Comparison of Axial Flux PMSM and Outrunner PMSM under Same Physical and Electrical Parameters according to Cogging Torque

Axial flux permanent magnet motor (AFPMM) and outrunner permanent magnet motor (ORPMM) are generic rotating machines that are commonly used. Cogging torque is an undesired output for electrical motors. Although the cogging torque is not an important problem at high operational speed thanks to moment of inertia, it is a serious trouble that must be overcome at low operational speed. Especially, it must be minimized for movement of solar panels on a satellite. Due to the fact that the cogging torque is so important factor for design of permanent magnet synchronous motor, in this study it is only focused on the cogging torque. For that reason, two designed motors are compared according to cogging torque. Thus, it has been shown what type of motor should be preferred for minimum cogging torque desired applications.