover and said second cover protect said first rotor axial end and said second rotor axial end,
wherein the rotor has at least one non-conductive radial barrier that maintains a predetermined distance between the first coil end and the first cover on the one hand and between the second coil end and the second cover on the other hand,
wherein the two end plates are topped with a plurality of caps, each cap covering at least radially and partially one of the first coil end and second coil end,
wherein the rotor further comprising two interposition parts, a first interposition part arranged on the rotor first axial end and a second interposition part arranged on the rotor second axial end, each interposition part is fixed on the corresponding cover, the radial barrier comprising said two interposition parts, and
wherein each interposition part comprising an axial portion that partially covers the caps.

2. Rotor according to claim 1 , the rotor having an interior space filled with potting material.

3. Rotor according to claim 2 , the rotor comprising inter-teeth spaces in which the coils are arranged, each inter-teeth space comprises also a lock ledge that cooperates with complementary shapes formed in the two adjacent teeth.

4. Assembly comprising a rotor according to claim 2 and a rotor shaft on which the rotor is mounted on.

5. Rotor according to claim 1 , the rotor comprising inter-teeth spaces in which the coils are arranged, each inter-teeth space comprises also a lock ledge that cooperates with complementary shapes formed in the two adjacent teeth.

6. Assembly comprising a rotor according to claim 5 and a rotor shaft on which the rotor is mounted on.

7. Rotor according to claim 1 , wherein the axial portion has windows facing the caps.

8. Rotor according to claim 1 , each interposition portion having a transverse portion, the transverse portion having openings facing the coil ends.

9. Rotor according to claim 8 , each cover having reinforcing arms and each interposition part having projections that come circumferentially between the coil ends.

10. Assembly comprising a rotor according to claim 1 and a rotor shaft on which the rotor is mounted on.

11. Rotary electrical machine comprising an assembly according to claim 10 and a stator surrounding the assembly.

Assignees

• Valeo Eautomotive Germany Gmbh

Inventors

• Finger-Albert Christian
• Siepker Carsten

Classifications

• H02K1/28

  Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures · CPC title

• B60K1/00

  Arrangement or mounting of electrical propulsion units (B60K7/00 takes precedence; arrangement or mounting of plural diverse prime-movers for mutual or common propulsion B60K6/00) · CPC title

• Y02T10/64

  Electric machine technologies in electromobility · CPC title

• Y02T10/62

  Hybrid vehicles · CPC title

• B60Y2200/90

  Vehicles comprising electric prime movers · CPC title