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 separately-excited inverter circuit for performing the protecting operation upon the rise in the output voltage caused by the contact failure includes a switching circuitwhich applies the AC to a primary coil of a pressure-rising transformer, a control circuit Cwhich starts a switch control of the switching circuitupon an input of a command signal to set an oscillation state ON from a transmission line for the command signal to command to set the oscillation state ON and OFF, an output voltage monitor circuitwhich allows a comparatorto compare an output voltage of the separately-excited inverter circuit with a predetermined voltage, and to output a predetermined reference voltage when the output voltage is higher than the predetermined voltage, and a thyristor circuitwhich is turned ON to set the transmission line of the command signal into an oscillation OFF state upon the input of the reference voltage to the gate to stop a switch control of the control circuit C. The output voltage monitor circuitoutputs the reference voltage to make a time width sufficient to turn the thyristor circuitON using a hysteresis of the comparator