Patent · US Active

Cage rotor with starting bar

US8963394B2 · kind B2 · utility

13Cited by

3References

25Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Klaus Büttner · Hollstadt, DE
Klaus Kirchner · Nidderau, DE
Michael Müller · Hennef (Sieg), DE

Key dates

Filing date	Aug 13, 2010
Grant date	Feb 24, 2015
Priority date	—
Expiry date	Aug 18, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH02K15/023
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention relates to a cage rotor for an asynchronous machine (1) comprising starting bars for improving the starting behavior. The invention further relates to a method for producing such a cage rotor. In order to achieve as great an efficiency as possible, the cage rotor comprises a laminated rotor core (2) having grooves (3) and operating bars (5; 6; 7; 8; 15) disposed in the grooves (3) and contacting the laminated rotor core (2) directly on the inner groove base as seen in the radial direction of the cage rotor, wherein the operating bars (5; 6; 7; 8; 15) comprise partial cladding (9; 10; 11) enclosing an outer surface of the operating bars (5; 6; 7; 8; 15) as seen in the radial direction (12) of the cage rotor, wherein the material of the operating bars (5; 6; 7; 8; 15) comprises a greater specific conductivity than the material of the partial cladding (9; 10; 11).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.