volume | PIER Journals

Abstract

This paper investigates the radial force characteristics of a novel two-phase dual layer switched reluctance generator. The proposed generator consists of two magnetically dependent stator and rotor layers, where each stator set includes four salient poles with windings wrapped around them while, the rotor comprises of two salient poles. In this paper, the radial and tangential force components and their trends in healthy condition under different load levels are assessed with the respect to critical rotor positions. One of the most important problems seen in the industrial applications of generators which have concerned users is the rotor eccentricity which may conclude the unbalanced distribution of flux linkage as well as acoustic noise and vibration due to the radial forces produced during the rotation of machine's rotor. In this regard, in this paper, it is attempted to obtain and evaluate the radial force components resulted from different degrees of eccentricity faults.

1. Torkaman, H. and E. Afjei, "FEM analysis of angular misalignment fault in SRM magnetostatic characteristics," Progress In Electromagnetics Research, Vol. 104, 31-48, 2010.
doi:10.2528/PIER10041406 Google Scholar

2. Torkaman, H. and E. Afjei, "Hybrid of freedom for radial airgap length in SRM under normal and faulty conditions based on magnetostatic model," Progress In Electromagnetics Research, Vol. 100, 37-54, 2010.
doi:10.2528/PIER09111108 Google Scholar

3. Torkaman, H., E. Afjei, and M. S. Toulabi, "New double-layer-per-phase isolated switched reluctance motor: Concept, numerical analysis, and experimental confirmation," IEEE Transactions on Industrial Electronics, Vol. 59, No. 2, 830-838, 2012.
doi:10.1109/TIE.2011.2158049 Google Scholar

4. Torkaman, H., E. Afjei, R. Ravaud, et al. "Misalignment fault analysis and diagnosis in switched reluctance motor," International Journal of Applied Electromagnetics and Mechanics, Vol. 36, No. 3, 253-265, 2011. Google Scholar

5. Afjei, E. and H. Torkaman, "Comparison of two types of dual layer generator in field assisted mode utilizing 3D-FEM and experimental verification," Progress In Electromagnetics Research B, Vol. 23, 293-309, 2010. Google Scholar

6. Torkaman, H. and E. Afjei, "Magnetio static field analysi regarding the e®ects of dynamic eccentricity in switched reluctance motor," Progress In Electromagnetics Research M, Vol. 8, 163-180, 2009.
doi:10.2528/PIERM09060205 Google Scholar

7. Wen, D. and L. Deliang, "Modeling of a 6/4 switched reluctance motor using adaptive neural fuzzy inference system," IEEE Transactions on Magnetics, Vol. 44, No. 7, 1796-1804, 2008.
doi:10.1109/TMAG.2008.919711 Google Scholar

8. Cao, X., Z. Deng, G. Yang, et al. "Independent control of average torque and radial force in bearingless switched-reluctance motors with hybrid excitations," IEEE Transactions on Power Electronics, Vol. 24, No. 5, 1376-1385, 2009.
doi:10.1109/TPEL.2009.2016568 Google Scholar

9. Morrison, C. R., M. W. Siebert, E. J. Ho, et al. "Electromagnetic forces in a hybrid magnetic-bearing switched-reluctance motor," IEEE Transactions on Magnetics, Vol. 44, No. 12, 4626-4638, 2008.
doi:10.1109/TMAG.2008.2002891 Google Scholar

10. Lin, F. C. and S. M. Yang, "An approach to producing controlled radial force in a switched reluctance motor," IEEE Transactions on Industrial Electronics, Vol. 55, No. 4, 2137-2146, 2007. Google Scholar

11. Lin, F. C. and S. M. Yang, "Instantaneous shaft radial force control with sinusoidal excitations for switched reluctance motors," IEEE Transactions on Energy Conversion, Vol. 22, No. 3, 629-636, 2007.
doi:10.1109/TEC.2006.881394 Google Scholar

12. Takemoto, M., A. Chiba, H. Suzuki, et al. "Radial force and torque of a bearingless switched reluctance motor operating in a region of magnetic saturation ," IEEE Transactions on Industry Applications, Vol. 40, No. 1, 103-112, 2004.
doi:10.1109/TIA.2003.821816 Google Scholar

13. Fiedler, J. O., K. A. Kasper, and R. W. De Doncker, "Calculation of the acoustic noise spectrum of SRM using modal superposition," IEEE Transactions on Industrial Electronics, Vol. 57, No. 9, 2939-2945, 2010.
doi:10.1109/TIE.2010.2046573 Google Scholar

14. Li, J. and Y. Cho, "Investigation into reduction of vibration and acoustic noise in switched reluctance motors in radial force excitation and frame transfer function aspects," IEEE Transactions on Magnetics, Vol. 45, No. 10, 4664-4667, 2009.
doi:10.1109/TMAG.2009.2021858 Google Scholar

15. Dorrell, D. G., M. Popescu, and D. M. Ionel, "Unbalanced magnetic pull due to asymmetry and low-level static rotor eccentricity in fractional-slot brushless permanent-magnet motors with surface-magnet and consequent-pole rotors," IEEE Transactions on Magnetics, Vol. 46, No. 7, 2675-2685, 2010.
doi:10.1109/TMAG.2010.2044582 Google Scholar

