A new PSFB converter-based inverter arc welding machine with high power density and high efficiency

Aksoy, İsmail

doi:10.3906/elk-1212-143

Cited by 6 publications

(4 citation statements)

References 33 publications

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“…In addition to simplicity, another benefit of the RCD reset circuit is that a maximum duty cycle of more than 50% can be achieved with lower MOSFET voltage stress with respect to the reset winding method. However, an RCD clamp circuit can decrease the efficiency of isolated pulse-width modulation (PWM) DC-DC converters, such as forward converters [18]. Since the energy of magnetizing and primary leakage inductors in a switching cycle is dissipated in the RCD circuit, the following equation can be written [19]:…”

Section: Cm-emi Comparison Between Various Core-reset Methodsmentioning

confidence: 99%

Common-mode EMI evaluation of forward converter with various core-reset schemes

Yazdani

Filabadi²

2016

Turk J Elec Eng & Comp Sci

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In switching power converters, electromagnetic emissions can interfere with the normal operation of the converter or other adjacent systems. Among various power converters, forward converters are widely used at low and medium powers that need a transformer core-reset scheme. In this paper, a prediction procedure for conducted commonmode EMI of a single-switch forward converter is presented, and common-mode EMI levels are predicted considering heat-sink parasitic capacitors and main PCB parasitic elements. The accuracy of prediction results is examined via experimental results. In addition, effects of conventional passive core-reset schemes on the conducted EMI are evaluated via experimental results. Along with the passive reset scheme, common-mode EMI of the low-side and high-side active clamps are evaluated. Finally, the EMI comparison between various core-reset techniques is presented.

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Section: Cm-emi Comparison Between Various Core-reset Methodsmentioning

confidence: 99%

Common-mode EMI evaluation of forward converter with various core-reset schemes

Yazdani

Filabadi²

2016

Turk J Elec Eng & Comp Sci

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“…In welding sources based on high-frequency converters [7][8][9], the problem of transformer magnetization usually does not occur. However, the presence of an output rectifier in such sources limits their use only for DC current welding.…”

Section: запропоновано схемне рішення і алгоритм управління зварювальmentioning

confidence: 99%

Impoving energy characteristics of the welding power sources for TIG-AC welding

Burlaka

Lavrova

2019

EEJET

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38 2. Literature review and problem statement The TIG-AC process (Tungsten Inert Gas-Alternating Current) is often used to weld aluminum alloys, in which the AC electric arc burns between a non-fusible tungsten electrode and an aluminum article. The voltage on a welding arc over one half-period may differ from the voltage over another half-period due to the different emission properties of the electrode and the article's metal. Because of this, a DC current component emerges in the welding circuit, which can be up to 70-80 % of the working welding current [2]. This component of the welding current causes the magnetization of the core of the welding transformer, which leads to the growth of the magnetization current and to overheating the transformer. The DC component of the secondary current of the welding transformer can be eliminated by including a capacitor battery into the welding circuit [3]. The advantage of this technique is the ease of implementation. The drawbacks of the technique: complexity of weldin 23 g current regulation, poor mass-size indicators, impossibility to ensure a quality welding process without the use of expensive equipment, low reliability of equipment (battery of electrolytic capacitors).

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“…The voltage produced in the steady state is proportional to the current, which depends on the arc length and electrode diameter. During the transient state of the arcing process, the load varies between open circuit and short circuit (Aksoy 2014;Buso et al 2009). According to O'Brien (2004); Casanueva et al (2011), gas tungsten arc welding (GTAW), or tungsten inert-gas (TIG) welding, is a manual welding process that uses a nonconsumable tungsten electrode to produce the weld.…”

Section: Welding Machines' Load Characteristicsmentioning

confidence: 99%

Power Quality Study and Analysis of Different Arc Welding Machines

Moreira

Silva

Paredes

2018

J Control Autom Electr Syst

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Electrical welding machines are among the most pollutant loads due to their strong nonlinear behavior. As a result, utilities have established new criteria for connecting welding machines in the grid. One approach that can provide good results in this context is based on modeling this special load and performing simulation studies. In this paper, two different computational models were developed in PSCAD/EMTDC to help the connection evaluation process and power quality studies. Furthermore, instead of a conventional power quality analysis, a power theory for non-sinusoidal voltages and currents is needed to analyze three-phase welding machines. The conservative power theory (CPT) allows an advanced analysis of the load's characteristics as it decouples the power factor into different load conformity factors that are associated with specific characteristics in the load. The analysis and discussions are based on simulations and experimental measurements obtained at the terminals of two different welding machines. The results help to demonstrate the main advantage of the CPT compared to conventional approaches, which is related to its general application for single-phase and three-phase disturbing loads under non-ideal supply voltage conditions. Keywords Conservative power theory • Harmonics • Modeling • Nonlinear loads • Power quality • Welding machine 1 Introduction Welding machines are based on the Joule effect; that is, they use the heat dissipated by a current circulation so as to join two metal parts. This requires the passage of a very high current value, and for this reason, welding machines usually use a step-down transformer in order to reduce the applied voltage to very low values. These loads can be directly con-B Alexandre C. Moreira

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A new PSFB converter-based inverter arc welding machine with high power density and high efficiency

Cited by 6 publications

References 33 publications

Common-mode EMI evaluation of forward converter with various core-reset schemes

Common-mode EMI evaluation of forward converter with various core-reset schemes

Impoving energy characteristics of the welding power sources for TIG-AC welding

Power Quality Study and Analysis of Different Arc Welding Machines

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