Patent · US Active

Permanent magnet rotor with flux concentrating pole pieces

US8710711B2 · kind B2 · utility

5Cited by

6References

9Claims

0Family size

Assignee

HOGANAS AB (PUBL) · SE

Inventors

Lars-Olov Pennander · Helsingborg, SE
Alan Jack · Hexham, GB
Glynn James Atkinson · Tynemouth, GB

Key dates

Filing date	Dec 11, 2012
Grant date	Apr 29, 2014
Priority date	—
Expiry date	Dec 11, 2032

Classification

Technology area (CPC H)Electricity
CPC primaryH02K1/2791
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A permanent magnet machine is provided including a stator and a rotor, the rotor being adapted to rotate relative to the stator, the rotor including a plurality of permanent magnets separated in the circumferential direction from each other by radially extending rotor pole pieces for concentrating the magnetic flux from the permanent magnets, the stator having a structure that defines radial limits of an air gap between the stator and the rotor for communicating magnetic flux between the stator and the rotor, wherein at least some of the permanent magnets extend radially outside the radial limits of the air gap as defined by the stator structure.

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