KINDAI UNIVERSITY


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SUGAHARA Kengo

Profile

FacultyDepartment of Electric and Electronic Engineering / Graduate School of Science and Engineering Research
PositionAssociate Professor
Degree
Commentator Guidehttps://www.kindai.ac.jp/meikan/1229-sugahara-kengo.html
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Last Updated :2020/04/03

Education and Career

Education

  •   1995 04  - 1999 03 , Keio University, Science and technology
  •   1999 04  - 2001 03 , Kyoto University
  •   2007 09  - 2007 09 , Hosei University, Graduate School

Academic & Professional Experience

  •   2019 04 ,  - 現在, Kindai University
  •   2014 04 ,  - 2019 03 , Faculty of Science and Engineering, Department of Electric and Electronic Engineering, Kindai University
  •   2001 04 ,  - 2014 03 , Mitsubishi Electric Corporation

Research Activities

Research Areas

  • Natural sciences, Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics, Accelerator Physics
  • Informatics, Computational science, Electromagnetic analysis

Research Interests

  • Accelerator Physics, Electromagnetic Analysis

Published Papers

  • Matrix Formulation of the Cauer Ladder Network Method for Efficient Eddy-Current Analysis, Tetsuji Matsuo, Akihisa Kameari, Kengo Sugahara, Yuji Shindo, IEEE Transactions on Magnetics, IEEE Transactions on Magnetics, 54(11), Jun. 13 2018 , Refereed
    Summary:IEEE A matrix formulation of the Cauer ladder network (CLN) method is derived using the finite-element method to clarify the mathematical aspects of the CLN method. The CLN method directly yields orthogonal expansions of electric and magnetic fields that ensure the equivalence of the Cauer network to the eddy-current field. The CLN method is as exact as the Padé approximation via the Lanczos (PVL) process but more efficiently provides the circuit parameters and the orthogonal expansion than the PVL.
  • Finite-Element Analysis of Unbounded Eddy-Current Problems Using Cauer Ladder Network Method, K. Sugahara, A. Kameari, H. Ebrahimi, Y. Shindo, T. Matsuo, IEEE Transactions on Magnetics, IEEE Transactions on Magnetics, 54, Mar. 01 2018
    Summary:© 1965-2012 IEEE. In this paper, open boundary techniques are employed to represent the Cauer ladder network (CLN) for unbounded eddy-current problems. Recently, a novel and effective model order reduction method, called the CLN method, has been proposed in which linear eddy-current fields are represented by a CLN. The CLN method was initially formulated for closed domain eddy-current problems. This paper demonstrates that the CLN method can be extended to unbounded-domain problems when combined with conventional open boundary techniques. The CLN network parameter extractions of two parallel busbars are demonstrated as a numerical example.
  • Cauer Ladder Network Representation of Eddy-Current Fields for Model Order Reduction Using Finite-Element Method, A. Kameari, H. Ebrahimi, K. Sugahara, Y. Shindo, T. Matsuo, IEEE Transactions on Magnetics, IEEE Transactions on Magnetics, 54, Mar. 01 2018
    Summary:© 2017 IEEE. A novel model order reduction method for efficient analysis of linear eddy-current problems is proposed in which the quasi-static electromagnetic fields are expressed by a weighted sum of a sequence of static electric- A nd magnetic-field modes. The modes are calculated sequentially by static electric and static magnetic computations using the conventional finite-element method, and the time-dependent weights are the voltages and currents of an equivalent Cauer ladder network of the problem. In this paper, the formulation of the method and a numerical test problem are presented, and the accuracy and enormous efficiency of the method are demonstrated by solving a 3-D nonlinear inductor model with a voltage excitation by a dc-dc converter, linearized around the dc current using frozen differential permeability.
  • Dynamical model of an electromagnet using cauer ladder network representation of eddy-current fields, Yuji Shindo, Kengo Sugahara, Akihisa Kameari, Tetsuji Matsuo, IEEJ Journal of Industry Applications, IEEJ Journal of Industry Applications, 7, 305 - 313, Jan. 01 2018
    Summary:© 2018 The Institute of Electrical Engineers of Japan. This paper presents a novel dynamical modeling method for magnetic actuators. The magnetic field is decomposed into orthogonal distribution functions by using the Cauer ladder network representation of eddy-current fields. The linearized transfer function of the magnetic force is derived by using the Maxwell's stress tensor and distribution functions. The numerical example of an electromagnet is presented to show the effectiveness of this method. It is revealed that the eddy current not only reduces the main flux but also induces a repulsive force at the air gap. The details of the Cauer ladder network representations are also clarified.
  • Strategic Dual Image Method for Non-Axisymmetric Three-dimensional Magnetic Field Problems., Kengo Sugahara, IEICE Transactions, IEICE Transactions, 101-C(1), 52 - 55, Jan. 2018 , Refereed
  • Dynamical Model of an Electromagnet by Cauer Ladder Network Representation of Eddy-Current Fields, 2017 11TH INTERNATIONAL SYMPOSIUM ON LINEAR DRIVES FOR INDUSTRY APPLICATIONS (LDIA), 2017 11TH INTERNATIONAL SYMPOSIUM ON LINEAR DRIVES FOR INDUSTRY APPLICATIONS (LDIA), 2017 , Refereed
  • Strategic Dual Image Method for Three-dimensional Magnetic Field Problems, 2016 IEEE CONFERENCE ON ELECTROMAGNETIC FIELD COMPUTATION (CEFC), 2016 IEEE CONFERENCE ON ELECTROMAGNETIC FIELD COMPUTATION (CEFC), 2016 , Refereed
