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:
May. 03, 1988
Filed:
Oct. 06, 1986
Osamu Sugimoto, Suita, JP;
Tadaatsu Kato, Takarazuka, JP;
Hidenori Sawa, Hitachi, JP;
Akio Ito, Hitachi, JP;
Hiroshi Sugisaka, Hitachi, JP;
Haruo Nohara, Hitachi, JP;
Masuo Goto, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
The Kansai Elect. Power, Tokyo, JP;
Abstract
A control system for controlling the load of an AC motor/generator of secondary AC excitation type connected to a power system in parallel to at least a synchronous machine. The AC motor/generator has the secondary excitation winding thereof controlled in the amount of excitation so as to generate an output in accordance with an external output command. In the case of variation of power flow between the power system and the synchronous machine, the output command is corrected in accordance with the variation, and the amount of the secondary excitation is controlled by the corrected output command, whereby the variation of power flow between the power system and the synchronous machine is absorbed by the AC motor/generator thereby to prevent the synchronous machine from stepping out.