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# Relative Permibility

## Relative Permibility Calculation

當一個磁性材料被置於磁場中時，它的磁化會導致磁場在材料內的強度增加，而相對磁導率則描述了這種增強程度。

相對磁導率是一個無單位的物理量，它通常定義為材料在磁場下的磁導率與真空中的磁導率之比。真空中的磁導率是一個恆定值，通常表示為μ0，而材料在磁場下的磁導率則可以通過實驗測量得到。

相對磁導率是磁性材料的一個重要特性，它可以影響磁性材料在電磁元件中的應用。在設計和製造磁性元件時，需要對材料的相對磁導率進行詳細的測試和分析，以確保元件的性能和可靠性。相對磁導率的值可以通過測量材料在磁場下的磁化曲線來確定。

求解模型中有非線性材料的時候，使用者可以藉由網格的工作相對磁導率，來直觀地觀察非線性材料的飽和程度。計算方法其實就是利用B和H的場資訊來推測目前材料上面的permibility。使用方法請參考圖2-21。

<figure><img src="/files/sUhcwIqsmaebdVDe9yvO" alt=""><figcaption><p>圖2-21</p></figcaption></figure>


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