@article{CTT100840430,
  author = {Zongwei Liu and Akira Chiba and Yusuke Irino and Yuji Nakazawa},
  title = {Optimum Pole Number Combination of a Buried Permanent Magnet Bearingless Motor and Test Results at an Output of 60 kW With a Speed of 37000 r/min},
  journal = {IEEE Open Jounal of Industry Applications},
  year = 2020,
}

@inproceedings{CTT100829928,
  author = {Akira Chiba and Zongwei Liu},
  title = {A novel BPM bearingless motor model with small suspension force angle error},
  booktitle = {},
  year = 2019,
}

@inproceedings{CTT100829919,
  author = {Zongwei Liu and Akira Chiba},
  title = {A novel BPM bearingless motor model with small suspension force angle error},
  booktitle = {},
  year = 2019,
}

@inproceedings{CTT100816325,
  author = {Zongwei Liu and Akira Chiba},
  title = {Optimum Pole Number Combination for High-Speed High-Power BPM Bearingless Motor},
  booktitle = {},
  year = 2018,
}