《Ansys电磁分析官方培训教材_Chapter2-4》.pdf

Chapter 2 Section 4 Two Dimensional Magnetostatics Permanent magnets Typical Curve for a Rare Earth • Linear Permanent magnets Magnet – Induction curve is linear – Simulates most rare earth Intrinsic magnets Curve – Simulation requires the “Induction curve” B r – Requires two material properties B(T) • Relative permeability μr – Isotropic – Orthotropic Induction • Coercive force H c Hc curve – Vector quantity • Material properties are defined in H (Amp/m) terms of the element coordinate 2nd Quadrant systems – Default: global Cartesian ELECTROMAGNETIC ANALYSIS with ANSYS/Emag January 30, 1999 2.4-2 Release 5.5 (001172) – μr and Hc can be temperature dependent – Magnetization • Parallel/normal to magnet centerline • Radial/circumferential about an arbitrary center – Default values for μr and H are not offered in the c material library • Magnet development results in continu