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:
Apr. 11, 2017
Filed:
Nov. 22, 2012
Shunsuke Nakajima, Tokyo, JP;
Yoshihiko Kimpara, Tokyo, JP;
Shunsuke Nakajima, Tokyo, JP;
Yoshihiko Kimpara, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
There are provided the control device for an AC rotating machine, and the AC rotating machine drive system and an electric power steering system including the control device for an AC rotating machine, which are capable of supplying high-frequency powers, on which high-frequency components corresponding to high-frequency signals input thereto are superimposed, to the AC rotating machine, and calculating a rotational position of the AC rotating machine based on a phase difference between an output torque high frequency contained in an output torque of the AC rotating machine and the high-frequency signals to estimate the rotational position of the AC rotating machine without being constrained by a rotational speed of the AC rotating machine, whether or not the AC rotating machine is electrically salient, and whether or not magnetic saturation has occurred.