Study on a Marx generator with high‐voltage silicon‐stacks instead of isolating inductances

Chen, Rong; Yang, Jian; Cheng, Xinbing; Qian, Bao‐Liang

doi:10.1049/hve.2019.0138

Cited by 7 publications

(5 citation statements)

References 12 publications

(11 reference statements)

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“…Reducing the size of the switching components facilitates the opening to improve the compactness of the switching elements. Stereo stacking is an effective method used extensively in MARX, linear transformer driver circuits [23][24][25][26]. The maximum potential difference between the series circuit boards is 24 kV, the breakdown distance of air is 0.8 cm, and its distance is set to 1.5 cm.…”

Section: Experiments Platformmentioning

confidence: 99%

A novel high‐voltage solid‐state switch based on the SiC MOSFET series and its overcurrent protection

Sun

Liao

et al. 2022

High Voltage

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All‐solid‐state switches are one of the core components of pulsed power supply systems. However, the voltage level of a single switch is limited. By optimizing the chip structure, the voltage level of a single switch can be improved. Due to the immaturity of the production process and the positive correlation between the blocking voltage and the on‐resistance of the switch, it is difficult to improve the blocking voltage and the continuous forward current of a single switch simultaneously. The series‐connected switch is a way to increase the switch's blocking voltage without reducing the switch's continuous forward current. Magnetically coupled isolated drive and resistor‐capacitor forced voltage equalization techniques are investigated to increase the blocking voltage of the switches using multiple SiC metal‐oxide‐semiconductor field‐effect transistors (MOSFETs) in series connections. Meanwhile, a special overcurrent protection scheme is designed to improve the reliability of the series‐connected switch. Finally, a high‐voltage solid‐state switch is developed based on the SiC MOSFET series connections, whose output pulse width is adjustable from 20 to 300 μs, frequency is adjustable from 1 Hz to 3 kHz, the maximum output voltage can reach 57 kV (1 Hz), and the overcurrent protection time is about 1 μs.

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Section: Experiments Platformmentioning

confidence: 99%

A novel high‐voltage solid‐state switch based on the SiC MOSFET series and its overcurrent protection

Sun

Liao

et al. 2022

High Voltage

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“…At present, the methods such as the analytic method [4,5], experimental method [6,7] and finite element method [8][9][10] are often used for the research on characteristics of temperature distribution of the reactor. The distribution of the average temperature for the reactor windings can be quickly obtained using calculation formula on the average temperature rise [5].…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, with the great development of modern computer technology and the multi-physical coupling analysis technology, the finite element method based on fluid-temperature coupling is widely used in the temperature-field simulation of the reactor. The characteristics of the temperature distribution for the reactor under fluid-temperature coupling are obtained by the finite element simulation [9,10]. However, the finite element simulation models in these literatures are simplified too much, and the temperature difference is ignored as each encapsulation is constructed without considering the number of the encapsulation layers.…”

Section: Introductionmentioning

confidence: 99%

Temperature Rising Analysis of Dry-type Reactor Based on Multi-physical Coupled-field Method

Wu,

Fan,

Yang

2024

J. Phys.: Conf. Ser.

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To study the temperature-rising characteristics of the windings of the dry-type reactor, a three-dimensional (3D) finite element (FE) simulation model of electromagnetic-fluid-temperature coupling of the reactor is constructed by using the method of the multi-physical field coupled modeling. Firstly, based on the magnetic-circuit coupled theory, the electromagnetic analytical model of the reactor is created and analyzed, and the heat density per unit volume of the reactor is obtained. Then, based on the heat transfer principle of fluid-temperature coupling, taking the heat density per unit volume of the reactor as the heat source, the 3D model of the reactor with fluid-temperature coupling is analyzed by the finite volume method, and the distribution of the internal temperature of the reactor is obtained. From the simulation results of the reactor, the temperature in the upper region is higher than that in the lower region, and the temperature of both sides is lower than that of the middle region. The change regulations of the temperatures in the different encapsulations are basically the same. The temperature gradually increases from the bottom to the top, and the maximum temperature locates at approximately 90% of the axial height of the reactor. The research results provide reference for structure modification, temperature-rising monitoring and overheating fault diagnosis of the reactor.

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“…The conventional methods to generate high-voltage pulses include transmission lines [11], magnetic pulse compression (MPC) [12], linear transformer driver (LTD) [13], and Marx generators [14]. Among them, solid-state Marx generators (SSMGs) using semiconductor switches such as MOSFETs or IGBTs are the most flexible in the adjustment of all parameters of pulses [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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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Study on a Marx generator with high‐voltage silicon‐stacks instead of isolating inductances

Cited by 7 publications

References 12 publications

A novel high‐voltage solid‐state switch based on the SiC MOSFET series and its overcurrent protection

A novel high‐voltage solid‐state switch based on the SiC MOSFET series and its overcurrent protection

Temperature Rising Analysis of Dry-type Reactor Based on Multi-physical Coupled-field Method

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

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