Slotless brushless DC machine design for Electro-Mechanical Batteries

Electro-Mechanical Batteries have important advantages compared with chemical batteries, especially in Low Earth Orbit satellites applications. High speed, slotless, external rotor, brushless DC machines are proposed and used in these systems as Motor/Generator. Proper material and structure for space applications are introduced, a simplified analytic design method is given for this type of machines this paper. finite element-based simulations are used to confirm the design process and show less than 6% error in theoretical design.