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The torque ripple of a PM synchronous motor (PMSM) originates from two sources; the cogging torque and mismatch between the back EMF and phase current waveforms. The first source is only related to the magnetic design parameters of PMSM and the second source is related to the effect of the driving circuit on the magnetic design parameters. Therefore, achieving a minimum torque ripple requires a hybrid...
This paper discusses the performance attributes of the open-slot, modular-wound, external-rotor, topology of electrical machine. Combinations of pole and slot numbers are presented for which the winding factor is maximal and torque ripple is minimal. An optimization of the magnetic circuit design of six promising pole-slot configurations is undertaken using a parametric finite element model (FEM)...
The paper considers the optimal design of an open slot, external rotor torque motor. Combinations of pole and slot numbers are presented for which the winding factor is maximal and torque ripple is minimal. A detailed optimisation of the magnetic circuit design of the six most promising pole-slot configurations has been undertaken using the combination of a genetic algorithm (GA) and a parametric...
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