Finite Element Analysis and Design of Hybrid-Excitation Self-Contained Power Supply for Unmanned Aerial Vehicle Housing

This study involves the design of a hybrid excitation self-contained power supply using the finite element analysis software Maxwell 3D for model construction; considering the hybrid excitation optimization design as the goal, two structural improvement plans are proposed. The first radial hybrid design is intended for magnet fixation and entails improvement strategies to effectively fix the magnet while alleviating the phenomenon of magnetic saturation. The second axial mixing plan aims to increase the power density per unit volume of the magnet for output voltage optimization. The feasibility of each improvement strategy was verified through magnetic circuit analysis, focusing on optimization of the design direction. Moreover, the suitability of hybrid excitation was proven through hardware measurements. Accordingly, in an environment where the power cable transmission current was 300A, the output voltage increased by as much as 50.18% over the pure silicon steel sheet (PSSS) type. Finally, regarding product development practices, the economic benefit was examined when specifically applied to drones. Macroscopically, applications are also considered for instances when there are no power supplies or when batteries cannot be replaced easily, such as in smart electricity meters and automated external defibrillators installed in inaccessible places.