# Vol. 47

Front:[PDF file] Back:[PDF file]
Latest Volume
All Volumes
All Issues
2016-03-17

#### Study on Radial Suspension Force of Single Winding Bearingless Induction Motor Based on Two-Fundamental Wave Method

By Zebin Yang, Ren Jin, Xiaodong Sun, and Wei Yu Zhang
Progress In Electromagnetics Research M, Vol. 47, 13-25, 2016
doi:10.2528/PIERM16011903

## Abstract

The radial suspension force with a new structure of a bearingless induction motor based on single winding is researched. Compared to the conventional double-winding structure of bearingless induction motor, torque and suspension forces are produced with a single-winding system. Bearingless induction motor is a nonlinear, multi-variable and strong coupling system. It is difficult to obtain an accurate mathematical model on the radial suspension force. So the research method about radial suspension force of a single-winding bearingless induction motor is proposed, based on two fundamentals. Firstly, a new structure and operation principle of a single-winding bearingless induction motor is introduced. Then the air-gap flux density distribution of the single-winding bearingless induction motor is analyzed in detail. The accurate mathematical model of radial suspension force is deduced by using two-fundamental wave method and Maxwell's stress tensor method. Secondly, according to the transient analysis of the single-winding bearingless induction motor which its speed is 6000 r/min, by finite element method (FEM), the component of radial suspension force in x-axis and y-axis is obtained by FEM simulation analysis. The calculation results used by FEM and the theoretical calculation results of mathematical model used by two fundamental wave method have been compared. Thirdly, an experimental prototype is produced, and suspension experiment of prototype is carried out. Then measured result of radial suspension force is analyzed. The analysis results show that the prototype has excellent suspension characteristics, and the mathematical model of radial suspension force based on two-fundamental wave method has low error and high precision.

## Citation

Zebin Yang, Ren Jin, Xiaodong Sun, and Wei Yu Zhang, "Study on Radial Suspension Force of Single Winding Bearingless Induction Motor Based on Two-Fundamental Wave Method," Progress In Electromagnetics Research M, Vol. 47, 13-25, 2016.
doi:10.2528/PIERM16011903
http://www.jpier.org/PIERM/pier.php?paper=16011903

## References

1. Xu, B., et al., "Rotating high frequency signal injection method based on FIR optimization filter and its application," Chinese Journal of Scientific Instrument, Vol. 33, No. 3, 589-595, 2012.

2. Sun, X. D., et al., "Speed-sensorless vector control of a bearingless induction motor with artificial neural network inverse speed observer," IEEE/ASME Transactions on Mechatronics, Vol. 18, No. 4, 1357-1366, 2013.
doi:10.1109/TMECH.2012.2202123

3. Li, B. N., et al., "Analysis and comparison of inductance and suspension force for 2-4 type and 4-2 type multiphase permanent magnet bearingless motors," Proceedings of the CSEE, Vol. 33, No. 33, 106-114, 2013.

4. Bu, W. S., et al., "MRAS speed identification of bearingless induction motor based on rotor flux orientation," Control Engineering of China, 2014.

5. Silber, S., et al., "Design aspects of bearingless slice motors," IEEE/ASME Transactions on Mechatronics, Vol. 10, No. 6, 611-617, 2005.
doi:10.1109/TMECH.2005.859813

6. Zhu, J., et al., "Principle and implementation of the single winding bearingless permanent magnetic slice motor," Proceedings of the CSEE, Vol. 28, No. 33, 68-74, 2008.

7. Asama, J., et al., "Proposal and analysis of a novel single-drive bearingless motor," IEEE Transactions on Industrial Electronics, Vol. 60, No. 1, 129-138, 2013.
doi:10.1109/TIE.2012.2183840

8. Sun, D. S., et al., "Modeling and control of induction machines with pole-phase modulation," Proceedings of the CSEE, Vol. 32, No. 18, 80-87, 2012.

9. Zhu, H. Y., et al., "Fault diagnosis of incipient broken rotor bars for squirrel-cage induction motor under continuous variable load condition," Chinese Journal of Scientific Instrument, Vol. 35, No. 7, 1646-1653, 2014.

10. Huang, J., et al., "Analysis and control of multiphase permanent-magnet bearingless motor with a single set of half-coiled winding," IEEE Transactions on Industrial Electronics, Vol. 61, No. 7, 3137-3145, 2014.
doi:10.1109/TIE.2013.2279371

11. Bu, W. S., et al., "General analytical model about controllable magnetic suspension force of bearingless motor," Proceedings of the CSEE, Vol. 29, No. 30, 84-89, 2009.

12. Zuo, W. Q., et al., "Accurate mathematical modeling of radial suspension force on bearingless permanent magnet slice motors," Proceedings of the CSEE, Vol. 32, No. 3, 103-110, 2012.

13. Kong, X. and L. Wang, "An adaptive parameter decoupling control method for bearingless synchronous reluctance motor," 2014 11th World Congress on IEEE Intelligent Control and Automation (WCICA), 4572-4576, 2014.
doi:10.1109/WCICA.2014.7053484

14. Zhang, H., et al., "Design and simulation of control system for bearingless synchronous reluctance motor," Proceedings of the Eighth International Conference on IEEE Electrical Machines and Systems, 2005, ICEMS 2005, 554-558, 2005.