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:
Jul. 07, 2009
Filed:
Sep. 12, 2006
Ryousuke Inoshita, Aichi-ken, JP;
Ken-ichi Ohama, Ichinomiya, JP;
Ryousuke Inoshita, Aichi-ken, JP;
Ken-ichi Ohama, Ichinomiya, JP;
DENSO Corporation, Kariya, JP;
Abstract
The control device for controlling a power conversion circuit having voltage-controlled type switching elements includes a control unit generating conduction control signals for controlling conduction states of the switching elements in accordance with an external command, and a driver circuit applying a conduction control terminal of each of the switching elements with one of a first voltage having a value to turn on the switching elements and a second voltage having a value to turn off the switching elements in accordance with the conduction control signals. The driver circuit is configured to change at least one of the value of the first voltage and the value of the second voltage so that a voltage difference between the first and second voltages becomes large when the power loss of the switching elements is estimated to exceed a certain value.