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
Verifying the Energy-saving Effect of a Driver Advisory System using Speed Estimation for Freight Trains
論文No: ページ数: 7 日付: 2024/11/01
著者: Tomoyuki Ogawa (Railway Technical Research Institute), Toshihide Yokouchi (Railway Technical Research Institute), Yoko Takeuchi (Railway Technical Research Institute), Tatsuhito Saito (Railway Technical Research Institute)
キーワード : energy consumption，constant-speed driving operation，saw-toothed driving operation，motor efficiency
In this study, we have developed a driver advisory system using a speed estimation technique developed for freight trains aiming to ensure energy-saving and punctuality. The driver advisory system focuses cruising drivin ... more
Power Flow Control with Capacitor Voltage Control of Hexagonal Modular Multilevel Converter as a Loop Power Controller
論文No: ページ数: 14 日付: 2024/09/01
著者: Md Roknuzzaman (Nagasaki University), Shin-ichi Hamasaki (Nagasaki University)
キーワード : modular multilevel converter，loop power controller，arm current control，circulating current
This paper intensively discusses control of the transformer-less hexagonal modular multilevel converter (HMMC). The HMMC is applied as a loop power controller (LPC) for a three-phase power system in which the ends of two ... more
Optimal System for a Free-Positioning Wireless Power Transmitter with Coils Arranged in a Square Pattern
論文No: ページ数: 9 日付: 2024/09/01
著者: Keisuke Matsumura (Aoyama Gakuin University), Aozora Hata (Aoyama Gakuin University), Hirokazu Matsumoto (Aoyama Gakuin University), Yuki Sato (Aoyama Gakuin University)
キーワード : coil-array，FPGA-based control，multi-leg inverter，optimal current control，squarely arranged coils，wireless power transfer
This study introduces an optimal system combining a circuit configuration and control algorithm for wireless power transmitter with coils arranged in a square pattern. The system uses a four-leg half-bridge inverter to s ... more
Feedforward Control for Track Seeking Control in Hard Disk Drive with Sampled-Data Polynomial Based on Causal First-Order Hold
論文No: ページ数: 8 日付: 2024/09/01
著者: Kazuho Igarashi (Department of Mechanical Engineering, Chiba Institute of Technology), Ryo Igarashi (Department of Mechanical Engineering, Chiba Institute of Technology), Takenori Atsumi (Department of Mechanical Engineering, Chiba Institute of Technology
キーワード : hard disk drive，sampled-data control，first-order hold，feedforward control
This study presents a feedforward control method that reduces the seek time of hard disk drives (HDDs) using a sampled-data polynomial based on a causal first-order hold (CFOH). The method improves the seek time of the m ... more
A Single-Phase Class-E Direct AC-AC Converter Using Conduction Mode-Exchanged Pulse Density Modulation for Induction Heating System
論文No: ページ数: 10 日付: 2024/09/01
著者: Guiyi Dong (Maritime Science Div., Graduate School of Maritime Sciences, Kobe University), Tomokazu Mishima (Maritime Science Div., Graduate School of Maritime Sciences, Kobe University), Hideki Omori (Institute for Innovative Science and Technology, Naga
キーワード : bidirectional switch，direct ac-ac converter，pulse density modulation (PDM)，induction heating (IH)，soft-switching
This paper presents a new prototype of a single-phase class-E direct ac-ac converter for induction heating applications. In contrast to the multi-stage and traditional single-stage power conversion systems, the proposed ... more
Interoperability Verification of Wireless Power Transfer System with Separate Reference Impedance Map Method
論文No: ページ数: 9 日付: 2024/09/01
著者: Toshiyuki Fujita (Graduate School of Frontier Sciences, The University of Tokyo), Kodai Takeda (Hitach, Ltd.), Takehiro Imura (Tokyo University of Science), Takafumi Koseki (The University of Tokyo), Yusuke Minagawa (Japan Automobile Research Institute)
キーワード : inductive wireless power transfer，interoperability，compensation circuit design，impedance map
Wireless power transfer (WPT) system for electric vehicles is expected for different manufacturers to construct the transmitting and receiving sides. This paper proposes a reference impedance plane method for interoperab ... more
