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popohopo金蟲 (小有名氣)
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[交流]
介質(zhì)磁化,,邊界條件
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當(dāng)將磁各項(xiàng)同性,線性介質(zhì)放入均勻磁場(chǎng)中,介質(zhì)將會(huì)被磁化,如果不考慮退磁場(chǎng),是不是可以說:介質(zhì)內(nèi)外的磁場(chǎng)強(qiáng)度H相等 內(nèi)部有磁化強(qiáng)度存在,因此磁感應(yīng)強(qiáng)度B=u0*(H+M)=u0*(H0+M)=u*H0=ur*B0 (u0, ur 分別是介質(zhì)內(nèi)外的磁導(dǎo)率, B0為介質(zhì)外感應(yīng)強(qiáng)度) ······································································································································ 另外一種情況,如果有退磁場(chǎng)存在 介質(zhì)內(nèi)的磁場(chǎng)強(qiáng)度H不等于H0, Sample Text H=H0-NM 磁感應(yīng)強(qiáng)度B=u0*(H+M)=u0*(H0-NM+M), N為退磁系數(shù), 與樣品形狀有關(guān) M=xH x為磁化系數(shù) 介質(zhì)中磁場(chǎng)強(qiáng)度H=xH0/(1+Nx) 總結(jié):1 不考慮消磁/退磁, 磁場(chǎng)強(qiáng)度連續(xù),感應(yīng)強(qiáng)度不連續(xù),但是有直接的關(guān)系 2. 考慮消磁/退磁,兩者都不連續(xù),我們可以通過上述公式進(jìn)行計(jì)算 我的兩種情況下分析對(duì)嗎?請(qǐng)大神出來矯正??? |
介電材料 |
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至尊木蟲 (知名作家)
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金蟲 (小有名氣)
金蟲 (小有名氣)

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