Investigation of Electric Field Coupling Wireless Power Transfer System with Immittance Converters
論文No: ページ数: 10 日付: 2024/12/01
著者: 広沢 友貴（青山学院大学），御園 惟人（青山学院大学），佐藤 佑樹（青山学院大学），松本 洋和（青山学院大学）
キーワード : イミタンス変換器，ワイヤレス送電システム，電界結合方式 immittance converter，wireless power transfer system，capacitive wireless power transfer
This study proposes a capacitive wireless power transfer system using immittance converters. In this system, two immittance converters were set in the front and back stages of the coupler, enabling the suppression of the ... more
It is important to drive an IPM motor system stably. However, unstable oscillation at the DC input has been reported. According to the impedance method, the stability is assured when the input admittance of the drive sys ... more
Inductors used in power converter circuits are subjected to various currents when rectangular voltage waveforms are applied. Under these conditions, instead of forming a hysteresis loop, the magnetic material in the indu ... more
This paper presents a PWM control method for three-phase to single-phase matrix converters based on the fundamental component of the high-frequency output voltage. Power converters used in resonant circuit configurations ... more
This paper proposes a novel permanent-magnet synchronous motor (PMSM) mathematical model based on the premise that only armature reaction flux causes iron loss. It insists that the total loss in the case of zero torque i ... more
Effect of DC-link Capacitor on EMI Characteristics of Large-Current SiC Power Module
論文No: ページ数: 11 日付: 2024/12/01
著者: 井渕 貴章（大阪大学），舟木 剛（大阪大学）
キーワード : SiCパワーモジュール，DCリンクキャパシタ，過渡応答モデリング，伝導ノイズ SiC power module，DC-link capacitor，transient response modeling，conducted noise
This paper studies electromagnetic interference (EMI) noise mitigation for large-current SiC power modules with integrated DC-link capacitors. Symmetrically-placed DC-link capacitors in a power module most effectively re ... more
This paper proposes a new generalized zero-phase-correction method for the linear signal comparison PWM. The proposed method has the following features: (a) It is simple. (b) By using the method, it can easily generate v ... more
Flywheels have several advantages such as long life, high reliability, and high environmental resistance. This paper describes the application of flywheel to uninterruptible power supplies that rotate a motor-generator a ... more
Scheduled Train Timetable Evaluation Method Considering Convenience, Simplicity and Robustness
論文No: ページ数: 7 日付: 2024/11/01
著者: 香取 照臣（日本大学理工学部応用情報工学科）
キーワード : 計画ダイヤ評価，損失時間，運転時隔，転てつ機転換回数，編成数 train schedule evaluation，passenger's loss time，operation interval，turning number of switches，number of train sets
A train schedule is determined the transport capacity and track layout based on passengers demand.A railway line has several schedules, making schedules are necessary evaluated for quantity comparison. In particular, whe ... more
This study aims to improve the efficiency of an induction motor. The efficiency was measured under a load test using the inverter drive to verify the loss reduction effect when the winding changeover was applied. The str ... more
This study aims to increase the power density of electromagnetic pumps for automatic pouring at casting sites by clarifying the magnetic force required for the electromagnetic transport of liquid metal. This paper report ... more
In this study, we describe a temperature calculation method with a large network solver for transposed armature windings of a turbine generator. As is well known, a significant amount of circulating current flows within ... more
This study reports on the common-mode (CM) voltage suppression of a passive common-noise canceller (PCC), which can cancel CM noise generated by pulse-width-modulation (PWM) inverters. The proposed PCC is characterized b ... more
Evaluation of Energy Utilization Ratio and Phase Plane Analysis of Bias Torque Function Control
論文No: ページ数: 7 日付: 2024/11/01
著者: Soramichi Takahashi (Tokyo University of Technology), Naoki Amano (Tokyo University of Technology), Shigeyuki Takagi (Tokyo University of Technology)
キーワード : electric vehicle，vehicle motion，torque function control，energy saving，energy utilization ratio，phase plane analysis
In the previous study on the bias torque function control (B-TFC) for slip suppression control, the maximum acceleration performance was improved for the B-TFC (TB =13.01[Nm]), and conventional TFC, and the method withou ... more
Time-efficient Design of Energy-efficient Train Operation Strategy with Multi-fidelity Train Simulators
論文No: ページ数: 9 日付: 2024/11/01
著者: Xuanlang Meng (Department of Electrical Engineering and Information System, Graduate School of Engineering, The University of Tokyo), Wataru Ohnishi (Department of Electrical Engineering and Information System, Graduate School of Engineering, The Universi
キーワード : automatic train operation，energy-efficient operation，fine tuning，regenerative braking energy，power supply network，collaborative train operation
