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. 17, 2009
Filed:
Aug. 10, 2005
Ryuichi Furukoshi, Niiza, JP;
Akio Iwabuchi, Niiza, JP;
Ryuichi Furukoshi, Niiza, JP;
Akio Iwabuchi, Niiza, JP;
Sanken Electric Co., Ltd., Niiza-shi, JP;
Abstract
There are included an actuation unit supplying an actuation power to a control unit to start a switching operation of a switching element when an alternating-current power sources turned on, and stopping supply of the actuation power to the control unit after the switching operation of the switching element is started; an overheat detection unit being thermally coupled with the actuation unit and detecting an abnormal condition due to overheating of the actuation unit; a latch maintaining an inoperative state of the switching element at the event of an abnormal condition other than the abnormal condition due to overheating of the actuation unit; and an actuation controller configured to discharge an electrical charge of a smoothing capacitor while the latch maintains the inoperative state of the switching operation to speedily reset the latch unit when the alternating-current power source is turned off, and to stop the actuation unit in response to a detection signal from the overheat detection unit.