ELECTROMAGNETIC FIELD ANALYSIS DEVICE, ELECTROMAGNETIC FIELD ANALYSIS METHOD AND PROGRAM

PROBLEM TO BE SOLVED: To perform analysis of an electromagnetic field with high accuracy in the case where an AC magnetic field is applied.SOLUTION: An eddy current loss Wis represented by a value that is obtained by multiplying a classical eddy current value Wby an abnormal eddy current loss coefficient κ, and an abnormal eddy current loss Wis represented by a value obtained by subtracting the classical eddy current loss Wfrom the eddy current loss W. A value obtained by adding a magnitude of a magnetic field vector based on the abnormal eddy current loss Wto a magnitude Hof a magnetic field vector in a DC magnetic hysteresis property is defined as a magnitude Hof the magnetic field vector after correction. The magnitude Hof the magnetic field vector after the correction corresponding to a magnetic flux density vector of which the peak value, the frequency and the waveform are designated is derived in each time step and a relationship thereof is defined as a corrected DC magnetic hysteresis property. The corrected DC magnetic hysteresis property is used to identify a play hysteresis model, a magnetic flux density vector obtained as a result of analysis of an electromagnetic field is given to the play hysteresis model and a hysteresis loss is computed.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する。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し、電磁場の解析の結果として得られる磁束密度ベクトルをプレイヒステリシスモデルに与えてヒステリシス損を計算する。【選択図】 図１