Faculty Profiles - TAKEMOTO Masatsugu

Papers - TAKEMOTO Masatsugu

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Examination of Magnet-Less 3-Axis Magnetic Bearing with Cylindrical Rotor Reviewed

SUN Hao, 竹本真紹, 小笠原悟司

日本AEM学会誌 29 ( 1 ) 2021

Examination of Enhancing Efficiency of Axial Gap Motor in High Speed and High Torque Region by Adopting Neodymium Bonded Magnet Reviewed

Ren Tsunata, Masatsugu Takemoto, Satoshi Ogasawara, Koji Orikawa, Tatsuya Saito, Tomoyuki Ueno

IEEJ JOURNAL OF INDUSTRY APPLICATIONS 10 ( 4 ) 487 - 496 2021

An Active Common-noise Canceler Combined with Feedback Control Reviewed

小原峻介, 小笠原悟司, 竹本真紹, 折川幸司, 山本融真

電気学会論文誌 D 141 ( 1 ) 2021

A 2.5 MHz High-Frequency Output Inverter Based on Frequency Multiplying Technique with a Multi-Core Transformer using Mn-Zn Ferrite Materials Reviewed

Koji Orikawa, Satoshi Ogasawara, Masatsugu Takemoto, Jun-ichi Itoh

IEEJ JOURNAL OF INDUSTRY APPLICATIONS 10 ( 3 ) 370 - 376 2021

Reduction in Eddy Current Loss of Concentrated Windings in High-power Density IPMSM Using Rectangular Windings Reviewed

Shinnosuke Kajii, Masatsugu Takemoto, Takehiro Jikumaru, Fuminori Suzuki, Satoshi Ogasawara, Koji Orikawa

2021 22ND IEEE INTERNATIONAL CONFERENCE ON INDUSTRIAL TECHNOLOGY (ICIT) 221 - 227 2021

High Frequency Transformers with Adjustable Leakage Inductance using Wire Guides Reviewed

Ryohei Shintai, Koji Orikawa, Satoshi Ogasawara, Masatsugu Takemoto

23rd International Conference on Electrical Machines and Systems, ICEMS 2020 1547 - 1552 2020.11

Suppression of High-Frequency DC- And AC-Side Common-Mode Currents in DC-Fed Motor Drive Systems Reviewed

Shotaro Takahashi, Satoshi Ogasawara, Masatsugu Takemoto

23rd International Conference on Electrical Machines and Systems, ICEMS 2020 783 - 788 2020.11

An Isolated AC/DC Converter Using a Matrix Converter: A Feedback Control Method Considering the Non-linearity of a Diode Rectifier Reviewed

Wataru Kodaka, Satoshi Ogasawara, Koji Orikawa, Masatsugu Takemoto, Hiroyuki Tokusaki

IECON 2020 The 46th Annual Conference of the IEEE Industrial Electronics Society 2020.10

Investigation of Enhancing Output Power Density in Ultra-High-Speed Motors with Concentrated Winding Structure Reviewed

Takayuki Iida, Masatsugu Takemoto, Satoshi Ogasawra, Koji Orikawa, Ikuya Sato, Hiroyuki Kokubun, Akio Toba, Masao Syuto

2020 IEEE Energy Conversion Congress and Exposition (ECCE) 2020.10

Investigation of Operational Characteristics and Efficiency Enhancement of an Ultrahigh-Speed Bearingless Motor at 100 000 r/min Reviewed

Yu Fu, Masatsugu Takemoto, Satoshi Ogasawara, Koji Orikawa

IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS 56 ( 4 ) 3571 - 3583 2020.7

Development Policy of SMC to Improve Efficiency of Axial Gap Motor Employing Coreless Rotor Structure Reviewed

Ren Tsunata, Masatsugu Takemoto, Satoshi Ogasawara, Tatsuya Saito, Tomoyuki Ueno

2020 INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES (ICEM), VOL 1 1644 - 1650 2020

Basic Examination for a Hybrid Excitation Motor with a Field Winding on a Rotor Reviewed

