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:
Mar. 31, 2026
Filed:
Dec. 28, 2020
Hitachi Astemo, Ltd., Hitachinaka, JP;
Shun Taniguchi, Tokyo, JP;
Kazuaki Tobari, Tokyo, JP;
Noriya Nakao, Tokyo, JP;
Toshiyuki Ajima, Tokyo, JP;
Kenichi Yoshida, Hitachinaka, JP;
Kentaro Matsuo, Hitachinaka, JP;
Eigo Kishimoto, Hitachinaka, JP;
Hitachi Astemo, Ltd., Hitachinaka, JP;
Abstract
There is provided a synchronous machine control device capable of improving the performance of a motor without complicating a control system. The synchronous machine control device controls a power converter () that supplies electric power to a synchronous machine (). The synchronous machine control device includes a first magnetic flux command computation unit () that computes a first magnetic flux command value (φd*, φq*) from a current command value (Id*, Iq*) of the synchronous machine (), a magnetic flux estimation unit () that estimates a magnetic flux value (φdc, φqc) of the synchronous machine () from a current detection value (Idc, Iqc) of the synchronous machine (), and a voltage computation unit () that creates a voltage command value (Vd*, Vq*) of the power converter such that the first magnetic flux command value (φd*, φq*) coincides with the magnetic flux value (φdc, φqc).