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:
Mar. 23, 1999
Filed:
May. 19, 1997
Applicant:
Inventors:
Kiyoshi Oka, Hitachi, JP;
Osamu Nagura, Hitachinaka, JP;
Assignee:
Hitachi, Ltd, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01D / ;
U.S. Cl.
CPC ...
290 52 ; 318257 ; 307 31 ;
Abstract
An electric power generating installation has a plurality of generator/motor units, each of which has a motor for converting kinetic energy into turning torque, a generator connected mechanically to the motor and connected electrically to an electric power system for converting turning torque into electric energy. A control system is provided for controlling the motor and the generator in such a way that they can be operated stably and continuously. The control system controls the different generator/motor units in different control modes so as to minimize cross current and resonance or beat phenomena.