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1995 Fiscal Year Final Research Report Summary

Efficient Use of Steels and Development of Low Loss Machines

Research Project

Project/Area Number 06045031
Research Category

Grant-in-Aid for international Scientific Research

Allocation TypeSingle-year Grants
SectionUniversity-to-University Cooperative Research
Research InstitutionOkayama University

Principal Investigator

NAKATA Takayoshi  Okayama University Faculty of Engineering Professor, 工学部, 教授 (50032925)

Co-Investigator(Kenkyū-buntansha) LING P.c.y  University of Wales College of Crdiff, Lecturer, ウォルフソン磁性材料研究所, 講師
MEYDAN T  University of Wales College of Crdiff, Lecturer, ウォルフソン磁性材料研究所, 講師
BASAK A.  University of Wales College of Craadiff, Lecturer, ウォルフソン磁性材料研究所, 講師
MOSES A.j  University of Wales College of Craadiff, Professor, ウォルフソン磁性材料研究所, 所長
MURAMATSU Kazuhiro  Okayama University, Faculty of Engineering Assistant Professor, 大学院・自然科学研究科, 助手 (30263627)
FUJIWARA Koji  Okayama University, Faculty of Engineering Associate Professor, 工学部, 助教授 (20190093)
TAKAHASHI Norio  Okayama University, Faculty of Engineering Professor, 工学部, 教授 (40108121)
Project Period (FY) 1994 – 1995
Keywordsnumerical analysis / measuring technique / nonlinear / anisotropic material / iron loss / low loss machine
Research Abstract

A method for calculating flux distrbutions in anisotropic materials and measuring technique of magnetic characteristics are investigated for the purpose of the development of low loss machines and making the efficient use of steel. The results obtained can be summarized as follows :
1. Development of Softwares for Analysis of Flux Distributions in Anisotropic Materials
(1) The functions Bx=fx (Hx, Hy), By=fy (Hx, Hy) are used for the magnetic characteristics of anisotropic materials.
(2) The convergence characteristics of nonlinear iteration and matrix solver are improved by using relaxation and over relaxation factors, respectively.
(3) The 3-D time periodic finite element method is developed for nonlinear steady state analysis.
2. Development of Measurement Method for Magnetic Characteristics in Anisotropic Materials
(1) Double yokes is used for measuring the magnetic characteristics in arbitrary directions of anisotropic materials.
(2) The effect of the waveforms of B and H on the measured B-H curves is investigated.
3. Development of Method for Estimating Iron Losses
The hybrid method which couples the calculation and the measurement is developed for loss estimation.
4. Verification of Software
The verification model is proposed, and results calculated using the developed method are in good agreement with measured results.
5. Applications
The developed analysis and measurement method are applied for the investigation of flux distribution in a reactor. The weight of the reactor is decreased while the efficiency is increased.

  • Research Products

    (81 results)

All Other

All Publications (81 results)

