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Welding power supplies having dynamic current responses

A power supply, welding current technology, used in welding equipment, arc welding equipment, manufacturing tools, etc.

Active Publication Date: 2020-10-30
ILLINOIS TOOL WORKS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While the desired behavior is inherent in DC generators, it is not found in conventional high frequency switched welding power sources

Method used

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  • Welding power supplies having dynamic current responses
  • Welding power supplies having dynamic current responses
  • Welding power supplies having dynamic current responses

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Embodiment Construction

[0015] The disclosed examples provide a method for controlling the current response of an electrode welding process. In stick welding, a short circuit occurs when a droplet of molten metal transfers from the end of the welding electrode to the weld pool.

[0016] Traditionally, electronic / inverter type welding power supplies have a controlled welding current response during a short circuit by limiting the maximum short circuit current that the power supply can deliver. The maximum short-circuit current is controlled by the operator through a so-called "custom arc" control or "arc force" control. Traditionally, "custom arc" or "arc force" control has been accomplished through a knob or other adjustment on the user interface of the power supply. Traditionally, the rate of rise of current is fixed for inverter-type power supplies and does not change as the arc force control setting (ie, current limit) is increased or decreased.

[0017] The disclosed examples provide control of...

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PUM

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Abstract

Welding power supplies having dynamic current responses are disclosed. Example welding power supplies include: power conversion circuitry (102) configured to convert supply power to welding current; avoltage sense circuit (104) configured to measure an output voltage of the power conversion circuitry; and control circuitry (106) configured to: in response to detecting that the output voltage hasdecreased 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.

Description

[0001] related application [0002] This international application claims priority to U.S. Provisional Patent Application No. 62 / 646,958, filed March 23, 2018, entitled "Welding Power Supply with Dynamic Current Response." The entire contents of US Provisional Patent Application No. 62 / 646,958 are incorporated herein by reference. Background technique [0003] The present disclosure relates generally to welding systems, and more particularly to welding power supplies with dynamic current response. [0004] In the past, DC generator type welders have dominated the electrode welding market, and more specifically pipe welding applications. The arc / welding characteristics inherent in the DC generator, dictated by the magnetic design of the motor, provide high quality performance for pipe welding applications. Motor response can be varied by selecting taps on the DC generator magnets and / or changing the impedance in the generator's electric field loop. Conventional electronicall...

Claims

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Application Information

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IPC IPC(8): B23K9/10B23K9/095
CPCB23K9/0953B23K9/1062
Inventor 科迪·J·鲍曼理查德·乔伊斯
Owner ILLINOIS TOOL WORKS INC