NDLI: Reverse voltage generating circuit for rapid commutation of output current polarity in variable polarity arc welding power supply

Content Provider	IET Digital Library
Author	Yu, Yang Zhong Ming, Zhu Zhi Bo, Liu
Abstract	The topology of variable polarity (VP) arc welding power supply is composed of a first inverting stage responsible for the adjustment of output current amplitude and a second inverting stage used for the commutation of output current polarity. A reverse voltage generating (RVG) circuit is proposed, which could be applied in the second inverting stage of a VP arc welding power supply to generate a stable reverse voltage with fixed amplitude during the commutation procedure and to make the commutation rate of output current more rapidly. First, a basic circuit unit is designed to illustrate the operating principle of the RVG circuit. Then, the Pspice simulations for the comparison between the RVG circuit and the conventional RC resonant circuit in the half-bridge applications of second inverting stage are carried out to illustrate the superiority of RVG circuit. Finally, an experimental prototype of VP arc welding power supply is established to test and verify the proposed RVG circuit. The experimental waveforms of output current and voltage demonstrate that the RVG circuit is effective and suitable for generating a stable reverse voltage with fixed amplitude, and realizing a rapid commutation of the output current polarity in VP arc welding power supply.
Starting Page	1609
Ending Page	1616
Page Count	8
ISSN	17554535
Volume Number	10
e-ISSN	17554543
Issue Number	Issue 12, Oct (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/10/12
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2016.0748
Journal	IET Power Electronics
Publisher Date	2017-06-15
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Arc Welding Joining Processes And Welding Output Current Polarity Power Conversion Topology Reverse Voltage Generating Circuit RVG Circuit Variable Polarity Arc Welding Power Supply VP Arc Welding Power Supply
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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