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. 18, 2011
Filed:
May. 31, 2007
Takahiro Urakabe, Tokyo, JP;
Matahiko Ikeda, Tokyo, JP;
Akihiko Iwata, Tokyo, JP;
Kiyoharu Anzai, Tokyo, JP;
Hirotoshi Maekawa, Tokyo, JP;
Toshiyuki Kikunaga, Tokyo, JP;
Masaru Kobayashi, Tokyo, JP;
Tatsuya Okuda, Tokyo, JP;
Takahiro Urakabe, Tokyo, JP;
Matahiko Ikeda, Tokyo, JP;
Akihiko Iwata, Tokyo, JP;
Kiyoharu Anzai, Tokyo, JP;
Hirotoshi Maekawa, Tokyo, JP;
Toshiyuki Kikunaga, Tokyo, JP;
Masaru Kobayashi, Tokyo, JP;
Tatsuya Okuda, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
Three or more circuits, in which series-connected low-voltage and high-voltage side switches including MOSFETs including parasitic diodes are connected across positive and negative terminals of each of smoothing capacitors, are connected in series. One of elementary series circuits, each including a capacitor and an inductor, is disposed between any adjacent two of the circuits with the elementary series circuits set to have the same period of resonance. The MOSFETs of rectifier circuits are brought into an ON state simultaneously with the MOSFETs of a driving inverter circuit and brought into an OFF state earlier than the MOSFETs of the driving inverter circuit by a period of time not exceeding a time period equal to (period of resonance)/2. A resonance phenomenon of the capacitor and the inductor is used and conduction loss in the rectifier circuits is reduced in DC/DC power conversion performed through charging and discharging operation of the capacitor.