This paper presents a novel multi-stage coupled inductors (MCIs) dual-bridge converter using phase-shifted control strategy with arc current feedforward compensated, aiming to meet the demands of low frequency arc ignition, arc transfer process and multi-mode cutting in plasma cutting power supply. Compared to the conventional half-bridge and full-bridge converters, the proposed (MCIs) dual-bridge converter can suppress the output current ripple greatly, which benefits from inductance coupling and double control frequency. Then, the mathematical model of multi-stage coupled dual-bridge is built, and the phaseshifted control method is studied. Combined with the advantages of (MCIs) dual-bridge converter, the proposed control algorithm with arc current feedforward can solve the arc problems of ignition failure via plasma arc current compensation and pneumatic circuit compensation, which caused by serious current fluctuation during sudden change of air pressure and arc transform frequently in cutting process. To verify the feasibility of the proposed multi-stage coupled dual-bridge converter and control scheme, a 20kW experimental prototype for plasma cutting power supply has been built. The experimental results show that the proposed topology and control scheme help to improve the success rate of arc ignition, reduce the probability of cutting arc breaking, make the power supply more stable and the cutting effect much better.INDEX TERMS Plasma cutting power supply, Coupled multi-stage dual-bridge, Arc current feedforward, Phase-shifted control strategy.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.