Designing energy-efficient train operation strategies presents a significant computational challenge due to the inherent nonlinearity introduced by factors such as friction forces, motor efficiency variations, and power ... more
Bidirectional Power Flow Control Using Four-Switch Buck-Boost Converter in DC Power Network
論文No: ページ数: 7 日付: 2024/11/01
著者: Kenta Kitazoe (Graduate School of Engineering, Chiba University), Kenji Natori (Graduate School of Engineering, Chiba University), Yukihiko Sato (Graduate School of Engineering, Chiba University)
キーワード : DC power network，bidirectional power flow control，four-switch buck-boost converter (FSBBC)
In this study, we examine the use of a four-switch buck-boost converter (FSBBC) as a bidirectional power flow controller (BPFC) for flexible power flow control in DC power networks. In our previous studies, a cascaded bo ... more
Improved Angle Calculation Method of Magnetic Absolute Encoder with Different Magnetic Flux Densities
論文No: ページ数: 8 日付: 2024/11/01
著者: Takashi Ohhira (Department of Electrical, Electronic, and Communication Engineering, Chuo University), Yuto Watanabe (Department of Electrical, Electronic, and Communication Engineering, Chuo University), Hideki Hashimoto (Department of Electrical, Electr
キーワード : absolute encoder，magnetic encoder，adaptive filter，phase-locked loops (PLLs)，normalized least mean square (NLMS)
This paper proposes an angle calculation method to improve the accuracy of a magnetic absolute encoder with different magnetic flux densities (MAE-DMFD). Magnetic encoders have a conflicting relationship between the abso ... more
Unified Theory of Non-Resonant and Resonant Circuits in Inductive Power Transfer and Capacitive Power Transfer
論文No: ページ数: 12 日付: 2024/11/01
著者: Hirono Namiki (Imura-Hori Laboratory, Tokyo University of Science), Takehiro Imura (Imura-Hori Laboratory, Tokyo University of Science), Yoichi Hori (Imura-Hori Laboratory, Tokyo University of Science)
キーワード : inductive power transfer，capacitive power transfer，transmission characteristics，circuits
This paper provides a general and systematic comparison of the transmission characteristics for circuits non-resonant, series resonant, and parallel resonant circuits of both Inductive Power Transfer (IPT) and Capacitive ... more
論文No: ページ数: 10 日付: 2024/11/01
著者: Dinh Phuc Nguyen (National Taiwan University of Science and Technology), Yu-Chen Liu (National Taipei University of Technology), Xing-Rou Chen (National Taiwan University of Science and Technology), Huang-Jen Chiu (National Taiwan University of Science an
キーワード : flying capacitor multilevel (FCML)，coupled inductors，triangular conduction mode (TCM)，interleaved
This study introduces an optimization method that utilizes the adaptive deadtime of the triangular conduction mode (TCM) in an interleaved four-level flying capacitor boost converter with coupled inductors for photovolta ... more
Unified Theory of Series, Parallel and LCL/CLC Resonant Circuits in Inductive Power Transfer and Capacitive Power Transfer
論文No: ページ数: 14 日付: 2024/11/01
著者: Hirono Namiki (Imura-Hori Laboratory, Tokyo University of Science), Takehiro Imura (Imura-Hori Laboratory, Tokyo University of Science), Yoichi Hori (Imura-Hori Laboratory, Tokyo University of Science)
キーワード : inductive power transfer，capacitive power transfer，transmission characteristics
This paper provides a general and systematic comparison of the transmission characteristics of series, parallel and LCL/CLC resonant circuits of both Inductive Power Transfer (IPT) and Capacitive Power Transfer (CPT). Th ... more
Validation and Design of a Modular Three-Phase WPT System with Improved Misalignment Tolerance by Using an Effective Resonant Frequency Stabilization Technique
論文No: ページ数: 14 日付: 2024/11/01
著者: Ching-Ming Lai (Department of Electrical Engineering, National Chung Hsing University), Hao-En Liu (Department of Electrical Engineering, National Chung Hsing University), Tomokazu Mishima (Department of Oceanology, Marine Technology and Engineerings Divi
キーワード : wireless power transfer (WPT)，modular three-phase system，resonant frequency stabilization (RFS)，PTE optimization，misalignment tolerance improvement
In modular three-phase wireless power transfer (WPT) systems, efficiency is crucial, and the consistency of the resonant frequency in each phase module directly affects efficiency. This paper discusses an effective reson ... more
Development of Iterative Algorithm for High Frequency Transformer Used in Solid State Transformers and its Validation via Finite Element Analysis
論文No: ページ数: 12 日付: 2024/11/01
著者: Sherin Joseph (Saintgits College of Engineering/APJ Abdul Kalam Technological University/College of Engineering Chengannur), Shajimon K John (Muthoot Institute of Technology and Science), Pinkymol K. P (National Institute of Technology), K. R. M Nair
キーワード : smart grid，solid state transformer，high frequency transformer，optimum design，iterative algorithm，finite element analysis
The optimum design and development of a high-frequency transformer (HFT) is a key requirement in the development of a solid state transformer (SST) for incorporating in smart grid environment. This paper proposes an iter ... more
