Accurate Prediction of Leakage Flux Boundaries for an Axial-Flux MEMS Micromotor Design

This paper presents an axial-flux microelectromechanical systems micromotor with dual-rotor and 10 mm diameter. The leakage fluxes are a large proportion of the total flux due to the micro dimension. Therefore, an accuracy prediction of the boundaries of leakage fluxes is vital for motor design. Response surface methodology is well adapted to obtain empirical formulas of the boundaries of the leakage fluxes in this paper. Additionally, an improved pigeon-inspired optimization algorithm is used to efficiently search the coefficients of the second-order empirical formulas. The feasibility of the proposed method is validated by the three-dimensional finite element analysis. Finally, the method is applied to accurate design one micromotor.