PIER B
 
Progress In Electromagnetics Research B
ISSN: 1937-6472
Home | Search | Notification | Authors | Submission | PIERS Home | EM Academy
Home > Vol. 49 > pp. 389-409

AN IMPROVED ANALYTICAL MODEL FOR SALIENT POLE SYNCHRONOUS MACHINES UNDER GENERAL ECCENTRICITY FAULT

By H. Akbari

Full Article PDF (628 KB)

Abstract:
This paper develops a more precise analytical model for calculating salient pole synchronous machine (SPSM) inductances in case of general eccentricity including static, dynamic and mixed eccentricities. The developed method is based on the modified winding function approach (MWFA) which accurately considers variable air gap function and leads to pure analytical expressions of inductances. Available analytical techniques, based on MWFA, approximate the air gap function and simplify the geometrical model of SPSM, whereas, in this study, the influence of the openings between the rotor salient poles has been taken into account by using an effective form of rotor pole shoes. Using this technique, flux fringing effect is considered. By taking into account machine geometry, type of windings connection and flux fringing effect, this method is able to model most of the important features of an eccentric SPSM. The developed analytical expressions can calculate time varying inductances of SPSMs with any eccentricity type and degree in the frame of a single program. Simulation results for static eccentricity are compared with experimental tests on a laboratory generator to verify accuracy of the proposed model.

Citation:
H. Akbari, "An Improved Analytical Model for Salient Pole Synchronous Machines Under General Eccentricity Fault," Progress In Electromagnetics Research B, Vol. 49, 389-409, 2013.
doi:10.2528/PIERB13010101

References:
1. Toliyat, H., T. A. Lipo, and J. C. White, "Analysis of a concentrated winding induction machine for adjustable speed drive applications. I. Motor analysis," IEEE Transactions on Energy Conversion, Vol. 6, 679-692, 1991.
doi:10.1109/60.103641

2. DeBortoli, , M. J., , S. J. Salon, and C. J. Slavic, "Effect of rotor eccentricity and parallel winding on induction behavior: A study using finite element analysis," IEEE Transactions on Magnetics, Vol. 29, No. 2, 1676-1682, 1993.
doi:10.1109/20.250728

3. 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

4. Milimonfared, J., H. Meshgin Kelk, A. Der Minassians, S. Nandi, and H. A. Toliyat, "A novel approach for broken bar detection in cage induction motors," IEEE Transactions on Industry Applications, Vol. 35, 1000-1006, 1999.
doi:10.1109/28.793359

5. Joksimovic, M. G. and J. Penman, "The detection of inter turn short circuits in the stator windings of operating motors," IEEE Transactions on Industry Application, Vol. 47, 1078-1084, 2000.

6. Al-Nuaim, N. A. and H. Toliyat, "A novel method for modeling dynamic air-gap eccentricity in synchronous machines based on modified winding function theory," IEEE Transactions on Energy Conversion, Vol. 13, 156-162, 1998.
doi:10.1109/60.678979

7. Tabatabaei, I, J. Faiz, H. Lesani, and M. T. Nabavi-Razavi, "Modeling and simulation of a salient pole synchronous generator with dynamic eccentricity using modified winding function approach," IEEE Transactions on Magnetics, Vol. 40, No. 3, May 2004.
doi:10.1109/TMAG.2004.826611

8. Joksimovic, G. M., "Dynamic simulation of cage induction machine with air gap eccentricity," IEE Proc. Electr. Power Appl., Vol. 152, No. 4, 803-811, July 2005.
doi:10.1049/ip-epa:20041229

9. Mishra, C., A. Routray, and S. Mukhopadhyay, "A computationally eĀ±cient winding function method for calculation of inductances in an asymmetric induction motor," Electric Power Components and Systems, Vol. 35, No. 1, 43-61, 2007.
doi:10.1080/15325000600815456

10. Akbari, H., H. Meshgin Kelk, and J. Milimonfared, "Extension of winding function theory for radial and axial non-uniform air gap in salient pole synchronous machines," Progress In Electromagnetics Research, Vol. 114, 407-428, 2011.

11. Lubin, T. , T. Hamiti, H. Razik, and A. Rezzoug, "Comparison between finite element analysis and winding function theory for inductances and torque calculation of a synchronous reluctance machine," IEEE Transactions on Magnetics, Vol. 43, No. 8, 3406-3410, 2007.
doi:10.1109/TMAG.2007.900404

12. Babaei, M., J. Faiz, B. M. Ebrahimi, S. Amini, and J. Nazarzadeh, "A detailed analytical model of a salient-pole synchronous generator under dynamic eccentricity fault," IEEE Transactions on Magnetics, Vol. 47, No. 4, 764-771, 2011.
doi:10.1109/TMAG.2011.2105498

13. Toliyat, H. A. and N. A. Al-Nuaim, "Simulation and detection of dynamic air-gap eccentricity in salient-pole synchronous machines," IEEE Transactions on Industry Applications, Vol. 35, No. 1, 86-93, 1999.
doi:10.1109/28.740849

14. Tu, X., L.-A. Dessaint, M. El Kahel, and A. Barry, "Modeling and experimental validation of internal faults in salient pole synchronous machines including space harmonics," Mathematics and Computers in Simulation, Vol. 71, 425-439, 2006.
doi:10.1016/j.matcom.2006.02.003

15. Neti, P. and S. Nandi, "Stator interturn fault detection of synchronous machines using field current and rotor search-coil voltage signature analysis," IEEE Transactions on Industry Applications, Vol. 45, No. 3, 911-920, 2009.
doi:10.1109/TIA.2009.2018905

16. Dehkordi, A., P. Neti, A. Gole, and T. Maguire, "Development and validation of a comprehensive synchronous machine model for a real time environment," IEEE Transactions on Energy Conversion, Vol. 25, No. 1, 34-48, 2010.
doi:10.1109/TEC.2009.2038530

17. Akbari, H., J. Milimonfared, and H. Meshgin Kelk, "A novel technique for the computation of inductances of salient pole machines under different eccentricity conditions," Electric Power Components and Systems, Vol. 39, No. 14, 1507-1522, 2011.
doi:10.1080/15325008.2011.596752

18. Faiz, J., I. Tabatabaei, and E. Sharifi, "A precise electromagnetic modeling and performance analysis of a three-phase squirrel-cage induction motor under mixed eccentricity condition," Electromagnetics, Vol. 24, 471-489, 2004.
doi:10.1080/02726340490467637

19. Ostovic, V., Computer Aided Analysis of Electrical Machines, Mathematical Approach, Prentice Hall, Englewood Cli?s, NJ, 1994.

20. Akbari, H., "Analytical computation of reluctance synchronous machine inductances under di?erent eccentricity faults," Progress In Electromagnetics Research M, Vol. 24, 29-44, 2012.


© Copyright 2010 EMW Publishing. All Rights Reserved