  • Perturbation approach for open boundary problems based on the equivalence theorem, Kengo Sugahara, PIERS 2016, PIERS 2016, 2478 - 2483, 2016 , Refereed
  • Electromagnetic analysis of wireless power transfer system with Improvised Absorbing Boundary Conditions, Kengo Sugahara, PIERS 2016, PIERS 2016, 1152 - 1155, 2016 , Refereed
  • Periodic Image Method for Open Boundary Axisymmetrical Magnetic Field Problems, SUGAHARA KENGO, IEEE Trans Magn, IEEE Trans Magn, 49(11), 5399 - 5403, Nov. 2013 , Refereed
  • Generalized Strategic Dual Image Method for Open Boundary Axisymmetrical Magnetic Field Problems, SUGAHARA KENGO, IEEE Trans Magn, IEEE Trans Magn, 49(9), 4944 - 4950, Sep. 2013 , Refereed
  • Generalized Electrical Image Method for Field Reconstruction, SUGAHARA KENGO, IEEE Trans Appl Supercond, IEEE Trans Appl Supercond, 22(4), 1 - 7, Aug. 2012 , Refereed
  • Reduction of Return Current Noise Using Double-Series Resonant Filter, AZUMA SATOSHI, ITO DAISUKE, SUGAHARA KENGO, 電気学会論文誌 D, 電気学会論文誌 D, 129(4), 399-405 (J-STAGE) - 405, Apr. 01 2009
    Summary:A novel double-series resonant filter is implemented in order to reduce the high-frequency return current noise generated by AC-powered electric cars with AC/DC PWM converters and inverters. The double-series resonant filter is placed between a main transformer and a converter. The resonant filter is tuned so that the noise signal due to the return current is attenuated at the exact noise frequency; for example, the 105-kHz component of an ATS (Automatic Train Stop) signal is attenuated by this filter. The filter has two LCR resonant circuits, one of which is in parallel with a resistance. This filter design helps achieve good attenuation at the noise frequency and helps limit unnecessary amplification at other frequencies. First, a test filter is realized, and the inductance and capacitance of this filter are in good agreement with the corresponding values in the filter design. Then, the filter is included in a full-scale test system with a main transformer and a converter. Then it is confirmed that a 5-dB reduction in the return current noise is achieved by using the proposed filter. Finally, the return current noise in the test system is confirmed to be well below the desired regulation level. This is expected to help realize simple methods for dealing with the effects of impedance at high frequencies in the main transformer.
  • Investigation of a Boundary Integral Equation n*H=Js on Torus-Shaped Perfect Conductors, SUGAHARA KENGO, IEEE Trans Antennas Propag, IEEE Trans Antennas Propag, 56(3), 722 - 727, Mar. 2008 , Refereed
  • 二重直列共振フィルタによる交流車両の高周波帰線電流ノイズ低減, AZUMA SATOSHI, ITO DAISUKE, SUGAHARA KENGO, 電気学会産業応用部門大会講演論文集, 電気学会産業応用部門大会講演論文集, 2007(3), III.247-III.252, Aug. 20 2007
  • Numerical Analysis of Near-Field Magnetic Field for Automobile Electronic Key Systems, SUGAHARA KENGO, YAMAMOTO HIROAKI, OUCHI HIROFUMI, NAKANO YUJI, IEEE Trans Magn, IEEE Trans Magn, 43(8), 3375 - 3379, Aug. 2007 , Refereed
  • Equivalent circuit analysis for vias in multilayered printed circuit boards by optimization method, Shiraki Yasuhiro, Sugahara Kengo, Murata Yuichiro, Nishi Shinya, ELECTRONICS AND COMMUNICATIONS IN JAPAN PART II-ELECTRONICS, ELECTRONICS AND COMMUNICATIONS IN JAPAN PART II-ELECTRONICS, 90(9), 1 - 10, 2007 , Refereed
  • Numerical Analysis of Low-Frequency Electromagnetic Scattering From Three-Dimensional Arbitrarily Shaped Conducting Bodies Using an Inductance Matrix, SUGAHARA KENGO, YODA KIYOSHI, IEEE Trans Antennas Propag, IEEE Trans Antennas Propag, 54(12), 3833 - 3839, Dec. 2006 , Refereed
  • Equivalent Circuit Analysis for Vias in Multilayered Printed Circuit Boards by Optimization Method, SHIRAKI YASUHIRO, SUGAHARA KENGO, MURATA YUICHIRO, NISHI SHIN'YA, 電子情報通信学会論文誌 C, 電子情報通信学会論文誌 C, J89-C(12), 1110 - 1119, Dec. 01 2006
    Summary:本論文では,多層プリント回路基板の層問を接続するビアの伝送特性を計算できる高精度な等価回路を構築し,伝送特性に影響するビアの諸因子を検討した.本等価回路はビアの物理構造に基づいており,その等価回路定数は最適化手法により決定した.本等価回路を10層以上のプリント回路基板のビアに適用して,周波数がGHz以上の伝送特性について評価した結果をFDTD法と実測により検証し,妥当であることを示した.更に,本等価回路を用いて,ビアの諸因子が伝送特性に及ぼす影響を検討し,数値解析に比べて検討時間を短縮できることを示した.
  • Numerical Analysis of Low-Frequency Electromagnetic Scattering From Axially Symmetric Bodies Using an Inductance Matrix, SUGAHARA KENGO, YODA KIYOSHI, IEEE Trans Magn, IEEE Trans Magn, 42(5), 1555 - 1559, May 2006
  • Frequency-Independent Equivalent Circuit Model for Ferromagnetic RF Integrated Inductors, SUGAHARA KENGO, TANABE SHINJI, YAMAGUCHI MASAHIRO, IEEE Trans Magn, IEEE Trans Magn, 41(10), 3529 - 3531, Oct. 2005
  • EMI Analysis in Automobile at FM Radio Band Using Combination Method, SHIRAKI YASUHIRO, SUGAWARA KENGO, TANABE SHINJI, WATANABE TETSUSHI, NAKAMOTO KATSUYA, 電子情報通信学会論文誌 B, 電子情報通信学会論文誌 B, J88-B(7), 1319 - 1328, Jul. 01 2005
    Summary:自動車では, 車載電子機器(ECU)から発生する不要電磁波放射(EMI)がFMラジオの受信特性に影響を与えるため, 設計段階EMI評価を行うため数値計算が必要である.本論文では給電部の電流測定, 二次元モーメント法, 伝送線路解析法及びFDTD法を組み合わせて連携させた電磁界解析法を用いて, ECUから発生するEMIによる自動車車室内の電磁界分布を明らかにすることにより, 自動車車室内のEMI設計に電磁界解析を適用する方法の検討を行った.このような人体や車室内構造品を考慮した実際の自動車にほぼ等しい条件で, EMI設計に電磁界解析を適用した報告は見当たらない.まず実際の自動車において, 測定ケーブルに不要電流が重畳しない実測方法を用いて, 車室内の電磁界解析結果を検証し, 本連携解析が自動車のEMI解析に有用であることを示した.更に本手法がEMIの影響を受けにくいFMアンテナ位置の最適設計に効果的な手法であることを明らかにした.また, 車体ボディ材質, 人体の有無によりFMアンテナのEMIが異なることを示した.
  • B-6-90 Equivalent Circuit Analysis for Vias in Multilayered Circuit Board, Shirakii Yasuhiro, Sugahara Kengo, Murata Yuichiro, Nishi Shinya, Proceedings of the IEICE General Conference, Proceedings of the IEICE General Conference, 2004(2), Mar. 08 2004

