Design, analysis and improvement of a disc motor

Aiming at motor application problems in small space, this paper puts forward a new design scheme of Axial-Flux Brushless Permanent Magnetism Disc Motor (AFBPMDM) with coreless and slotless stator structure. Through 3D modeling of the disc motor with Ansoft Maxwell software and simulation of electromagnetic field, we can get distribution of disc motor magnetic induction intensity, air-gap flux density and torque waveforms. Parametric analysis on unilateral air-gap thickness is adopted, and then optimal value for length of unilateral air-gap is gained. Simulation results show that air-gap flux density is higher and torque increases around 38% after unilateral air-gap thickness optimization. Finally, the torque testing experiment verifies accuracy of the simulation and feasibility of the scheme.