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. 18, 1976
Filed:
Feb. 11, 1975
Clinton C Christianson, Minnetonka, MN (US);
Robert F Bourke, Wilson, WI (US);
Gould Inc., Rolling Meadows, IL (US);
Abstract
A power converter for operation with a d.c. power supply to provide an output voltage having a level controlled in response to an external control signal. The converter uses a dual chopper configuraton with the out of phase outputs from the respective chopper halves being combined in an interphase transformer. To prevent the interphase transformer from saturating, the chopper control includes an oscillator, counter, D/A converter and phase delay comparator arrangement for maintaining substantially identical duty cycles in the respective legs while, of course, allowing the duty cycles to be varied in unison. The interphase transformer is wound in a configuration which presents a magnetic shunt between the halves of the transformer, said shunt serving to limit transients which might be coupled to the chopper load.