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Combined star-delta windings to improve synchronous reluctance motor performance

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Abstract
This paper analyzes and compares the synchronous reluctance motor (SynRM) performance for a conventional star winding and for a combined star-delta connected winding under healthy and faulty conditions. The finite element method is used to simulate the SynRM characteristics in case of normal star and in case of combined star-delta connected windings. For the healthy case, it was found that for the same current, the SynRM output power increased by about 5% for the star-delta connected windings compared with the conventional star connection. Moreover, the efficiency increased slightly by 0.20%. Probably the strongest advantage of the combined star-delta winding is observed when a phase fault occurs. When one phase is missing, for the same current, the star-delta connected motor keeps 80% of the rated torque in the healthy case, while the star connected motor only keeps 40%. Furthermore, the torque ripple of the star wound machine is extremely high in case of a missing phase, compared to the star-delta wound machine. Simulation results were validated by experimental results to show the effectiveness of the star-delta connected windings on the SynRM.
Keywords
Synchronous Reluctance Motor, FEM, Performance, modelling, Star-delta connected windings, MAGNETIC SATURATION, MACHINE, TORQUE, COMPENSATION, DRIVES, DESIGN

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MLA
Ibrahim, Mohamed Nabil Fathy, Peter Sergeant, and Essam Eddin M Rashad. “Combined Star-delta Windings to Improve Synchronous Reluctance Motor Performance.” IEEE TRANSACTIONS ON ENERGY CONVERSION 31.4 (2016): 1479–1487. Print.
APA
Ibrahim, M. N. F., Sergeant, P., & Rashad, E. E. M. (2016). Combined star-delta windings to improve synchronous reluctance motor performance. IEEE TRANSACTIONS ON ENERGY CONVERSION, 31(4), 1479–1487.
Chicago author-date
Ibrahim, Mohamed Nabil Fathy, Peter Sergeant, and Essam Eddin M Rashad. 2016. “Combined Star-delta Windings to Improve Synchronous Reluctance Motor Performance.” Ieee Transactions on Energy Conversion 31 (4): 1479–1487.
Chicago author-date (all authors)
Ibrahim, Mohamed Nabil Fathy, Peter Sergeant, and Essam Eddin M Rashad. 2016. “Combined Star-delta Windings to Improve Synchronous Reluctance Motor Performance.” Ieee Transactions on Energy Conversion 31 (4): 1479–1487.
Vancouver
1.
Ibrahim MNF, Sergeant P, Rashad EEM. Combined star-delta windings to improve synchronous reluctance motor performance. IEEE TRANSACTIONS ON ENERGY CONVERSION. 2016;31(4):1479–87.
IEEE
[1]
M. N. F. Ibrahim, P. Sergeant, and E. E. M. Rashad, “Combined star-delta windings to improve synchronous reluctance motor performance,” IEEE TRANSACTIONS ON ENERGY CONVERSION, vol. 31, no. 4, pp. 1479–1487, 2016.
@article{7261449,
  abstract     = {This paper analyzes and compares the synchronous reluctance motor (SynRM) performance for a conventional star winding and for a combined star-delta connected winding under healthy and faulty conditions. The finite element method is used to simulate the SynRM characteristics in case of normal star and in case of combined star-delta connected windings. For the healthy case, it was found that for the same current, the SynRM output power increased by about 5% for the star-delta connected windings compared with the conventional star connection. Moreover, the efficiency increased slightly by 0.20%. Probably the strongest advantage of the combined star-delta winding is observed when a phase fault occurs. When one phase is missing, for the same current, the star-delta connected motor keeps 80% of the rated torque in the healthy case, while the star connected motor only keeps 40%. Furthermore, the torque ripple of the star wound machine is extremely high in case of a missing phase, compared to the star-delta wound machine. Simulation results were validated by experimental results to show the effectiveness of the star-delta connected windings on the SynRM.},
  author       = {Ibrahim, Mohamed Nabil Fathy and Sergeant, Peter and Rashad, Essam Eddin M},
  issn         = {0885-8969},
  journal      = {IEEE TRANSACTIONS ON ENERGY CONVERSION},
  keywords     = {Synchronous Reluctance Motor,FEM,Performance,modelling,Star-delta connected windings,MAGNETIC SATURATION,MACHINE,TORQUE,COMPENSATION,DRIVES,DESIGN},
  language     = {eng},
  number       = {4},
  pages        = {1479--1487},
  title        = {Combined star-delta windings to improve synchronous reluctance motor performance},
  url          = {http://dx.doi.org/10.1109/TEC.2016.2576641},
  volume       = {31},
  year         = {2016},
}

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