Faculty Profiles - TAKEMOTO Masatsugu

MISC - TAKEMOTO Masatsugu

Division display 61 - 80 of about 333 ／ All the affair displays >>

A Circuit Simulation Model of Single-Phase Common-Mode Inductor with Considering Complex Permeability of Magnetic Material

高橋翔太郎, 小笠原悟司, 竹本真紹, 折川幸司

電気学会研究会資料 2019 ( 142 ) 1 - 6 2019.11

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

仲沢龍翔, 竹本真紹, 小笠原悟司, 折川幸司

MAGDAコンファレンス講演論文集 28th 6‐11 2019.10

Investigation of development policy of SMC material for high efficiency over a wide operating range in axial gap motors having coreless rotor structure

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

MAGDAコンファレンス講演論文集 28th 34‐41 2019.10

A Proposal of Ultra‐Flat Axial Gap Motor Employing C‐type SMC Core

綱田錬, 竹本真紹, 小笠原悟司, 折川幸司

電気学会研究会資料 ( RM-19-056-066/LD-19-055-065/HCA-19-033-043 ) 63‐68 - 879 2019.8

Language：Japanese Publisher：IEEE

In recent years, permanent magnet synchronous motors (PMSMs) are used for many applications because of their high output density and high efficiency. On the other hand, PMSMs having low aspect ratio like flat disk are desired depending on applications. In general, PMSMs employ radial gap structure which has the air gap in radial direction. However, in flat shape, radial gap motors have relatively low torque because their effective surface area of permanent magnet (PM) is small and their coil ends occupy most of the motor volume. Therefore, in flat shape, axial gap structure which has the air gap in axial direction is frequently employed instead of radial gap motors. Since axial gap motors don't have the coil ends in axial direction, they can reduce axial length. Meanwhile, conventional axial gap motors frequently employ double stator structure. Hence, in flatter shape like 'ultra-flat shape', conventional axial gap motors are not suitable because stator back yoke and PM become extremely thin. Instead of those, an axial gap motor employing C-type SMC core is proposed in this paper. Advantages of the proposed axial gap motor using C-type core in ultra-flat shape is illustrated, and then, the proposed motor is analyzed by three-dimensional finite element analysis (3D-FEA).

Web of Science

J-GLOBAL

researchmap

Examination to Enhance Efficiency of IPMSM Using Concentrated Winding Structure at Wide Operating Area

TAO Xianji, 竹本真紹, 小笠原悟司, 折川幸司

電気学会研究会資料 ( RM-19-067-074/LD-19-066-073/HCA-19-044-051 ) 21‐27 2019.8

Examination of Enhancing Power Density in Ultra‐High‐Speed Motors with Concentrated Winding

飯田貴之, 竹本真紹, 小笠原悟司, 折川幸司, 佐藤以久也, 國分博之, 鳥羽章夫, 首藤雅夫

電気学会研究会資料 ( MD-19-073-079/RM-19-041-047/VT-19-001-007 ) 35‐40 - 269 2019.7

Language：Japanese Publisher：IEEE

Ultra-high-speed motors has frequently been considered for many applications because to increase rotational speed of motors is effective in improving output power density and reducing motor size. In this paper, a 4-pole ultra-high-speed motor with concentrated winding structure is discussed in order to achieve even higher output power density. However, applying 4-pole magnetization to conventional ultra-high-speed motors using Nd sintered permanent magnet (PM) and concentrated winding structure will extremely increase total loss, total loss density, and especially rotor loss density. Therefore, from the viewpoint of cooling and continuous operation, it is important to propose a 4-pole ultra-high-speed motor with concentrated winding structure that can achieve even higher power density without increasing the total loss density and the rotor loss density. This paper shows that there are four important key points in the motor design to realize the proposed motor. It is found that the proposed motor can accomplish 1.5 times higher output power density without increasing the total loss density and the rotor loss density than the conventional 2-pole ultra-high-speed motor with Nd sintered PM and concentrated winding structure.

Web of Science

J-GLOBAL

researchmap

パワーエレクトロニクス機器におけるノイズ電流ループについての基礎検討

高橋翔太郎, 小笠原悟司, 竹本真紹, 折川幸司, 玉手道雄

電気学会全国大会講演論文集(CD-ROM) 2019 ROMBUNNO.4‐152 2019.3

周波数逓倍MHz出力インバータにおけるマルチコアトランスの二次巻線電圧に関する検討

折川幸司, 小笠原悟司, 竹本真紹, 伊東淳一

電気学会全国大会講演論文集(CD-ROM) 2019 ROMBUNNO.4‐075 2019.3

Bridge‐less SEPICを用いたアクティブパワーデカップリング回路の電圧ストレス低減について

HWANG Soonhwan, 小笠原悟司, 折川幸司, 竹本真紹

電気学会全国大会講演論文集(CD-ROM) 2019 ROMBUNNO.4‐071 2019.3

Investigation of Reducing Eddy Current Loss in Rectangular Winding of High Power‐Density IPMSM Employing Concentrated Winding Stator

真鍋翔, 竹本真紹, 小笠原悟司, 折川幸司, 赤松陽介, 軸丸武弘, 鈴木史典

電気学会研究会資料 ( MD-19-061-072/HCA-19-001-012 ) 55‐60 2019.2

Design Method of EMI Filters Focusing on Weight in a Power Converter for Aircrafts

河原智彦, 小笠原悟司, 竹本真紹, 折川幸司, 福田剛, 山口浩二, 鈴木史典

電気学会研究会資料 ( SPC-19-021-030/MD-19-021-030 ) 1‐6 2019.1

An Examination on Reduction of Stray Capacitance for Inverter Main Circuit Using Multilayer Printed Circuit Boards

石川光亮, 小笠原悟司, 竹本真紹, 折川幸司

電気学会産業応用部門大会(CD-ROM) 2019 ROMBUNNO.1‐78 2019

Language：Japanese Publisher：IEEE

This paper deals with stray capacitance in an inverter main circuit on a printed circuit board (PCB), which affects switching characteristics in a voltage source inverter (VSI), and reduction of the stray capacitance. A simulation shows that switching speed is decreased by the stray capacitance on the inverter output electrode pattern. The design guidelines focusing on reduction of the stray capacitance are proposed. Further, based on the guidelines, a SiC-MOSFET VSI to reduce the stray capacitance is designed using a double-sided PCB with 35 mu m-thick standard copper foil. Experiments using SiC-MOSFET VSIs show that the inverter with the redesigned PCB shortens the switching time of the drain-source voltage by 10% for the rise time and by 38% for the fall time compared with an inverter based on our previous design guidelines. Hence, the switching loss is also reduced using the redesigned PCB inverter.

Web of Science

J-GLOBAL

researchmap

An Experimental Evaluation on the Relationship between Filter Inductor Impedances and Dimensional Resonances of Magnetic Cores

高橋翔太郎, 小笠原悟司, 竹本真紹, 折川幸司, 玉手道雄

電気学会産業応用部門大会(CD-ROM) 2019 ROMBUNNO.1‐43 2019

Simple Frequency Analysis of Conducted Noise in an Electromechanical Integrated Compressor

安原崇志, 高橋翔太郎, 小笠原悟司, 竹本真紹, 折川幸司, 小林孝次, 吉田浩, 柏原辰樹

電気学会産業応用部門大会(CD-ROM) 2019 ROMBUNNO.1‐90 2019

渦電流の抑制を目的としたトランス巻線構造の提案

菅野将太郎, 小笠原悟司, 折川幸司, 竹本真紹, 船渡寛人, 春名順之介, 岡崎文洋, 三原輝儀

電気学会産業応用部門大会(CD-ROM) 2019 ROMBUNNO.Y‐38 2019

An Isolated AC/DC Converter Using a Matrix Converter―A Control Method Considering a Non‐linearity of a Diode Rectifier―

小高渉, 小笠原悟司, 折川幸司, 竹本真紹, 兵頭貴志, 徳崎裕幸

電気学会産業応用部門大会(CD-ROM) 2019 ROMBUNNO.1‐38 - 1234 2019

Language：Japanese Publisher：IEEE

This paper introduces a matrix converter control method for an isolated AC/DC converter with a resonant circuit that considers non-linearity of the diode rectifier. The method achieves a high output frequency equals to the switching frequency, a constant DC output voltage, sinusoidal input currents, and unity input power factor. Furthermore, soft switching with maximum output power factor is realized by a frequency control. In this type of circuit, the harmonics of the matrix converter output current are caused by the non-linearity of the diode rectifier. A conventional method neglects these harmonics, which cause input current distortion and DC voltage ripple. In a proposed method, the control variables are numerically calculated considering the non-linearity of the diode rectifier and implemented in a lookup table. In addition, a DC voltage feedback is applied to compensate for the effects of parameter error, e.g., voltage drop of the power semiconductor device and deadtime of the MC. The proposed method is evaluated experimentally.

Web of Science

J-GLOBAL

researchmap

Study of Power Loss in High Frequency Output Inverter using Frequency Multiplying Circuit

折川幸司, 小笠原悟司, 竹本真紹, 伊東淳一

電気学会産業応用部門大会(CD-ROM) 2019 ROMBUNNO.1‐73 2019

A Hybrid Common‐noise Canceler Combining an Active Feedback Circuit for PWM Inverters

小原峻介, 小笠原悟司, 竹本真紹, 折川幸司, 山本融真

電気学会産業応用部門大会(CD-ROM) 2019 ROMBUNNO.1‐81 2019

Investigation of a Variable Flux Memory Motor Using Delta‐type PM Arrangement and Extended Flux Barrier for Traction Applications, Ver.1―Novel Rotor Structure to Improve Magnetization Characteristics―

綱田錬, 竹本真紹, 小笠原悟司

電気学会産業応用部門大会(CD-ROM) 2019 ROMBUNNO.3‐71 2019

Investigation of a Variable Flux Memory Motor Using Delta‐type PM Arrangement and Extended Flux Barrier for Traction Applications, Ver. 2―Operating Characteristics Under No‐load and Load Conditions―

綱田錬, 竹本真紹, 小笠原悟司

電気学会産業応用部門大会(CD-ROM) 2019 ROMBUNNO.3‐72 2019

　 PREV - NEXT 　

< TAKEMOTO Masatsugu >

MISC - TAKEMOTO Masatsugu