Illinois Tool Works Inc.
SYSTEMS AND METHODS TO CONTROL WELDING PROCESSES USING A VOLTAGE-CONTROLLED CONTROL LOOP

Abstract:

An example welding-type power supply, includes: power conversion circuitry configured to convert input power to welding-type power; and control circuitry configured to: control the power conversion circuitry to output the welding-type power based on a voltage-controlled control loop; and in response to detecting an output voltage less than a threshold voltage: during a first state, control the voltage-controlled control loop based on a first value of a control parameter of the voltage-controlled control loop to increase a response rate of the voltage-controlled control loop; and during a second state following the first state, control the voltage-controlled control loop based on a second value of the control parameter, wherein the second value of the control parameter causes a reduction in energy output by the power conversion circuitry relative to the first state.