Modified steady-state modelling of brushless doubly-fed induction generator taking core loss components into account

Modified steady-state modelling of brushless doubly-fed induction generator taking core loss components into account

For access to this article, please select a purchase option:

Buy article PDF
(plus tax if applicable)
Buy Knowledge Pack
10 articles for $120.00
(plus taxes if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Your details
Why are you recommending this title?
Select reason:
IET Electric Power Applications — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

Brushless doubly-fed induction machine (BDFIM) has recently gained considerable research interests due to its promising features when incorporated as wind generator or variable speed drive. The BDFIM has two three-phase stator windings with different pole-pair numbers and excitation frequencies. The performance of the machine is based on the magnetic cross-coupling of rotating fields produced by the stator windings through a special squirrel cage rotor. Contrary to the conventional induction machine (IM), the rotor slip and frequency are high throughout the operating speed range. Hence, the rotor core loss cannot be ignored in the steady-state analysis. Although the core loss components have much more study of BDFIM. In this study, analytical expressions are individually derived for a number of core loss components caused by the complicated nature than those of an IM, the precise calculation of these components is important especially on the efficiency each stator winding field. Then, the modified steady-state electric equivalent model is developed by considering the components. The experiments and finite element analysis based on a 3kW prototype BDFIM verify the accuracy of the proposed model.


