Patent · US Expired

Method of making a stator of an electrical machine

US7761975B2 · kind B2 · utility

2Cited by

4References

7Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Eberhard Rau · Ditzingen, DE
Thomas Berger · Ditzingen, DE
Martin Henne · Heubach, DE
Klaus Pflueger · Eberdingen, DE

Key dates

Filing date	Jul 7, 2003
Grant date	Jul 27, 2010
Priority date	—
Expiry date	Apr 25, 2026

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49009
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The method for making a stator includes making individual strip-shaped laminas (15) for it; stacking the laminas (15) to form a stator core (13) with grooves (18) on one side extending through the core; producing a subassembly by inserting a stator winding (17) into the grooves (18); bending the subassembly to form a cylindrical cavity so that the grooves (18) end in the cavity and connecting two ends (23) of the stator core (13) to each other by a welding seam (20) to maintain this configuration. To produce a welding seam of sufficient strength which does not exert excessive influence on magnetic properties, the welding seam depth (TS) is given by TS=0.5 mm*(Hyoke/mm−1)±ΔTS, wherein Hyoke is yoke height and ΔTS is a tolerance value. An electric machine including the stator made by this method is also described.

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