Conference Activities & Talks

  • A basic study of model order reduction of induction motor using CLN method, 松尾 哲司, 菅原 賢悟, 亀有 昭久, 進藤 裕司, 電気学会研究会資料. SA,   2019 03 06
  • Measurement Method Theory of Resistivity of the Semi-conductive Layers for XLPE Cables Based on Conformal Mapping Theory : Arrangements of Measurement Electrodes on Long cable Core and their Verification by the Electromagnetic Analysis, 渡辺 和夫, 菅原 賢悟, 電気学会研究会資料. SA,   2019 03 06
  • Combination of integral equation and FEM using TSVD, 菅原 賢悟, 電気学会研究会資料. SA,   2019 03 06
  • 3D Field Sensing System and Non-Destructive Magnetization Distribution Evaluation with Truncated Singular Value Decomposition, 原頭 京壱, 菅原 賢悟, 近藤 康, 矢野 博幸, 電気学会研究会資料. SA,   2019 03 06
  • Magnetic Moment Method with the Idea of Magnetic Surface Charge Method, 矢野 博幸, 菅原 賢悟, 電気学会研究会資料. SA,   2019 03 06
  • A basic study of model order reduction of induction motor using CLN method, 松尾 哲司, 菅原 賢悟, 亀有 昭久, 進藤 裕司, 電気学会研究会資料. RM,   2019 03 06
  • Measurement Method Theory of Resistivity of the Semi-conductive Layers for XLPE Cables Based on Conformal Mapping Theory : Arrangements of Measurement Electrodes on Long cable Core and their Verification by the Electromagnetic Analysis, 渡辺 和夫, 菅原 賢悟, 電気学会研究会資料. RM,   2019 03 06
  • Combination of integral equation and FEM using TSVD, 菅原 賢悟, 電気学会研究会資料. RM,   2019 03 06
  • 3D Field Sensing System and Non-Destructive Magnetization Distribution Evaluation with Truncated Singular Value Decomposition, 原頭 京壱, 菅原 賢悟, 近藤 康, 矢野 博幸, 電気学会研究会資料. RM,   2019 03 06
  • Magnetic Moment Method with the Idea of Magnetic Surface Charge Method, 矢野 博幸, 菅原 賢悟, 電気学会研究会資料. RM,   2019 03 06
  • Comparison of ELF/MAGIC and Magnetic Moment Method, 菅原 賢悟, 矢野 博幸, 電気学会研究会資料. MAG = The papers of technical meeting on magnetics, IEE Japan,   2019 02 22
  • 3D Field Sensing System and Non-Destructive Magnetization Distribution Evaluation with Truncated Singular Value Decomposition, 原頭 京壱, 菅原 賢悟, 近藤 康, 矢野 博幸, 電気学会研究会資料. MAG = The papers of technical meeting on magnetics, IEE Japan,   2019 02 22
  • Reduction of AM Radio Noise of a VVVF Inverter for an Electric Railway Car and a Simulation Model of Noise Current, Azuma Satoshi, Itoh Daisuke, Ishida Takahito, Iwata Akihiko, Sugahara Kengo, Morimoto Shigeo, IEEJ Transactions on Industry Applications,   2019
    Summary:

