FEMm for a voice coil motor

FEMM (Finite Element Method Magnetics) Simulation of High-Performance Voice Coil Actuator. Design Details * Ring magnets: 5 pieces * Magnet type: NdFeB ring magnets, N55 * Magnet size: 40 mm OD × 20 mm ID × 10 mm thickness each * Total magnet stack height: 50 mm * Magnetization: Axial * Center pole options to compare: * 17 mm diameter * 16 mm diameter * Magnet inner diameter: 20 mm * Steel yoke/outer wall: soft magnetic steel / mild steel * Outer steel wall thickness: approximately 10 mm * Radial air gap: * With 17 mm pole: 1.5 mm per side * With 16 mm pole: 2.0 mm per side Required Output * FEMM axisymmetric magnetostatic model * Magnetic flux lines * Magnetic field strength in the radial air gap * Radial flux density Br along the full 50 mm coil length * Comparison of 17 mm vs 16 mm center pole * Check for magnetic leakage * Check for steel saturation * Suggest simple geometry changes to increase radial gap field * Provide FEMM files and a short report

Project ID: 40561612