• Proceedings of the KWS Conference
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• 2002.10a
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• pp.361-365
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• 2002

Advancements in silicon phase control (SCR) technologies provide an arc welding power supply that has the capability to allow the alteration of the Alternating Current (AC) welding output. These technologies provide a square wave output involving sixteen frequency selections and multiple balance selections. While an AC out put is known to minimize magnetic disturbances associate with Direct Current (DC), the potentials of a non-sinusoidal waveform have not been explored. The focus of the paper is to determine the effects that the frequency and balance of an AC wave form output will have upon a high speed Submerge Arc (SAW) application. The test matrix of the project includes welding .250" steel plate. Joint type is square groove with a travel speed of 65 IPM. Each of the weld parameters was held constant, only the frequency and/or balance were altered between welds. Each frequency/balance combination involved three-gap spacing. Upon completion of the welds the bead profiles were measured and recorded. A relationships/trends were observed with various frequency and balance values. Optimum frequency and balance values were found for the .250" square groove application which permit consistent weld sizing, ease of slag removal, and minimal plate distortion.

• Proceedings of the KIPE Conference
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• 2014.07a
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• pp.69-70
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• 2014

In this paper, the 50kw submerged arc welding system has AC/DC durable output power and when AC output power is on, it shows control function on frequency, duty and offset. This system is constructed based on parrallel system, set on modular structure minimize the influence from high power into system. Also, it applied the sequence for optimized welding ability which lead it to increased weld quality.

• Proceedings of the KIPE Conference
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• 2013.07a
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• pp.461-462
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• 2013

In this paper, a studied the SAW system being developed shipbuilding and plant industry with changing welding method to progress productivity. It studies a SAW system using one sensor instead previous one which is using two sensors. It suggests SAW system which has AC output with high current makes high speed welding and DC output with accurate arcing makes detailed control.

• Proceedings of the KIPE Conference
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• 2015.07a
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• pp.137-138
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• 2015

본 논문에서는 PIPO로 구성된 서브머지드 아크 용접시스템의 제어와 7개의 동작모드를 가지는 운용 알고리즘을 제안하였다. 또한, 실제 용접 실험에 제안된 알고리즘을 적용하여 AC 출력과 DC 출력 제어 시의 용융속도와 용적이행에 따른 용접부의 차이를 확인하고자 한다.