    This paper proposes countermeasures to reduce radiated AM radio frequency noise caused by the VVVF (variable-voltage/variable-frequency) inverter system incorporated with an electric railway car. First, the common-mode current flowing through a cooling fin earth line is studied, and the connection change of the line shows good attenuation of the 1.26MHz resonance component. Second, the common-mode current flowing though the motor earth line with a capacitor is focused upon, and the modified connections of the line to the outside of the input common-mode core achieves fine noise reduction in the range from 500kHz to 1.5MHz. In such cases, the existing input common-mode core is utilized to establish the impedance, which is efficient in both the noise reduction and the countermeasure cost reduction. Finally, a current simulation model which is paid attention to the AM radio frequency range is examined with the measured impedance data of the VVVF inverter system. The currents flowing thorough the cooling fin earth line and the motor earth line is simulated, and these simulated currents show good agreement with the measured one.

  • A Study of CLN Method Taking Account of Expansion Points (part 2), 栗山健太, 亀有昭久, 菅原賢悟, 進藤裕司, 松尾哲司, 電気学会研究会資料,   2018 08 21
  • Electromagnetic analysis of accelerator magnet using 2D-1D FEM, 菅原賢悟, 阿波根明, 不破康裕, 沖英史, 栗山靖敏, 上杉智教, 石禎浩, 電気学会研究会資料,   2018 08 21
  • Software Benchmarking of the Magnetic Field Analysis in the Accelerator Magnets, 増田吉昭, 保富立樹, 菅原賢悟, 沖田英史, 不破康裕, 上杉智教, 栗山靖敏, 石禎浩, 電気学会研究会資料,   2018 08 21
  • Multiport analysis of CLN with Coupling between Conductors., 菅原賢悟, 松尾哲司, 進藤裕司, 亀有昭久, 電気学会研究会資料,   2018 08 21
  • Multiport analysis of CLN with Coupling between Conductors, 菅原 賢悟, 松尾 哲司, 進藤 裕司, 亀有 昭久, 電気学会研究会資料. RM,   2018 08 21
  • A Study of CLN Method Taking Account of Expansion Points(part2), 栗山 健太, 亀有 昭久, 菅原 賢悟, 進藤 裕司, 松尾 哲司, 電気学会研究会資料. RM,   2018 08 21
  • Electromagnetic analysis of accelerator magnet using 2D-1D FEM, 菅原 賢悟, 阿波根 明, 不破 康裕, 沖田 英史, 栗山 靖敏, 上杉 智教, 石 禎浩, 電気学会研究会資料. RM,   2018 08 21
  • Software Benchmarking of the Magnetic Field Analysis in the Accelerator Magnets, 増田 吉昭, 保富 立樹, 菅原 賢悟, 沖田 英史, 不破 康裕, 上杉 智教, 栗山 靖敏, 石 禎浩, 電気学会研究会資料. RM,   2018 08 21
  • Shimming of ferrite magnets for tabletop NMR equipment, 日比野 良彦, 菅原 賢悟, 近藤 康, 室 洋一, 田中 宏和, 佐藤 利行, 電気学会研究会資料. MAG = The papers of technical meeting on magnetics, IEE Japan,   2018 07 20
  • Kameari法による渦電流場の解析, 菅原賢悟, 電気学会研究会資料,   2018 07 19
  • Shimming of ferrite magnets for tabletop NMR equipment, 日比野良彦, 菅原賢悟, 近藤康, 室洋一, 田中宏和, 佐藤利行, 電気学会研究会資料,   2018 07 19
  • 学生実験用NMR装置の開発, 近藤康, 日比野良彦, 菅原賢悟, 室洋一, 田中宏和, 佐藤利行, 京都大学物性科学センター誌,   2018 06
  • In Gauss rifle using high speed imaging Evaluation of mechanical energy, 日比野良彦, 溝淵祐也, 菅原賢悟, 高野保英, 電気学会研究会資料,   2018 03 09
  • Magnetization reconstruction of ferrite magnets based on the SVD, 菅原賢悟, 日比野良彦, 近藤康, 矢野博幸, 電気学会研究会資料,   2018 03 08
  • 学生実験用NMR装置の開発, 近藤康, 日比野良彦, 菅原賢悟, 室洋一, 田中宏和, 佐藤利行, 応用物理学会春季学術講演会講演予稿集(CD-ROM),   2018 03 05
  • 微分・位相幾何学的考え方を用いたCVケーブル半導電層の抵抗率測定方法の理論~一つの応用例~, 渡辺和夫, 菅原賢悟, 電気学会全国大会講演論文集(CD-ROM),   2018 03 05
  • 行列連分数を用いた2ポートCLN法に関する検討, 藤原嵩之, 栗山健太, 菅原賢悟, 亀有昭久, 徳増正, 進藤裕司, 松尾哲司, 電気学会全国大会講演論文集(CD-ROM),   2018 03 05
