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All Technical Committee Conferences (All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| EE | 2018-01-30 09:30 |
Oita | Satellite Campus Oita | Half-Bridge DC-DC Converter Formulation Under Asymmetrical Control Daiki Yaginuma, Kyohei Yamada, Hikaru Kitaoka, Takashi Ohira (Toyohashi Univ. of Tech.)  EE2017-65 |
In this paper, an asymmetrical control scheme is considered to regulate the output voltage of a half-bridge DC-DC conver... [more] | EE2017-65 pp.133-138 |
| MW | 2017-12-20 13:20 |
Tokyo | Maximization of power transmission efficiency of coupler considering element loss in impedance matching circuit Ryoichi Baba, Kyohei Yamada, Naoki Sakai, Takashi Ohira (TUT) MW2017-159 |
In wireless power transmission systems, transmission efficiency is one of important parameters. Therefore, improvement o... [more] | MW2017-159 pp.101-105 |
|
| MW | 2017-12-20 14:10 |
Tokyo | Design Theory of LC-Ladder Matching with Minimum Stored Energy Kyohei Yamada, Takashi Ohira (TUT) MW2017-161 |
A design theory of an LC ladder which transforms a positive real impedance to another with minimum stored energy is prop... [more] | MW2017-161 pp.113-116 |
|
| MW | 2017-11-10 10:40 |
Okinawa | Miyakojima Marin Terminal Bldg. | Topology maps for power dissipation minimization in LC matching circuits Naoki Sakai, Kyohei Yamada, Takashi Ohira (Toyohashi Univ. of Tech.) MW2017-131 |
Power dissipation in LC matching circuits is one problem for wireless high-power transfer system. This paper presents ... [more] |
MW2017-131 pp.105-110 |
| EE, WPT, IEE-SPC [detail] | 2017-07-27 09:30 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | [Invited Lecture]
6.78-MHz Current Doubler Rectifier with High-Q Inductor Kyohei Yamada (TUT) EE2017-10 WPT2017-15 |
This technical report talks about prototyping of a 6.78-MHz current doubler rectifier in which an inductor with high unl... [more] | EE2017-10 WPT2017-15 pp.1-4 |
| EE, WPT, IEE-SPC [detail] | 2017-07-28 10:55 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | [Invited Lecture]
2.4-GHz High-Impedance Rectifier Kyohei Yamada (TUT) EE2017-25 WPT2017-30 |
I report design and fabrication process of a 2.4-GHz high-impedance rectifier which competed in Radio Frequency Rectifie... [more] | EE2017-25 WPT2017-30 pp.89-92 |
| HPB (2nd) |
2017-02-22 11:25 |
Tokyo | Activity Estimation for People Working in Office using Power and Vibration Sensors Kyohei Yamada, Ryota Tsubakitani (NITT), Ryushi Kimura (NITK), Hideyuki Kobayashi (NITS), Shinichiro Mito (NITT) |
In this study, we attempted to estimate people's position and behavior using wireless power sensors and vibration sensor... [more] | ||
| MW | 2016-12-16 14:30 |
Kanagawa | National Defense Academy | How to Find N of N-way Resistance Compression Network That Makes Input-Resistance Variation within Specified Value Kyohei Yamada, Shinji Abe, Takashi Ohira (Toyohashi Univ. Tech.) MW2016-165 |
[more] | MW2016-165 pp.189-194 |
| MW | 2016-12-16 16:00 |
Kanagawa | National Defense Academy | Two Topologies of Quarter-Wave-Line Inserted Resistance Compression Rectifier
-- Shunt-Shunt Topology and Series-Series Topology -- Shinji Abe, Kyohei Yamada, Naoki Sakai, Takashi Ohira (TUT) MW2016-169 |
In order to supply power active DC load such as motor and battery with wireless power transfer, we proposed quarter-wave... [more] | MW2016-169 pp.211-214 |
| EE, WPT (Joint) |
2016-10-07 09:50 |
Kyoto | Analysis of a Voltage-Doubler-Based Resistance Compression Rectifier
-- Proposal of a novel analysis method by square-wave approximation -- Kyohei Yamada, Yoichiro Miyazaki, Shinji Abe, Naoki Sakai, Takashi Ohira (Toyohashi Univ. Tech.) WPT2016-32 |
