Fast Computation of 3D Magnetic Fields from Distributed Permanent-Magnet and Electro-Magnet Structures Using the Volume Integral Approach

摘要

Basic principles of the volume integral approach, and its application to solving 3d magnetostatics problems with distributed permanent-magnet and electro-magnet structures are described. In this approach, mutual influence of different permanent-magnet and iron parts of geometry produced by segmentation is represented by fully-occupied interaction matrix; however, space between magnetized volumes does not require any meshing. Solving is performed by a special regularizing relaxation procedure, which supports nonlinear and linear anisotropic types of material relations. At calculation of the components of the interaction matrix and at post-processing, analytical formulas for magnetic field produced by uniformly-magnetized polyhedrons are used.