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:
Jul. 08, 2025
Filed:
Aug. 23, 2021
Hitachi Mitsubishi Hydro Corporation, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Industrial Products, Ltd., Tokyo, JP;
Akira Bando, Tokyo, JP;
Takahiko Kikui, Tokyo, JP;
Kenta Watanabe, Tokyo, JP;
Yasuhiro Kiyofuji, Tokyo, JP;
Masakazu Ishikawa, Tokyo, JP;
Tomomichi Ito, Tokyo, JP;
Masaya Ichinose, Tokyo, JP;
Jun Narushima, Tokyo, JP;
Hikaru Meguro, Tokyo, JP;
HITACHI MITSUBISHI HYDRO CORPORATION, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
HITACHI INDUSTRIAL PRODUCTS, LTD., Tokyo, JP;
Abstract
There is provided an adjustable speed generator motor system with full power converter (FPC system) in which two 3-level converters are connected back-to-back on the DC side, and by providing a mode in which a fly-wheeling diode is forced to conduct a current independently for three phases according to the current polarity and a mode in which the fly-wheeling diode is forced to conduct a current independently for three phases according to magnitude relation of the absolute value of a 3-phase AC current and the current polarity of each phase the FPC system is capable of continuing stable operation.