Enhanced Auto-Tuning of Feedback Controllers with Aggressive Search Ensuring Stability and Its Application to Galvano Scanner
論文No: ページ数: 8 日付: 2024/09/01
著者: Takuya Shiohara (Electrical and Mechanical Engineering Program, Department of Engineering, Nagoya Institute of Technology), Yoshihiro Maeda (Electrical and Mechanical Engineering Program, Department of Engineering, Nagoya Institute of Technology)
キーワード : auto-tuning，feedback controller，stability，parameter search space，galvano scanner，genetic algorithm
This paper presents a practical and high-performance auto-tuning method for feedback controllers in industrial servo systems aimed at achieving fast and precise positioning. Conventional auto-tuning approaches generally ... more
Novel Voltage Balance Strategy for a Cascade H-Bridge with a Wide Stable Operating Region and a Low Input Current THD
論文No: ページ数: 14 日付: 2024/09/01
著者: Zhaoyang Jin (Graduate School of Advanced Science and Engineering, Waseda University), Keiichiro Kondo (Graduate School of Advanced Science and Engineering, Waseda University)
キーワード : multilevel converter，cascade H-bridge，voltage balance，AC-DC converter
Cascade H-bridge (CHB) converters show promising potential across various applications, such as power electronic transformers and static synchronous compensator, because of their advantages such as modularity and the abi ... more
Improvement of Switching Characteristics for an Active Buffer Dual-Active-Bridge AC-DC Converter
論文No: ページ数: 9 日付: 2024/09/01
著者: Sindisiwe Malanda (Tokyo University of Marine Science and Technology), Shohei Komeda (Tokyo University of Marine Science and Technology), Hiroyasu Kifune (Tokyo University of Marine Science and Technology), Shunsuke Takuma (Nagaoka Power Electronics Co. L
キーワード : AC-DC converter，discharging switch，dual active bridge，zero voltage switching
In this paper, a control method to realize zero-voltage turn on in the discharging circuit is proposed of a single-phase converter based on a dual-active-bridge (DAB) dc-dc converter with an active energy buffer. The dis ... more
With electric motor emulators (EMEs) becoming a crucial testing apparatus for motor drives, enhancing the performance of the controller in an EME is important. Recent research has introduced feedforward terms based on th ... more
A Sensorless Tuning Method for Back-phasing Damping of a Stepping Motor
論文No: ページ数: 2 日付: 2024/09/01
著者: Kenshi Matsuo (Graduate School of Engineering Science, Akita University)
キーワード : stepping motor，rotor oscillation suppression，back-phasing damping，sensorless tuning，winding voltage
Stepping motors experience oscillation when positioning. A proposed sensorless tuning method for back-phasing damping can determine the appropriate excitation times to suppress the oscillation numerically according to ad ... more
Theoretical Consideration of the Long-length Primary Loop used in SCMaglev's DWPT System
論文No: ページ数: 7 日付: 2024/09/01
著者: Keisuke Yamamoto (Central Japan Railway Company), Jun Enomoto (Central Japan Railway Company), Shunsaku Koga (Central Japan Railway Company), Junichi Kitano (Central Japan Railway Company)
キーワード : wireless power transfer，SCmaglev，inductance，stray capacitance，earth return，elliptic function
The primary loop of the SCMaglev's DWPT system has several distinctive features compared to other DWPT systems. These include its length, order of several kilometers, its installation position close to the concrete roadb ... more
Control Method of Failure for One Unit of Double Three-Phase-Wound Permanent Magnet Synchronous Machine Drive System Using Coupling of Dual Resolver
論文No: ページ数: 7 日付: 2024/09/01
著者: Tatsuya Mori (Mitsubishi Electric Corporation), Hiroko Ikeda (Mitsubishi Electric Corporation), Toshihiro Matsunaga (Mitsubishi Electric Corporation), Kenji Ikeda (Mitsubishi Electric Corporation), Kenta Kubo (Mitsubishi Electric Corporation)
キーワード : double three-phase PMSM，double inverter，dual resolver
This paper presents a control method for the failure of one of the two units of a double three-phase-wound permanent magnet synchronous machine drive system without contact between these two units by estimating the state ... more
