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:
Aug. 14, 2012
Filed:
Apr. 28, 2008
Kazuo Nishinosono, Osaka, JP;
Kazuo Nishinosono, Osaka, JP;
Funai Electric Co., Ltd., Daito-shi, Osaka, JP;
Abstract
The present invention discloses a separately excited inverter circuit whose switching circuit having a plurality of switching elements and which is capable of minimizing the damage of other switching elements even if any of the plurality of switching elements is short circuited and damaged. The separately excited inverter circuit includes: a switching circuit of which a full bridge circuit applies an AC voltage to the primary winding of the step-up transformer; a control circuit Cfor performing the switching control of a switching circuitwhen receiving a command signal for commanding the control circuit to oscillate from a transmission line for transmitting the command signal for commanding it to start and stop oscillation; terminal voltage monitoring circuitsandfor monitoring a terminal voltage across a gate of MOS-FET forming the switching circuitand outputting a reference voltage when the gate voltage exceeds a predetermined threshold; and a thyristor circuitwhich is connected to the transmission line and to the gate of which the reference voltage is inputted to cause the thyristor circuit to flow a gate current to be turned on, bringing the command signal on the transmission line into cutting off oscillation to stop the oscillation of the control circuit.