Rotor for a rotating electric machine and rotating electric machine

• US 9,634,526 B2
• Filed: 01/23/2013
• Issued: 04/25/2017
• Est. Priority Date: 01/26/2012
• Status: Active Grant

• Current Assignee: Vitesco Technologies GmbH (Continental AG)
• Original Assignee: Continental Automotive GmbH (Continental AG)
• Inventors: Bulatow, Michael, Welke, Knut
• Primary Examiner(s): Lam, Thanh
• Application Number:
  US14/373,605
• Publication Number:
  US 20150035394A1
• Time in Patent Office: 1,553 Days
• Field of Search: 310 43- 45, 310 66
• CPC Class Codes: C22C 38/02 containing silicon
• CPC Class Codes: C22C 38/04 containing manganese
• CPC Class Codes: C22C 38/40 with nickel
• CPC Class Codes: H02K 1/02 characterised by the magnetic material
• CPC Class Codes: H02K 11/21 Devices for sensing speed or position, or actuated thereby specially adapted for machines having non-mechanical commutating devices H02K29/06, H02K29/14
• CPC Class Codes: H02K 15/165 Balancing the rotor
• CPC Class Codes: H02K 2213/03 Machines characterised by numerical values, ranges, mathematical expressions or similar information
• CPC Class Codes: H02K 3/487 Slot-closing devices
• CPC Class Codes: H02K 3/51 applicable to rotors only

Abstract

A rotor for a rotating electric machine includes a rotor sheet stack arranged on a rotor shaft, and at least one metallic functional component made of a material comprising iron and also chromium in a proportion of at least 18% and at most 19% by weight and optionally nickel in a proportion of at least 12% and not more than 13% by weight.

Claims

1. A rotor for a rotating electric machine, the rotor comprising:

a rotor laminated core arranged on a rotor shaft, and

at least one metallic functional component constructed from a material comprising;

iron, and

chromium in a proportion of between 18% and 19%, inclusive, by weight.

2. The rotor of claim 1, wherein the material of the at least one functional component also includes nickel in a proportion of between 12% and 13%, inclusive, by weight.

3. The rotor of claim 1, wherein the at least one functional component comprises a balancing element.

4. The rotor of claim 1, wherein the at least one functional component comprises an encoder wheel of a rotor position encoder.

5. The rotor of claim 1, wherein the rotor comprises a rotor of an externally excited synchronous machine and comprises:

a plurality of pole teeth, each supporting an exciter winding; and

grooves formed between each adjacent pair of the pole teeth.

6. The rotor of claim 5, wherein the at least one functional component comprises a winding head cover of each exciter winding.

7. The rotor of claim 5, wherein each functional component comprises a groove wedge arranged in a respective groove to close off the groove from an outside area.

8. The rotor of claim 5, wherein each exciter winding is surrounded by a casting compound.

9. The rotor of claim 5, wherein the grooves define cavities that are cast essentially completely with a casting compound.

10. A rotating electric machine, comprising:

a rotor comprising;

a rotor laminated core arranged on of rotor shaft, and

at least one metallic functional component constructed from a material comprising;

iron,

chromium in a proportion of between 18% and 19%, inclusive, by weight.

11. The rotating electric machine of claim 10, wherein the material of the at least one functional component of the rotor also includes nickel in a proportion of between 12% and 13%, inclusive, by weight.

12. The rotating electric machine for of claim 10, wherein the at least one functional component of the rotor comprises a balancing element.

13. The rotating electric machine of claim 10, wherein the at least one functional component of the rotor comprises an encoder wheel of a rotor position encoder.

14. The rotating electric machine of claim 10, wherein the rotating electric machine comprises an externally excited synchronous machine, and wherein the rotor comprises:

a plurality of pole teeth, each supporting an exciter winding; and

grooves formed between each adjacent pair of the pole teeth.

15. The rotating electric machine of claim 14, wherein the at least one functional component rotating electric machine comprises a winding head cover of each exciter winding.

16. The rotating electric machine of claim 14, wherein each functional component rotating electric machine comprises a groove wedge arranged in a respective groove to close off the groove from an outside area.

17. The rotating electric machine of claim 14, wherein each exciter winding rotating electric machine is surrounded by a casting compound.

18. The rotating electric machine of claim 14, wherein the grooves rotating electric machine define cavities that are cast essentially completely with a casting compound.