Patent ID: 11958142
Assignee: ILLINOIS TOOL WORKS INC.
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 7:
8. A method for pulse welding, the method comprising:
controlling, via control circuitry, power conversion circuitry to output welding-type power in a plurality of pulse cycles, each pulse cycle comprising a background phase, a ramp up phase, a peak phase, and a ramp down phase, wherein the controlling the power conversion circuitry comprises:
determining a peak transition voltage as an offset to a peak voltage, wherein the peak transition voltage is lower than the peak voltage;
during the ramp up phase of the pulse cycles, controlling, via the control circuitry, the power conversion circuitry in a current-controlled mode based on comparing an output current of the power conversion circuitry to a target current while ramping up the target current;
in response to reaching the peak transition voltage, switching to controlling the power conversion circuitry during the peak phase in a voltage-controlled mode based on the peak voltage;
during the ramp down phase of the pulse cycles, controlling, via the control circuitry, the power conversion circuitry in the current-controlled mode based on comparing the output current of the power conversion circuitry to the target current while ramping down the target current; and
in response to reaching a background transition voltage, switching to controlling the power conversion circuitry during the background phase in the voltage-controlled mode.