  • 展開点付きCLN法に関する検討, 栗山健太, 藤原嵩之, 亀有昭久, 菅原賢悟, 進藤裕司, 松尾哲司, 電気学会全国大会講演論文集(CD-ROM),   2018 03 05
  • Development of an eddy current magnetic levitation system with revolving permanent magnets, 日比野 良彦, 後藤 夏樹, 菅原 賢悟, 電気学会研究会資料. SA,   2018 01 24
  • Development of an eddy current magnetic levitation system with revolving permanent magnets, 日比野 良彦, 後藤 夏樹, 菅原 賢悟, 電気学会研究会資料. RM,   2018 01 24
  • Development of an eddy current magnetic levitation system with revolving permanent magnets, 日比野良彦, 後藤夏樹, 菅原賢悟, 電気学会研究会資料,   2018 01 23
  • A study of two-port CLN method based on admittance and impedance matrices, 藤原 嵩之, 栗山 健太, 菅原 賢悟, 亀有 昭久, 徳増 正, 進藤 裕司, 松尾 哲司, 電気学会研究会資料. SA,   2018 01 23
  • A Study of CLN Method Taking Account of Expansion Points, 栗山 健太, 藤原 嵩之, 亀有 昭久, 菅原 賢悟, 進藤 裕司, 松尾 哲司, 電気学会研究会資料. SA,   2018 01 23
  • Measurement Method Theory of Resistivity of the Semi-conductive Layers for the Electric Power Cable Based on Differential Topological Theory : A Verification of the Theory by the Electromagnetic Analysis, 渡辺 和夫, 菅原 賢悟, 電気学会研究会資料. SA,   2018 01 23
  • Violation of the law of conversation of energy in Gauss rifle, 日比野 良彦, 菅原 賢悟, 高野 保英, 電気学会研究会資料. SA,   2018 01 23
  • Magnetization reconstruction of ferrite magnets based on the SVD, 菅原 賢悟, 黒川 卓杜, 日比野 良彦, 近藤 康, 矢野 博幸, 電気学会研究会資料. SA,   2018 01 23
  • Chemical-Shift-Resolution-Tabletop NMR System with Ferrite Magnets, 日比野 良彦, 菅原 賢悟, 近藤 康, 電気学会研究会資料. SA,   2018 01 23
  • A study of two-port CLN method based on admittance and impedance matrices, 藤原 嵩之, 栗山 健太, 菅原 賢悟, 亀有 昭久, 徳増 正, 進藤 裕司, 松尾 哲司, 電気学会研究会資料. RM,   2018 01 23
  • A Study of CLN Method Taking Account of Expansion Points, 栗山 健太, 藤原 嵩之, 亀有 昭久, 菅原 賢悟, 進藤 裕司, 松尾 哲司, 電気学会研究会資料. RM,   2018 01 23
  • Measurement Method Theory of Resistivity of the Semi-conductive Layers for the Electric Power Cable Based on Differential Topological Theory : A Verification of the Theory by the Electromagnetic Analysis, 渡辺 和夫, 菅原 賢悟, 電気学会研究会資料. RM,   2018 01 23
  • Violation of the law of conversation of energy in Gauss rifle, 日比野 良彦, 菅原 賢悟, 高野 保英, 電気学会研究会資料. RM,   2018 01 23
  • Magnetization reconstruction of ferrite magnets based on the SVD, 菅原 賢悟, 黒川 卓杜, 日比野 良彦, 近藤 康, 矢野 博幸, 電気学会研究会資料. RM,   2018 01 23
  • Chemical-Shift-Resolution-Tabletop NMR System with Ferrite Magnets, 日比野 良彦, 菅原 賢悟, 近藤 康, 電気学会研究会資料. RM,   2018 01 23
  • Recent Advances in Wireless Power Transfer on Power-magnetics, Doi Tatsuya, Hosotani Tatsuya, Sugahara Kengo, IEEJ Transactions on Fundamentals and Materials,   2018
    Summary:

    Recently, technologies of wireless power transfer (WPT) using magnetic field resonance coupling have been studied and developed for consumer electrical appliances, and charging systems of electric vehicles, among other applications. This paper reports on recent advances and applications in wireless power transfer on power-magnetics. First, advanced technologies of direct-current (DC)-resonance WPT which has an ability of generating electromagnetic field resonance from DC power source using switching power conversion circuit are described. Second, recent advances in electromagnetic field analysis for WPT are described. Finally, advanced technologies of optimum design and the layouts of transmitting and receiving coils are introduced.

