Papers - TAKEMOTO Masatsugu

Hybrid Excitation Variable Flux Memory Motor for Enhancing Output Power and Efficiency During WLTC Driving Cycle in Traction Applications Reviewed

Riku Shinohara, Ren Tsunata, Masatsugu Takemoto, Jun Imai

2025 IEEE International Electric Machines & Drives Conference (IEMDC)   859 - 864   2025.5

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Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE  

DOI： 10.1109/iemdc60492.2025.11060964

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Investigation Into Suitable Number of Stator Slots of MW Class SPMSM Considering Laminated Rotor in Hybrid Propulsion System of Aircraft Reviewed

Takuya Moriki, Ren Tsunata, Masatsugu Takemoto, Jun Imai, Takehiro Jikumaru, Tomoya Yamamoto

2025 IEEE International Conference on Mechatronics (ICM)   1 - 6   2025.2

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Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE  

DOI： 10.1109/icm62621.2025.10934917

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Development of a Megawatt-Class Engine Embedded Electric Machine for Aircraft Electrification Reviewed

Tomoya Yamamoto, Takehiro Jikumaru, Ren Tsunata, Masatsugu Takemoto

2024 27th International Conference on Electrical Machines and Systems (ICEMS)   3311 - 3314   2024.11

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Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE  

DOI： 10.23919/icems60997.2024.10920990

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Basic Investigation of an IPMSM Employing Rotor Skew For Enhancing Output Power Under Field Weakening Control Reviewed

Yu Ichimura, Ren Tsunata, Masatsugu Takemoto, Jun Imai

IECON 2024 - 50th Annual Conference of the IEEE Industrial Electronics Society   1 - 6   2024.11

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Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE  

DOI： 10.1109/iecon55916.2024.10905421

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Adaptive Design of Bilateral Control Systems for Multivariate Reference Models Reviewed

Kota Kunihiro, Jun Imai, Masatsugu Takemoto, Ren Tsunata

2024 24th International Conference on Control, Automation and Systems (ICCAS)   1194 - 1195   2024.10

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Publishing type：Research paper (international conference proceedings)   Publisher：IEEE  

DOI： 10.23919/iccas63016.2024.10773360

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Comparative Study of Axial-Flux Machines Between Double Stator and YASA Structures Regarding Output Power Density and Efficiency in Traction Applications Reviewed

Yuki Nakano, Ren Tsunata, Masatsugu Takemoto, Jun Imai, Tatsuya Saito, Tomoyuki Ueno

2024 IEEE Energy Conversion Congress and Exposition (ECCE)   5219 - 5225   2024.10

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Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE  

DOI： 10.1109/ecce55643.2024.10861720

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Design of 160 kW, 50000 r/min Ultra-High Speed Traction Motor For Enhancing Output Power Density: Comparison of Different Rotor Core Materials Reviewed

Masaki Kimura, Ren Tsunata, Masatsugu Takemoto, Jun Imai

2024 IEEE Energy Conversion Congress and Exposition (ECCE)   5083 - 5089   2024.10

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Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE  

DOI： 10.1109/ecce55643.2024.10861861

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Impact of SMC Property on Axial Flux Machine Employing Ferrite PM in Traction Applications Reviewed

Ren Tsunata, Masatsugu Takemoto, Jun Imai, Tatsuya Saito, Tomoyuki Ueno

2024 International Conference on Electrical Machines (ICEM)   1 - 7   2024.9

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Publishing type：Research paper (international conference proceedings)   Publisher：IEEE  

DOI： 10.1109/icem60801.2024.10700121

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Superior Efficiency Under PWM Harmonic Current in an Axial-Flux PM Machine for HEV/EV Traction: Comparison With a Radial-Flux PM Machine Reviewed

Ren Tsunata, Masatsugu Takemoto, Jun Imai, Tatsuya Saito, Tomoyuki Ueno

IEEE Transactions on Industry Applications   60 ( 5 )   6736 - 6751   2024.9

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Publishing type：Research paper (scientific journal)   Publisher：Institute of Electrical and Electronics Engineers (IEEE)  

DOI： 10.1109/tia.2024.3410241

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Designing and Prototyping an Axial-Flux Machine Using Ferrite PM and Round Wire for Traction Applications: Comparison With a Radial-Flux Machine Using Nd-Fe-B PM and Rectangular Wire Reviewed

Ren Tsunata, Kosuke Izumiya, Masatsugu Takemoto, Jun Imai, Tatsuya Saito, Tomoyuki Ueno

IEEE Transactions on Industry Applications   60 ( 3 )   3934 - 3949   2024.5

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Publishing type：Research paper (scientific journal)   Publisher：Institute of Electrical and Electronics Engineers (IEEE)  