    1. 1)
      • 1. McMahon, R.A., Roberts, P.C., Wang, X., et al: ‘Performance of BDFM as generator and motor’, IEE Proc., Electr. Power Appl., 2006, 153, (2), pp. 289299.
    2. 2)
      • 2. Han, P., Cheng, M., Ademi, S., et al: ‘Brushless doubly-fed machines: opportunities and challenges’, CMP J. Mag., 2018, 4, (2), pp. 117.
    3. 3)
      • 3. Zhang, F., Yu, S., Wang, Y., et al: ‘Design and performance comparisons of brushless doubly-fed generators with different rotor structures’, IEEE Trans. Ind. Electron., 2019, 66, (1), pp. 631640.
    4. 4)
      • 4. Mosaddegh, H., Abootorabi Zarchi, H.: ‘Maximum torque per ampere control of brushless doubly fed induction generator using variable structure approach for wind turbine applications’, J. Electr. Syst. Signals, 2015, 3, (1), pp. 18.
    5. 5)
      • 5. Roberts, P.C.: ‘A study of Brushless Doubly-fed (induction) machines’. PhD thesis, University of Cambridge, 2005.
    6. 6)
      • 6. Wang, X.: ‘Modeling and design of brushless doubly-fed induction machines’. PhD thesis, Delft University of Technology, 2017.
    7. 7)
      • 7. Ferreira, A.C., Williamson, S.: ‘Time-stepping finite element analysis of brushless doubly-fed machine taking core loss and saturation into account’, IEEE Trans. Ind. Appl., 1999, 35, (3), pp. 583588.
    8. 8)
      • 8. Ahmadian, M., Jandaghi, B., Oraee, H.: ‘Hysteresis loss in brushless doubly fed induction machines’, Renew. Energies Power Quality J., 2011, 1, (9), pp. 16.
    9. 9)
      • 9. Gorginpour, H., Oraee, H., Abdi, E.: ‘Calculation of core and stray load losses in brushless doubly-fed induction generators’, IEEE Trans. Ind. Electron., 2014, 61, (7), pp. 31673177.
    10. 10)
      • 10. Hashemnia, M.N., Tahami, F., Oyarbide, E.: ‘Investigation of core loss effect on steady-state characteristics of inverter fed brushless doubly-fed machines’, IEEE Trans. Energy Convers., 2014, 29, (1), pp. 5764.
    11. 11)
      • 11. Basic, D., Zhu, J.G., Boardman, G.: ‘Modeling and steady-state performance analysis of a brushless doubly-fed twin stator induction generator’. Proc. Int. Conf. Power Eng., Melbourne, VIC, Australia, September 2002, pp. 16.
    12. 12)
      • 12. Wang, W., Kiani, M., Fahimi, B.: ‘Optimal design of doubly-fed induction generators using field reconstruction method’, IEEE Trans. Magn., 2010, 46, (8), pp. 34533456.
    13. 13)
      • 13. Cardenas, R., Pena, R., Alepuz, Z., et al: ‘Overview of control systems for the operation of DFIGs in wind energy applications’, IEEE Trans. Ind. Electron., 2013, 60, (7), pp. 27762797.
    14. 14)
      • 14. Gorginpour, H., Jandaghi, B., Oraee, H.: ‘A novel rotor configuration for brushless doubly-fed induction generators’, IET Electr. Power Appl., 2013, 7, (2), pp. 106115.
    15. 15)
      • 15. Amiri, N., Madani, S.M., Lipo, T.A., et al: ‘An improved direct decoupled power control of doubly fed induction machine without rotor position sensor and with robustness to parameter variation’, IEEE Trans. Energy Convers., 2012, 27, (4), pp. 873884.
    16. 16)
      • 16. Strous, T.D., Wang, X., Polinder, H., et al: ‘Brushless doubly-fed induction machines: magnetic field analysis’, IEEE Trans. Magn., 2016, 52, (11), pp. 110.
    17. 17)
      • 17. McMahon, R.A., Wang, X., Abdi-Jalebi, E., et al: ‘The BDFM as a generator in wind turbines’. Proc. Int. Conf. Power Electronics and Motion Control, Portoroz, Slovenia, August 2006, pp. 18591865.
    18. 18)
      • 18. Wallace, A.K., Spee, R., Alexander, G.C.: ‘The brushless doubly-fed machine: its advantages, applications and design methods’. Proc. Int. Conf. Electrical Machines and Drives, Oxford, UK, September 1993, pp. 511517.
    19. 19)
      • 19. Sadeghi, R., Madani, S.M., Ataei, M.: ‘A new smooth synchronization of brushless doubly-fed induction generator by applying a proposed machine model’, IEEE Trans. Sustain. Energy, 2018, 9, (1), pp. 371380.
    20. 20)
      • 20. Tohidi, S.: ‘Analysis and simplified modelling of brushless doubly-fed induction machine in synchronous mode of operation’, IET Electr. Power Appl., 2016, 10, (2), pp. 110116.
    21. 21)
      • 21. Reinert, J., Brockmeyer, A., De Doncker, R.W.A.A.: ‘Calculation of losses in ferro- and ferrimagnetic materials based on the modified Steinmetz equation’, IEEE Trans. Ind. Appl., 2001, 37, (4), pp. 10551061.
    22. 22)
      • 22. Agamloh, E.B.: ‘An evaluation of induction machine stray load loss from collated test results’, IEEE Trans. Ind., 2010, 46, (6), pp. 23112318.
    23. 23)
      • 23. Heller, B., Hamata, V.: ‘Harmonic field effects in induction machines’ (Elsevier Scientific Pub., Netherlands, 1977).
    24. 24)
      • 24. Roberts, P.C., McMahon, R.A., Tavner, P.J., et al: ‘Equivalent circuit for the brushless doubly fed machine (BDFM) including parameter estimation and experimental verification’, IEE Proc., Electr. Power Appl., 2005, 152, (4), pp. 933942.
    25. 25)
      • 25. Tohidi, S., Zolghadri, M.R., Oraee, H., et al: ‘Performance of the brushless doubly-fed machine under normal and fault conditions’, IET Electr. Power Appl., 2012, 6, (9), pp. 621627.
    26. 26)
      • 26. Williamson, S., Boger, M.: ‘Impact of inter-bar current on the performance of the brushless doubly-fed motor’, IEEE Trans. Ind. Appl., 1999, 35, (2), pp. 453460.
    27. 27)
      • 27. Boldea, I., Nasar, S.A.: ‘The induction machine handbook’ (CRC Press, New York, NY, USA, 2010, 2nd edn.), pp. 119141.

Related content

This is a required field
Please enter a valid email address