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. 13, 2015
Filed:
Nov. 30, 2010
Masaki Yamada, Tokyo, JP;
Ryota Kondo, Tokyo, JP;
Ryosuke Kobayashi, Tokyo, JP;
Takashi Kaneyama, Tokyo, JP;
Kazutoshi Awane, Tokyo, JP;
Satoshi Murakami, Tokyo, JP;
Masaki Yamada, Tokyo, JP;
Ryota Kondo, Tokyo, JP;
Ryosuke Kobayashi, Tokyo, JP;
Takashi Kaneyama, Tokyo, JP;
Kazutoshi Awane, Tokyo, JP;
Satoshi Murakami, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A power conversion apparatus includes a high-power-factor converter section converting an AC voltage to a DC voltage, a smoothing capacitor, a DC/DC converter section, and a control circuit. The control circuit controls the high-power-factor converter section such that the power factor of AC is controlled and a DC voltage follows a target value, and performs duty control for semiconductor switching devices such that a DC voltage from the DC/DC converter section to a load follows an instruction value. In accordance with the DC voltage, the control circuit adjusts the DC voltage target value of the high-power-factor converter section such that the duty ratio of the semiconductor switching devices approaches a set value, thereby optimizing the duty ratio of the semiconductor switching devices and reducing power loss.