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:
Aug. 31, 1993
Leonard J Hitchcock, Montrose, PA (US);
Ronnie A Wunderlich, Endicott, NY (US);
International Business Machines Corp., Armonk, NY (US);
Abstract
A circuit for producing one or more regulated auxiliary voltages from a single zero-volt full bridge power stage without degrading the zero-volt switching action. The freewheeling diode used in previous magnetic amplifiers is no longer needed. Transformer current is carried to an auxiliary output inductor through a gate winding of a saturable reactor while a second saturable reactor is reset. Current from the output inductor normally diverted through the freewheeling diode is provided to the transformer through the first saturable reactor just before the transformer provides a pulse of opposite polarity thus discharging the capacitance of the primary switches and enhancing the full bridge zero-volt switching process.