PROJECT TITLE :
Cogging Torque Reduction of Single-Phase Brushless DC Motor With a Tapered Air-Gap Using Optimizing Notch Size and Position
This paper reports a stator shape optimization design for reducing the cogging torque of single-section brushless dc (BLDC) motors by adopting an asymmetric air-gap to make them self-starting. A time step 2-D finite-element analysis (FEA) was carried out to investigate the characteristics of the only-part BLDC motor. The Kriging model combined with Latin hypercube sampling and a genetic algorithm were used to cut back the cogging torque and maintain the potency and torque. As an optimal design result, the cogging torque of the optimal model was reduced. Finally, the analysis and optimal style results were confirmed by FEA as well as by experimental results.
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