[more] | WPT2016-32 pp.73-78 |
|
| MW | 2016-06-23 13:00 |
Gifu | Gifu Univ. | Vector Fields Depicted by Linear Two-Port Circuits on the Smith Chart Kyohei Yamada, Shinji Abe, Naoki Sakai, Takashi Ohira (Toyohashi Univ. Tech.) MW2016-30 |
From the viewpoint of impedance transformation, the characteristic of a linear two-port network is determined by the imp... [more] | MW2016-30 pp.1-5 |
| MBE, NC (Joint) |
2016-03-23 14:45 |
Tokyo | Tamagawa University | Verification of color receptive field of mammals and insects with ICA Ryohei Yamada (Tokyo Tech), Yoichi Seki, Hiroyoshi Miyakawa, Takako Morimoto (Tokyo University of Pharmacy and Life Sciences), Toru Aonishi (Tokyo Tech) NC2015-86 |
It is important to understand how efficiently information from the natural world is processed in the brain. It is sugges... [more] | NC2015-86 pp.95-100 |
| WPT (2nd) |
2015-12-10 11:00 |
Overseas | TamKang University, Tamsui Campus | Sakihara-Moebius Harmonometer to Measure Simultaneous Voltage and Current on Nonlinear Devices and Circuits Masaru Tanaka, Kyohei Yamada, Naoki Sakai, Takashi Ohira (TUT) |
[more] | |
| WPT (2nd) |
2015-12-10 11:20 |
Overseas | TamKang University, Tamsui Campus | Impedance Matching Circuit Optimization for a Miniature EVER System from Hyperbolic Geometry Kyohei Yamada, Naoki Sakai, Takashi Ohira (Toyohashi Univ. Tech.) |
[more] | |
| MW, AP (Joint) |
2015-09-17 10:55 |
Tochigi | Oyama National College of Tech. | New Expression of Loss in LC Circuts Kyohei Yamada, Naoki Sakai, Takashi Ohira (TUT) MW2015-88 |
Two kinds of geometric expressions of losses in a matching circuit are presented using a concept of length or distance. ... [more] | MW2015-88 pp.9-12 |
| EE, WPT, IEE-SPC (Joint) [detail] |
2015-07-06 14:00 |
Kyoto | Hyperbolic-Geometrywise Expression of Power Loss for Impedance Matching Circuits with Shunt/Series Elements by Poincare Metric Kyohei Yamada, Naoki Sakai, Takashi Ohira (TUT) WPT2015-36 |
[more] | WPT2015-36 pp.1-6 |
|
| WPT, MW | 2015-04-17 14:25 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | Power Efficiency Formula for Unit LC Circuit to Match Complex-Impedance Ports
-- Expression Featuring Manhattan Distance and Voronoi Diagram -- Kyohei Yamada, Naoki Sakai, Takashi Ohira (TUT) WPT2015-16 MW2015-16 |
The efficiency of an L-shaped matching circuit consisting of two reactive elements is formulated. The efficiency formula... [more] | WPT2015-16 MW2015-16 pp.81-85 |
| EE, WPT (Joint) |
2014-11-19 11:25 |
Kyoto | Doshisha University | Proposal of High-Voltage Octuple-Current DC-to-DC Converter
-- ZVS-Condition Derivation and 1kV Prototype Design -- Daiya Egashira, Kyohei Yamada, Naoki Sakai, Takashi Ohira (Toyohashi Tech.) EE2014-24 |
In this paper, we propose high-voltage octuple-current DC-to-DC converter. The proposed DC-to-DC converter performs ZVS ... [more] | EE2014-24 pp.31-36 |
| EE, IEE-SPC | 2014-07-10 15:30 |
Hiroshima | Hiroshima Institute of Technology | A Linear Impedance Transformer without Mutual Inductance and Its Minimum Configuration Kyohei Yamada, Takashi Ohira (Toyohashi Univ. Tech.) EE2014-7 |
Magnetic transformers play important roles in electric power conversion equipment. Magnetic trans- formers are mainly em... [more] | EE2014-7 pp.11-16 |
| MW | 2014-06-26 09:30 |
Aichi | Toyohashi Univ. of Tech. | Extended kQ product for two-port LCR networks Naoki Sakai, Kyohei Yamada, Takashi Ohira (Toyohashi Univ. of Tech.) MW2014-43 |
This paper calculates extended $kQ$ product of various 2-port network topologies consisting of lumped-constant resistors... [more] | MW2014-43 pp.7-11 |
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