Influence of Slot Flux Leakage on the Current Distribution in Axial Flux Machine Windings

The uneven distribution of current will increase the equivalent resistance, which will lead to the increase of copper loss. Therefore, the influence of different flux leakage components on the current distribution of axial-flux motor is studied in this paper. The finite element software is used to separate the permanent flux leakage and armature flux leakage by freezing the permeability, analyze their distribution patterns, and further explain how the axial and tangential components of flux leakage affect the current distribution. Finally, two effective methods to reduce AC copper loss are proposed, and the two methods are compared.