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Your search keyword '"Kusaka, Keisuke"' showing total 151 results
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151 results on '"Kusaka, Keisuke"'

7. 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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14. Three‐phase wireless power supply system using a matrix converter.

Author

Yamanokuchi, Koki, Kusaka, Keisuke, and Itoh, Jun‐Ichi

Subjects
*MATRIX converters, *WIRELESS power transmission, *DC-to-DC converters
Abstract

This paper proposes a three‐phase wireless power transfer (WPT) system with a three‐phase‐to‐three‐phase matrix converter. The proposed system directly converts power from an AC grid to high‐frequency AC for WPT. The three‐phase WPT system with the matrix converter is effectively expands the lifetime of the WPT system. A novel hybrid commutation method, which is suitable for the WPT system with a resonant characteristic, is proposed to avoid the commutation failure of the matrix converter. The strategy of the proposed hybrid commutation is based on an estimation of the current direction considering the resonant characteristics and elimination of commutation in the critical area. The proposed commutation method achieves an AC input‐current total harmonic distortion (THD) of 4.7% with the resonant three‐phase load without a current sensor on the high‐frequency side. Furthermore, the proposed WPT system achieves a system efficiency of 88.2% at a load of 4 kW. [ABSTRACT FROM AUTHOR]

Published
2023
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