Rotor Pole Design in Spoke Type BLDC Motor by RSM

In order to effectively reduce the cogging torque and the torque ripple, these are resulting from the sinusoidal distributed flux density in air gap, a varying rotor pole shape is needed. This paper presents a new rotor pole design for bi-directional rotating spoke type brushless DC (BLDC) motor. Response surface method and finite-element analysis are employed to get the rotor geometry and verify the results of new pole shape