# Optimal Design of Electromagnetic Absorber Based on Magnetic Field Directional Consistency

## TL;DR

This paper introduces a new method to optimize the design of electromagnetic absorbers by improving magnetic field consistency, leading to better performance.

## Contribution

A novel permanent magnet edge topology optimization method is proposed to enhance force output efficiency in electromagnetic absorbers.

## Key findings

- A theoretical model shows a transition in dominant mechanisms based on chamfer depth.
- Experimental results show a 4.6% average increase in force output with up to 6.8% at 5 A.

## Abstract

This study proposes a permanent magnet edge topology optimization method to address the low force output efficiency in Electromagnetic Vibration Absorbers caused by magnetic field distortion at the geometric discontinuity between the permanent magnet and the magnetic yoke. A theoretical model incorporating magnetic flux enhancement and improved directional consistency is established, revealing a transition in dominant mechanisms: magnetic flux enhancement dominates at small chamfer depths, while improved directional consistency becomes predominant at larger chamfer depths. Experimental validation was conducted on the optimized structure with a standard chamfer angle and 4 mm chamfer depth under operational conditions. Test results show an average force output increase of 4.6%, reaching 6.8% at 5 A. This research provides a theoretical basis and design methodology for geometric optimization of electromagnetic actuators in space-constrained environments.