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. 04, 2014
Filed:
Aug. 22, 2012
Hidenori Katou, Nagoya, JP;
Makoto Taniguchi, Obu, JP;
Hidenori Katou, Nagoya, JP;
Makoto Taniguchi, Obu, JP;
Denso Corporation, Kariya, JP;
Abstract
In a control apparatus for an AC electric motor, a dq axis current feedback control unitand a qn axis current feedback control unitexecute a feedback control of higher harmonic components of actual currents id and iq flowing in an AC electric machineto higher harmonic current instruction values Σidkr and Σiqkr. A d axis current instruction value adjusting unitand a q axis current instruction value adjusting unitadd the higher harmonic current instruction values Σidkr and Σiqkr to fundamental current instruction values idr and iqr. Ad axis current feedback control unitand a q axis current feedback control unitexecute a feedback control of a difference between the actual currents id and iq and the sum of the higher harmonic current instruction values Σidkr, Σiqkr and the fundamental current instruction values idr and iqr into zero.