Faculty Profiles - TAKEMOTO Masatsugu

Papers - TAKEMOTO Masatsugu

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Development of frequency-analysis equipment capable of judging propagation direction of conductive EMI Reviewed

Noriyuki Nosaka, Satoshi Ogasawara, Masatsugu Takemoto, Yoshitaka Iwaji, Kazutoshi Ogawa

2014 IEEE Energy Conversion Congress and Exposition (ECCE) 2014.9

A Novel Magnet Polarity Identification Method for Initial Position Estimation for Sensorless IPMSM Drive Reviewed

Minglei Gu, Satoshi Ogasawara, Masatsugu Takemoto

IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING 9 ( 4 ) 434 - 441 2014.7

Developments of Ferrite PM In-Wheel Motors with Axial-Gap Structure for Electric City Commuters Reviewed

M. Takemoto, K. Sone, S. Ogasawara, W. Hino, K. Takezaki

the EVTeC 2014 & APE Japan ( 20144075 ) 2014.5

Sensorless IPMSM position estimation based on multi SVPWM with elimination of inverter nonlinear effects Reviewed

Minglei Gu, Satoshi Ogasawara, Masatsugu Takemoto

IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING 9 ( 2 ) 219 - 227 2014.3

Examination for the Higher Efficiency in a Ferrite Permanent Magnet 10 kW In-Wheel Axial-Gap Motor with Coreless Rotor Structure Reviewed

Kodai Sone, Masatsugu Takemoto, Satoshi Ogasawara, Kenichi Takezaki, Wataru Hino

2014 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE) 5885 - 5892 2014

Development of a High-Frequency Space Vector Pulse Width Modulated Inverter with an Active Common-Noise Canceler Reviewed

Masashi Ogawa, Satoshi Ogasawara, Masatsugu Takemoto

2014 IEEE 36TH INTERNATIONAL TELECOMMUNICATIONS ENERGY CONFERENCE (INTELEC) 2014

A Decoupling Method for Current Regulation in Bearingless Motors Using AC Suspension Current Reviewed

Kimio Hijikata, Nozomu Ando, Masatsugu Takemoto, Satoshi Ogasawara

2014 17TH INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS (ICEMS) 2310 - 2314 2014

Consideration of 10kW In-Wheel Type Axial-Gap Motor Using Ferrite Permanent Magnets Reviewed

Kodai Sone, Masatsugu Takemoto, Satoshi Ogasawara, Kenichi Takezaki, Wataru Hino

2014 INTERNATIONAL POWER ELECTRONICS CONFERENCE (IPEC-HIROSHIMA 2014 - ECCE-ASIA) 3525 - 3531 2014

Verification of a Novel 5-axis Active Control Type Bearingless Canned Motor Pump Utilizing Passive Magnetic Bearing Function for High Power Reviewed

Kazuya Miyamoto, Masatsugu Takemoto, Satoshi Ogasawara, Masao Hiragushi

2014 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE) 2454 - 2461 2014

Basic Characteristic of A Two-Unit Outer Rotor Type Bearingless Motor with Consequent Pole Permanent Magnet Structure Reviewed

Masatsugu Takemoto

2014 INTERNATIONAL POWER ELECTRONICS CONFERENCE (IPEC-HIROSHIMA 2014 - ECCE-ASIA) 1000 - 1005 2014

A Feedback-Type Dead-Time Compensation Method for High-Frequency PWM Inverters with Low Distortion and High Voltage Utiliazation Factor Characteristics Reviewed

OGAWA Masashi, OGASAWARA Satoshi, TAKEMOTO Masatsugu

IEEJ Transactions on Industry Applications 133 ( 10 ) 970 - 977 2013.10

Language：Japanese Publisher：一般社団法人電気学会

This paper proposes a new feedback-type dead-time compensation method. The proposed method compensates the output voltage by employing two operations. First, the normal compensation matches the width of the output pulse to that of the input pulse with reduced delay time from the input pulse to the output pulse compared with the conventional method. Second, the short pulse compensation generates an output pulse after a few pulses are input so that the average value of the output signal equals that of the input signal. The voltage utilization factor of the proposed method is almost 100%, because there is no limit to the compensation and the decrease in the fundamental output caused by dead time is eliminated. The experimental results using a 100-kHz input signal show that there is no discrepancy between the output pulse width and the input pulse width. Furthermore, the THD of the compensated output current, when the output frequency is 50Hz, is eliminated, compared with that of the output current without compensation. These results show that the proposed method has low distortion and high voltage utilization factor characteristics.

