This paper investigates the capability and behaviors of two different tooth-concentrated winding topologies for traction electric machine applications. The well-known conventional 12-teeth/10-poles winding and also the new 18-teeth/10-poles winding with low-magnetomotive force (MMF) harmonic contents are investigated. Using these winding types, two permanent-magnet (PM) machines are designed and analyzed, and their performances have been compared. Considering the main machine parameters, such as the electromagnetic torque, losses, field-weakening capability, thermal behavior, and also the noise and vibrations characteristics, the obtained results show significant advantages for the new machine over the conventional design. For the new 18-teeth/10-poles PM machine design, a prototype machine is built and several measurements results for the electromagnetic torque and machine efficiency are given.
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Dajaku et al. (2016) studied this question.
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