DEVICE, METHOD, AND PROGRAM FOR ELECTROMAGNETIC FIELD ANALYSIS
PROBLEM TO BE SOLVED: To derive an electromagnetic flux density and a magnetic field density with a high accuracy even when a harmonic wave is superposed on the electromagnetic flux density.SOLUTION: An electromagnetic field analysis device 500 derives a magnetic flux density vector of an iron core...
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Sprache: | eng ; jpn |
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Zusammenfassung: | PROBLEM TO BE SOLVED: To derive an electromagnetic flux density and a magnetic field density with a high accuracy even when a harmonic wave is superposed on the electromagnetic flux density.SOLUTION: An electromagnetic field analysis device 500 derives a magnetic flux density vector of an iron core (core) which is an analysis object of the electromagnetic field by a numerical value analysis, and derives the maximum value Bof the size of the magnetic flux density from the derived magnetic flux density vector. Next, the electromagnetic field analysis device 500 reads an eddy current loss coefficient characteristic corresponding to a material attribute and an exciting fundamental frequency. In the read eddy current loss coefficient characteristic, an abnormal eddy current loss coefficient κ corresponding to the maximum value Bof the magnetic flux density vector is derived. Next, the electromagnetic field analysis device 500 derives a correction conductivity σ correcting the conductivity σ of an electromagnetic steel plate using the abnormal eddy current loss coefficient κ and derives the magnetic flux density vector and the eddy current vector of the iron core which are analysis objects of the electromagnetic field by the numerical analysis using the correction conductivity σ.SELECTED DRAWING: Figure 5
【課題】 磁束密度に高調波が重畳される場合でも磁束密度および磁界強度を精度よく導出する。【解決手段】 電磁場解析装置500は、電磁場の解析対象である鉄心(コア)の磁束密度ベクトルを数値解析により導出し、導出した磁束密度ベクトルから磁束密度の大きさの最大値Bmを導出する。次に、電磁場解析装置500は、材料属性と励磁基本周波数とに対応する渦電流損係数特性を読み出し、読み出した渦電流損係数特性において、磁束密度ベクトルの最大値Bmに対応する異常渦電流損係数κを導出する。次に、電磁場解析装置500は、異常渦電流損係数κを用いて電磁鋼板の導電率σを補正した補正導電率σ´を導出し、補正導電率σ´を用いて、電磁場の解析対象である鉄心の磁束密度ベクトルおよび渦電流ベクトルを数値解析により導出する。【選択図】 図5 |
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