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. 11, 2017
Filed:
Aug. 05, 2016
Denso Corporation, Kariya, Aichi-pref., JP;
Yuya Fujishima, Kariya, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
In an apparatus, a combination unit selects one of three-phase currents flowing in a three-phase alternating-current rotary electric machine. The combination unit shifts the captured values of at least one of the remaining two phase currents other than the reference phase current by 120 electrical degrees. The combination unit combines the shifted captured values of the at least one of the remaining two phase currents to the captured values of the reference phase current to obtain combined values of the reference phase current. A coefficient calculator integrates, for each of the calculation angles, function values based on the combined values of the reference phase current over the at least one period of the electrical angle of the three-phase rotary electric machine to calculate a Fourier coefficient for the reference phase current.