A power factor corrected SMPS with improved power quality for welding applications

Narula, Swati ; Singh, Bhim ; Bhuvaneswari, G. ; Pandey, Rahul (2015) A power factor corrected SMPS with improved power quality for welding applications International Journal of Emerging Electric Power Systems, 16 (2). pp. 181-193. ISSN 1553-779X

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Official URL: https://www.degruyter.com/view/j/ijeeps.2015.16.is...

Related URL: http://dx.doi.org/10.1515/ijeeps-2014-0157


This paper presents the analysis, design and implementation of a power factor corrected Arc Welding Power Supply (AWPS) with a boost converter at the front end and three full-bridge (FB) converters connected in parallel at the load end. The modular arrangement of the FB converters offers several meritorious features like usage of power devices with comparatively lower voltage and current ratings, ease of power expandability, easy maintenance, etc. The boost converter operates in continuous conduction mode minimizing the input current ripple and leading to the lowest RMS current thereby improving the input power quality. Individual control loops are designed for each power stage. A dual loop control scheme is employed to incorporate over-current limit on the proposed AWPS which ensures excellent weld bead quality. The proposed AWPS is implemented to validate its performance over a wide range of line/load variations. Test results confirm its fast parametrical response to load and source voltage variations and over-current protection leading to improved welding performance and weld bead quality. The system is found to perform extremely well with very low input current THD and unity power factor, adhering to international power quality norms.

Item Type:Article
Source:Copyright of this article belongs to Walter de Gruyter GmbH & Co. KG.
Keywords:Arc Welding Power Supply; Power Quality; Total Harmonic Distortion
ID Code:106850
Deposited On:07 Aug 2017 13:10
Last Modified:07 Aug 2017 13:10

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