Rotor for a rotating electric machine

Patent metadata

Field	Value
Publication number	US-9735642-B2
Application number	US-201314373577-A
Country	US
Kind code	B2
Filing date	Jan 23, 2013
Priority date	Jan 26, 2012
Publication date	Aug 15, 2017
Grant date	Aug 15, 2017

Abstract

A rotor for a rotating electric machine includes a plurality of pole teeth supporting an excitation winding, grooves respectively formed between the pole teeth, and wedges provided in the grooves, each wedge having a concave shape with a bulge oriented towards the inside of the rotor.

First claim

What is claimed is:

1. A rotor for a rotating electric machine, the rotor comprising:
a plurality of pole teeth, each supporting an exciter winding;
a groove formed between each pair of adjacent pole teeth; and
a groove wedge arranged in each groove, wherein each groove wedge has a concave shape defining a bulge having an arc shape with a constant curvature radius directed toward an interior of the rotor.

2. The rotor of claim 1 , wherein each groove wedge is securely clamped in the respective groove between the respective pair of adjacent pole teeth by an engagement of longitudinal sides of the groove wedge with the pair of pole teeth.

3. The rotor of claim 2 , wherein each groove wedge has a seal on each longitudinal side engaged with a respective pole tooth.

4. The rotor of claim 1 , comprising a sealing plug arranged between at least one lateral end of each groove wedge and an adjoining structure of the rotor.

5. The rotor of claim 4 , wherein each sealing plug has flexible lamellas.

6. The rotor of claim 1 , wherein each exciter winding is surrounded by a casting compound or an impregnating compound.

7. An electric motor, comprising:
a rotor comprising:
a plurality of pole teeth, each supporting an exciter winding;
a groove formed between each pair of adjacent pole teeth; and
a groove wedge arranged in each groove, wherein each groove wedge has a concave shape defining a bulge having an arc shape with a constant curvature radius directed toward an interior of the rotor.

8. The electric motor of claim 7 , wherein each groove wedge of the rotor is securely clamped in the respective groove between the respective pair of adjacent pole teeth by an engagement of longitudinal sides of the groove wedge with the pair of pole teeth.

9. The electric motor of claim 8 , wherein each groove wedge of the rotor has a seal on each longitudinal side engaged with a respective pole tooth.

10. The electric motor of claim 7 , wherein the rotor comprises a sealing plug arranged between at least one lateral end of each groove wedge and an adjoining structure of the rotor.

11. The electric motor of claim 10 , wherein each sealing plug has flexible lamellas.

12. The electric motor of claim 7 , wherein each exciter winding of the rotor is surrounded by a casting compound or an impregnating compound.

13. A motor vehicle, comprising:
an electric motor, comprising:
a rotor comprising:
a plurality of pole teeth, each supporting an exciter winding;
a groove formed between each pair of adjacent pole teeth; and
a groove wedge arranged in each groove, wherein each groove wedge has a concave shape defining a bulge having an arc shape with a constant curvature radius directed toward an interior of the rotor.

Assignees

• Continental Automotive Gmbh

Inventors

• Bulatow Michael
• Welke Knut

Classifications

• H02K1/265

  Shape, form or location of the slots · CPC title

• H02K1/24

  Rotor cores with salient poles {; Variable reluctance rotors} · CPC title

• H02K3/487

  Slot-closing devices · CPC title

• H02K3/527 Primary

  applicable to rotors only · CPC title