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. 06, 2010
Filed:
Jul. 18, 2007
Daniel Gizaw, Belleville, MI (US);
David M. Erdman, Fort Wayne, IN (US);
Joseph E. Miller, Fort Wayne, IN (US);
Girma Desta, Suwanee, GA (US);
Daniel Gizaw, Belleville, MI (US);
David M. Erdman, Fort Wayne, IN (US);
Joseph E. Miller, Fort Wayne, IN (US);
Girma Desta, Suwanee, GA (US);
Danotek Motion Technologies, Ann Arbor, MI (US);
Abstract
A direct-drive generator and assembly procedure for that generator include a permanent magnet assembly that is partitioned and assembled piece-by-piece after the rotor and stator have been attached. The magnets are attached to a plate in columns, and adjacent columns have a N-S orientation. The air gap between the rotor and stator is variable, and application of an input torque produces a first cogging torque in a first direction due to the variable air gap that offsets a second cogging torque in a second opposite direction.