A Pulse Step Modulator High-Voltage Power Supply for Auxiliary Heating System on the HL-2A Tokamak

Mao, Xiaohui; Yao, L. Y.; Wang, Ying Qiao; Wang, Ya Li; Li, Qing; Zhang, Meng; Weimin, Xuan

doi:10.1109/tps.2013.2289366

Cited by 22 publications

(6 citation statements)

References 5 publications

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“…As a result, the shorter is the T fu according to formula (2). As shown in formula (5), the collector current I c should also be lower than I m to avoid the transistor's breakdown. Therefore, the maximum collector current I m of the transistor limits the fastest turn-on speed of MOSFETs.…”

Section: Transistor Selectionmentioning

confidence: 99%

“…NOWadays, pulse generators have been widely used in applications including food sterilisation [1], biomedicine [2], plasma physics [3,4], and industry [5]. The research shows that rise/ fall time of high-voltage pulses has a great influence on experimental results, such as the surface potential of material treatment [6], mean electron energy of plasma in parallel-plate capacitive coupled plasma source [7], and ionisation rate distribution in atmospheric pressure plasma jets [8].…”

Section: Introductionmentioning

confidence: 99%

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A high‐voltage solid‐state Marx generator with adjustable pulse edges

et al. 2023

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Most reactors for non‐thermal plasma excitation are capacitive to pulse generators. The density and temperature of electrons in plasma are dominated by the discharging currents which are proportional to the pulse edges. However, adjusting the pulse edges is quite challenging since the switching speed and the inductance and capacitance in the discharging loops dominate them. This study proposes a drive circuit for solid‐state Marx generators with adjustable edges. The drive circuit controls the Miller plateau by adjusting the gate voltage amplitude to adjust both the rise time and fall time of pulses continuously and independently. The influence of the gate voltage on the Miller plateau and the rise time is studied. The feasibility is verified by both simulating and experimental results. An 8‐stage solid‐state Marx generator prototype was built, and 4.8‐kV pulses with a rise time in the range of 79 ns‐22.21 μs were obtained over capacitive loads. Adjusting pulse edges can control the current amplitudes in dielectric barrier discharge loads.

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Section: Transistor Selectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A high‐voltage solid‐state Marx generator with adjustable pulse edges

et al. 2023

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“…Assuming total output voltage V o , delay time T d between consecutive SPMs, the frequency f o and modified duty cycle D o can be calculated as follows [10][11][12]:…”

Section: Working Principle Of Psmmentioning

confidence: 99%

Design and performance analysis of a crowbar-less high voltage power supply based on PSM technique

2018

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A high voltage power supply (HVPS) of rating-40 kV, 5 A is designed and developed based on pulse step modulation (PSM) technique for inductive output tube based RF amplifier. The commercial availability of such power supplies are very limited and that to at a very high cost. In future also, we shall need several PSM based HVPS of various ratings, so in-house development of a high voltage power supply is important to reduce the cost to less than half and also for easy maintenance. The present development is aimed to utilise a modern technique meeting all the important criteria, i.e., solid state based modular construction, crowbar-less design, reliable operation, voltage regulation with higher efficiency, fast response and most importantly easy to service. This paper deals with the design and development of HVPS rated at-40 kV, 5 A by using DSP TMS320F28335 as the main controller along with algorithms for the control system, interlocks and protections, test results, etc.

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“…Same as the HL-2A ECRH system, Pulse Step Modulation (PSM) technology was adopted for the body HVPS of gyrotron which was fed by freewheel motorgenerator and four gyrotrons shared one HVPS. [11] The output voltage of body HVPS could be adjusted from20kV to -80kV, ripple less than 1% and switch-off time less than 10Ps. For convenience, a new body PSM HVPS only for one gyrotron and powered by intercity network was developed to fit for the operation requirement of the test bed.…”

Section: Fig 2 Test Stand For Gyrotron Commissioningmentioning

confidence: 99%

Design and Research of Electron Cyclotron Resonance Heating and Current Dive System on HL-2M Tokamak

et al. 2017

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Abstract.A research has been conducted to develop an 8MW electron cyclotron resonance heating and current drive (ECRH/ECCD) system on HL-2M tokamak. The ECRH system compromise eight 1MW gyrotrons, eight evacuated transmission lines and three launchers. The main purpose of the ECRH system was to suppress the neo-classical tearing modes and control the plasma profile. This paper presents an overview of the design and studies performed in this framework. Some primary test results of the critical components have been released in this paper, e.g. polarizers, power monitor and fast steering launchers.

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A Pulse Step Modulator High-Voltage Power Supply for Auxiliary Heating System on the HL-2A Tokamak

Abstract: Temperature. -A novel method is developed using air as the oxidant. Interestingly, both trans-and cis-olefins give only trans epoxides (II) as the products. -(SCHROEDER, K.; JOIN, B.; AMALI, A. J.; JUNGE, K.; RIBAS, X.; COSTAS, M.; BELLER*, M.; Angew.

Cited by 22 publications

References 5 publications

A high‐voltage solid‐state Marx generator with adjustable pulse edges

A high‐voltage solid‐state Marx generator with adjustable pulse edges

Design and performance analysis of a crowbar-less high voltage power supply based on PSM technique

Design and Research of Electron Cyclotron Resonance Heating and Current Dive System on HL-2M Tokamak

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