Stator Teeth Pairing Design for Reduction of Cogging Torque of Dual RFPM Generator

Abstract

In the application of small wind turbines, the minimization design of cogging torque is the most important to raise the utilization rate. In this paper, the stator teeth pairing design method is proposed to reduce the cogging torque of dual stator radial flux permanent magnet generators for small wind turbines. The proposed stator teeth pairing design method is to design the teeth width angle of the inner and outer stator differently from each other for the cancelation of cogging torque generated by each stator. For this study, 2D FEA is used for the analysis of cogging torque and driving characteristics. As a result, the applying effect of the suggested design method is verified.