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, 2025
Filed:
Dec. 04, 2023
Okuma Corporation, Aichi, JP;
Satoshi Eguchi, Aichi, JP;
OKUMA CORPORATION, Aichi, JP;
Abstract
A control device, which is configured to control current of a three-phase alternating current motor by d-q axis control, includes a q-axis current controller configured to receive, as one input, an acceleration torque command value τcalculated based on a position command value X, and output a controller output voltage Δeto be added to a q-axis voltage command value v*. The q-axis current controller calculates, based on the acceleration torque command value τ, an acceleration q-axis current command value i*, which is a current command value corresponding to the acceleration torque command value τ, and adds, to the controller output voltage Δe, a value obtained by multiplying the acceleration q-axis current command value i* by an IP coefficient Kindicating a ratio of switching between PI control and I-P control and by a q-axis proportional gain G.