Rotor for a rotating electric machine

• US 9,735,642 B2
• Filed: 01/23/2013
• Issued: 08/15/2017
• Est. Priority Date: 01/26/2012
• Status: Active Grant

• Current Assignee: Vitesco Technologies GmbH (INA-Holding Schaeffler GmbH & Co. KG)
• Original Assignee: Continental Automotive GmbH (Continental AG)
• Inventors: Bulatow, Michael, Welke, Knut
• Primary Examiner(s): Lam, Thanh
• Application Number:
  US14/373,577
• Publication Number:
  US 20150028711A1
• Time in Patent Office: 1,665 Days
• Field of Search: 310194, 310214-215
• CPC Class Codes: H02K 1/24 Rotor cores with salient poles ; Variable reluctance rotors
• CPC Class Codes: H02K 1/265 Shape, form or location of the slots
• CPC Class Codes: H02K 3/487 Slot-closing devices
• CPC Class Codes: H02K 3/527 applicable to rotors only

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.

Claims

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.