This paper proposed a new external-rotor yokeless and segmented armature axial fl ux machine applied in-wheel traction.
The loss analysis for the motor cooling casing is performed based on fi nite-element method, and the height of the cooling fi ns is...
This paper proposed a new external-rotor yokeless and segmented armature axial fl ux machine applied in-wheel traction.
The loss analysis for the motor cooling casing is performed based on fi nite-element method, and the height of the cooling fi ns is optimized to decrease the eddy current loss and increase the effi ciency of the motor. Subsequently, epoxy potting is developed to increase the heat transfer effi ciency. On this basis, thermal analysis is conducted to verify the temperature of the stator. Finally, the in-wheel motor is manufactured and tested, and the measured data matches well with the results of the electromagnetic and thermal analysis. Compared with the radial fl ux PM (RFM) motor in the same volume, the peak torque and peak power of the YASA are 1.67 times and 1.3 times of the RFM respectively.