access icon free Influence of sleeve conductivity on starting performance of high-speed permanent magnet synchronous starter generator for micro-gas turbine

© The Institution of Engineering and Technology
Received 28/04/2020, Accepted 03/07/2020, Revised 23/06/2020, Published 17/07/2020

High-speed permanent magnet synchronous machine is often used as a starter generator for a single-shaft micro-gas turbine due to its high efficiency and high-power density. However, when the machine works in the starting mode, it usually needs a complex control system to start since the machine cannot realise self-starting. Therefore, here, a dual-purpose rotor sleeve is proposed for the machine to have the starting ability. Furthermore, the dynamic response speed of the machine also can be improved by optimising the electromagnetic characteristics of the sleeve. Taking a 40 kW, 20,000 r/min surface-mounted permanent magnet machine as an example, the two-dimensional finite element model of the machine is established. The start-up time and locked rotor parameters under different sleeve conductivities are studied by the finite element method. In order to find out the reason for the change of starting performance, the rotor eddy current distribution is studied. Furthermore, the starting torque of the machine is decoupling analyzed, and the influence of sleeve conductivity on various kinds of torques are found to reveal the influence mechanism of sleeve conductivity on starting performance. Finally, the correctness of the model is verified by experiments.

Inspec keywords: eddy current losses; air gaps; synchronous generators; eddy currents; permanent magnet machines; shafts; synchronous machines; starting; permanent magnet motors; rotors; gas turbines; finite element analysis

Other keywords: starting mode; dual-purpose rotor sleeve; high-power density; microgas turbine; dynamic response speed; high-speed permanent magnet synchronous starter generator; power 40.0 kW; different sleeve conductivities; sleeve conductivity; complex control system; high-speed permanent magnet synchronous machine; starting performance; starting ability; start-up time; rotor eddy current distribution; two-dimensional finite element model

Subjects: Mechanical components; a.c. machines; Control of electric power systems; Synchronous machines; Finite element analysis; Numerical analysis

