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
This study presents a design method for high-torque-density air-core distributed windings with round wires applied to slotless permanent magnet synchronous motors (SL-PMSMs). The authors extend the conventional method to ... more
Estimation of Arm Stiffness Using Force Information of a Hand in Contact with a Highly Rigid Environment
論文No: ページ数: 7 日付: 2024/07/01
著者: Ryosuke Shibuya (Graduate School of Science and Engineering, Saitama University), Toshiaki Tsuji (Graduate School of Science and Engineering, Saitama University)
キーワード : stiffness estimation，electromyography，regression analysis，equilibrium point hypothesis
Estimating human stiffness is crucial for achieving precise robotic manipulation through variable impedance control. For in order to enable a robot to replicate human-like stiffness, it is essential to have a comprehensi ... more
Design and Optimization of Different Integrated Bearingless Motor Topologies for Magnetic-Geared Motors
論文No: ページ数: 8 日付: 2024/07/01
著者: Akira Kumashiro (Tokyo Institute of Technology), Yusuke Fujii (Tokyo Institute of Technology), Akira Chiba (Tokyo Institute of Technology), Wolfgang Gruber (Johannes Kepler University), Gerald Jungmayr (Linz Center of Mechatronics)
キーワード : magnetic geared motor，bearingless motor，magnetic gear，magnetic suspension，consequent-pole motor
Magnetic-geared motors have many advantages over mechanical gearboxes, such as reduced maintenance and overload protection. However, the limited life of the mechanical bearings, which hold a high-speed rotor, is problema ... more
Technical Trends of SiC Power Semiconductor Devices and Their Applications in Power Electronics
論文No: ページ数: 7 日付: 2024/07/01
著者: Naoto Fujishima (Fuji Electric Co., Ltd.)
キーワード : power device，MOSFET，power electronics，renewable energy，electrified vehicle
Power electronics technologies play important roles in energy conservation and low-carbon goals, whereby power devices, such as silicon IGBTs and SiC-MOSFETs, are key components that support the efficient use of energy b ... more
Defect Detection in Metal-Ceramic Substrate Based on Image Processing and Machine Learning
論文No: ページ数: 10 日付: 2024/07/01
著者: Min Zou (Graduate School of Engineering Science, Akita University), Kota Matsunaga (Faculty of Engineering Science, Akita University), Yuji Ueda (Dowa Power Device Co., Ltd.), Tsuyoshi Sugawara (Dowa Power Device Co., Ltd.), Hideyo Osanai (Dowa Power Devi
キーワード : defect detection，feature extraction，CNN，classification，deep learning
Automatic detection of defects in a substrate is important in the manufacturing process. Defect detection in metal-ceramic substrates relies on manual assembly lines, which are laborious and time consuming. This study de ... more
Acceleration Bias Drift Observer for Industrial Robots with an Accelerometer and Its Applications
論文No: ページ数: 11 日付: 2024/07/01
著者: Sora Nagao (Nagaoka University of Technology), Yusuke Kawai (National Institute of Technology, Ichinoseki College), Yuki Yokokura (Nagaoka University of Technology), Kiyoshi Ohishi (Nagaoka University of Technology), Toshimasa Miyazaki (Nagaoka University
キーワード : acceleration bias drift observer，load-side acceleration sensor，two-inertia system，industrial robot
The feedback of load-side acceleration is an effective method in the control of a two-inertia system. The load-side acceleration is generally obtained using an acceleration sensor. However, the bias drift of the sensor p ... more
Experimental Evaluation of the Online MTPA Angle Search Method Based on Flux-linkage Plane Estimation for IPMSMs
論文No: ページ数: 9 日付: 2024/07/01
著者: Shigeo Morimoto (Osaka Metropolitan University), Yuki Shimizu (College of Science and Engineering, Ritsumeikan University), Yukinori Inoue (Osaka Metropolitan University), Masayuki Sanada (Osaka Metropolitan University)
キーワード : interior permanent magnet synchronous motor (IPMSM)，online parameter estimation，maximum torque per ampere (MTPA) control，cross-saturation，flux-linkage plane estimation
Maximum torque per ampere (MTPA) control is a typical control method for achieving a high-efficiency operation for interior permanent magnet synchronous motors (IPMSMs). However, inductances of IPMSMs with magnetic satur ... more
Disturbance Response and Force Control of a Magnetic Lead Screw Actuator
論文No: ページ数: 8 日付: 2024/07/01
著者: Akira Heya (Department of Mechanical Systems Engineering, Graduate School of Engineering, Nagoya University), Yoshihiro Nakata (Department of Mechanical and Intelligent Systems Engineering, Graduate School of Informatics and Engineering, The University of
キーワード : magnetic lead screw，linear actuator，force control，sensor-less force control，magnetic lead screw actuator
This paper presents the disturbance response and sensor-less force control of a magnetic lead screw actuator (MLSA) that generates linear motion; it is composed of a magnetic lead screw and a rotary motor. This MLSA exhi ... more
