US 9,808,880 B2
Remote sense lead magnitude and polarity controller
Edward Michael Furman, Mentor, OH (US)
Assigned to Lincoln Global, Inc., City of Industry, CA (US)
Filed by Lincoln Global, Inc., City of Industry, CA (US)
Filed on Oct. 20, 2014, as Appl. No. 14/518,272.
Application 14/518,272 is a division of application No. 11/550,120, filed on Oct. 17, 2006, granted, now 8,969,763.
Prior Publication US 2015/0034619 A1, Feb. 5, 2015
Int. Cl. B23K 9/10 (2006.01); B23K 9/12 (2006.01); B23K 9/32 (2006.01); B23K 9/095 (2006.01)
CPC B23K 9/10 (2013.01) [B23K 9/0953 (2013.01); B23K 9/124 (2013.01); B23K 9/32 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A feedback control device for generating a feedback signal used to adjust a power output for a welding power supply electrically connected with first and second sense leads coupled respectively to an electrode and a workpiece, the first and second sense leads communicate first and second sense lead signals respectively during a welding operation, the feedback control device comprising:
a scaling circuit that receives the first and second sense lead signals, and outputs scaled sense lead signals, wherein the scaling circuit includes a voltage divider network comprising a plurality of resistor components connected in series between the first and second sense leads and a reference voltage;
a pair of rectifier circuits that each accept one of the scaled sense lead signals, outputted from the scaling circuit, that each represent a parameter of a welding process, wherein each rectifier circuit separately rectifies and inverts the respective scaled sense lead signal to create a plurality of rectified outputs representing at least a magnitude component and a polarity component of the respective scaled sense lead signal; and
a logic processor having at least one input corresponding to each of the plurality of rectified outputs, the logic processor configured to:
cycle through a logic function that generates the feedback signal responsive to the plurality of rectified outputs; and
communicate the feedback signal to the welding power supply, wherein the power output of the welding power supply is adjusted during the welding operation based on the feedback signal.