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:
Dec. 25, 2012
Filed:
Feb. 02, 2010
Applicants:
Vincent Hall, Elk Mound, WI (US);
Stephen G. Crain, Hudson, WI (US);
Inventors:
Vincent Hall, Elk Mound, WI (US);
Stephen G. Crain, Hudson, WI (US);
Assignee:
McMillan Electric Company, Woodville, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 1/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An electric generator rotor having one or more permanent magnets coupled thereon. The permanent magnets provide a constant magnetic field in the rotor at all times, therein minimizing the effect of rotor residual magnetism on the start-up characteristics of the electric generator. The type and placement of the one or more permanent magnets on the rotor and/or magnetic field confinement techniques may be utilized to control spatial distribution of magnetic field within the rotor.