  • 複数電源に対応したCLN法―開領域問題への拡張―, 菅原賢悟, 亀有昭久, 進藤裕司, 徳増正, 松尾哲司, 電子情報通信学会技術研究報告,   2017 11 02
  • Wireless Power Transfer Leakage magnetic flux Electromagnetic analysis, 菅原賢悟, 山本輝, 電気学会マグネティックス研究会資料,   2017 10 18
  • Dynamical Model of an Electromagnet by Cauer Ladder Network Representation of Eddy-Current Fields, 進藤裕司, 亀有昭久, 菅原賢悟, 松尾哲司, 電気学会静止器研究会資料,   2017 09 21
  • CLN method with Multiple Power Supplies, 菅原賢悟, 亀有昭久, 進藤裕司, 徳増正, 松尾哲司, 電気学会静止器研究会資料,   2017 09 21
  • CLN method with Multiple Power Supplies, 菅原賢悟, 亀有昭久, 進藤裕司, 徳増正, 松尾哲司, 電気学会静止器研究会資料,   2017 09 21
  • Revolving Permanent Magnet Type Magnetic Levitation, 太田 亮輔, 菅原 賢悟, 電気学会研究会資料. RM,   2017 01 19
  • Cauer Realizations for Quasi-Static Electromagnetic Fields, 亀有 昭久, 菅原 賢悟, 松尾 哲司, 平瀬 祐子, 進藤 裕司, 電気学会研究会資料. RM,   2017 01 19
  • Strategic Dual Image Method assisted by Perturbation Correction, 菅原 賢悟, 電気学会研究会資料. RM,   2017 01 19
  • Revolving Permanent Magnet Type Magnetic Levitation, 太田 亮輔, 菅原 賢悟, 電気学会研究会資料. SA,   2017 01 19
  • Cauer Realizations for Quasi-Static Electromagnetic Fields, 亀有 昭久, 菅原 賢悟, 松尾 哲司, 平瀬 祐子, 進藤 裕司, 電気学会研究会資料. SA,   2017 01 19
  • Strategic Dual Image Method assisted by Perturbation Correction, 菅原 賢悟, 電気学会研究会資料. SA,   2017 01 19
  • Cauer Realizations for Quasi-Static Electromagnetic Fields, 亀有昭久, 菅原賢悟, 松尾哲司, 平瀬祐子, 進藤裕司, 電気学会静止器研究会資料,   2017 01 18
  • 等価定理を用いた摂動補正によるStrategic Dual Image法の拡張, 菅原賢悟, 電気学会静止器研究会資料,   2017 01 18
  • Revolving Permanent Magnet Type Magnetic Levitation, 太田亮輔, 菅原賢悟, 電気学会静止器研究会資料,   2017 01 18
  • Improvised asymptotic boundary conditions for quasi-static magnetic-field problems in ellipsoidal domains, Kengo Sugahara, IEEE CEFC 2016 - 17th Biennial Conference on Electromagnetic Field Computation,   2017 01 12
    Summary:© 2016 IEEE. Improvised Asymptotic Boundary Conditions (IABC) in Ellipsoid coordinate have been derived. The IABC is one of the simplest techniques to emulate open boundary condition which can be improvised in virtually any finite-element programs. The IABC was first proposed with the circular domain in 2D, and spherical in axisymmetric and 3D. This work extends the IABC formulation to ellipsoidal domains.
  • Strategic dual image method for three-dimensional magnetic field problems, Kengo Sugahara, IEEE CEFC 2016 - 17th Biennial Conference on Electromagnetic Field Computation,   2017 01 12
    Summary:© 2016 IEEE. Strategic Dual Image method (SDI) for three-dimensional magnetic field problems is studied. The basic idea of the SDI method is that the open boundary solution is in-between the Dirichlet and Neumann solution. In this study, we have shown that the reflected field from the boundary can be minimized when the average weight of the Dirichlet and Neumann solution approaches to w = 2/3.
  • ヒステリシスを考慮した輸送系に用いられる偏向電磁石の磁場測定, 保富立樹, 菅原賢悟, 石禎浩, 栗山靖敏, 上杉智教, 沖田英史, 不破康裕, 日本加速器学会年会(Web),   2017
  • A study on cardiac action potential and the electrical properties of human body using an electromagnetic simulation with the human body, Onda Hiroyuki, Sugawara Kengo, Okada Shima, Transactions of Japanese Society for Medical and Biological Engineering,   2017
    Summary:

    In this study, the relationship between the action potential in vivo and body fat percentage is clarified using an electromagnetic simulation of the human body. In general, it has been considered that there is a negative correlation between body fat percentage and the bioelectric potential observed. However, regarding consideration using the actual human body, systematic consideration was difficult because body fat percentage changes in conjunction with body type. Therefore, by using the electromagnetic simulation while fixing the form of the human body model, we changed only the body fat percentage by substituting the electrical properties of the human tissues, and the relationship between cardiac action potential observed and body fat percentage was investigated. As a result, the body fat percentage dependence of the observed action potential is small, and it became clear that dependence on body type is dominant.

