MAGNETIC PROPERTY ANALYSIS SYSTEM AND MAGNETIC PROPERTY ANALYSIS METHOD

PROBLEM TO BE SOLVED: To accurately derive hysteresis loss and eddy current loss of a magnetic material even when the density of a magnetic flux generated in the magnetic material is not a sine wave.SOLUTION: A waveform correction part 613 performs correcting an indication waveform of an excitation voltage according to the difference between a measured waveform and a target waveform of an induction voltage until the measured waveform of the induction voltage is converged to the target waveform. A convergence determination part 614 determines that the measured waveform of the induction voltage is converged to the target waveform when a value using an integrated value for one cycle of the absolute value of difference values at the time instances between the measured waveform and target waveform of the induction voltage is equal to or less than a reference value. An analysis part 116 obtains a magnetic flux density vector and an eddy current vector generated in a measurement sample S by applying, to an excitation coil 102, the indication waveform of the excitation voltage when the measured waveform of the induction voltage is converged to the target waveform, by executing three-dimensional numerical analysis based on Maxwell's equations.SELECTED DRAWING: Figure 6 【課題】 磁性材料に発生する磁束密度が正弦波でない場合でも当該磁性材料のヒステリシス損および渦電流損を高精度に導出する。【解決手段】 波形修正部６１３は、誘起電圧の測定波形と目標波形との差に応じて励磁電圧の指示波形を修正することを、誘起電圧の測定波形が目標波形に収束するまで行う。ここで、収束判定部６１４は、誘起電圧の測定波形と目標波形との各時刻における値の差の絶対値の、一周期分の積算値を用いた値が基準値以下である場合に、誘起電圧の測定波形が目標波形に収束したと判定する。そして、解析部１１６は、誘起電圧の測定波形が目標波形に収束しているときの励磁電圧の指示波形を励磁コイル１０２に印加することにより測定試料Ｓに発生する磁束密度ベクトルおよび渦電流ベクトルを、マックスウェルの方程式に基づく三次元数値解析を実行することにより求める。【選択図】 図６