Patent · US Active

PM rotor having radial cooling slots and corresponding production method

US7948134B2 · kind B2 · utility

3Cited by

4References

5Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Andreas Jöckel · Koblenzer Straße, DE
Thomas Schmidt · Eden Prairie, US

Key dates

Filing date	Dec 19, 2007
Grant date	May 24, 2011
Priority date	—
Expiry date	Dec 19, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49012
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A permanent magnet (PM) rotor has a plurality of partial laminated stacks that are interspaced in the axial direction at a defined distance, thereby defining radial cooling slots. Permanent magnets are arranged in every partial laminated stack in inner pockets. The dimension of every permanent magnet in the axial direction does not or only insignificantly exceed the axial dimensions of the respective partial laminated stack. During assembly, the permanent magnets can be axially pushed through the inner pockets to the respective partial laminated stack (20). The rotor has a very high degree of efficiency.

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