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Parameter Analysis for Arc snubber of EAST Neutral Beam Injector

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Plasma Science and Technology 2010年第4期12卷 499-505页

作者：王海田李格曹亮党晓强傅鹏 Department of Electrical Engineering Shanghai Jiaotong University Department of Electronic and Information Engineering Jiaying College Institute of Plasma physics Chinese Academy of Sciences

According to the B-H curve and structural dimensions of the snubber by the Fink- Baker Method, the inductive voltage and the eddy current of any core tape with the thickness of the saturated regions are derived when the accelerator breakdown occurs. Using the Ampere＇s law, in each core tape, the eddy current of the core lamination is equal to the arc current, and the relation of the thickness of the saturated regions for different laminations can be deduced. The total equivalent resistance of the snubber can be obtained. The transient eddy current model based on the stray capacitance and the equivalent resistance is analyzed, and the solving process is given in detail. The exponential time constant and the arc current are obtained. Then, the maximum width of the lamination and the minimum thickness of the core tape are determined. The experimental time constant of the eddy current obtained, with or without the bias current, is approximately the same as that by the analytical method, which proves the accuracy of the adopted assumptions and the analysis method.

关键词： EAST NBI B-H curve snubber Ampere's law eddy current arc current

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snubber用高频高压隔离偏置电源研究

电源技术 2012年第1期36卷 111-113,117页

作者：付鹏李格周银贵张晓东王海田中国科学院等离子体物理研究所安徽合肥230031 中国科学技术大学国家同步辐射实验室安徽合肥230029 上海交通大学电气工程系上海200240

一般来说,托卡马克(EAST)装置中的NBI加热系统都是利用snubber来实现保护的。为了优化snubber的结构,通常都给其添加一个偏置直流源,将snubber的性能维持在BH曲线的负饱和点附近,这样能使snubber的质量减小一半。而目前普遍使用的偏置... 详细信息

一般来说,托卡马克(EAST)装置中的NBI加热系统都是利用snubber来实现保护的。为了优化snubber的结构,通常都给其添加一个偏置直流源,将snubber的性能维持在BH曲线的负饱和点附近,这样能使snubber的质量减小一半。而目前普遍使用的偏置直流源是将50/60 Hz的交流电经过高压隔离变压器变压后整流直接得到。50/60 Hz的高压隔离变压器体积大、质量重,将带来移动不便和占用大量空间等缺点,如将50/60 Hz变为高频后经高频高压隔离变压器处理,这一问题就能得到解决。基于高频高压技术进行了EAST snubber高压隔离偏置电源的设计与实验研究。

关键词： EAST snubber 供电模式高频高压隔离变压器 LabVIEW 偏置电源

A NOVEL PASSIVE DUAL ENERGY RECOVERY snubber FOR HIGH POWER GTO CONVERTERS

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Journal of Electronics(China) 1996年第2期13卷 178-187页

作者： He Xiangning B. W. Williams Qian Zhaoming S. J. Finney(Department of Electrical Engineering, Zhejiang University, Hangzhou 310027)(Department of Computing & Electrical Engineering, Heriot-Watt University,Riccarton, Edinburgh EH14 4AS, U. K.) Department of Electrical Engineering Zhejiang University Hangzhou Department of Computing & Electrical Engineering Heriot-Watt University Edinburgh U.K.

A novel passive dual energy recovery snubber circuit is presented where energy trapped in the snubber inductor and capacitor is recovered into the both DC rail and load, without any active devices or resistors. The maximum over-shoot voltage on the switch is fixed, peak switch current is low, circuit reset is fast and the operational range of load current is wide. This circuit is suitable for use in high frequency, single ended power gate turn-off (GTO) thyrister choppers. Main design equations, some simulations and practical results are included.

关键词： snubber Thyrister Converter

A Novel Passive Lossless Soft-Switching snubber for PWM Inverters

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A Novel Passive Lossless Soft-Switching Snubber for PWM Inve...

高电压环境下snubber电源控制系统设计

2009中国控制与决策会议

作者： Wang Qiang,Zhang Huaguang,Chu Enhui,Hou Limin College of information Science and Engineering,Northeastern University,Shenyang 110004

This paper presents a novel passive lossless snubber circuit for pulse-width modulation(PWM) inverters to achieve soft-switching purposes without an extra switch and additional control *** novel passive lossless soft-switching snubber employs an inductor/capacitor snubber circuit for each switching device in an inverter to achieve passive zero-current turn on and zero-voltage turn ***,instead of conventional bulky transformer coupling for energy recovery,three inductors coupled tightly on a single core are used to losslessly recover snubber energy to the input in the proposed *** addition,freewheeling of output phase current of inverters can be realized via energy storage components in the snubber in the dead-time and the effect of dead-time is *** distortion ratio of the output phase current in low output frequency is also *** components in the snubber circuit are passive,thus having a better price/performance ratio than their active *** snubber has been incorporated into a PWM *** results are given to demonstrate the validity and features of the snubber circuit.

