公开(公告)号：US20180188335A1

公开(公告)日：2018-07-05

申请号：US15741901

申请日：2015-07-24

申请人： Hitachi, Ltd.

发明人： Kazutami TAGO ,  Kenji MIYATA ,  Tomohito NAKANO

IPC分类号： G01R33/02 ,  G01R33/12 ,  G01R33/00 ,  G06F17/50 ,  G01N27/72

CPC分类号： G01R33/02 ,  G01N27/72 ,  G01R33/0064 ,  G01R33/1215 ,  G01R33/18 ,  G06F17/50 ,  G06F17/5009 ,  G06F17/5018 ,  G06F2217/16

摘要： In a magnetic field analysis calculation, there is a need to consider a characteristic that a magnetic field and a flux density face in different directions from each other by a stress in a magnetic material. Therefore, a measured value of a magnetic characteristic on a condition that the magnetic field, the magnetic flux density, and a mechanical stress are parallel is used. In a method and a device for magnetic field analysis calculation, a stress magnetic anisotropy is calculated using a relation between a magnetostriction of the magnetic material, the magnetic flux density, and the stress and a relation between a magnetization curve of the magnetic material, the magnetic flux density, and the stress which are measured on a condition that the magnetic field and the stress in the magnetic material are parallel.

公开(公告)号：US20170315002A1

公开(公告)日：2017-11-02

申请号：US15525967

申请日：2014-11-14

申请人： HITACHI, LTD.

发明人： Tomohito NAKANO ,  Kenji MIYATA

IPC分类号： G01L1/12 ,  G06F17/16 ,  G06F17/11

CPC分类号： G01L1/12 ,  G06F17/11 ,  G06F17/16 ,  G06F17/5018 ,  G06F2217/16

摘要： The present invention provides a method for calculating an electromagnetic force distribution with high accuracy. Electromagnetic force acting on an element is calculated by surface integral of force acting on each of the element interfaces. Moreover, an influence caused by a mesh is reduced by using an outward unit normal vector of each of the element interfaces, not using a shape function that is affected by the mesh.