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:
Apr. 15, 2003
Filed:
Nov. 26, 2001
Ballard Power Systems Corporation, Dearborn, MI (US);
Abstract
A rotor for use in an electrical machine having permanent magnets included therein, each permanent magnet between an adjacent pair of poles wherein each adjacent pole has an opposite polarity. Each permanent magnet has a magnetization polarity on its radially-outward surface and each adjacent permanent magnet has the opposite polarity on its radially-outward surface In addition, each pair of permanent magnets have the same magnetic polarity on their adjacently facing surfaces. This arrangement of permanent magnets may be used on electrical machines having either a Lundell-type rotor or salient pole rotor The arrangement of permanent magnets increases the output power and efficiency of the electrical machine while decreasing magnetic noise.