Patent · US Expired

Stator for an electric machine excited by permanent magnets

US4412145A · kind A · utility

20Cited by

3References

3Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Erich Voss · Bad Neustadt an der Saale, DE
Horst Grafenschnell · Bad Neustadt an der Saale, DE

Key dates

Filing date	Jan 27, 1982
Grant date	Oct 25, 1983
Priority date	—
Expiry date	Jan 27, 2002

Classification

Technology area (CPC H)Electricity
CPC primaryH02K1/17
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Arcuate permanent magnets are inserted into the bore hole of a stator intended for use in an electric machine which is excited by permanent magnets. Spring elements, inserted into recesses in the wall of the bore between the magnets, have spring arms which are connected to each other via a back part and which rest against axially extending lateral edges of the permanent magnets. To insure retention of the permanent magnets against high mechanical shock stresses without connecting the spring elements to the stator, the spring elements are provided with extensions, formed on their back parts, which frictionally engage undercuts in the recesses. The spring arms themselves extend around the lateral edges of the permanent magnets in a form-locking manner.

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