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. 23, 2018
Filed:
Mar. 24, 2016
Mitsubishi Electric Corporation, Chiyoda-ku, JP;
Toshiba Mitsubishi-electric Industrial Systems Corporation, Chuo-Ku, JP;
Toshiyuki Fujii, Chiyoda-ku, JP;
Takushi Jimichi, Chiyoda-ku, JP;
Kaho Mukunoki, Chiyoda-ku, JP;
Ryosuke Uda, Chiyoda-ku, JP;
Taichiro Tsuchiya, Chuo-Ku, JP;
Akihiro Matsuda, Chuo-Ku, JP;
Hisanori Taguchi, Chuo-Ku, JP;
MITSUBISHI ELECTRIC CORPORATION, Chiyoda-ku, JP;
TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION, Chuo-ku, JP;
Abstract
When switching operations of converter cells are stopped due to temporary voltage reduction in an AC system, a voltage determination unit performs determination regarding a voltage of each DC capacitor after a predetermined period has passed, and a charge control unit transmits a charging gate signal, via a gate control unit, to select a converter cell at a voltage level at which a self-feeding circuit of the converter cell is operable. Thus, a DC capacitor of a converter cell whose voltage is lower than the voltage level at which a self-feeding circuit is operable is charged, thereby enabling switching operations of all the converter cells.