关键词： Soft-switching Passive snubber Zero-current turn on and Zero-voltage turn off

来源： cnki会议评论

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皖西学院学报 2016年第5期32卷 59-62页

作者：王珍凤铜陵学院电气工程学院安徽铜陵244000

介绍了在高电压环境下工作的snubber电源控制系统的设计。讨论了基于嵌入式技术的控制系统的软硬件构成。基于可靠性和扩展性的考虑,系统提供了三种控制模式:光纤隔离的RS-232就地控制模式,电源面板上的手操器模式以及扩展用的远控模式... 详细信息

介绍了在高电压环境下工作的snubber电源控制系统的设计。讨论了基于嵌入式技术的控制系统的软硬件构成。基于可靠性和扩展性的考虑,系统提供了三种控制模式:光纤隔离的RS-232就地控制模式,电源面板上的手操器模式以及扩展用的远控模式。根据系统控制需求,描述了上下位机软件的程序流程以及在实现过程中的关键问题。实验测试表明,该系统能在工作电压50kV及以上的高电压环境下可靠工作。该系统结构简明,抗干扰能力强,满足高抗干扰性要求。

关键词：高电压系统设计 snubber

双向可控硅电路完整建模中的snubber电路设计

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电子元器件应用 2010年第1期12卷 66-68,71页

作者：章旭东同济大学超大规模集成电路研究所上海200092

主要讨论了双向可控硅(TRIACs)典型应用电路和缓冲电路(snubber)的设计方法,根据双向可控硅受负载电流过零点控制转向,因而可能在感性负载应用中迫使可控硅误导通的特点,分析了合适snubber电路设计的关键。并通过完整电路的建模方法,分... 详细信息

主要讨论了双向可控硅(TRIACs)典型应用电路和缓冲电路(snubber)的设计方法,根据双向可控硅受负载电流过零点控制转向,因而可能在感性负载应用中迫使可控硅误导通的特点,分析了合适snubber电路设计的关键。并通过完整电路的建模方法,分析了双向可控硅典型应用电路的snubber电路设计。

关键词： TRIACs snubber 误差分析阻尼比峰值电压换向电压上升率

NBI-snubber多终端电源监控系统优化设计

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佳木斯大学学报（自然科学版） 2019年第3期37卷 403-406页

作者：杨路辛煜王茂林赵芳琴安徽公安职业学院信息网络安全监察系安徽合肥230000 北京市遥感信息研究所北京100092

为了进一步提高监控系统的可靠性,满足未来更高电压的NBI实验要求,针对现有监控系统存在的问题,从软硬件两方面进行优化设计。硬件优化设计主要包括供电优化、光纤发送电路优化、采样信号输入电路优化和串口/光纤电路优化等。软件优化... 详细信息

为了进一步提高监控系统的可靠性,满足未来更高电压的NBI实验要求,针对现有监控系统存在的问题,从软硬件两方面进行优化设计。硬件优化设计主要包括供电优化、光纤发送电路优化、采样信号输入电路优化和串口/光纤电路优化等。软件优化提供了多终端的监控方式,主要包括基于Linux环境的上位机控制软件,基于web的访问和短信通知方式。实验测试表明,新的控制系统运行稳定,能够较好的满足NBI实验环境的要求,为NBI束线优先决策控制器的连锁控制和故障保护奠定基础。

关键词： NBI snubber 优化设计

IMPROVEMENTS TO THE PASSIVE LOSSLESS snubberS FOR POWER BRIDGE LEGS

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Journal of Electronics(China) 2001年第3期18卷 260-266页

作者： Barry W. Williams Stephen J. Finney Dept. of Computing & Electrical Engineering Heriot-Watt University Edinburgh EH14 4AS. UKDept. of Computing & Electrical Engineering Heriot-Watt University Edinburgh EH14 4AS. UK

The paper considers three common snubber circuits used on gate turn-off thyristor and/or insulated gate bipolar transistor inverters. The three snubbers are passive lossless circuits for power bridge legs, and the improvements and modifications to these snubber circuits are presented. The comparative features and operation of the three improved energy recovery snubbers are discussed and supported by PSPICE simulations and experimental results.

关键词： snubber Inverter Thyristor Transistor

Detailed Analysis of the Transient Voltage in a JT-60SA PF Coil Circuit

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Plasma Science and Technology 2013年第2期15卷 148-151页

作者： K. YAMAUCHI K. SHIMADA T. TERAKADO M. MATSUKAWA R. COLETTI A. LAMPASI E. GAIO A. COLETTI L. NOVELLO Japan Atomic Energy Agency 801-1 Mukoyama Naka Ibaraki 311-0193 Japan ENEA 1-00044 Frascati Rome Italy Consorzio RFX Euratom-ENEA Association C.so Stati Uniti 4Padova Veneto 35127Italy Fusion for Energy Boltzmannstr 2Garching Bavaria 85748 Germany

A superconducting coil system is actually complicated by the distributed parameters, e.g. the distributed mutual inductance among turns and the distributed capacitance between adjacent conductors. In this paper, such a complicated system was modeled with a reasonably simplified circuit network with lumped parameters. Then, a detailed circuit analysis was conducted to evaluate the possible voltage transient in the coil circuit. As a result, an appropriate （minimum） snubber capacitance for the Switching Network Unit, which is a fast high voltage generation circuit in JT-60SA, was obtained.

关键词： JT-60SA power supply transient voltage snubber PSIM