非線形特性を考慮した交流磁気特性測定回路条件

概要

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The magnetic properties of the magnetic core under ac excition are dependent on the magnetizing conditions. In order to obtain reproducible magnetic properties, it is necessary to use measurement circuit which satisfy magnetizing conditions. This paper describes the circuit conditions for measurement of magnetic properties of the magnetic core under sinusoidal flux wave-form condition considering nonlinearity of the magnetization characteristics and eddy current. In carrying out the analysis, harmonic balance method in which magnetization characteristics are approximated by a Fourier-series and it is assumed that the eddy current factor is proportional to the rate of change of the flux was adopted. From the results obtaind by numerical analysis, the influence of circuit constants and magnetization characteristics for the flux wave-form is shown. Circuit conditions which satisfy sinusoidal flux wave-form condition are also obtained. The results of the analysis were confirmed by the experiments.
社団法人電気学会の論文
2003-09-01