DOI： 10.1109/tia.2024.3371959

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Skewing Technology for Permanent Magnet Synchronous Motors: A Comprehensive Review and Recent Trends Reviewed

Ren Tsunata, Masatsugu Takemoto

IEEE Open Journal of the Industrial Electronics Society   5   1251 - 1273   2024

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Publishing type：Research paper (scientific journal)   Publisher：Institute of Electrical and Electronics Engineers (IEEE)  

DOI： 10.1109/ojies.2024.3491295

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Proposal of a Novel Air-Gap Structure for Magnet-Less 3-Axis Active Control-Type Magnetic Bearing with Cylindrical Rotor: Reducing Axial Length of Turbomachinery System Reviewed

Yuto Sho, Masatsugu Takemoto, Ren Tsunata, Jun Imai

2023 IEEE International Future Energy Electronics Conference (IFEEC)   114 - 119   2023.11

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Authorship：Corresponding author   Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE  

DOI： 10.1109/ifeec58486.2023.10458518

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The Superiority of Efficiency Considering Harmonic Current caused by PWM inverter in Axial-Flux PM Machine Using Ferrite PM for Traction applications: Comparison to Radial-Flux PM Machines Using NdFeB PM Reviewed

R. Tsunata, M. Takemoto, J. Imai, T. Saito, T. Ueno

2023 IEEE Energy Conversion Congress and Exposition (ECCE)   2023.11

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Language：English   Publishing type：Research paper (international conference proceedings)  

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Teaching Method for Electrical Machines Focusing on Differences Between Simulation and Experimental Verification Reviewed

Ren Tsunata, Masatsugu Takemoto

2023 IEEE 10th International Conference on E-Learning in Industrial Electronics (ICELIE)   2023.10

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Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE  

DOI： 10.1109/icelie58531.2023.10313104

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Comparison of Thermal Characteristics in Various Aspect Ratios for Radial-Flux and Axial-Flux Permanent Magnet Machines Reviewed

Ren Tsunata, Masatsugu Takemoto, Jun Imai, Tatsuya Saito, Tomoyuki Ueno

IEEE Transactions on Industry Applications   59 ( 3 )   3353 - 3367   2023.5

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Institute of Electrical and Electronics Engineers (IEEE)  

DOI： 10.1109/tia.2023.3255845

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Design and Analysis of Hybrid-Excitation Variable Flux Memory Motor for Traction Applications: Improving Output Power in High-Speed Area During Six-Step Operation Mode Reviewed

Ren Tsunata, Keito Yokomichi, Masatsugu Takemoto, Jun Imai

IEEE Access   11   82024 - 82036   2023

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Institute of Electrical and Electronics Engineers (IEEE)  

DOI： 10.1109/access.2023.3301809

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A Proposal of an Axial-Flux Permanent-Magnet Machine Employing SMC Core With Tooth-Tips Constructed by One-Pressing Process: Improving Torque and Manufacturability Reviewed

Ren Tsunata, Masatsugu Takemoto, Jun Imai, Tatsuya Saito, Tomoyuki Ueno

IEEE Access   11   109435 - 109447   2023

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Institute of Electrical and Electronics Engineers (IEEE)  

DOI： 10.1109/access.2023.3321829

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Novel Rotor Structure Employing Large Flux Barrier and Disproportional Airgap for Enhancing Efficiency of IPMSM Adopting Concentrated Winding Structure Reviewed

Xianji Tao, Masatsugu Takemoto, Ren Tsunata, Satoshi Ogasawara

IEEE Access   11   2848 - 2862   2023

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Institute of Electrical and Electronics Engineers (IEEE)  

DOI： 10.1109/access.2022.3232843

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Reduction in Eddy Current Loss of Special Rectangular Windings in High-Torque IPMSM Used for Wind Generator Reviewed

Xianji Tao, Masatsugu Takemoto, Ren Tsunata, Satoshi Ogasawara

IEEE Access   11   4740 - 4751   2023

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Publishing type：Research paper (scientific journal)   Publisher：Institute of Electrical and Electronics Engineers (IEEE)  

DOI： 10.1109/access.2023.3236105

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Evaluation of Switching Ripple Effect on Efficiency of Novel Spoke-Type IPMSM Using Dy-Free Magnet-Comparison to IPMSM using NbFeB Magnet Reviewed

Jiseong Park, Ren Tsunata, Masatsugu Takemoto, Satoshi Ogasawara, Koji Orikawa

2022 25th International Conference on Electrical Machines and Systems (ICEMS)   2022.11

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Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE  

DOI： 10.1109/icems56177.2022.9983187

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