ELECTROMAGNETIC FIELD ANALYSIS DEVICE, ELECTROMAGNETIC FIELD ANALYSIS METHOD, AND PROGRAM

To reduce computation load and prevent degradation in computation accuracy when deriving magnetic properties, including flux density, of an excited magnetic material through numerical analysis.SOLUTION: An electromagnetic field analysis device 100 is configured to; derive a flux density distribution...

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Bibliographic Details
Main Author HOMMA TSUTOMU
Format Patent
LanguageEnglish
Japanese
Published 26.12.2019
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Summary:To reduce computation load and prevent degradation in computation accuracy when deriving magnetic properties, including flux density, of an excited magnetic material through numerical analysis.SOLUTION: An electromagnetic field analysis device 100 is configured to; derive a flux density distribution in a magnetic steel sheet in a z-axis direction by solving a flux density diffusion equation expressed in terms of differential permeability at each time step t; and derive a differential permeability distribution in the magnetic steel sheet in the z-axis direction using the flux density distribution of the magnetic steel sheet in the z-axis direction. The electromagnetic analysis device 100 uses the differential permeability distribution in the magnetic steel sheet in the z-axis direction derived in a previous time step t to solve the flux density diffusion equation in the present time step t.SELECTED DRAWING: Figure 1 【課題】 励磁された磁性材料の磁束密度を含む磁気特性を数値解析により求めるに際し、計算負荷を低減することと計算精度の低下を抑制することとの双方を実現する。【解決手段】 電磁場解析装置100は、各時刻ステップtにおいて、微分透磁率を用いて表現される磁束密度の拡散方程式を解くことによって、電磁鋼板の磁束密度のz軸方向の分布を求めることと、当該電磁鋼板の磁束密度のz軸方向の分布を用いて、電磁鋼板の微分透磁率のz軸方向の分布を導出することとを行う。このとき、電磁場解析装置100は、1つ前の時刻ステップtにおいて導出した電磁鋼板の微分透磁率のz軸方向の分布を用いて、今回の時刻ステップtにおける磁束密度の拡散方程式を解く。【選択図】 図1
Bibliography:Application Number: JP20180115970