Image Processing-Based Weight Estimation for Steel Cylinders
論文No: ページ数: 8 日付: 2024/11/01
著者: Junya Sato (Faculty of Engineering, Gifu University), Kaishi Shimizu (Graduate School of Natural Science and Technogoly, Gifu University), Takumi Hirashita (ASAHI FORGE CORPORATION), Kosei Umemura (ASAHI FORGE CORPORATION), Shota Asahi (ASAHI FORGE CORPOR
キーワード : weight estimation，image processing，3D reconstruction
We have been tackling a problem of weight estimation of steel cylinders using image processing with an error of less than ±10g. In our previous studies, the weight was estimated by capturing multiple images of an entire ... more
Impedance Analysis of Parity-Time Wireless Power Transfer System using Digital Separate-Oscillation
論文No: ページ数: 8 日付: 2024/11/01
著者: Toshiyuki Fujita (Graduate School of Frontier Sciences, The University of Tokyo), Yuya Deguchi (Graduate School of Frontier Sciences, The University of Tokyo), Hiroshi Fujimoto (Graduate School of Frontier Sciences, The University of Tokyo)
キーワード : wireless power transfer，circuit modeling，parity-time symmetry，separate-oscillation，digital control
A wireless power transfer system has been widely developed for various applications. A parity-time symmetry WPT (PT-WPT) technology is currently attracting attention for ensuring the robustness of the coupling coefficien ... more
Technical Analysis of Occupational Fatal Accidents in Malaysia Using Machine Learning Techniques
論文No: ページ数: 12 日付: 2024/11/01
著者: Hanane Zermane (Industrial Engineering Department, Faculty of Technology, University of Batna 2), Abderrahim Zermane (Safety Engineering Interest Group, Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysi
キーワード : risk management，neuro-linguistic programming，machine learning，mixed-method analysis，prevention management
With the rapid economic growth of Malaysia, workplace accidents have increased drastically, according to the Department of Occupational Safety and Health (DOSH). This study aimed to determine the patterns in Malaysian wo ... more
Vibration Suppression of Cantilever Using Piezoelectric Actuator Through Optimal Design for Actuator Position and Control Parameters
論文No: ページ数: 8 日付: 2024/11/01
著者: Yuya Watanabe (Department of Engineering, Nagoya Institute of Technology), Kenta Seki (Department of Engineering, Nagoya Institute of Technology), Makoto Iwasaki (Department of Engineering, Nagoya Institute of Technology)
キーワード : vibration suppression，piezoelectric actuator，optimal design，particle swarm optimization，cantilever
Vibration suppression is an extremely important aspect in mechatronic equipment, and the placement of actuators/sensors and control system design greatly impacts vibration control performance. In this study, a simultaneo ... more
Evaluation of Electrical Model Parameter Changes in SiC Power MOSFETs During Power Cycling Test
論文No: ページ数: 10 日付: 2024/11/01
著者: Shuhei Fukunaga (Division of Electrical, Electronic and Infocommunications Engineering, Graduate School of Engineering, Osaka University), Yuki Nakamura (Division of Electronic and Information Engineering, Osaka University), Tsuyoshi Funaki (Division of E
キーワード : SiC MOSFET，power module，reliability，power cycling test，gate threshold voltage instability
Silicon carbide (SiC) power modules have witnessed significant advancements in recent years, and adopted in a wide range of power electronics applications. The long-term reliability of SiC power modules is key for the re ... more
This paper proposes a method for weld root crack detection in metal plates using nonlinear ultrasonic methods. Second harmonic components of Lamb waves are generated during propagation, which makes it difficult to distin ... more
Splitting Conductors of Coils on PCB for AC-resistance Reduction
論文No: ページ数: 2 日付: 2024/11/01
著者: Shunsaku Nomoto (Nagaoka University of Technology), Shinjiro Shimura (Nagaoka University of Technology), Keisuke Kusaka (Nagaoka University of Technology), Takashi Takada (AGC Inc.)
キーワード : skin effect，proximity effect，spiral coil，printed circuit board (PCB)
This letter proposes a method to suppress copper loss due to the skin and proximity effect (AC-resistance) by splitting the conductors of a coil on a printed circuit board (PCB) into some traces and swapping them at the ... more
Study on Control of Electronic Frequency Converters for Continuous Operation in the Event of a Short-Circuit Fault at Feeding Circuit in Independent Operation
論文No: ページ数: 9 日付: 2024/11/01
著者: Toshimasa Shimizu (Central Japan Railway Company), Ken Kunomura (Central Japan Railway Company), Hiroki Miyajima (Toshiba Infrastructure Systems & Solutions Corporation), Takumi Nagai (Toshiba Infrastructure Systems & Solutions Corporation)
キーワード : electronic frequency converter，short or ground fault，overcurrent suppression control
In this paper, we describe the control of electronic frequency converters (EFCs), which enables them to continue independent operation in the event of a fault, which is necessary to replace all the frequency conversion f ... more
