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. 24, 2025
Filed:
Sep. 28, 2021
Hitachi Mitsubishi Hydro Corporation, Tokyo, JP;
Masahiro Yoshida, Tokyo, JP;
HITACHI MITSUBISHI HYDRO CORPORATION, Tokyo, JP;
Abstract
A power generation device is a primary excitation variable speed pumped-storage power generation device or a primary excitation variable speed power generation device. When an output of a pump turbine or a water turbine is insufficient for a power output equivalent in a vicinity of a fully opened guide vane opening and the rotational speed decreases, an increase in a generator motor output command or a generator output command is stopped, and the stop of the increase in the generator motor output command or the generator output command is canceled after the rotational speed is increased.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile