The Experts below are selected from a list of 7758 Experts worldwide ranked by ideXlab platform
K. Arai - One of the best experts on this subject based on the ideXlab platform.
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A new concept silicon homojunction infrared sensor
IEEE Transactions on Electron Devices, 1991Co-Authors: S. Tohyama, N. Teranishi, K. Konuma, M. Nishimura, K. AraiAbstract:A new silicon photovoltaic infrared sensor is proposed. Its basic Operational Principle is demonstrated. The sensor consists of three regions with a homojunction structure, having a flexibly designed barrier height corresponding to the cutoff wavelength. The operation of the sensor is based on infrared absorption and internal photoemission by free electrons in a conduction band in degenerate n/sup ++/-type silicon. The fabricated sensors have verified the basic Operational Principle and have shown that the detectable wavelength range extends to over 12 mu m.
Noboru Niguchi - One of the best experts on this subject based on the ideXlab platform.
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Design and Analysis of Torque Superimposition Magnetic-Geared Motor
2019 19th International Symposium on Electromagnetic Fields in Mechatronics Electrical and Electronic Engineering (ISEF), 2019Co-Authors: Hajime Ukaji, Katsuhiro Hirata, Noboru NiguchiAbstract:This paper proposes a novel magnetic-geared motor which is superior to conventional magnetic-geared motors in terms of torque characteristics. The basic structure and Operational Principle of the proposed magnetic-geared motor are described. Finally, the torque-current characteristics are computed by using finite element analysis.
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Characteristic Analysis of Surface Permanent-Magnet Vernier Motor According to Pole Ratio and Winding Pole Number
IEEE Transactions on Magnetics, 2017Co-Authors: Shi Hyoseok, Noboru Niguchi, Katsuhiro HirataAbstract:This paper aims to analyze the characteristics of a surface permanent-magnet Vernier motor (SPMVM) according to the pole ratio among the rotor magnet pole pairs, stator teeth, and winding pole number. The SPMVM has the same Operational Principle as a magnetic gear, and it is operated using the space harmonics of the air-gap flux density due to the magnetomotive force and air-gap permeance. In this paper, first, the design parameters of the SPMVM are specified based on an analytical calculation of the air-gap magnetic flux density. Moreover, various combinations of the rotor magnet pole pairs and stator teeth number are made and compared according to the Operational Principle of a Vernier motor using a 2-D finite-element method.
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high performance hybrid type magnetic planetary gear
International Conference on Mechatronics and Automation, 2013Co-Authors: Noboru Niguchi, Katsuhiro Hirata, Masahiko SakaiAbstract:This paper proposes a high performance hybridtype magnetic planetary gear. The Operational Principle of the star, planetary, and solar types is described and the transmission torque characteristics are simulated by using 3-D finite element method. Finally, the simulated torque characteristics are verified by carrying out measurements on a prototype.
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Proposal of an axial-type magnetic-geared motor
2012 XXth International Conference on Electrical Machines, 2012Co-Authors: Noboru Niguchi, Katsuhiro Hirata, Ariff Zaini, Shingo NagaiAbstract:This paper proposes an axial-type magnetic-geared motor with permanent magnets only on the high-speed rotor. The Operational Principle and design technique utilizing the inherent overload protection are described. Finally, the torque-speed characteristics are computed by using 3-D finite element method analysis.
Katsuhiro Hirata - One of the best experts on this subject based on the ideXlab platform.
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Design and Analysis of Torque Superimposition Magnetic-Geared Motor
2019 19th International Symposium on Electromagnetic Fields in Mechatronics Electrical and Electronic Engineering (ISEF), 2019Co-Authors: Hajime Ukaji, Katsuhiro Hirata, Noboru NiguchiAbstract:This paper proposes a novel magnetic-geared motor which is superior to conventional magnetic-geared motors in terms of torque characteristics. The basic structure and Operational Principle of the proposed magnetic-geared motor are described. Finally, the torque-current characteristics are computed by using finite element analysis.
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Characteristic Analysis of Surface Permanent-Magnet Vernier Motor According to Pole Ratio and Winding Pole Number
IEEE Transactions on Magnetics, 2017Co-Authors: Shi Hyoseok, Noboru Niguchi, Katsuhiro HirataAbstract:This paper aims to analyze the characteristics of a surface permanent-magnet Vernier motor (SPMVM) according to the pole ratio among the rotor magnet pole pairs, stator teeth, and winding pole number. The SPMVM has the same Operational Principle as a magnetic gear, and it is operated using the space harmonics of the air-gap flux density due to the magnetomotive force and air-gap permeance. In this paper, first, the design parameters of the SPMVM are specified based on an analytical calculation of the air-gap magnetic flux density. Moreover, various combinations of the rotor magnet pole pairs and stator teeth number are made and compared according to the Operational Principle of a Vernier motor using a 2-D finite-element method.
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high performance hybrid type magnetic planetary gear
International Conference on Mechatronics and Automation, 2013Co-Authors: Noboru Niguchi, Katsuhiro Hirata, Masahiko SakaiAbstract:This paper proposes a high performance hybridtype magnetic planetary gear. The Operational Principle of the star, planetary, and solar types is described and the transmission torque characteristics are simulated by using 3-D finite element method. Finally, the simulated torque characteristics are verified by carrying out measurements on a prototype.
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Proposal of an axial-type magnetic-geared motor
2012 XXth International Conference on Electrical Machines, 2012Co-Authors: Noboru Niguchi, Katsuhiro Hirata, Ariff Zaini, Shingo NagaiAbstract:This paper proposes an axial-type magnetic-geared motor with permanent magnets only on the high-speed rotor. The Operational Principle and design technique utilizing the inherent overload protection are described. Finally, the torque-speed characteristics are computed by using 3-D finite element method analysis.
S. Tohyama - One of the best experts on this subject based on the ideXlab platform.
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A new concept silicon homojunction infrared sensor
IEEE Transactions on Electron Devices, 1991Co-Authors: S. Tohyama, N. Teranishi, K. Konuma, M. Nishimura, K. AraiAbstract:A new silicon photovoltaic infrared sensor is proposed. Its basic Operational Principle is demonstrated. The sensor consists of three regions with a homojunction structure, having a flexibly designed barrier height corresponding to the cutoff wavelength. The operation of the sensor is based on infrared absorption and internal photoemission by free electrons in a conduction band in degenerate n/sup ++/-type silicon. The fabricated sensors have verified the basic Operational Principle and have shown that the detectable wavelength range extends to over 12 mu m.
M B Schubert - One of the best experts on this subject based on the ideXlab platform.
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the Operational Principle of a new amorphous silicon based p i i n color detector
Journal of Applied Physics, 1997Co-Authors: R Bruggemann, T Neidlinger, M B SchubertAbstract:The Operational Principle of a new type p-i-i-n color sensor is described with the aid of numerical modeling. The modeling results account for the color detection mechanism recently presented that this kind of structure exhibits [T. Neidlinger, M. B. Schubert, G. Schmid, and H. Brummack, in Amorphous Silicon Technology—1996, edited by E. A. Schiff et al. (Materials Research Society, Pittsburgh, 1996), p. 147]. By band gap engineering the experimental red response is maximized at larger reverse bias voltage whereas the green response has its maximum at low reverse bias voltage. The numerical modeling qualitatively reproduces the characteristic shape of the steady-state current-voltage curves at different illumination wavelengths. At low and at high reverse bias voltages the influence of the internal variables and parameters is identified and leads to the experimentally observed response. The potential profile of the p-i-i-n structure is of crucial importance to the color detection mechanism. At larger wave...
