錳鋅鐵氧磁體磁熱耦合問題之分析

An Analysis of Magneto-Thermal Coupled Problem on a Mn-Zn Ferrite

陳其亮(Chi-Liang Chen)

指導教授 ： 許政行

中原大學/工學院/機械工程研究所/碩士(2001年)

https://doi.org/10.6840/cycu200100297

摘要

本文研究錳鋅鐵氧磁體在一電磁場中與由熱場導致不穩定電磁性質時的磁熱耦合問題(magneto-thermal problem)，一電子元件在使用時其能量的損失都直接變成熱而耗散掉而且還會使得工作溫度升高，此熱能的耗散是由材料的磁損、介電損與渦流損所引起。本文使用有限差分法對電磁場及熱場耦合的數學方程式進行求解，製作樣品後進行量測的結果顯示模擬計算的損失值在考慮熱效應的情形下與實驗值具有一致性。

關鍵字

有限差分法 ； 磁熱耦合問題 ； 介電損 ； 渦流損 ； 磁損

並列摘要

The present study treats a coupled magneto-thermal problem of the electromagnetic field and unsteady state electromagnetic properties with a heat equation in a Mn-Zn ferrite. The power consumed by electrical components is directly converted into heat and causes a rise in the operating temperature. The heat dissipation is caused by the magnetic, dielectric and eddy current losses. A finite difference method was used to obtain solutions of the coupled mathematical equations of electromagnetic and thermal fields. Measurements of samples were also presented in this study. The results show a good agreement of the trend of the heat effect on losses between simulation and experiments.

並列關鍵字

eddy current loss ； magnetic loss ； dielectric loss ； finite difference method ； magneto-thermal problem

參考文獻

1. Stanley H. Charap, Physics of Magnetism, JOHN WILEY & SONS, INC., 1986

2. Derk Craik, Magnetism: Principle and Applications, JOHN WILEY & SONS, INC., 1995

4. E C Snelling, Soft Ferrites: Properties and Applications, second edition, Butterworths Ltd., 1988

8. N. J. Shaw, Densification and Coarsening During Solid State Sintering of Ceramics: A Review of the Models, Powder Metallurgy International vol.21, No.3, pp. 16-21, 1989

11. Seiya Ogawa, Oxidation Rate and Phase Diagram of Mn-Zn Ferrite Determined from the Cation Diffusion Coefficient, Japanese Journal of Applied Physics, vol.6, No.12, Dec., pp.1427-1433, 1967