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首页> 外文期刊>Journal of power electronics >Medium Voltage Power Supply with Enhanced Ignition Characteristics for Plasma Torches
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Medium Voltage Power Supply with Enhanced Ignition Characteristics for Plasma Torches

机译：等离子炬具有增强点火特性的中压电源

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摘要

This paper investigates a power supply of medium voltage with enhanced ignition characteristics for plasma torches. A series resonant half-bridge topology is presented as a suitable ignition circuitry. The ignition circuitry is integrated into the main power conversion system of a multi-phase staggered three-level dc-dc converter with a diode front-end rectifier. A plasma torch rated at 3MW, 2kA and having a physical size of lm is selected to be the high enthalpy source for a waste disposal system. The steady-state and transient operations of a plasma torch are simulated. The parameters of a Cassie-Mary arc model are calculated based on 3D magneto-hydrodynamic simulations. The circuit simulation waveform shows that the ripple of the arc current can be maintained within ±10% of its rated value under the presence of a load disturbance. This power conversion configuration provides a high enough ignition voltage, around 5KA, during the ignition phase and high arc stability under the existence of arc disturbance noise resulting in a high-performance plasma torch system. 【Keywords】Half-bridge resonant converter, Medium voltage, Plasma torch, Waste disposal system;
机译：本文研究了用于等离子炬的具有增强点火特性的中压电源。提出了串联谐振半桥拓扑作为合适的点火电路。点火电路已集成到带有二极管前端整流器的多相交错式三电平DC-DC转换器的主电源转换系统中。额定功率为3MW，2kA，物理尺寸为lm的等离子炬被选为废物处理系统的高焓源。模拟了等离子炬的稳态和瞬态操作。 Cassie-Mary电弧模型的参数是基于3D磁流体动力学模拟计算的。电路仿真波形表明，在存在负载干扰的情况下，电弧电流的波动可以保持在其额定值的±10％以内。这种功率转换配置在点火阶段提供了足够高的点火电压（约5KA），并在存在电弧干扰噪声的情况下提供了高电弧稳定性，从而形成了高性能的等离子炬系统。 【关键词】半桥谐振变换器；中压；等离子炬；垃圾处理系统；

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  • 来源
    《Journal of power electronics》 |2011年第4期|p.591-598|共8页
  • 作者

    Kyungsub Jung; Yongsug Suh;

  • 作者单位

    Dept. of Electrical Eng., Chonbuk National University, Jeonju, Korea;

    Dept. of Electrical Eng., Chonbuk National University, Jeonju, Korea;

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