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:
Jul. 03, 2001
Filed:
Dec. 22, 1995
Applicant:
Inventors:
Jack Winfield Savage, Centerville, OH (US);
John Riden Suriano, Kettering, OH (US);
Assignee:
Valeo Electrical Systems, Inc., Auburn Hills, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 3/18 ;
U.S. Cl.
CPC ...
H02K 3/18 ;
Abstract
In an electric motor, a conductive ring surrounds, and shields, each pole of stationary magnet. When a changing magnetic flux, produced by an armature, penetrates the ring, by Lenz's Law, the changing flux causes the ring to produce a counter-flux, which adds to the changing flux. Consequently, the total flux within the ring tends to remain constant. Maintaining this constant flux tends to reduce noise and vibration which the changing rotor flux otherwise causes.