المؤلفون: Katayama, Shinji

مرشدي الرسالة: 片山, 慎治, カタヤマ, シンジ

مصطلحات موضوعية: Power packet, Direct current power system, Network design, Modeling, Buck converter, 500

الوصف: 甲第23902号
工博第4989号
新制||工||1779(附属図書館)
学位規則第4条第1項該当
Doctor of Philosophy (Engineering)
Kyoto University
DFAM

الإتاحة: http://hdl.handle.net/2433/275224Test

المؤلفون: Katayama, Shinji, Hikihara, Takashi

مصطلحات موضوعية: Electrical Engineering and Systems Science - Systems and Control

الوصف: This paper proposes an analytical voltage estimation method for the power packet dispatching network. A unit power packet consists of signals and DC pulsed voltage waveform. In the network, power packets are transmitted among power packet routers (routers) by time-division multiplexing. Routers have capacitors as the storage of power during the power transmission. The power flows depending on the voltage gradient among the storage. The power flow in the network has been studied with numerical approaches. However, the existing studies have considered transmission losses but ignored transient responses. Considering transient responses, the power transmission analysis generally requires circuit simulation and takes considerable time. This paper focuses on a one-to-one connection between routers and underdamped conditions. They allow the estimation of storage voltages considering the transient responses without circuit simulation. First, theoretical analysis and experimental verification are performed on the conditions. Then, an analytical voltage estimation method is proposed by expanding the analysis of the one-to-one connection to the network. Comparison with circuit simulation reveals that the estimation method is accurate enough to analyze power transmission in the network.
Comment: This paper was submitted to Nonlinear Theory and Its Applications, IEICE on December 28, 2021

الوصول الحر: http://arxiv.org/abs/2112.14031Test

المؤلفون: 片山, 慎治, Katayama, Shinji

وصف الملف: application/pdf

الوصول الحر: https://ndlsearch.ndl.go.jp/books/R100000039-I12317070Test

Degree: 博士(工学) -- 京都大学

مستخلص: A method for manufacturing a high frequency cable that includes covering a central conductor made from aluminum or an aluminum alloy with a covering layer made from copper; and wire drawing of the central conductor covered by the covering layer using dies at multiple steps, each of the dies having a cross-section reduction rate of 20% to 29% with an entire reduction angle of 16 degrees, to form a fiber-like structure in a longitudinal direction in the covering layer, and to form an intermetallic compound layer having greater volume resistivity than the covering layer between the central conductor and the covering layer.

المؤلفون: Katayama, Shinji

المساهمون: 引原, 隆士, 土居, 伸二, 中村, 武恒

مصطلحات موضوعية: Buck converter, Modeling, Power packet, Direct current power system, Network design

الوصف: 付記する学位プログラム名: 京都大学卓越大学院プログラム「先端光・電子デバイス創成学」

وصف الملف: application/pdf

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=jairo_______::e4394ab1fadecc5328c6569895cf1db1Test
http://hdl.handle.net/2433/275224Test

مستخلص: A high frequency cable includes: a central conductor made from aluminum or an aluminum alloy; a covering layer made from copper covering the central conductor, and having a fiber-like structure in a longitudinal direction; and an intermetallic compound layer formed between the central conductor and the covering layer and having greater volume resistivity than the covering layer, wherein a cross-sectional area of the covering layer is 15% or less of an entire cross-sectional area including the central conductor, the intermetallic compound layer and the covering layer.

المؤلفون: Katayama, Shinji, Hikihara, Takashi

المصدر: 2020 IEEE International Symposium on Circuits and Systems (ISCAS)

الإتاحة: https://doi.org/10.1109/iscas45731.2020.9180602Test
http://xplorestaging.ieee.org/ielx7/9179985/9180369/09180602.pdf?arnumber=9180602Test

المؤلفون: Katayama, Shinji, Hikihara, Takashi

المساهمون: 片山, 慎治, 引原, 隆士, 70198985

مصطلحات موضوعية: Power packet, power packet router, direct current power system

الوصف: This brief proposes a power packet router (router) and experimentally verifies its operation. A power packet is a unit of DC power and an information tag. When the tag is attached to the power directly, a power packet ensures their simultaneity during the transmission. The router sends and receives power packets in Time Division Multiplexing scheme. Since the beginning of our research project, the router has generated a power packet with a single switch. The switch ensures the simultaneity of power and information during transmission. On the other hand, the switch limits the capacities of power and information of a power packet. The proposed router ensures the simultaneity by its power packet generation method. It lets the switches operate in sync for power and information to generate a single power packet. The operation is experimentally verified. The results make it confirmed the possibility to combine the individually optimized subunits for packet generation.

وصف الملف: application/pdf

العلاقة: http://hdl.handle.net/2433/259819Test; IEEE Transactions on Circuits and Systems II: Express Briefs; 67; 12; 3242; 3246

الإتاحة: http://hdl.handle.net/2433/259819Test

مستخلص: In a gas diffusion electrode assembly, and in an electrolyzer using the same, a bonding piece having on at least one surface a perfluorosulfonic acid layer, a perfluorosulfonyl fluoride layer or an alkyl ester of perfluorocarboxylic acid layer is positioned at its perfluoro compound layer surface with respect to the gas diffusion electrode assembly. Adjacent gas diffusion electrodes are heat fusion bonded together, or heat fusion bonding is carried out using the bonding piece in a frame form. Adjacent gas diffusion electrodes are sealed up by heat fusion bonding, using a material that is similar to the material that forms the gas diffusion electrodes.

مستخلص: In a gas diffusion electrode assembly, and in an electrolyzer using the same, a bonding piece having on at least one surface a perfluorosulfonic acid layer, a perfluorosulfonyl fluoride layer or an alkyl ester of perfluorocarboxylic acid layer is positioned at its perfluoro compound layer surface with respect to the gas diffusion electrode assembly. Adjacent gas diffusion electrodes are heat fusion bonded together, or heat fusion bonding is carried out using the bonding piece in a frame form. Adjacent gas diffusion electrodes are sealed up by heat fusion bonding, using a material that is similar to the material that forms the gas diffusion electrodes.