Eliminating the Third Harmonic Effect for Six Phase Permanent Magnet Synchronous Generators in One Phase Open Mode

다국어 초록 (Multilingual Abstract)

To insure stable operation and eliminate twice torque ripple, a topology for a six phase permanent magnet synchronous generator (SP-PMSG) with a neutral point connected together was analyzed in this paper. By adopting an extended transformation matrix, the mathematic model of the space vector control was established. The voltage and torque equations were deduced while considering the third harmonic flux and inductance. In addition, the suppression third harmonic method and the closed loop control strategy were proposed. A comparison analysis indicates that the cooper loss minimum method and the current magnitude minimum method can meet different application requirements. The voltage compensation amount for each of the methods was deduced which also takes into account the third harmonic effect. A simulation and experimental result comparison validates the consistency through theoretical derivation. It can be seen that all of the two control strategies can meet the requirements of post-fault.

목차 (Table of Contents)

• Abstract
• Ⅰ. INTRODUCTION
• Ⅱ. MATHEMATICAL MODEL OF A SP-PMSM IN THE FAULT MODE
• Ⅲ. SP-PMSG FAULT TOLERANT CONTROL IN THE ONE PHASE OPEN MODE
• Ⅳ. CLOSE LOOP CONTROL IN THE FAULT MODE
• Ⅴ. SIMULATIONS RESULT
• Ⅵ. EXPERIMENTAL RESULTS
• Ⅶ. CONCLUSIONS
• REFERENCES

참고문헌 (Reference)

1 K. Atallah, "Torque-ripple minimization in modular permanent-magnet brushless machines" 39 (39): 1689-1695, 2003

2 F. Baudart, "Torque control strategy of polyphase permanent-magnet synchronous machine with minimal controller reconfiguration under open-circuit fault of one phase" 59 (59): 2632-2644, 2012

3 H. M. Ryu, "Synchronous frame current control of multiphase synchronous motor under asymmetric fault condition due to open phases" 42 (42): 1062-1070, 2006

4 M. J. Duran, "Six-phase PMSG wind energy conversion system based on medium-voltage multilevel converter" 1-10, 2011

5 J. M. Apsley, "Open-circuit fault mitigation for multiphase induction motors with a unified control structure" 1-6, 2010

6 S. Dwari, "Open circuit fault tolerant control of five phase permanent magnet motors with third harmonic back EMF" 3114-3119, 2008

7 E. Levi, "Multiphase induction motor drives-a technology status review" 1 (1): 489-516, 2007

8 R. Kianinezhad, "Modeling and control of six-phase symmetrical induction machine under fault condition due to open phases" 55 (55): 1966-1977, 2008

9 Y. F. Zhao, "Modeling and control of multi-phase induction machine with structural unbalance : part 1" 11 (11): 570-577, 1996

10 Y. F. Zhao, "Modeling and control of a multi-phase induction machine with structural unbalance : Part 2" 11 (11): 570-577, 1996

11 W. U. N Fenando, "Model based optimization and fault tolerant control of permanent magnet machines with harmonic injection pulse width modulation" 1-6, 2011

12 D. Vizireanu, "Investigation on multi-star structures for large power direct-drive wind generator" 35 (35): 135-152, 2007

13 S. Dwari, "Fault-tolerrant control of five-phase permanent magnet motors with trapezoidal back EMF" 58 (58): 476-485, 2011

14 P. Z. Zhao, "Fault-tolerant control strategy for five-phase permanent magnetic synchronous motor under single phase open-circuit fault condition" 31 (31): 68-76, 2011

15 M. A. Shamsi-Nejad, "Fault tolerant and minimum loss control of double-star synchronous machines under open phase conditions" 55 (55): 1956-1965, 2008

16 J. R. Fu, "Disturbance-free operation of a multiphase current-regulated motor drive with an open phase" 30 (30): 1267-1274, 1994

17 C. B. Jacobina, "Disturbance free operation of a six-phase AC motor drive system" 925-931, 2004

18 W. U. N. Fenando, "Direct drive permanent magnet generator fed AC-DC active rectification and control for more electric aircraft engines" 5 (5): 14-27, 2011

19 A. Tani, "Control of multiphase induction motors with an odd number of phases under open-circuit phase faults" 27 (27): 565-577, 2012

20 H. A. Toliyat, "Analysis and simulation of five-phase variable-speed induction motor drives under asymmetrical connections" 13 (13): 748-756, 1998

21 J. Prieto, "A modified continuous PWM technique for asymmetrical six-phase induction machines" 1489-1494, 2010