Welding power supplies having dynamic current responses
AssigneeIllinois Tool Works Inc.
InventorsCody J. Bowman, Richard Joyce
Life of this patent
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Abstract
Welding power supplies having dynamic current responses are disclosed. Example welding power supplies include: power conversion circuitry configured to convert supply power to welding current; a voltage sense circuit configured to measure an output voltage of the power conversion circuitry; and control circuitry configured to: in response to detecting that the output voltage has decreased below a lower voltage limit: control an increasing ramp rate of the welding current output by the power conversion circuitry; and in response to detecting that the output voltage has increased above the lower voltage limit, control a decreasing ramp rate of the welding current output by the power conversion circuitry.
Claims21
A welding power supply, comprising:
- power conversion circuitry configured to convert supply power to welding current;
- a voltage sense circuit configured to measure an output voltage of the power conversion circuitry;
- and
- control circuitry configured to:
- when the output voltage is between a first upper voltage limit and a lower voltage limit, control the power conversion circuitry to output the welding current to substantially match an amperage parameter;
- when the output voltage is above the first upper voltage limit and below a second upper voltage limit, control the power conversion circuitry to output the welding current based on a first voltage-amperage relationship;
- and
- in response to detecting that the output voltage has decreased below the lower voltage limit:
- control an increasing ramp rate of the welding current output by the power conversion circuitry;
- and
- in response to detecting that the output voltage has increased above the lower voltage limit, control a decreasing ramp rate of the welding current output by the power conversion circuitry.
21-25. (canceled)
Dependencies are inferred from the claim text.