Design and Analysis of Sandwitched Stator Axial Flux Permanent Magnet Brushless DC Motor

Abstract

Axial-flux permanent-magnet machines are important technology in many applications, where they are an alternative to radial-flux permanent-magnet machines. There are many technological advancements in axial-flux permanent-magnet machines, in aspects of construction, features, modeling, simulation, analysis and design procedure. Axial-flux permanent-magnet (AFPM) machines have many unique features. For being permanent magnet, they usually are more efficient, as field excitation losses are eliminated, reducing rotor lossses significantly. Machine efficiency is thus greatly improved, and higher power density achieved. Axial-flux construction has less core material, so, high torque-to-weight ratio. Also, AFPM machines have thin magnets, so are smaller than radial ux counterparts. AFPM machine size and shape are important features in applications where space is limited, so compatibility is crucial. The noise and vibration they produce are less than those of conventional machines. Their air gaps are planar and easily adjustable. These benefits give AFPM machines advantages over conventional machines, in various applications. Computer aided design procedure of Axial Flux Permanent Magnet Brushless DC Motor is done. Subsequently analysis and performance estimation is carried out.