New Concept for the Characteristic of an Arc Welding Power Source (Report I) : Application in Pulsed MIG/MAG Welding(Physics, Processes, Instruments & Measurements)

概要

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With the growing development of power electronic devices and welding inverters, the control potential ability and dynamic response of power sources have much been improved. This offers the possibility of controlling the welding arc more accurately and effectively. A new concept for the characteristic of an arc welding power source has been put forward: a modern welding power source should not only play the role of power supply, but also the role of a control system for the welding arc. The different phases of the welding arc require different power source output conditions and characteristics. In order to control a welding arc accurately, a composite characteristic of the power source, consisting of different segments with different slopes from -∞ to +∞, including steep-rising characteristics, has been proposed. The application in pulsed MIG welding has been demonstrated to be effective.
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