  • [Publications] 中田高義,村松和弘,高橋則雄,藤原耕二: "Practical Analysis of 3-D Dynamic Nonlinear Magnetic Field Using Time-Periodic Finite Element Method" IEEE Trans.on Magnetics. 31. 1416-1419 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 中田高義,高橋則雄,藤原耕二: "アモルファス金属薄帯用単板磁気試験器の検討-地磁気と残留磁気の影響-" 平7電気・情報関連学会中 国支部連合大会. 091606 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 中田高義,藤原耕二: ディジタル鉄損測定における問題点の検討. 第19回日本応用磁気学会 学術講演概要集. 23pB-2 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 中田高義,藤原耕二,村松和弘: アモルファス金属薄帯用横型単板磁気試験器の検討. 第19回日本応用磁気学会 学術講演概要集. 23pB-3 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A J Moses,T Meydan: "Influence of Grain Boundaries on Rotational Power Loss" Advanced Computational and Design Techniques in Applied Electromagnetic Systems. 679-682 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 高橋則雄,藤原耕二,中田高義: "Acceleration Technique of Waveform Control for Single Sheet Tester" IEEE Trans.on Magnetics. 31. 3400-3402 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 中田高義,高橋則雄,藤原耕二: "Effects of Impedances of Primary Winding and Mutual Inductor on Distortion of Flux Waveform in Single Sheet Tester" IEEE Trans.on Magnetics. 31. 3382-3384 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A J Moses,T Meydan: "A Computerised On-Iine Power Loss Testing System for the Steel Industry based on the RCP Compensation Technique" IEEE Trans.on Magnetics. 31. 3385-3387 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A Basak: "Magnetic flux and loss measurements using thin film sensors" IEEE Trans.on Magnetics. 31. 3170-3172 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A J Moses: "Effects of local grain structure on rotational losses in highly anisotropic electrical steel" Proceedings of ISEM Conference,Cardiff. C-37 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A Basak,A J Moses: "The effectiveness of anisotropic magnetic material modelling methods" Proceedings of ISEM Conference,Cardiff. D-44 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A J Moses,N Takahashi,T Nakata: "Effects of shape of samples of silicon-iron on the directions of magnetic field and flux density" Proceedings of ISEM Conference,Cardiff. E-53 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A Basak,A J Moses: "Flux distribution and loss in a100kVA3 phase wound amorphous transformer core" Proceedings of SMM Conference. 93 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 高橋則雄,村松和弘,中田高義,藤原耕二: "ヒステリシス及び過電流を考慮した三次元時間周期有限要素法による磁性体内の損失解析" 電気学会静止器研究会資料. 53-60 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 藤原耕二,中田高義: "Improvement of Convergence Characteristic of ICCG Method for A-φ Method Using Edge Element" IEEE Trans.on Magnetics. 32. (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 高橋則雄,中田高義,村松和弘: "3-D Time-Periodic Finite Element Analysis of Magnetic Field in Non-Oriented Materials Taking into Account Hysteresis Characteristics" Proceedings of the CEFC. (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A.Basak,T.Nakata,N.Takahashi: "Three Dimensional Computation of Force in a Novel Brushless DC Linear Motor" Proceedings of the CEFC. (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A.Basak,T.Nakata,N.Takahashi: "Optimisation of Permanent-Magnet Lifting Devices Using Finite Element Analysis" Proceedings of the CEFC. (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 中田高義,高橋則雄,藤原耕二: "Effects of Staircase Output Voltage Waveform of D/A Converter on Iron Losse Measured using H Coil" Journal of Magnetism and Magnetic Materials,. 135. (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 中田高義,藤原耕二,村松和弘: "Effect of Geomagnetism and Residual Magnetism on Single Sheet Testers for Amorphous Magnetic Material" Journal of Magnetism and Magnetic Materials,. 135. (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 中田高義,藤原耕二: "A Method for Separating Iron Loss into the Hysteresis and Eddy Current Losses Using Distorted Flux" Journal of Magnetism and Magnetic Materials,. 135. (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Nakata, N.Takahashi and K.Fujiwara: "Numerical Analysis of Flux Distributions in Cores Made of Anisotropic Materials (Invited)" Journal of Magnetism and Magnetic Materials. 133. 377-381 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Nakata, N.Takahashi and K.Fujiwara: "Study on Horizontal-Type Single Sheet Testers" Journal of Magnetism and Magnetic Materials. 133. 416-418 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A.J.Moses: "A Method of Modelling the Anisotrootropy of Electrotechnical Steels in the Finite Element Method" Journal of Magnetism and Magnetic Materials. 133. (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A.J.Moses: "Evaluation of Novel Transformer Cores" Journal of Magnetism and Magnetic Materials. 133. (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A.J.Moses and T.Meydan: "Influence of Grain Boundaries on Roatational Power Loss" Journal of Magnetism and Magnetic Materials. 133. (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A.J.Moses and T.Meydan: "Dew Point Measurement in the Decarburising of Electrical Steels" Journal of Magnetism and Magnetic Materials. 133. (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A.Basak: "Core Loss Computation of an 100kVA Distribution Transformer" Journal of Magnetism and Magnetic Materials. 133. (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Nakata, N.Takahashi and K.Fujiwara: "3-D Magnetic Field Analysis of Epstein Frame for Measuring Magnetic Characteristics" Proceedings of the 2nd International Workshop on Electric and Magnetic Fields from Numerical Models to Industrial Applications. 