DOI： 10.1541/ieejias.133.970

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A Study of Simulation Methods Suitable for Real-Time Simulators Reviewed

KUBO Yuki, OGASAWARA Satoshi, TAKEMOTO Masatsugu

IEEJ Transactions on Industry Applications 133 ( 7 ) 714 - 720 2013.7

Language：Japanese Publisher：一般社団法人電気学会

This paper proposes simulation methods based on the forward Euler method that are suitable for real-time simulators. However, real-time simulation using the forward Euler method has the following problems: A simulation error caused by a time step limitation and a delay in the simulated waveforms. The authors have proposed a simulation method suitable for real-time simulators, but the physical meaning of the state variables is diluted by diagonalization of the system matrix. This paper proposes a simulation method to obtain the same characteristics as the previous method, without diagonalization. Off-line and real-time simulation results demonstrate the validity and usefulness of the proposed simulation method.

DOI： 10.1541/ieejias.133.714

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Experiments for a Prototype Machine with Proposed High Power Structure in a 5‐axis Active Control Type Bearingless Canned Motor Pump Reviewed

松崎達也, 土方規実雄, 宮本和弥, 竹本真紹, 小笠原悟司, 平櫛真男

日本AEM学会誌 21 ( 2 ) 196 - 202 2013.6

Language：Japanese Publisher：The Japan Society of Applied Electromagnetics and Mechanics

A bearingless motor is characterized by integration of an electrical motor and a magnetic bearing. Electromagnetic force generated by the magnetic bearing function can realize magnetic suspension of a rotor shaft without mechanical contacts. Principal authors have been proposing a non-contact canned motor pump using the bearingless motor. This pump has no expendable parts, such as shaft seals, mechanical bearings and lubricant. Therefore, it can realize next advantages; 1. clean liquid sending. 2. maintenance free 3. longer operating life. 4. high chemical resistance. The previous paper has proposed novel structure which can generate high output and high suspension force compared with conventional structure. A prototype bearingless canned motor pump with the proposed high power structure is produced, and characteristics of suspension force and torque is tested in the prototype machine. This paper introduces the experimental results of the prototype machine with the proposed high power structure in detail.

DOI： 10.14243/jsaem.21.196

Operation Characteristics of Ferrite Permanent Magnet In-Wheel Axial-Gap Motor with Coreless Rotor Structure for Electric City Commuters Reviewed

Kodai Sone, Masatsugu Takemoto, Satoshi Ogasawara, Kenichi Takezaki, Wataru Hino

2013 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE) 3186 - 3193 2013

Novel PWM Scheme with Multiphase SVPWM for Reducing Current Ripple Reviewed

Minglei Gu, Satoshi Ogasawara, Masatsugu Takemoto

2013 1ST INTERNATIONAL FUTURE ENERGY ELECTRONICS CONFERENCE (IFEEC 2013) 652 - 657 2013

Non-Linear Common-Mode Equivalent Circuit for Inverter-Fed Motor Drive Systems Reviewed

Yizhanyi Tang, Satoshi Ogasawara, Masatsugu Takemoto

2013 IEEE ECCE ASIA DOWNUNDER (ECCE ASIA) 278 - 284 2013

Ferrite-Magnet Spoke-Type IPMSM with W-Shaped Magnet Placement Reviewed

Kazuya Chiba, Masatsugu Takemoto, Satoshi Ogasawara, Woo Gyong Yim

39TH ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY (IECON 2013) 2869 - 2874 2013

An Inductance Estimation Method for Sensorless IPMSM Drives Based on Multiphase SVPWM Reviewed

Minglei Gu, Satoshi Ogasawara, Masatsugu Takemoto

2013 1ST INTERNATIONAL FUTURE ENERGY ELECTRONICS CONFERENCE (IFEEC 2013) 646 - 651 2013

Rotor Structure in 50 kW Spoke-Type Interior Permanent Magnet Synchronous Motor with Ferrite Permanent Magnets for Automotive Applications Reviewed

Wataru Kakihara, Masatsugu Takemoto, Satoshi Ogasawara

2013 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE) 606 - 613 2013

Measurement of Resistance Characteristics of Power Cables in the Very High Frequency Band for Improving Electromagnetic Interference Analysis Reviewed

Yutaro Fujimori, Satoshi Ogasawara, Masatsugu Takemoto

2013 1ST INTERNATIONAL FUTURE ENERGY ELECTRONICS CONFERENCE (IFEEC 2013) 903 - 908 2013

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Papers - TAKEMOTO Masatsugu