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:
Oct. 15, 1996
Filed:
Nov. 09, 1994
Hiroshi Uchino, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A control device for a power conversion system with a plurality of power converters, each of which is provided with a DC power source, a DC reactor and a unit converter composed of self-turn-off switching devices with DC terminals connected to the DC power source through the DC reactor, in which AC terminals of the plurality of unit converters are connected in common and is connected to an AC load. The control device includes a first unit for generating an instruction value vector for an AC output current of the power conversion system, a second unit for generating a set of actual value vectors showing all of the AC output currents that can be generated by the power conversion system, a third unit for selecting a closest actual value vector that is closest to the instruction value vector out of the set of the actual value vectors, and a fourth unit for controlling the self-turn-off switching devices in the unit converters in response to the closest actual value vector. The AC output current of the power conversion system is thereby controlled so as to track the instruction value vector.