Optimal Step-Skew Methods for Cogging Torque Reduction Accounting for Three-Dimensional Effect of Interior Permanent Magnet Machines

@article{Ge2017OptimalSM,
  title={Optimal Step-Skew Methods for Cogging Torque Reduction Accounting for Three-Dimensional Effect of Interior Permanent Magnet Machines},
  author={Xiao Ge and Zi Qiang Zhu and Graham Kemp and David Moule and Connel Williams},
  journal={IEEE Transactions on Energy Conversion},
  year={2017},
  volume={32},
  pages={222-232}
}
This paper proposes optimal step-skew methods for cogging torque reduction in interior permanent magnet (IPM) machines. First, a vector diagram method is employed to analyze the principle of a conventional three-step-skewed rotor, followed by two-dimensional (2-D) finite element (FE) validation. However, a considerable component of the cogging torque still exists according to 3-D FE analysis. End leakage flux and interaction between adjacent rotor steps are then investigated. To further reduce… CONTINUE READING