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:
Sep. 02, 2003
Filed:
Apr. 23, 2001
Kazuyuki Itoh, Tokyo, JP;
Yoshihisa Okita, Tokyo, JP;
Katsuaki Tanaka, Tokyo, JP;
Yoshinobu Takayanagi, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A power conversion apparatus capable of reducing the conduction loss to achieve high efficiency yielding a downsized and weight-reduced apparatus and a method for driving such a power conversion apparatus is disclosed. A power conversion apparatus comprising a switching-element driving circuit which includes a current transformer having a primary coil connected to an current control type switching element, and a driving-current generating circuit formed of a secondary coil of the current transformer and a rectifying circuit connected to the secondary coil, wherein an output current generated in the driving-current generating circuit is supplied to the switching element as a driving current of the switching element, and a method for driving the switching element of such a power conversion apparatus are disclosed. This method comprises the steps of detecting an output current of the switching element, and extracting a part of the output current of the driving-current generating circuit out of the switching-element driving circuit so as to variably controlling the driving current of the switching element in response to the output current of the switching element. Preferably, the output current of the driving-current generating circuit extracted out of the switching-element driving circuit is supplied to any other auxiliary power supply as a regenerative power.