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:
Sep. 22, 2020
Filed:
Jun. 14, 2019
Okuma Corporation, Niwa-gun, Aichi, JP;
Satoshi Eguchi, Aichi, JP;
OKUMA CORPORATION, Niwa-Gun, Aichi, JP;
Abstract
A position control device includes a subtracter for subtracting a q-axis current detection value iq from a q-axis current command value iq* to output a q-axis current error Δiq, an adder for adding a q-axis current compensation amount iqc* for compensating for response timing of q-axis current to the q-axis current error Δiq, a q-axis current controller for amplifying an output of the adder by I-P control to calculate a q-axis voltage error Δvq and calculating a q-axis voltage command value vq* on the basis of the q-axis voltage error Δvq, and a second adder for adding a q-axis voltage feedforward amount vqf corresponding to a time derivative value s·iq of the q-axis current to the q-axis voltage command value vq* to calculate a final q-axis voltage command value.