magnet仿真问题

yms

magnet软件仿真时出现  The solver has encountered a non-physical situation in the problem specification.
                                  (error code 149075)
不知道为什么?模型复杂了吗

yuya

Error 145008 - There is a hole in your model that is not constrained. There may be an unintentional gap between components.

The "hole" refers to a void region (such as a through-hole or a tunnel that passes through the entire model) where no mesh exists.

The purpose of this error is mainly to warn the user of unintentional holes in 2D and 3D models. The reason is because the boundaries of these holes become exterior boundaries which will by default be assigned the Flux Tangential boundary condition. This can lead to unrealistic results. This can be explained by Ampere’s law where the net current enclosed inside a closed contour is equal to the integral of the tangential field along the contour. With a flux tangential boundary, it is possible for a non-zero H tangential field to exist when integrated along the closed contour of the hole. This would imply that there is an arbitrary non-zero current inside the hole.

The initial mesh should be viewed in order to visually detect void regions. Transparent components may also need to be temporarily made opaque for better visibility.

    For unintentional holes, the obvious resolution is to fill the hole with a component of the appropriate material and/or reconstruct components so that there are no holes or void regions.
    However, a common example of an intentionally created hole can be found in a motor when the non-permeable shaft is not geometrically modeled.
The error can also occur in partial models with periodic boundaries where there is no hole but "part of the hole" is present. Error 149075 may be reported instead of 145008 for this situation in MagNet 7.8 and later.

yms

yuya 发表于 2019-11-28 21:16
Error 145008 - There is a hole in your model that is not constrained. There may be an unintentional  ...

谢谢，我明白了