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. 11, 1997
Filed:
Oct. 17, 1995
Kunio Shimano, Yokosuka, JP;
Youichi Nakamura, Fujisawa, JP;
Osamu Ozaki, Tokyo, JP;
Iwao Ohshima, Kawasaki, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A reactor circulating pump system comprises a pump and a power supply apparatus for driving the pump. In the power supply apparatus, an AC/DC converter and a DC/AC converter provided with an AC voltage/frequency adjuster are connected in series between an in-plant AC bus and a reactor circulating pump, a DC voltage adjuster, a superconducting energy storage apparatus and an excitation power supply source are connected to the input side of the DC/AC converter. A controller is incorporated in the power supply apparatus so as to receive a signal indicating instantaneous power failure or power breakdown on the in-plant AC bus, or reactor trip, and change an AC voltage supplied to the reactor circulating pump with a ratio of AC voltage and frequency kept constant for controlling a pump delivery rate to have a predetermined value, while holding an output voltage from the superconducting energy storage apparatus at a predetermined value.