Permanent magnet brushless machine for a hybrid electric scooter

The paper presents the design and analyze of a permanent magnet brushless machine for a hybrid electric scooter. Different combinations of slots number, magnetic poles, and concentrated windings are tested based on the speed-cycle and power-cycle of the scooter. A machine prototype has been build. The experimental data are used to validate the simulation model. A method of increasing the torque density of outer rotor machine is proposed and tested.