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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 27  /  [Next]  
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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