71 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Nakata, N.Takahashi and K.Fujiwara: "Analysis of 3-D Stray-Field Loss Model Problem 21" Proceedings of the 13th Japan Simulation and Technology Conference. 1-6. 23-26 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Fujiwara and T.Nakata: "Automatic Determination of Acceleration Factor for the ICCG Method" Proceedings of the CEFC Conference. No.PIA02. (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Takahashi, T.Nakata, and K.Fujiwara: "Analysis of Flux and Eddy Current Distributions of 3-D Stray-Field Loss Model (Problem 21)" Proceedings of the Aix-les-Bains Workshop. 21-24 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Nakata, N.Takahashi and K.Fujiwara: "An Improved Numerical Analysis of Flux Distributions in Anisotropic Materials" IEEE Trans.on Magnetics. 30. 3395-3398 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A.J.Moses and A.Basak: "A Method of Anisotropic Steel Modelling Using FEM with Confirmation by Experimental Results" IEEE Trans.on Magnetics. 30. (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A.Basak: "Efficient Transformer Design by Computing Core Loss using a Novel Approach" IEEE Trans.on Magnetics. 30. (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Meydan: "The Effect of Surface Layrs on Powre Loss in Amorphous Ribbons" IEEE Trans.on Magnetics. 30. (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Meydan: "Influence of Scratching on Domain Structure and Power Loss Amorphous Ribbons" IEEE Trans.on Magnetic. 30. (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Meydan: "Variation of the Local Flux Densities in the Amorphous Transducer Toroidal Cores" IEEE Trans.on Magnetics. 30. (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Fujiwara and T.Nakata: "Measurement of Magnetic Characteristics of Permalloy for Magnetically Shielded Room" Digests of The 19th Annual Conference on Magnetics in Japan. No.12pE-9. (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Nakata: "Improved Controlling Method of Waveform for Single Sheet Tester" Digests of The 19th Annual Conference on Magnetics in Japan. No.12a B-4. (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Nakata: "Influence of Constructions of Exciting Winding for Shingle Sheet Tester on Distortion of Waveform" Digests of The 19th Annual Conference on Magnetics in Japan. No.12B-5. (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Nakata and K.Fujiwara: "Flux Distributions in Wound Cores" Proceedings of the AUPEC. 1. 31-36 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Nakata: "Development of General and Automatic Measurement System" Combined Conference of the Tyugoku Area of Electrical and Information Related Institution of Japan. No.09040. (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Nakata: "Investigations of Problem on Loss Estimation" Combined Conference of the Tyugoku Area of Electrical and Information Related Institution of Japan. No.090407. (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Fujiwara and T.Nakata: "Investigation of Non-zero Entries Distributions in Co-efficient Matrix for ICCG Method" Combined Conference of the Tyugoku Area of Electrical and Information Related Institution of Japan. No.090403. (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Nakata, N.Takahashi: "Magnetostriction Measurements with a Laser Doppler Velocimeter" IEEE Trans.on Magnetics. 30. 4563-4565 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Fujiwara, N.Takahashi and T.Nakata: "Effect of Gauge Condition for Edge Element on Convergence Characteristic of ICCG Method" International Journal of Applied Electromagnetics in Materials. 6. 259-262 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Takahashi, K.Fujiwara and T.Nakata: "Analysis of 3-D Stray Field Loss Model (Problem 21) using Time-Periodic FEM with Edge Elements" National Convention Record IEEJ. No.1076. (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Fujiwara and T.Nakata: "Convergence Characteristic of the ICCG Method in Finite Element Software Using A-f Method and Edge Element" National Convention Record IEEJ. No.1070. (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Fujiwara and T.Nakata: "Experimental Study of Measurement Accuracy in Loss Estimation Method" National Convention Record IEEJ. No.494. (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Fujiwara and T.Nakata: "Investigation on Simple Iterative Method for Nonlinear Magnetic Field Analysis" National Convention Record IEEJ. No.1071. (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Nakata: "Yoke Construction of Single Sheet Tester for Amorphous Metal" National Convention Record IEEJ. No.472. (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Takahashi and T.Nakata: "Magnetic Characteristics of Amorphous Metal at Low Temperature" National Convention Record IEEJ. No.471. (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Fujiwara T.Nakata and N.Takahashi: "On the Continuity of the Magnetizing Currcnt Density in 3-D Magnetic Field Analysis with Edge Element" IEEE Trans.on Magnetics. 31. 1364-1367 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Nakata, N.Takahashi and K.Fujiwara: "Practical Analysis of 3-D Dynamic Nonlinear Magnetic Field Using Time-Periodic Finite Element Method" IEEE Trans.on Magnetics. 31. 1416-1419 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Takahashi, K.Fujiwara and T.Nakata: "Nonlinear Transient Analysis of Electric Field Coupled with Temperature in Joint of Power Cable" IEEE Trans.on Magnetics. 31. 