Calculation and optimization of the 3D magnetic field in an aluminum reduction cell(Ⅰ)——Application of the spline integral equation method to 3D magnetic field calculation;

the leakage reactance which is caused by the magnetic isolated segment has been calculated by solving the 3D magnetic field,the ingenuity design of rotor lamination displays a skew slot role.

The 3D magnetic field of two different schemes is analyzed with the ANSOFT finite element analysis software and a relatively ideal scheme with magnetic field distribution is obtained and the selected structure is improved.

Analysis of three-dimensional magnetic field is the foundation work for optimum design of electromagnetic system.

Finite element language and finite element program generation technique,which have been developed in recent years,are applied to the automatic generation of the FORTRAN finite element program system for solving three dimensional magnetic field problems,where vector potential is used as the describing function of the magnetic field.

A new method for automatic finite element mesh generation of 3 D electromagnetic field problem is proposed by using fuzzy set theory,by which expert experiences on mesh generation can be fully used and reasonable 3 D meshes can be generated rapidly.

3-D electrode model of two segments coil axial magnetic field(AMF)contact of 126kV vacuum interrupter was built up,and the 3-D magetostatic field and eddy current field for finite element model in case of discharge were simulated by the 3-D finite element meshod.

The solution of 3D permanent magnetic fields having arbitrarily magnetizing direction;