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:
Jun. 03, 2014
Filed:
Feb. 26, 2010
Junnosuke Nakatsugawa, Hitachi, JP;
Yoshitaka Iwaji, Hitachinaka, JP;
Norihisa Iwasaki, Hitachi, JP;
Hirokazu Nagura, Hitachi, JP;
Junnosuke Nakatsugawa, Hitachi, JP;
Yoshitaka Iwaji, Hitachinaka, JP;
Norihisa Iwasaki, Hitachi, JP;
Hirokazu Nagura, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The present invention relates to an AC motor control device and, particularly, to provide an AC control device capable of simply setting a state quantity of an AC motor non-linearly variable, in accordance with the motor driving state and using the setting in motor control, the present invention can be achieved by including a state quantity calculating unit () for calculating a state quantity corresponding to a coil interlinkage flux which is an internal quantity of the motor, calculating a setting value of the coil interlinkage flux defined on one axis out of two axes, that is, d and q axes, with a function formula using a current defined on the same one of the axes and a function formula using a state variable defined on the other one of the axes.