  • Electromagnetic modeling of the wireless power transfer system for finite element analysis in aiming to reduce leakage electromagnetic field, 山本 輝, 菅原 賢悟, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報,   2016 09 07
  • Dependence of the cardiac action potential on the human body structure in the driver drowsiness detection system, 石塚 舜典, 菅原 賢悟, 岡田 志麻, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報,   2016 09 07
  • Dependence of the cardiac action potential on the human body structure in the driver drowsiness detection system, 石塚 舜典, 菅原 賢悟, 岡田 志麻, 電気学会研究会資料. RM,   2016 09 07
  • Electromagnetic modeling of the wireless power transfer system for finite element analysis in aiming to reduce leakage electromagnetic field, 山本 輝, 菅原 賢悟, 電気学会研究会資料. RM,   2016 09 07
  • Dependence of the cardiac action potential on the human body structure in the driver drowsiness detection system, 石塚 舜典, 菅原 賢悟, 岡田 志麻, 電気学会研究会資料. SA,   2016 09 07
  • Electromagnetic modeling of the wireless power transfer system for finite element analysis in aiming to reduce leakage electromagnetic field, 山本 輝, 菅原 賢悟, 電気学会研究会資料. SA,   2016 09 07
  • Electromagnetic modeling of the wireless power transfer system for finite element analysis in aiming to reduce leakage electromagnetic field, 山本輝, 菅原賢悟, 電子情報通信学会技術研究報告,   2016 08 31
  • Dependence of the cardiac action potential on the human body structure in the driver drowsiness detection system, 石塚舜典, 菅原賢悟, 岡田志麻, 電子情報通信学会技術研究報告,   2016 08 31
  • Electromagnetic radiation from WPT system, 菅原賢悟, 電気学会マグネティックス研究会資料,   2016 03 28
  • 21pCC-2 Tabletop NMR equipment for NMR Quantum Computer, Chonlathep K, Sakamoto Y, Sugahara K, Kondo Y, 日本物理学会講演概要集,   2016 03 19
  • Improvised Asymptotic Boundary Conditions, 菅原賢悟, 電気学会静止器研究会資料,   2016 01 20
  • Improvised Asymptotic Boundary Conditions for Quasi-Static Magnetic-Field Problems in Ellipsoidal Domains, 2016 IEEE CONFERENCE ON ELECTROMAGNETIC FIELD COMPUTATION (CEFC),   2016
  • Strategic Dual Image Method for Three-dimensional Magnetic Field Problems, 2016 IEEE CONFERENCE ON ELECTROMAGNETIC FIELD COMPUTATION (CEFC),   2016
  • Improvised absorbing boundary conditions for three-dimensional electromagnetic finite elements, K. Sugahara, Proceedings of the 2015 International Conference on Electromagnetics in Advanced Applications, ICEAA 2015,   2015 10 12
    Summary:© 2015 IEEE. Improvised absorbing boundary conditions for high frequency electromagnetic problems have been studied. This method approximated unbounded space as series of isotropic spherical shells so as to emulate open boundaries without the need for additional code to any finite element solver. Previous work addressed applications of this technique to magnetostatic and electrostatic problems. This present work studies the wide-range frequency dependence of the IABC when applied to three-dimensional electromagnetic radiation problems.
  • Perturbation Method Utilizing Equivalence Theorem, 菅原 賢悟, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報,   2015 09 03
  • Improvised absorbing boundary conditions for three-dimensional electromagnetic finite elements, Kengo Sugahara, Electromagnetics in Advanced Applications (ICEAA), 2015,   2015 09
  • Perturbation Method Utilizing Equivalence Theorem, 菅原賢悟, 電子情報通信学会技術研究報告,   2015 08 27
  • Perturbation method for open boundary problems, 菅原賢悟, 電気学会マグネティックス研究会資料,   2015 08 04
  • Spherical Absorbing Condition, 菅原 賢悟, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報,   2015 05 15
  • Spherical Absorbing Condition, 菅原賢悟, 電子情報通信学会技術研究報告,   2015 05 08
  • Spherical Absorbing Conditions Based on Electrical Images, 菅原 賢悟, 電気学会研究会資料. RM,   2015 03 06
  • Spherical Absorbing Conditions Based on Electrical Images, 菅原 賢悟, 電気学会研究会資料. SA,   2015 03 06
