Comments on: B-H 曲线如何影响磁分析？如何优化？ - 优米账号 //www.co2jys.com/blogs/how-the-b-h-curve-affects-a-magnetic-analysis-and-how-to-improve-it 发布博客 Thu, 24 Oct 2024 09:07:57 +0000 hourly 1 https://wordpress.org/?v=6.7.2 By: hao huang //www.co2jys.com/blogs/how-the-b-h-curve-affects-a-magnetic-analysis-and-how-to-improve-it/#comment-35063 Fri, 06 Sep 2024 01:39:59 +0000 http://cn.staging.comsol.com/blogs?p=297791#comment-35063 In reply to 磊 陈.

陈磊，您好！

感谢您的评论。

这个是合理的现象，因为在磁芯表面是一种介质分界面，根据磁性介质表面法向分量连续，B1n=B2n，两侧的磁导率不同，磁导率高的材料其磁场强度会变低。类似于静电场中不同介电常数的介质分界面两侧电场不同。

如果有进一步问题，建议您联系 co2jys 的技术支持团队：
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谢谢！

]]> By: 磊 陈 //www.co2jys.com/blogs/how-the-b-h-curve-affects-a-magnetic-analysis-and-how-to-improve-it/#comment-33953 Fri, 02 Aug 2024 16:32:44 +0000 http://cn.staging.comsol.com/blogs?p=297791#comment-33953 使用带有BH曲线的软磁材料在磁场中磁化，计算后软磁材料内的磁场强度远小于周围空气域，这就导致根据BH曲线得到的磁感应强度也非常小。我观察软磁材料的磁化强度很大，如果用磁化强度对照BH曲线得到的磁感应强度值才应该是正确的。所以我可能出错的地方在哪里？我看comsol里的静磁学科普，里面提到磁化强度M=B/u-H。所以理论上软磁材料BH曲线中H的值应该是M+H。为什么软件默认不设置好呢？

]]> By: hao huang //www.co2jys.com/blogs/how-the-b-h-curve-affects-a-magnetic-analysis-and-how-to-improve-it/#comment-30923 Mon, 20 May 2024 06:50:14 +0000 http://cn.staging.comsol.com/blogs?p=297791#comment-30923 In reply to 雅迪 王.

可以用相对磁导率也可以用 B-H 曲线描述。

]]> By: 雅迪 王 //www.co2jys.com/blogs/how-the-b-h-curve-affects-a-magnetic-analysis-and-how-to-improve-it/#comment-29843 Thu, 18 Apr 2024 08:29:45 +0000 http://cn.staging.comsol.com/blogs?p=297791#comment-29843 您好，请问变压器短路仿真中，comsol计算线圈电流需要用到B-H曲线吗？

]]> By: Qihang Lin //www.co2jys.com/blogs/how-the-b-h-curve-affects-a-magnetic-analysis-and-how-to-improve-it/#comment-25743 Mon, 13 Nov 2023 07:56:37 +0000 http://cn.staging.comsol.com/blogs?p=297791#comment-25743 In reply to JINGWEN ZHENG.

可以考虑使用外部函数，请参考：//www.co2jys.com/model/external-material-ac-dc-module-general-hb-bh-relation-32321

]]> By: JINGWEN ZHENG //www.co2jys.com/blogs/how-the-b-h-curve-affects-a-magnetic-analysis-and-how-to-improve-it/#comment-25683 Fri, 10 Nov 2023 09:09:00 +0000 http://cn.staging.comsol.com/blogs?p=297791#comment-25683 要如何修改磁化函数呢？

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