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電氣學會論文誌. The Transactions of the Institute of Elec... 2건

  1. [해외논문]   A Novel Magnetic Rotary Encoder for Servo Motors  

    Kabashima, Takefumi (Corpolate R&D Center, Yaskawa Electric Corporation ) , Arinaga, Yuji (Corpolate R&D Center, Yaskawa Electric Corporation ) , Uemura, Koji (Yaskawa Electric Corporation ) , Murokita, Ikuma (Corpolate R&D Center, Yaskawa Electric Corporation ) , Ohto, Motomichi (Corpolate R&D Center, Yaskawa Electric Corporation)
    電氣學會論文誌. The Transactions of the Institute of Electrical Engineers of Japan. D, A publication of industry applications society. D, 産業應用 v.126 no.9 ,pp. 1202 - 1207 , 2006 , 0913-6339 ,

    초록

    A new type of a magnetic rotary encoder for servomotors is proposed. A salient feature of the proposed encoder is its small size, high resolution, and simple construction. An encoder based on the proposed method having a width of 10mm, a height of 10mm, and a depth of 3mm was developed and is reported here. In addition, the developed encoder has a high resolution of 4096ppr and is capable of detecting absolute angular position. The proposed encoder comprises of a disc magnet magnetized in one direction with all the magnetic domains in the material parallel to each other, a stationary body made up of a magnetically soft material, and four Hall effect devices. This paper describes the configuration of the encoder and the proposed detection process of the rotational position. The characteristics of the prototype encoder are also presented. The accuracy of the encoder depends on the distortion of a pseudo-sinusoidal output waveform, and therefore for achieving high accuracy the distortion of the output waveform should be minimal. The magnetic flux distribution and the output waveform of the encoder were simulated using finite element method (FEM). Based on FEM analysis, the optimal shape of the disc magnet and its housing, relative position of the Hall effect devices and the material of the disc magnet were determined to achieve high performance characteristics.

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  2. [해외논문]   Performance Analysis of DC-DC Converter with MHz Band Transformer Employing Finite Element Method  

    Mitsutake, Yoshio (Advanced Technologies Development Labratory, Matsushita Electric Works, Ltd. ) , Hirata, Katsuhiro (Department of Adaptive Machine Systems, Graduate School of Engineering, Osaka University ) , Niwa, Kota (Department of Electric Engineering, Doshisha University ) , Ishihara, Yoshiyuki (Department of Electric Engineering, Doshisha University)
    電氣學會論文誌. The Transactions of the Institute of Electrical Engineers of Japan. D, A publication of industry applications society. D, 産業應用 v.126 no.9 ,pp. 1274 - 1278 , 2006 , 0913-6339 ,

    초록

    This paper presents the performance analysis method for the DC-DC converter with the MHz band transformer. In this method 3D electromagnetic field analysis employing finite element method (FEM), in which the displacement current is taken into consideration, is coupled with the circuit analysis. The performances of the transformer, such as input/output power and efficiency, are computed, and the validity of this method is confirmed through comparison of the computed and measured results. Furthermore the performances of a DC-DC converter with the transformer are calculated using the equivalent circuit of the transformer obtained from the results of FEM analysis. As the results, it is found that the calculated and measured input/output performances are in good agreement.

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    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

    이미지

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