  • Spherical Absorbing Conditions Based on Electical Images, SUGAHARA KENGO, 電気学会静止器研究会資料,   2015 03 05
  • Spherical Absorbing Conditions Based on Electical Images, SUGAHARA KENGO, 電気学会マグネティックス研究会資料,   2014 10 23
  • 先端医療を支える電気設備 8 粒子線治療装置の技術動向, KATAYOSE TADASHI, YAMADA YUKIKO, ODAWARA SHUHEI, SUGAHARA KENGO, MIZUKAMI TOMOHIRO, 電気設備学会誌,   2014 04 10
  • Technical Trend of Particle Beam Treatment System, 片寄 雅, 山田 由希子, 小田原 周平, 菅原 賢悟, 水上 友浩, The Journal of the Institute of Electrical Installation Engineers of Japan,   2014
  • Generalized Strategic Dual Image Method for Axisymmetric Magnetic Problems, SUGAHARA KENGO, 電気学会マグネティックス研究会資料,   2013 03 28
  • Generalized Strategic Dual Image Method for Axisymmetric Magnetic Problems, 菅原 賢悟, 電子情報通信学会技術研究報告 : 信学技報,   2013 01 24
  • Generalized Strategic Dual Image Method for Axisymmetric Magnetic Problems, SUGAHARA KENGO, 電気学会電磁界理論研究会資料,   2013 01 24
  • Generalized Strategic Dual Image Method for Axisymmetric Magnetic Problems, 菅原 賢悟, 電子情報通信学会技術研究報告 : 信学技報,   2013 01 24
  • Generalized Strategic Dual Image Method for Axisymmetric Magnetic Problems, 菅原 賢悟, 電子情報通信学会技術研究報告 : 信学技報,   2013 01 24
  • Generalized Strategic Dual Image Method for Axisymmetric Magnetic Problems, 菅原 賢悟, 電子情報通信学会技術研究報告 : 信学技報,   2013 01 24
  • Generalized Strategic Dual Image Method for Axisymmetric Magnetic Problems, 菅原 賢悟, 電子情報通信学会技術研究報告 : 信学技報,   2013 01 24
  • Magnetic Field Integral Equation on Multiply-Connected Perfect Conducting Body, CHIBA HIDETOSHI, SUGAHARA KENGO, 電気学会電磁界理論研究会資料,   2012 11 15
  • 陽子シンクロトロンのスピルフィードバック制御方法の開発, HARUNA NOBUYUKI, YOSHIDA KATSUHISA, SUGAHARA KENGO, IKEDA MASAHIRO, TANAKA HIROFUMI, 日本加速器学会年会(Web),   2011
  • Investigation of the Inaccuracy of the MFIE on Torus-Shaped Conductors, SUGAHARA KENGO, 電気学会電磁界理論研究会資料,   2008 05 24
  • Analysis of a Scattered Magnetic Field from Thin Conductors Utilizing a combined IEM and EFIE, SUGAHARA KENGO, 電気学会マグネティックス研究会資料,   2008 01 24
  • 鉄道用変電システムにおけるEMC, MASUI TAKESHI, MIYAZAKI CHIHARU, KONEMORI AKIO, SUGAHARA KENGO, 電気学会産業応用部門大会講演論文集,   2005 08 29
  • スマートエントリーシステムにおけるLF,UHF電磁場解析, 依田潔, 菅原賢悟, 白木康博, 田辺信二, 山本博明, 三菱電機技報,   2004 09 25
  • 高速伝送用多層基板におけるビアの等価回路に関する検討, SHIRAKI YASUHIRO, SUGAHARA KENGO, MURATA YUICHIRO, NISHI SHIN'YA, 電子情報通信学会大会講演論文集,   2004 03 08
  • B-6-90 Equivalent Circuit Analysis for Vias in Multilayered Circuit Board, Shirakii Yasuhiro, Sugahara Kengo, Murata Yuichiro, Nishi Shinya, Proceedings of the IEICE General Conference,   2004 03 08
  • High-Precision Equivalent Circuit Analysis of Ferromagnetic RF Integrated Inductors, SUGAWARA KENGO, TANABE SHINJI, YAMAGUCHI MASAHIRO, IKEDA SHINJI, BAE S, KONRAD A, 電気学会マグネティックス研究会資料,   2003 12 18
  • Nonlinearity of an RF integrated ferromagnetic inductor, YAMAGUCHI Masahiro, KURIBARA Takashi, TANABE Shinji, SUGAWARA Kengo, 日本応用磁気学会学術講演概要集 = Digest of ... annual conference on magnetics in Japan,   2003 09 01
  • Stacked .PI.-type Equivalent Circuit Analysis of Ferromagnetic RF Integrated Inductors, TANABE SHINJI, SUGAHARA KENGO, YAMAGUCHI MASAHIRO, IKEDA SHINJI, BAE S, KONRAD A, 電気学会マグネティックス研究会資料,   2003 07 11
  • 自動車の内部構造を考慮した車室内の電磁場解析, SHIRAKI YASUHIRO, SUGAHARA KENGO, TANABE SHINJI, IGAWA SACHIO, WATANABE TETSUSHI, 電子情報通信学会大会講演論文集,   2002 03 07
  • Magnetic phase diagram near the quantum critical point in Ca_<2-x>Sr_xRuO_4, Sugahara Kengo, Nakatsuji Satoru, Yoshioka Masaki, Maeno Yoshiteru, Meeting abstracts of the Physical Society of Japan,   2001 03 09

Misc

  • Improvised Asymptotic Boundary Conditions for Quasi-Static Magnetic-Field Problems in Ellipsoidal Domains, 2016 IEEE CONFERENCE ON ELECTROMAGNETIC FIELD COMPUTATION (CEFC),   2016 , Refereed, 10.1109/CEFC.2016.7815888