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:
Jun. 15, 2010
Filed:
Jan. 24, 2007
Bruno Boucher, Gaspe, CA;
Eric Adams, Gaspe, CA;
Simon Cote, Gaspe, CA;
Daniel Massicotte, Saint-Lambert-de-Lauzon, CA;
Bruno Boucher, Gaspe, CA;
Eric Adams, Gaspe, CA;
Simon Cote, Gaspe, CA;
Daniel Massicotte, Saint-Lambert-de-Lauzon, CA;
Eocycle Technologies, Inc., Levis (Quebec), CA;
Abstract
The present invention provides cancellation of cogging torque of a permanent magnet electrical machine using two sets of magnetic elements, one set is mechanically coupled to the stator with the other set being mechanically coupled to the rotor of the machine. At least one of the two sets has permanent magnets with the magnetic elements of the other set being made of permanent magnets or non-magnetized ferromagnetic materials such as soft iron. When the arrangement of the elements of the two sets is properly designed, magnetic attraction and repulsion forces between the magnetic elements of the two sets produces, as the machine operates, an anti-cogging torque which substantially cancels the cogging torque of the machine.