16. Wang, L., R. W. Cheung, Z. Ma, et al. "Finite-element analysis of unbalanced magnetic pull in a large hydro-generator under practical operations," IEEE Transactions on Magnetics, Vol. 44, No. 6, 1558-1561, 2008.
doi:10.1109/TMAG.2007.916023 Google Scholar

17. Cao, X., Z. Q. Deng, G. Yang, et al. "Independent control of average torque and radial force in bearingless switched-reluctance motors with hybrid excitations," IEEE Transactions on Power Electronics, Vol. 24, No. 5, 1376-1385, 2009.
doi:10.1109/TPEL.2009.2016568 Google Scholar

18. Lin, F.-C. and S.-M. Yang, "An approach to producing controlled radial force in a switched reluctance motor," IEEE Transactions on Industrial Electronics, Vol. 54, No. 4, 2137-2146, 2007.
doi:10.1109/TIE.2007.895129 Google Scholar

19. Yang, Y., Z. Q. Deng, G. Yang, et al. "A control strategy for bearingless switched-reluctance motors," IEEE Transactions on Power Electronics, Vol. 25, No. 11, 2807-2819, 2010.
doi:10.1109/TPEL.2010.2051684 Google Scholar

20. Afjei, E. and H. Torkaman, "The novel two phase field-assisted hybrid SRG: Magnetio static field analysis, simulation, and experimental confirmation," Progress In Electromagnetics Research B, Vol. 18, 25-42, 2009.
doi:10.2528/PIERB09082404 Google Scholar

21. Torkaman, H. and E. Afjei, "Comprehensive magnetic field-based study on effects of static rotor eccentricity in switched reluctance motor parameters utilizing three-dimensional finite element," Electromagnetics, Taylor and Francis, Vol. 29, No. 5, 421-433, 2009.
doi:10.1080/02726340902953354 Google Scholar

22. Afjei, E. and H. Torkaman, "Finite element analysis of SRG under fault condition oriented towards diagnosis of eccentricity fault," Applied Computational Electromagnetics Society Journal, Vol. 26, No. 1, 8-16, 2011. Google Scholar

23. Afjei, E. and H. Torkaman, "Investigation of electromagnetic characteristics in external rotor SRM under dynamic eccentricity fault," International Review of Electrical Engineering, Vol. 6, No. 3, 1257-1263, 2011. Google Scholar

24. Torkaman, H. and E. Afjei, "Magnetostatic field analysis and diagnosis of mixed eccentricity fault in switched reluctance motor," Electromagnetics, Taylor and Francis, Vol. 31, No. 5, 368-383, 2011.
doi:10.1080/02726343.2011.579774 Google Scholar

25. Torkaman, H. and E. Afjei, "Determining degrees of freedom for eccentricity fault in SRM based on nonlinear static torque function," COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering , Vol. 30, No. 2, 671-685, 2011.
doi:10.1108/03321641111101140 Google Scholar

26. Vaseghi, B., N. Takorabet, and F. Meibody-Tabar, "Transient finite element analysis of induction machines with stator winding turn fault," Progress In Electromagnetics Research, Vol. 95, 1-18, 2009.
doi:10.2528/PIER09052004 Google Scholar

27. Zhao, W., M. Cheng, R. Cao, et al. "Experimental comparison of remedial single-channel operations for redundant flux-switching permanent-magnet motor drive," Progress In Electromagnetics Research , Vol. 123, 189-204, 2012.
doi:10.2528/PIER11110405 Google Scholar

28. Lecointe, J. P., B. Cassoret, and J. F. Brudny, "Distinction of toothing and saturation effects on magnetic noise of induction motors," Progress In Electromagnetics Research, Vol. 112, 125-137, 2011. Google Scholar

29. Touati, S., R. Ibtiouen, O. Touhami, et al. "Experimental investigation and optimization of permanent magnet motor based on coupling boundary element method with permeances network," Progress In Electromagnetics Research, Vol. 111, 71-90, 2011.
doi:10.2528/PIER10092303 Google Scholar

30. Wang, Q. and X. Shi, "A an improved algorithm for matrix bandwidth and profile reduction in finite element analysis," Progress In Electromagnetics Research Letters, Vol. 9, 29-38, 2009.
doi:10.2528/PIERL09042305 Google Scholar

31. Tai, C.-C. and Y.-L. Pan, "Finite element method simulation of photoinductive imaging for cracks," Progress In Electromagnetics Research Letters, Vol. 2, 53-61, 2008.
doi:10.2528/PIERL07122807 Google Scholar

32. Mahmoudi, A., N. A. Rahim, and H. W. Ping, "Axial-flux permanent-magnet motor design for electric vehicle direct drive using sizing equation and finite element analysis," Progress In Electromagnetics Research, Vol. 122, 467-496, 2012.
doi:10.2528/PIER11090402 Google Scholar

33. Tian, J., Z.-Q. Lv, X.-W. Shi, et al. "An efficient approach for multifrontal algorithm to solve non-positive-definite finite element equations in electromagnetic problems," Progress In Electromagnetics Research, Vol. 95, 121-133, 2009.
doi:10.2528/PIER09070207 Google Scholar

34. Torkaman, H., N. Arbab, H. Karim, and E. Afjei, "Fundamental and magnetic force analysis of an external rotor switched reluctance motor," Applied Computational Electromagnetics Society Journal, Vol. 26, No. 10, 868-875, 2011. Google Scholar

Prof. Hossein Torkaman

Prof. Seyed Ebrahim Afjei