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. 03, 2025
Filed:
Jul. 09, 2019
Mitsubishi Electric Corporation, Tokyo, JP;
Yuki Taniyama, Tokyo, JP;
Kenji Takahashi, Tokyo, JP;
Yuichi Shimizu, Tokyo, JP;
Yasuhiko Wada, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
A drive device includes a power converter, a first magnetic pole position identification unit, a second magnetic pole position identification unit, a subtractor, and a current control unit. The power converter supplies power to a main-side synchronous motor and a sub-side synchronous motor connected in parallel. The subtractor obtains an angular difference using the magnetic pole position of the rotor of the main-side synchronous motor identified by the first magnetic pole position identification unit and the magnetic pole position of the rotor of the sub-side synchronous motor identified by the second magnetic pole position identification unit. A magnetic flux current command compensation unit adjusts the absolute value of a magnetic flux current command based on the angular difference. The current control unit controls the power converter using a torque current command and the magnetic flux current command with the absolute value adjusted by the magnetic flux current command compensation unit.