Design of a 10MPa Nanosecond Gas Switch with Adjustable Gap

2014 ◽  
Vol 599-601 ◽  
pp. 643-647
Author(s):  
Bao Feng Cao ◽  
Jiang Bing Fan ◽  
Li Jun Song ◽  
Xin Li ◽  
Peng Li ◽  
...  
Keyword(s):  
Experimental Study ◽  
High Pressure ◽  
High Voltage ◽  
Output Voltage ◽  
Pulse Generator ◽  
Planetary Gear ◽  
Gear Train ◽  
Air Leakage ◽  
Ring Rotation ◽  
Gas Switch

This paper introduces a method to adjust the gap distance of nanosecond gas switch from outside when it is filled with high pressure gas. By using a two-stage planetary gear train and a pinion-and-rack device the gap between the electrodes can be linearly adjusted. The adjusting precision is 0.05 mm and adjustment range is 0 to 10 mm. The sealing of the insulator ring, rotation axle and outside conductors is designed. The performance of the rotation axle is pretty well under 12MPa gas pressure, air leakage not found. Experimental study on switch discharging is carried out by using a high voltage nanosecond pulse generator. The results show the output voltage of the pulse can reach 600kV by adjusting the switch gap. The rise-time of the pulse can be shortened form 3.5ns to 1ns.

A Phenomenological Study of the Steady-State Current Sheet Speed in a Magnetically Driven Shock Tube

1972 ◽  
Vol 27 (6) ◽  
pp. 948-955
Author(s):  
C. T. Chang
Keyword(s):  
Experimental Study ◽  
High Pressure ◽  
Steady State ◽  
Current Sheet ◽  
High Voltage ◽  
Electrode Surface ◽  
Phenomenological Study ◽  
Low Voltage ◽  
Basic Assumptions ◽  
Steady State Current

Abstract The discrepancy between the measured steady-state speed of the current sheet and the theoretically predicted value is examined through a detailed analytical and experimental study of the basic assumptions used in the model. It is found phenomenologicaly that the observed deviation at dis-charge conditions of low voltage and high pressure could be attributed mainly to the spreading of the current-carrying region in time. The deviation occurring at discharge conditions of high voltage and low pressure could be attributed to the possible presence of an ion drag caused by the interaction between the plasma and the electrode surface.

High voltage nanosecond pulse generator based on avalanche transistor Marx bank circuit and linear transformer driver

2021 ◽  
Vol 92 (3) ◽  
pp. 034715
Author(s):  
Zichen Deng ◽  
Qi Yuan ◽  
Saikang Shen ◽  
Jiaqi Yan ◽  
Yanan Wang ◽  
...  
Keyword(s):  
High Voltage ◽  
Pulse Generator ◽  
Nanosecond Pulse ◽  
Linear Transformer Driver

scholarly journals Novel High-Efficiency High Step-Up DC–DC Converter with Soft Switching and Low Component Voltage Stress for Photovoltaic System

Processes ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 1112
Author(s):  
Yu-En Wu ◽  
Jyun-Wei Wang
Keyword(s):  
High Voltage ◽  
Output Voltage ◽  
High Efficiency ◽  
Low Voltage ◽  
Leakage Inductance ◽  
Power Switch ◽  
Half Wave Voltage ◽  
Half Wave ◽  
Voltage Stress ◽  
Voltage Doubler

This study developed a novel, high-efficiency, high step-up DC–DC converter for photovoltaic (PV) systems. The converter can step-up the low output voltage of PV modules to the voltage level of the inverter and is used to feed into the grid. The converter can achieve a high step-up voltage through its architecture consisting of a three-winding coupled inductor common iron core on the low-voltage side and a half-wave voltage doubler circuit on the high-voltage side. The leakage inductance energy generated by the coupling inductor during the conversion process can be recovered by the capacitor on the low-voltage side to reduce the voltage surge on the power switch, which gives the power switch of the circuit a soft-switching effect. In addition, the half-wave voltage doubler circuit on the high-voltage side can recover the leakage inductance energy of the tertiary side and increase the output voltage. The advantages of the circuit are low loss, high efficiency, high conversion ratio, and low component voltage stress. Finally, a 500-W high step-up converter was experimentally tested to verify the feasibility and practicability of the proposed architecture. The results revealed that the highest efficiency of the circuit is 98%.

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