Il Hwan Park, Dong Sok Kim, Gwan Soo Park, 2010, A Study on Reducing Cogging Torque by Core Shapes in Permanent Magnet Motors, Journal of the Korean Magnetics Society, Vol. 20, No. 2, pp. 61-67

J. W. Kwon, W. Zhao, B. I. Kwon, 2016, Comparison of ESPMM with Phase-Group Concentrated-Winding Characteri- stics According to the Pole-Slot Combination, Electrical Machinery & Energy Conversion Systems Societyannual Spring Conference, pp. 172-175

Bo Shao, Zhi-tong Cao, Hong-ping Chen, Guo- guang He, 2015, Cogging force and its estimation using a neural network based on 2D field model of PMLSM, IEEE International Conference on Electric Machines and Drives, 2005., San Antonio, TX, pp. 1243-1248

X. Ge, Z. Q. Zhu, G. Kemp, D. Moule, C. Williams, March 2017, Optimal Step-Skew Methods for Cogging Torque Reduction Accounting for Three-Dimensional Effect of Interior Per- manent Magnet Machines, in IEEE Transactions on Energy Conversion, Vol. 32, No. 1, pp. 222-232