A dual current source inverter for an induction motor drive is presented in this paper. The dual inverter consists of two inverters connected in parallel and has single a dc power source. The inverters are operated using ... more
Over 99.7% Efficiency at 100kW DC-DC Power Conversion using a 3.3kV SiC Device and Discussion on Device dv/dt Estimation
論文No: ページ数: 11 日付: 2024/07/01
著者: Atsuo Kawamura (The Electrical and Computer Engineering, Yokohama National University), Yukinori Tsuruta (The Electrical and Computer Engineering, Yokohama National University), Hidemine Obara (The Electrical and Computer Engineering, Yokohama National Un
キーワード : DC-DC power conversion，efficiency，efficiency measurement，SiC
This paper is a re-evaluation of a completed project (High Efficiency Demonstration Grant Using High Voltage SiC Device) from the perspective of accurate efficiency measurement; additionally, this paper discusses on devi ... more
Analysis and Design of Class-E Amplifier with Nonlinear Output Capacitance Model Using Sigmoid Function for GaN HEMT
論文No: ページ数: 8 日付: 2024/07/01
著者: Shota Seki (Graduate School of Engineering., Osaka University), Tsuyoshi Funaki (Graduate School of Engineering., Osaka University)
キーワード : class-E，soft-switching，GaN，sigmoid，27.12，40.68
High-switching frequency power converters are used in wireless power transmission and material processing. Soft-switching technique is crucial to reduce switching loss in high-frequency operation, e. g. ISM (Industrial S ... more
Torque Improvement in Spoke-Type Interior Permanent Magnet Motors Using Resin-Unit-Type Shaft Fastening Structures
論文No: ページ数: 8 日付: 2024/07/01
著者: Shoki Nakagoshi (Department of Electrical, Electronics and Information Engineering, Nagaoka University of Technology), Yuki Hidaka (Department of Electrical, Electronics and Information Engineering, Nagaoka University of Technology)
キーワード : spoke-type interior permanent magnet motor，resin unit，torque，leakage flux
This paper presents a novel rotor structure for spoke-type interior permanent magnet motors. In the proposed motor, the rotor is fastened to the shaft using a resin unit. Thus, the inner-side core, which is the leakage p ... more
Topology Optimization for Motor Slot with Heat Generation Rate Depending on Winding Occupancy
論文No: ページ数: 10 日付: 2024/07/01
著者: Akihiro Katsuno (Graduate School of Science and Technology, Keio University), Toshiyuki Murakami (Department of System Design Engineering, Keio University)
キーワード : homogeneous material，equivalent thermal conductivity，electrical winding，peak temperature，topology optimization
This study developed a two-dimensional heat path topology optimization method that minimizes the peak temperature inside motor slots. By representing the coil and varnish as a homogenized material, the problem was simpli ... more
This paper proposes a phase-synchronization method for double-sided LCC wireless power transfer systems with active rectifiers, achieved by using a current detector. The detector can be constructed inexpensively by simpl ... more
Study on Decreasing the Rotor Eddy Current Loss of Surface Permanent-Magnet Motors with Copper Sleeves
論文No: ページ数: 10 日付: 2024/07/01
著者: Takahiro Mizuta (Mitsubishi Electric Corporation Advanced Technology R&D Center), Kazumasa Ito (Mitsubishi Electric Corporation Advanced Technology R&D Center), Toshinori Tanaka (Mitsubishi Electric Corporation Advanced Technology R&D Center)
キーワード : surface permanent magnet motors，eddy current loss，carrier harmonic，slot harmonic
In high-speed surface permanent-magnet motors, eddy current loss in the rotor caused by magnetic flux harmonics is a significant problem. Although copper sleeves can reduce the eddy current loss of the rotor, the reducti ... more
Development of Dual Active Bridge DC-DC Converter to Achieve High Efficiency in Wide Voltage and Load Range and Application to V2H Systems
論文No: ページ数: 14 日付: 2024/07/01
著者: Shogo Nakahara (Diamond & Zebra Electric Mfg. Co., Ltd.), Satoshi Nagai (Diamond & Zebra Electric Mfg. Co., Ltd.), Makoto Ochiai (Diamond & Zebra Electric Mfg. Co., Ltd.), Yoshitaka Muguruma (Diamond & Zebra Electric Mfg. Co., Ltd.), Shinya Kawai (Tokyo E
キーワード : isolated bidirectional DC/DC converter，dual active bridge converter (DAB)，zero voltage switching (ZVS)，V2H
This paper proposes a zero-voltage switching (ZVS) scheme for a dual active bridge (DAB) converter in the full load range. The switching state of the DAB converter with a phase-shift control becomes a hard switching stat ... more
The Japanese government has set the target reduction in CO2 emissions by 46% in 2030 compared to their 2013 level, and achieving this represents big challenges to be overcome. Because of the land and weather characterist ... more
This paper presents a torque estimation method for variable speed induction motors for factory tests that does not use a torque or rotational speed meter. A new algorithm, which takes into account the torque reduction co ... more
