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:
Jun. 02, 2026
Filed:
Mar. 03, 2022
Mitsubishi Electric Corporation, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
In a control device, a phase corrector corrects an error in a phase of an AC power supply detected by a phase detector. A current coordinate transformer transforms detected values of three-phase currents of a converter into dq-axes currents using the corrected phase. A current controller calculates a voltage command so that current commands of the converter and the dq-axes currents match each other. A voltage coordinate transformer transforms the voltage command into three-phase voltage commands using the corrected phase. An estimator estimates an inductance of a reactor using the voltage commands and the dq-axes currents. The phase corrector corrects a phase detection error using the voltage commands, the dq-axes currents, and an impedance of the reactor. The current controller updates a current control gain using the inductance estimated by the estimator.