Comparison of the Effect of the Number of Slots and Poles of Multi-Pole Aircraft Electric Machines on the Attraction of Stator Teeth to the Rotor

Multi-pole designs of electric machines have great prospects for use in electric aviation. The ratio of slots and poles has an extremely strong influence on the characteristics of electric machines. One of the effects is the attraction of the stator to the rotor, the magnitude of which can disrupt the stable operation of the electric machine. This paper presents a study of the influence of the number of slots and poles of multi-pole aircraft electric machines on the attraction of stator teeth to the rotor. 4 different designs are considered, numerical calculations are carried out and the force of interaction between the stator and the rotor is calculated. Comparison of the 4 designs and interaction forces between the stator and rotor shows that increasing the number of slots can have a significant impact on reducing the attractive forces between the stator and rotor.