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:
Oct. 07, 2014
Filed:
Apr. 29, 2010
Applicant:
Jan Doornenbal, Harmelen, NL;
Inventor:
Jan Doornenbal, Harmelen, NL;
Assignee:
Aktiebolaget SKF, Gothenburg, SE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K 29/08 (2006.01); G01D 5/245 (2006.01); G01D 5/249 (2006.01);
U.S. Cl.
CPC ...
G01D 5/2492 (2013.01); G01D 5/2452 (2013.01);
Abstract
A unit of absolute rotary position encoding, where the angular range of encoding is matched to the number of poles of an electrical motor it is intended that the encoder is to be attached to. The electrical motor is suitably a brushless DC motor. This provides unique rotational position values only through an angle corresponding to an angle between two consecutive poles to enable control/drive electronics to accurately and smoothly turn the rotor from standstill and at low speeds with varying loads applied to the motor.