Influence of Unequal Tooth Widths and Different Layer Numbers on Axial-Flux PM BLDC Machines

This paper provides a method for design of axialflux permanent-magnet brushless-dc (PM BLDC) machines with single-layer concentrated windings. In order to increase the torque, single-layer concentrated windings with unequal teeth is used. To investigate the influence of layer numbers and unequal tooth widths on machine performance, three axial-flux PMBLDC
machines with double-layer windings, single-layer windings, and single-layer windings with unequal tooth are compared. As axial
flux PM machines are inherently three-dimensiona  machines, 3-D finite-element analysis is used to study the machines precisely. It provides useful results to be considered in design of axial-flux PM BLDC machine

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