Low-Cost Axial Flux PCB Motor with Ferrite Core and Ferrite Magnet Topology for Fan Applications

Ensuring simplicity in design is crucial for achieving cost-effective mass production in small brushless permanent magnet motors with power ratings of up to 5 watts. In this regard, the present study proposes a novel three-phase axial flux permanent magnet motor architecture that employs a printed circuit board (PCB) in place of a conventional winding, thereby reducing the drive's complexity, cost, and component count. The use of a ferrite core and a high number of pole pairs further enhances the motor's efficiency and torque density. The paper provides a detailed account of the motor's construction and substantiates its feasibility through finite element studies conducted under both no-load and load scenarios. Additionally, critical design factors are elucidated. Overall, the findings highlight the potential of the proposed uncomplicated and economical motor topology for fan applications.