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:
Feb. 26, 2002
Filed:
Jul. 06, 2000
Yoshihisa Okita, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
In a power conversion device including a current control semiconductor switching element, a driving device of the aforementioned switching element is disclosed. The driving device comprises an output main line connected to a base or gate of the switching element, an output return line connected to an emitter or source. A collector current detecting device for detecting a collector current or drain current, and a base current control device for controlling a base current or gate current are provided. The base current control device controls the base current to reduce the sum of conduction loss and drive power in the switching element in accordance with a collector current signal from the collector current detecting device.