DEVICE, METHOD, AND PROGRAM FOR ELECTROMAGNETIC FIELD ANALYSIS

PROBLEM TO BE SOLVED: To perform an analysis of the electro-magnetic field with high accuracy in the case that an AC magnetic field is applied.SOLUTION: An eddy current loss We is expressed with a value multiplying an abnormal eddy current loss factor κ by a classical eddy current loss factor W, and...

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1. Verfasser: WAJIMA KIYOSHI
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:PROBLEM TO BE SOLVED: To perform an analysis of the electro-magnetic field with high accuracy in the case that an AC magnetic field is applied.SOLUTION: An eddy current loss We is expressed with a value multiplying an abnormal eddy current loss factor κ by a classical eddy current loss factor W, and the abnormal eddy current loss Wis expressed with a value reducing a classical eddy current loss Wfrom the eddy current loss W. A value adding a magnitude of a magnetic field vector based on this abnormal eddy current loss Wto a magnitude Hof the magnetic field in a direct current magnetic hysteresis characteristic is defined as a magnitude H. The magnitude Hof the magnetic field vector after correction corresponding to a magnetic flux density vector where a wave height value, a frequency, and a waveform are designated is derived in each time step, and the relationship among these elements is prepared as a correction direct current magnetic hysteresis characteristic, and a pre-hysteresis mode is identified (constructed) so as to be provided for the analysis of the electromagnetic field using this correction direct current magnetic hysteresis characteristic.SELECTED DRAWING: Figure 1 【課題】 交流磁界が印加される場合の電磁場の解析を高精度に行う。【解決手段】 異常渦電流損係数κを古典的渦電流損We0に乗じた値で渦電流損Weを表現すると共に、渦電流損Weから古典的渦電流損We0を減じた値で異常渦電流損Weaを表現する。この異常渦電流損Weaに基づく磁界ベクトルの大きさを、直流磁気ヒステリシス特性における磁界ベクトルの大きさHhに加算した値を、補正後の磁界ベクトルの大きさHhaとする。波高値、周波数、および波形が指定された磁束密度ベクトルに対応する補正後の磁界ベクトルの大きさHhaを、各時間ステップにおいて導出し、それらの関係を補正直流磁気ヒステリシス特性として作成する。そして、この補正直流磁気ヒステリシス特性を使って、プレイヒステリシスモデルを同定(構築)し、電磁場の解析に供する。【選択図】 図1