Additive Manufacturing for Skew Magnetization Fixture of Annular Magnet

This article aims to implement a skew magnetization fixture for an annular magnet using a three-dimensional optimized design executed via the innovative magnetic metal additive manufacturing technique known as selective laser melting. Traditionally, fabricating magnetization fixtures involves creating molds or using wire-cut silicon steel sheets, both of which incur substantial prototyping costs and time. Additionally, designing such fixtures with skewed configurations using wire-cut silicon steel poses challenges, as the sharp corners produced by this process, are prone to damaging the insulation layer of the wire at winding terminations. This study designed the magnetization fixture for a coaxial magnetic gear to produce a skewed shape and a 3D tooth round-shaped configuration of the winding part through additive manufacturing. This enables more efficient utilization of energy for magnetizing annular magnets. Finite element analysis was employed to simulate and validate the three-dimensional magnetization fixture. This approach eliminates the need for traditional mold-making or wire-cutting of silicon steel, facilitating rapid and precise fabrication. Experimental results from the prototype of the three-dimensional magnetization fixture are presented to validate its designed performance.