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:
May. 15, 2018
Filed:
Sep. 25, 2014
Meidensha Corporation, Tokyo, JP;
Takashi Yamaguchi, Ota, JP;
Yugo Tadano, Tokyo, JP;
MEIDENSHA CORPORATION, Tokyo, JP;
Abstract
Periodic disturbance occurs in current etc. due to offset error and gain error of a current sensor used in a control device. A voltage command value is generated from a current command value and a current detection value by the current sensor in a current control section. The generated voltage command value is inputted to a plant model section, and a virtual current value is calculated. The virtual current value is inputted to a periodic disturbance observer via a coordinate transform section, and a compensation value is calculated. The compensation value is superimposed on the current detection value via a coordinate inverse-transform section, and the current detection value of the current sensor is corrected.