References

    1. 1)
      • 21. Chalmers, B.J., Hamdi, E.S.: ‘Multi-layer analysis of composite-rotor induction machines’, Electr. Mach. Power Syst., 2007, 7, (5), pp. 331–338.
    2. 2)
      • 25. Hassanpour Isfahani, A., Vaez-Zadeh, S.: ‘Effects of magnetizing inductance on start-up and synchronization of line-start permanent-magnet synchronous motors’, IEEE Trans. Magn., 2011, 47, (4), pp. 823–829.
    3. 3)
      • 24. Zhongliang, T.: ‘The influence of solid rotor material and its double-layer combination on the motor performance’, Electrotech. J., 1994, 3, pp. 16–19 (in Chinese).
    4. 4)
      • 14. Song, X., Han, B., Zheng, S., et al: ‘A novel sensorless rotor position detection method for high-speed surface PM motors in a wide speed range’, IEEE Trans. Power Electron., 2018, 33, (8), pp. 7083–7093.
    5. 5)
      • 4. Chen, L., Zhu, C., Zhong, Z., et al: ‘Rotor strength analysis for high-speed segmented surface-mounted permanent magnet synchronous machines’, IET Electr. Power Appl., 2018, 12, (7), pp. 979–990.
    6. 6)
      • 11. Fengxiang, W., Wenpeng, Z., Ming, Z., et al: ‘Design considerations of high-speed PM generators for micro turbines’. Proc. Int. Conf. on Power System Technology, Kunming, 2002, pp. 158–162.
    7. 7)
      • 23. Freeman, E.M.: ‘Travelling waves in induction machines: input impedance and equivalent circuits’, Proc. Inst. Electr. Eng., 1968, 115, (12), pp. 1772–1776.
    8. 8)
      • 12. Zhao, L., Ham, C.H., Han, Q., et al: ‘Design of optimal digital controller for stable super-high-speed permanent-magnet synchronous motor’, IEE Proc. Electr. Power Appl., 2006, 153, (2), pp. 213–218.
    9. 9)
      • 5. Zhang, H., Zhang, X., Gerada, C., et al: ‘Design considerations for the tooth shoe shape for high-speed permanent magnet generators’, IEEE Trans. Magn., 2015, 51, (11), pp. 1–4.
    10. 10)
      • 15. Sangsefidi, Y., Ziaeinejad, S., Mehrizi-Sani, A.: ‘Sensorless speed control of synchronous motors: analysis and mitigation of stator resistance error’, IEEE Trans. Energy Convers., 2016, 31, (2), pp. 540–548.
    11. 11)
      • 3. Li, Y., Guo, H., Xie, Q., et al: ‘Sensorless control method for the high speed permanent magnet synchronous starter-generator used in microturbine generation system’. 2011 Int. Conf. on Electrical and Control Engineering, Yichang, 2011, pp. 2545–2549.
    12. 12)
      • 20. Gieras, J.F., Saari, J.: ‘Performance calculation for a high-speed solid-rotor induction moto’, IEEE Trans. Ind. Electron., 2012, 59, (6), pp. 2689–2700.
    13. 13)
      • 8. Jung, D., Lee, J., Kim, J., et al: ‘Design method of an ultrahigh speed PM motor/generator for electric-turbo compounding system’, IEEE Trans. Appl. Supercond., 2018, 28, (3), pp. 1–4.
    14. 14)
      • 18. Zhang, F., Dai, R., Liu, G., et al: ‘Design of HSIPMM based on multi-physics fields’, IET Electr. Power Appl., 2018, 12, (8), pp. 1098–1103.
    15. 15)
      • 16. Kim, J., Jeong, I., Nam, K., et al: ‘Sensorless control of PMSM in a high-speed region considering iron loss’, IEEE Trans. Ind. Electron., 2015, 62, (10), pp. 6151–6159.
    16. 16)
      • 19. Boughrara, K., Dubas, F., Ibtiouen, R.: ‘2-D analytical prediction of eddy currents, circuit model parameters, and steady-state performances in solid rotor induction motors’, IEEE Trans. Magn., 2014, 50, (12), pp. 1–14.
    17. 17)
      • 1. Koleini, I., Roudbari, A., Marefat, V.: ‘EGT prediction of a micro gas turbine using statistical and artificial intelligence approach’, IEEE Aerosp. Electron. Syst. Mag., 2018, 33, (7), pp. 4–13.
    18. 18)
      • 2. Saha, A.K., Chowdhury, S., Chowdhury, S.P., et al: ‘Modeling and performance analysis of a microturbine as a distributed energy resource’, IEEE Trans. Energy Convers., 2009, 24, (2), pp. 529–538.
    19. 19)
      • 13. Song, X., Fang, J., Han, B.: ‘High-precision rotor position detection for high-speed surface PMSM drive based on linear hall-effect sensors’, IEEE Trans. Power Electron., 2016, 31, (7), pp. 4720–4731.
    20. 20)
      • 7. Fernando, N., Arumugam, P., Gerada, C.: ‘Design of a stator for a high-speed turbo-generator with fixed permanent magnet rotor radius and volt–ampere constraints’, IEEE Trans. Energy Convers., 2018, 33, (3), pp. 1311–1320.
    21. 21)
      • 17. Morimoto, M., Aiba, K., Sakurai, T., et al: ‘Position sensorless starting of super high-speed PM generator for micro gas turbine’, IEEE Trans. Ind. Electron., 2006, 53, (2), pp. 415–420.
    22. 22)
      • 22. Gieras, J.F.: ‘Analysis of multilayer rotor induction motor with higher space harmonics taken into account’, IEE Proc. B Electr. Power Appl., 1991, 138, (2), pp. 59–67.
    23. 23)
      • 6. Li, J., Zhang, X., Zhang, H., et al: ‘Control integrated studies on high speed permanent magnetic generators system’, IEEE Trans. Magn., 2015, 51, (11), pp. 1–4.
    24. 24)
      • 9. Hongbo, Q., Ran, Y., Weili, L., et al: ‘Influence of rectifiers on high-speed permanent magnet generator electromagnetic and temperature fields in distributed power generation systems’, IEEE Trans. Energy Convers., 2015, 30, (2), pp. 655–662.
    25. 25)
      • 10. Qiu, H., Tang, B., Yu, W., et al: ‘Analysis of the super high-speed permanent magnet generator under unbalanced load condition’, IET Electr. Power Appl., 2017, 11, (8), pp. 1492–1498.
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