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:
Oct. 14, 2025
Filed:
Aug. 31, 2021
Hitachi Astemo, Ltd., Hitachinaka, JP;
Shun Taniguchi, Tokyo, JP;
Noriya Nakao, Tokyo, JP;
Kazuaki Tobari, Tokyo, JP;
Toshiyuki Ajima, Tokyo, JP;
Kentaro Matsuo, Hitachinaka, JP;
Hitachi Astemo, Ltd., Hitachinaka, JP;
Abstract
Disclosed is a synchronous machine control device capable of suitably executing stabilization control of a synchronous machine. This synchronous machine control device controls a power converter () to which a synchronous machine () is connected, and comprises: a first magnetic flux command calculation unit () that calculates a first magnetic flux command value from an electric current command value of the synchronous machine; a magnetic flux estimation unit () that estimates a magnetic flux value of the synchronous machine from an electric current detection value of the synchronous machine; a voltage calculation unit () that generates a voltage command value for the power converter such that the first magnetic flux command value and the magnetic flux value match; and a damping ratio control unit () that, on the basis of a vibration component of the magnetic flux value, generates a correction amount for the voltage command value such that the vibration component is damped.