| Project/Area Number |
11695051
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| Research Category |
Grant-in-Aid for Scientific Research (B).
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
電力工学・電気機器工学
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| Research Institution | OKAYAMA UNIVERSITY |
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Principal Investigator |
TAKAHASHI Norio OKAYAMA UNIVERSITY, DEPARTMENT OF ELECTRICAL AND ELECTRONIC ENGINEERING, PROFESSOR, 工学部, 教授 (40108121)
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| Co-Investigator(Kenkyū-buntansha) |
FUJIWARA Koji OKAYAMA UNIVERSITY, DEPARTMENT OF ELECTRICAL AND ELECTRONIC ENGINEERING, ASSOCIATE PROFESSOR, 工学部, 助教授 (20190093)
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| Project Period (FY) |
1999 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2000: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1999: ¥1,700,000 (Direct Cost: ¥1,700,000)
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| Keywords | magnetic field analysis / finite element method / integral equation method / electrical and electronic machines |
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| Research Abstract |
In order to utilize the magnetic field analysis in the practical design, methods for improving the quality of magnetic field analysis using the finite element method and the integral equation method are investigated, and the application to the design of electrical and electronic machines are examined. The results obtained are summarized as follows :
1. Improvement of Quality of Magnetic Field Analysis
The edge - based finite element software, with high accuracy and short CPU time has been developed. The accuracy of the integral equation method is improved and the CPU time is reduced by examining the treatment of iron edge and the selection of unknown variable.
2. Verification of Magnetic Field Analysis
3-D eddy currents, electromagnetic forces and iron losses of standard models of TEAM International Workshop are compared, and the problems in the numerical analysis are examined. It is pointed out that the hysteresis loss in the steel plate cannot be neglected in some cases due to the skin effect.
3. Problems in Applying to Design of Electrical Machines
It is shown that the nonconforming mesh is useful in treating the rotation, and the de steady state analysis method is effective in the combined analysis with motion.
4. Measurement of Magnetic Properties at High Flux Density and Low Frequency
The operating flux density of recent machines is sometimes up to 2T in order to design compact and highly - efficient machines. Then, the behavior of magnetic properties under rotating flux at high flux density is clarified by utilizing a newly - developed closed magnetic path type of single sheet tester with double excitations.
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