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Your search keyword '"Sugai, Taichi"' showing total 130 results
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130 results on '"Sugai, Taichi"'

2. Solid-State Spiker-Sustainer Circuit Consisting of PFN and SOS

Author

He, Yang, Ishiyama, Taisei, Ren, Xiaojing, Nagao, Kazuki, Sugai, Taichi, Kusaka, Keisuke, and Jiang, Weihua

Abstract

Pulsed power with a short high-voltage spike followed by a relatively long plateau is called a spiker-sustainer pulse. It has particular applications in the areas related to gas discharge. This article reports a solid-state spiker-sustainer circuit that consists of a pulse-forming network (PFN) and a semiconductor opening switch (SOS). Two switching units using multiple MOS-gated thyristors are used as control switches that enable charging of the PFN and initiate its discharge to the load through the SOS, respectively. The SOS plays the role of sharpening the pulse front as well as generating a high-voltage spike on top of the near-squarewave output of the PFN. The experimental results have demonstrated the expected circuit behavior and the anticipated output waveforms. The development goal is that this circuit can be used as a module so that much high output power can be generated by using multiple modules connected either in parallel or in series, depending on the user’s requirement.

Published
2024
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22. Solid-State Marx Generator With Sharpening Capacitor.

Author

Ren, Xiaojing, Sugai, Taichi, Tokuchi, Akira, and Jiang, Weihua

Subjects
*METAL oxide semiconductor field-effect transistors, *SWITCHING circuits, *HIGH voltages
Abstract

The effect of sharpening capacitor on the rise time of pulsed power generator has been studied recently, suggesting that a capacitor connected in parallel to the resistive load may help in reducing the rise time of the output. In addition, a bias voltage applied on this capacitor may further reduce the rise time. In this article, a solid-state Marx generator has been used to demonstrate this effect. A ten-module Marx generator circuit using power MOSFETs was used. Experiments were carried out by comparing the output rise time, defined by the time between 10% and 90% of the peak voltage, obtained with and without the sharpening capacitor. With a charging voltage of 800 V, the Marx generates an output of ~7.8 kV on a 40 $\Omega $ load. Using a sharpening capacitor of 520 pF, the rise time is reduced from ~140 to ~120 ns. Furthermore, by applying a bias voltage of −2 kV, the rise time is shortened to ~83 ns, a ~41% reduction from that obtained without the sharpening capacitor. [ABSTRACT FROM AUTHOR]

Published
2022
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