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:
Jun. 08, 2021
Filed:
Jul. 28, 2017
Applicant:
Illinois Tool Works Inc., Glenview, IL (US);
Inventor:
Andrew Joseph Henry, Appleton, WI (US);
Assignee:
Illinois Tool Works Inc., Glenview, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23K 9/10 (2006.01); H01F 27/28 (2006.01); H01L 29/739 (2006.01); H01L 29/78 (2006.01);
U.S. Cl.
CPC ...
B23K 9/1043 (2013.01); B23K 9/1056 (2013.01); H01F 27/28 (2013.01); H01L 29/7393 (2013.01); H01L 29/783 (2013.01);
Abstract
Methods and apparatus to provide welding power are disclosed. An example welding-type power supply includes: a transformer having first and second secondary windings; switching elements configured to control current flow from the first and second secondary windings to an output; and a control circuit configured to control the switching elements to selectively output a positive output voltage or a negative output voltage without a separate rectifier stage by selecting, based on an output voltage polarity, a first subset of the switching elements to perform rectification.