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:
Nov. 01, 2016
Filed:
Aug. 07, 2015
Nsk Ltd., Shinagawa-ku, Tokyo, JP;
Kei Kondo, Kanagawa, JP;
Toshiaki Oguchi, Kanagawa, JP;
Yusuke Imai, Kanagawa, JP;
Tomoki Watanabe, Kanagawa, JP;
NSK LTD., Tokyo, JP;
Abstract
There are provided an angle detection apparatus configured to correct an error included in angle information output from a multipolar angle detector, a motor having the angle detection apparatus, a torque sensor, an electric power steering apparatus, and a vehicle. A multiplication circuit () generates digital electrical angle information (θed) from analog angle information output from a multipolar optical encoder (), a first differentiatordifferentiates the electrical angle information (θed) to operate an electrical angular velocity (ωed), a first discontinuity correction circuit () carries out processing of correcting a discontinuity of an angular velocity in a temporal change for the electrical angular velocity (ωed), and a digital filter () carries out correction processing of reducing a high-frequency noise component for an electrical angular velocity (ωedc) corrected by the first discontinuity correction circuit ().