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:
May. 23, 1995
Filed:
Dec. 01, 1992
George Havas, Youngstown, OH (US);
Arthur L Vaughn, Niles, OH (US);
Ajax Magnethermic Corporation, Warren, OH (US);
Abstract
A high frequency power inverter comprises a power supply, a thyristor for switching the energy from the power supply to a load and a neutral capacitor for storing energy cyclically to assure reverse voltage is applied to the thyristor. A clamp circuit is associated with the switch to limit the ring-up voltage on the capacitor to a preselected value. The clamp circuit is comprised of an inductor having a relatively large value for permitting a gradual leaking of the capacitor voltage during an inverting of the power supply voltage to the load so that the capacitor can ring-up to a higher value than the supply voltage. The inductor is selected so that under all conditions, the voltage on the capacitor will be safely larger than the power supply voltage plus a load voltage peak for a time long enough to assure thyristor turn off.