1. Abdeltawab, H. H. and Y. A. I. Mohamed, "Robust energy management of a hybrid wind and flywheel energy storage system considering flywheel power losses minimization and grid-code constraints," IEEE Trans. Ind. Electron., Vol. 63, No. 7, 4242-4254, Jul. 2016.
2. Zhang, W., H. Yang, L. Cheng, and H. Zhu, "Modeling based on exact segmentation of magnetic field for a centripetal force type-magnetic bearing," IEEE Trans. Ind. Electron., Vol. 67, No. 9, 7691-7701, Sept. 2020.
3. Zhang, W., L. Cheng, and H. Zhu, "Suspension force error source analysis and multidimensional dynamic model for a centripetal force type-magnetic bearing," IEEE Trans. Ind. Electron, Vol. 67, No. 9, 7617-7628, Sept. 2020.
4. Zhao, C. and H. Zhu, "Design and analysis of a novel bearingless flux-switching permanent magnet motor," IEEE Trans. Ind. Electron., Vol. 64, No. 8, 6127-6136, Aug. 2017.
5. Zhu, H. and Y. Xu, "Permanent magnet parameter design and performance analysis of bearingless flux switching permanent magnet motor," IEEE Trans. Ind. Electron., Vol. 68, No. 5, 4153-4163, May 2021.
6. Sun, X., L. Chen, and Z. Yang, "Overview of bearingless permanent-magnet synchronous motors," IEEE Trans. Ind. Electron., Vol. 60, No. 12, 5528-5538, Dec. 2013.
7. Zhu, H. and Z. Gu, "Active disturbance rejection control of 5-degree-of-freedom bearingless permanent magnet synchronous motor based on fuzzy neural network inverse system," ISA Transactions, Vol. 101, 295-308, Jan. 2020.
8. Steinert, D., I. Kovacevic-Badstübner, T. Nussbaumer, and J. W. Kolar, "Loss investigation of slotless bearingless disk drives," Proc. IEEE Energy. Convers. Congr. Expo. (ECCE), 4418-4424, Sep. 2015.
9. Fu, Y., M. Takemoto, S. Ogasawara, and K. Orikawa, "Investigation of a high speed and high power density bearingless motor with neodymium bonded magnet," Proc. IEEE Int. Electr. Mach. Driv. Conf. (IEMDC), 1-8, May 2017.
10. Sun, Y., B. Su, and X. Sun, "Optimal design and performance analysis for interior composite-rotor bearingless permanent magnet synchronous motors," IEEE Access, Vol. 7, 7456-7465, Jan. 2019.
11. Ooshima, M., S. Kitazawa, A. Chiba, and T. Fukao, "Design and analyses of a coreless-stator-type bearingless motor/generator for clean energy generation and storage systems," IEEE Trans. Magn., Vol. 42, No. 10, 3461-3463, Oct. 2006.
12. Ooshima, M., S. Kobayashi, and H. Tanaka, "Magnetic suspension performance of a bearingless motor/generator for flyweel energy storage systems," IEEE PES Gen. Meet., 1-4, Jul. 2010.
13. He, C. and T. Wu, "Analysis and design of surface permanent magnet synchronous motor and generator," CES Trans. Electr. Mach. Syst., Vol. 3, No. 1, 94-100, Mar. 2019.
14. Liu, B., R. Badcock, H. Shu, L. Tan, and J. Fang, "Electromagnetic characteristic analysis and optimization design of a novel HTS coreless induction motor for high-speed operation," IEEE Trans. Appl. Supercond., Vol. 28, No. 4, 1-5, Jun. 2018.
15. Stamenkovic, I., N. Milivojevic, N. Schofield, M. Krishnamurthy, and A. Emadi, "Design, analysis, and optimization of ironless stator permanent magnet machines," IEEE Trans. Power Electron, Vol. 28, No. 5, 2527-2538, May 2013.
16. Liu, K., M. Yin, W. Hua, Z. Ma, M. Lin, and Y. Kong, "Design and optimization of an external rotor ironless BLDCM used in a flywheel energy storage system," IEEE Trans. Magn., Vol. 54, No. 11, 1-5, Nov. 2018.
17. Kim, K. and B. Lee, "Taguchi robust design for the multi-response considering the manufacturing tolerance used in high-speed air blower motor," IET Electr. Power Appl., Vol. 14, No. 7, 1141-1147, Feb. 2020.
18. Guo, Y., J. Si, C. Gao, H. Feng, and C. Gan, "Improved fuzzy-based Taguchi method for multi-objective optimization of direct-drive permanent magnet synchronous motors," IEEE Trans. Magn., Vol. 55, No. 6, 1-4, Jun. 2019.
19. Hwang, C., C. Chang, and C. Liu, "A fuzzy-based Taguchi method for multiobjective design of PM motors," IEEE Trans. Magn., Vol. 49, No. 5, 2153-2156, May 2013.
20. Zhu, H., S. Shen, and X. Wang, "Multi-objective optimization design of outer rotor coreless bearingless permanent magnet synchronous motor," IEEE J. Emerg. Sel. Topic Circuits Syst., Apr. 2021.
21. Zhang, J., H. Wang, L. Chen, C. Tan, and Y. Wang, "Multi-objective optimal design of bearingless switched reluctance motor based on multi-objective genetic particle swarm optimizer," IEEE Trans. Magn., Vol. 54, No. 1, 1-13, Jan. 2018.