Single phase bridgeless welding source with reduced semiconductor devices and improved power quality
Keywords:Bridgeless Converter, Power Factor Correction, Two Switch Forward Converter, Arc Welding Source.
This paper presents a single phase bridgeless (BL) converter-based welding source with reduced semiconductor devices with improvement power quality at AC mains. The proposed BL welding source consists of two stages configuration. In first stage configuration bridgeless boost converter operated in continuous conduction mode (CCM), to achieve power factor near unity and input source current less than 5%. In second stage isolated two switch forward converter (TSWFC) is used to drive welding load with high frequency step down transformer (HFT). HFT provide electrical isolation between input supply and welding load. Output current control with short circuit handling capability is also ensured to achieve smooth and strong welding. The removal of diode bridge rectifier in BL converter at the input side, results in conduction loss reduction, increased efficiency and better thermal stability as compared to other conventional power factor correction (PFC) rectifiers. The controller performance is simulated in MATLAB SIMULINK and realized on a hardware prototype for validation of proposed concepts. The obtained results are presented for demonstration of effectiveness of proposed concept.
 B. Singh, S. Singh, A. Chandra, & K. Al-Haddad, Comprehensive Study of Single-Phase AC-DC Power Factor Corrected Converters with High-Frequency Isolation, IEEE Transactions on Industrial Informatics, vol. 7, no. 4, (2011), pp. 540-556. https://doi.org/10.1109/TII.2011.2166798.
 J. C. Dias, & T. B. Lazzarin, A Family of Voltage-Multiplier Unidirectional Single-Phase Hybrid Boost PFC Rectifiers, IEEE Transactions on Industrial Electronics, vol. 65, no.1, (2018), pp. 232-241. https://doi.org/10.1109/TIE.2017.2721919.
 S. Narula, B. Singh, G. Bhuvaneswari & R. Pandey, Improved Power Quality Bridgeless Converter-Based SMPS for Arc Welding, IEEE Transactions on Industrial Electronics, 64(1), (2017), pp. 275-284. https://doi.org/10.1109/TIE.2016.2598519.
 E. H. Ismail, Bridgeless SEPIC Rectifier with Unity Power Factor and Reduced Conduction Losses, IEEE Transactions on Industrial Electronics, vol. 56, no. 4, (2009) pp. 1147â€“1157. https://doi.org/10.1109/TIE.2008.2007552.
 S.J. Jeon, G.H. Cho, Zero-voltage and zero-current switching full-bridge DCâ€“DC converter for arc welding machines, Electron. Lett. vol. 35, issue. 13, Jun. 1999, pp. 1043-1044. https://doi.org/10.1109/TIE.2008.2007552.
 T. Madhulingam, T. Subbaiyan, P. Shanmugam, S. Kannan, Design and development of improved power quality based micro-butt-welding power supply, IET Power Electronics, vol. 10, issue.7, (2017),746-755. https://doi.org/10.1049/iet-pel.2016.0372.
 Y. Du, J. Wang, A.Q. Huang, Modeling of the High-Frequency Rectifier With 10-kV SiC JBS Diodes in High-Voltage Series Resonant Type DCâ€“DC Converters, IEEE Transactions on Power Electronics, vol. 29, issue. 48 (Aug. 2014), pp. 4288-4300. https://doi.org/10.1049/iet-pel.2016.0372.
 International Standard IEC 61000-3-2, (2004). Limits for Harmonic Current Emissions (Equipment input current â‰¤16 A per phase.
 IEEE Guide for harmonic control and reactive compensation of Static Power Converters, IEEE Standard 519-1992.
 MH. Rashid, Power electronics handbook: devices, circuits, and applications, vol. 19. Academic Press, 2006, p. 525â€“30.
 A. Karaarslan, The Implementation of Bee Colony Optimization Algorithm to Sheppardâ€“Taylor PFC Converter, IEEE Transactions on Industrial Electronics, 60(9), (2013), 3711â€“3719. https://doi.org/10.1109/TIE.2012.2204711.
 J.G. Ziegler, N.B. Nichols, Optimum settings for automatic controllers, Trans ASME (1942) 64:759-68.