US 12,186,841 B2
Method and apparatus for providing welding type power with flux balancing
Quinn W. Schartner, Kaukauna, WI (US); Bernard J. Vogel, Troy, OH (US); and Andrew D. Nelson, Grand Chute, WI (US)
Assigned to Illinois Tool Works Inc., Glenview, IL (US)
Filed by Illinois Tool Works Inc., Glenview, IL (US)
Filed on Oct. 28, 2021, as Appl. No. 17/512,835.
Application 17/512,835 is a continuation of application No. 14/536,058, filed on Nov. 7, 2014, granted, now 11,161,193.
Application 14/536,058 is a continuation in part of application No. 14/469,788, filed on Aug. 27, 2014, granted, now 9,862,052, issued on Jan. 9, 2018.
Application 14/469,788 is a continuation of application No. 13/839,235, filed on Mar. 15, 2013, granted, now 10,112,251, issued on Oct. 30, 2018.
Claims priority of provisional application 61/674,780, filed on Jul. 23, 2012.
Prior Publication US 2022/0048128 A1, Feb. 17, 2022
Int. Cl. B23K 9/10 (2006.01); H02M 3/28 (2006.01); H02M 1/00 (2006.01); H02M 1/40 (2007.01)
CPC B23K 9/1043 (2013.01) [B23K 9/1056 (2013.01); B23K 9/1062 (2013.01); H02M 3/285 (2013.01); H02M 1/007 (2021.05); H02M 1/40 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A welding-type power supply comprising:
a dual stacked boost preregulator, providing a pregulated signal and having a preregulator control input;
a switched output converter, disposed to receive the preregulated signal and to provide a welding type power output, and having a transformer and a control input;
a controller, having a preregulator control output connected to the preregulator control input, a current balance module, wherein the preregulator control output is responsive to the current balance module.