Patent · US Expired

Electrical machine with permanent magnets

US6459185B1 · kind B1 · utility

44Cited by

8References

16Claims

0Family size

Assignee

Magnet-Motor Gesellschaft fuer magnetmotorische Technik mbH · DE

Inventors

Peter Ehrhart · Birkenfeld, DE
Christian Lucas · Braunschweig, DE

Key dates

Filing date	Apr 30, 2001
Grant date	Oct 1, 2002
Priority date	—
Expiry date	Apr 30, 2021

Classification

Technology area (CPC H)Electricity
CPC primaryH02K16/04
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An electric machine comprising the following features: (a) an outer, first stator part and an inner, second stator part, the two stator parts being coaxial and being radially spaced apart by an intermediate space; (b) each stator part has, facing the intermediate space, a circumferential series of stator poles, at least a partial number of which carries a winding; (c) a rotor part disposed in the intermediate space; (d) the rotor part has a circumferential series of alternating permanent magnets and magnetic flux conducting pieces, said permanent magnets being magnetized in circumferential direction; (e) the width of the permanent magnets—measured in circumferential direction—is larger on the central radius of the rotor part than radially outside and radially inside on the rotor part and the width of the magnetic flux conducting pieces—measured in circumferential direction—is correspondingly smaller on the central radius of the rotor part than radially outside and radially inside on the rotor part.

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