1900-1903 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Fujiwara T.Nakata: "Comparison of Various Kinds of Edge Elements for Electromagnetic Field Analysis" Proceedings of the Compumag Conference. (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Fujiwara T.Nakata: "Improvement of Covergence characteristic of ICCG Method for A-phi Method Using Edge Element" Proccedings of the Compumag Conference. (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Takahashi, T.Nakata and K.Fujiwara: "Effects of Impedances of Primary Winding and Mutual Inductor on Distortion of Flux Waveform in Single Sheet Tester" Proceedings of the Intermag Conference.(1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Takahashi, K.Fujiwara T.Nakata: "Acceleration Technique of Waveform Control for Single Sheet Tesrer" Proceedings of the Intermag Conference. (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Nakata, N.Takahashi, , K.Fujiwara and K.Muramatsu: "Practical Analysis of 3-D Dynamic Nonlinear Magnetic Field Using Time-Periodic Finite Element metohd" IEEE Trans.on Magnetics. 31. 1416-1419 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Nakata, N.Takahashi and K.Fujiwara: "Effects of Geomagnetism and Residual Magnetism on a Single Sheet Tester for Amorphous Metal" Combined Conference of the Tyugoku Area of Electrical and Information Related Institution of Japan. No.091606. (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Nakata and K.Fujiwara: "Study of Problems in Iron Loss Measurement Using Digital Technique" Digests of The 19th Annual Conference on Magnetics in Japan. No.23pB-2.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Nakata, K.Fujiwara and K.Muramatsu: "Effects of Geomagnetism and Residual Magnetism on a Horizontal Type of Single Sheet Tester for Amorphous Magnetic Materials" Digests of The 19th Annual Conference on Magnetics in Japan. No.23pB-3. (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A J Moses and Meydan: "Influence of Grain Boundaries on Roatational Power Loss" Advanced Computational and Design Techniques in Applied Electromagnetic Systems. 679-682 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Takahashi, K.Fujiwara and T.Nakata: "Acceleration Technique of Waveform Control for Single Sheet Tester" IEEE Trans.on Magnetics. 31. 3400-3402 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Nakata, N.Takahashi and K.Fujiwara: "Effects of Impedances of Primary Winding and Matual Inductor on Distortion of Flux Waeform in Single Sheet Tester" IEEE Trans.on Magnetics. 31. 3382-3384 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A J Moses and T Meydan: "A Computerised On-line Power Loss Testing System for the Steel Industry based on the RCP Compensation Technique" IEEE Trans.on Magnetics. 31. 3325-3387 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A Basak: "Magnetic flux and loss measurements using thin film sensors" IEEE Trans.on Magnetics. 31. 3170-3172 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A J Moses: "Effects of local grain structure on rotational losses in highly anisotropic electrical steel" Proceedings of ISEM Conference. C-37 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A Basak and A J Moses: "The effectiveness of anisotropic magnetic material modelling methods" Proceedings of ISEM Conference. No.D-44. (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A J Moses, N Takahashi and T Nakata: "Effect of shape of samples of silicon-iron on the directions of magnetic field and flux density" Proceedings of ISEM Conference. E-53 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A Basak and A J Moses: "Flux distribution and loss in a 100kVA 3 phase wound amorphous transformer core" Proceedings of SMM Conference. E93 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Takahashi, T.Nakata, K.Fujiwara and K.Muramatsu: "Analysis of Losses in Magnetic Materials Taking into account Hysteresis and Eddy Currents by 3-D Time-Periodic FEM" IEEJ,Stationary Appliance Research Report. 53-60 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Fujiwara and T.Nakata: "Improvement of Convergence Characteristic of ICCG Method for A-f Method Using Edge Element" IEEE Trans.on Magnetics. 32. (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Takahashi, T.Nakata, K.Fujiwara and K.Muramatsu: "3-D Time-Periodic Finite Element Analysis of Magnetic Field in Non-Oriented Materials Taking into Account Hysteresis" Proceedings of the CEFC. (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A.Basak, T.Nakata and N.Takahashi: "Three Dimensional Computation of Force in a Novel Brushless DC" Proceedings of the CEFC. (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A.Basak, T.Nakata and N.Takahashi: "Optimisation of Permanent-Magnet Lifting Devices Using Finite Element Analysis" Proceedings of the CEFC. (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Nakata, N.Takahashi and K.Fujiwara: "Effect of Staircase Output Voltage Waveform of D/A Converter on Iron Losses Measured using H Coil" Journal of Magnetism and Magnetic Materials. 135. (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Nakata, K.Fujiwara and K.Muramatsu: "Effects of Geomagnetism and Residual Magnetism on Single Sheet Testers for Amorphous Magnetic Material" Journal of Magnetism and Magnetic Materials. 135. (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Nakata and K.Fujiwara: "A Method for Separating Iron Loss into the Hysteresis and Eddy Current Losses Using Distorted Flux" Journal of Magnetism and Magnetic Materials. 135. (1996)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1997-03-04  

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