The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 02, 1999
Filed:
Dec. 06, 1996
Applicant:
Inventors:
Assignee:
Rolls-Royce Power Engineering plc, Newcastle upon Tyne, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
310268 ; 310 89 ; 310 90 ; 310156 ; 310266 ; 310261 ;
Abstract
A rotor disc for use in an electrical machine has circumferential rotor rims mounted thereon. The rotor rim comprises a row of alternate magnets and pole pieces. The magnets are tapered at their radially inner and outer extents and engage with correspondingly tapered surfaces on adjacent pole pieces to prevent relative physical movement therebetween. Each side of the radially inner and outer extents of the magnets may be tapered by a different amount to ensure correct orientation of the magnet polarity.