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:
Dec. 26, 1989
Filed:
Dec. 02, 1988
Nagataka Seki, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A power converter device including a plurality of self-commutated voltage type converters each connected to a common dc circuit, a plurality of transformers each having dc windings and ac windings, each of the dc windings being connected to an ac output terminal of a respective one of the converters and each of the ac windings connected in series, an ac switch through which the serially connected ac windings of the transformers are connected to utility power systems, a capacitor provided in the common dc circuit, a dc overvoltage suppression means installed in the common dc circuit, and a current limiting device, wherein the capacitor in the common dc circuit is charged through the current limiting device means before starting the self-commutated voltage type converters, and the dc overvoltage suppression means is then connected to the common dc circuit and removed after the self-commutated voltage type converters are started.