仲沢龍翔, 竹本真紹, 小笠原悟司, 折川幸司

日本AEM学会誌 28 ( 3 ) 2020

Design of Main Circuit for an SiC-MOSFET Inverter Using a Thick Copper Multilayer PCB to Minimize Stray Inductance Reviewed

Ishikawa Kohsuke, Ogasawara Satoshi, Takemoto Masatsugu, Orikawa Koji

IEEJ Transactions on Industry Applications 140 ( 2 ) 89 - 98 2020

Language：Japanese Publisher：The Institute of Electrical Engineers of Japan

<p>Inverters using SiC or GaN power devices can achieve high frequency and high efficiency operation. To achieve high efficiency, the switching characteristics of these power devices are important because stray inductances in the main circuit of the inverter have a strong influence on the switching characteristics. To reduce switching loss and surge voltage, minimization of stray inductance in the main circuit is required for a high-frequency PWM inverter. This paper describes design guidelines for high-frequency inverters that achieve low inductance. The PCB design guideline on a thick multilayer PCB is derived from the inductance calculation using 3D-FEA. It is shown experimentally that the stray inductance of the designed PCB can be reduced to the same level as the inductance inside the power devices. Experimental results verify that a prototype can achieve high-speed switching and suppress a surge voltage. A load test is demonstrated to evaluate the main circuit efficiency in a half-bridge inverter at 100kHz.</p>

DOI： 10.1541/ieejias.140.89

Experimental Evaluation of the Relationship between Dimensional Dependencies of MnZn Ferrites and Filter Inductor Impedances Reviewed

Takahashi Shotaro, Ogasawara Satoshi, Takemoto Masatsugu, Orikawa Koji, Tamate Michio

IEEJ Transactions on Industry Applications 140 ( 6 ) 433 - 441 2020

Language：Japanese Publisher：The Institute of Electrical Engineers of Japan

<p>This study investigates the relationship between filter inductor impedance and dimensional resonance of MnZn ferrite. Experimental results clarify that multiple factors affect inductor impedance resonances. These can be classified into three factors: the inherent characteristics of a magnetic material, self-resonance due to winding stray capacitance, and winding that acts as a distributed constant line. Next, based on the measurement results, the dimensional dependencies of complex permeabilities (dimensional resonance) and the influence of dimensional resonance on inductor impedance are discussed in detail. Finally, this study verifies that the influence of dimensional resonance on complex permeability can be mitigated, and filter inductor impedance can be increased in the high frequency range by core lamination. All experiments are performed using off-the-shelf magnetic core products.</p>

DOI： 10.1541/ieejias.140.433

Switching Control Method for Voltage-Source PWM Inverters to Eliminate Conduction Noise between Phases Reviewed

埴岡翔太, 家澤雅宏, 小笠原悟司, 竹本真紹, 折川幸司

電気学会論文誌 D 140 ( 12 ) 2020

Examination of Enhancing Efficiency of Axial Gap Motor in High Speed and High Torque Region by Adopting Neodymium Bonded Magnet Reviewed

綱田錬, 竹本真紹, 小笠原悟司, 折川幸司, 齋藤達哉, 上野友之

電気学会論文誌 D 140 ( 12 ) 2020

Control of Three Phase to High Frequency Single Phase Matrix Converter Capable of High Power Factor Operation and Soft Switching Reviewed

小高渉, 小笠原悟司, 折川幸司, 竹本真紹, 徳崎裕幸

電気学会論文誌 D 140 ( 12 ) 2020

A study on the shape between the stator poles of a homopolar magnetic bearing integrated with four C-shaped cores Reviewed

Hao Sun, 竹本真紹, 小笠原悟司, 折川幸司

日本AEM学会誌 28 ( 4 ) 2020

Basics and Applications of Traction Motors for Electrically Driven Vehicles

竹本真紹

自動車技術 74 ( 12 ) 2020

Investigation of Development Policy of SMC Material for High Efficiency over a Wide Operating Range in Axial Gap Motors Having Coreless Rotor Structure Reviewed

綱田錬, 竹本真紹, 小笠原悟司, 折川幸司, 齋藤達哉, 榎園勇太, 上野友之

日本AEM学会誌 28 ( 2 ) 2020

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Papers - TAKEMOTO Masatsugu