US 11,858,073 B2
Systems and methods for efficient provision of arc welding power source
Michael David Madsen, Fremont, WI (US); and Quinn William Schartner, Kaukauna, WI (US)
Assigned to Illinois Tool Works Inc., Glenview, IL (US)
Filed by Illinois Tool Works Inc., Glenview, IL (US)
Filed on Feb. 4, 2020, as Appl. No. 16/781,566.
Application 14/100,832 is a division of application No. 12/486,920, filed on Jun. 18, 2009, granted, now 8,604,384, issued on Dec. 10, 2013.
Application 16/781,566 is a continuation of application No. 15/095,952, filed on Apr. 11, 2016, granted, now 10,549,373.
Application 15/095,952 is a continuation of application No. 14/100,832, filed on Dec. 9, 2013, granted, now 9,308,598, issued on Apr. 12, 2016.
Prior Publication US 2020/0171594 A1, Jun. 4, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. B23K 9/10 (2006.01); H02M 7/5387 (2007.01); B23K 9/095 (2006.01)
CPC B23K 9/1043 (2013.01) [B23K 9/095 (2013.01); B23K 9/1012 (2013.01); H02M 7/5387 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A welding, cutting, or heating circuit, comprising:
an input leg comprising a first capacitor;
a pulse width modulating leg coupled to the input leg, wherein the pulse width modulating leg is configured to convert direct current (DC) voltage from the first capacitor to current in a parasitic output inductance of a load coupled to the pulse width modulating leg, wherein the pulse width modulation leg is configured to function as a bidirectional buck converter;
a steering leg coupled to the pulse width modulating leg, wherein the steering leg is configured to determine a direction of current flow through an output; and
a blocking diode between the first capacitor and a second capacitor to allow current to flow to the output from the first capacitor in an on configuration and to block current to the first capacitor from the second capacitor in an off configuration.