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:
Aug. 28, 2007
Filed:
Aug. 14, 2006
Ryoichi Kurosawa, Tokyo, JP;
Ryoichi Kurosawa, Tokyo, JP;
Abstract
A power conversion apparatus is formed by connecting unit communication-assisting means in series between an alternating-current terminal incorporated in a conventional current-type power conversion apparatus, and an alternating-current load. The communication-assisting means includes reverse-blocking-type self-commutated devices and a capacitor. By controlling the switching of the reverse-blocking-type self-commutated devices, a voltage is generated at the capacitor and additionally used for a power supply commutation operation or load commutation operation. By virtue of this structure, the power conversion apparatus can easily provide a large capacity (high voltage, large current), and can be improved in power factor. Further, the structure enables the number of required fundamental elements to be reduced, and hence enables the power conversion apparatus to be produced easily at low cost.