access icon free Position sensorless startup for doubly salient electro-magnetic motor with only one test pulse

© The Institution of Engineering and Technology
Received 04/01/2017, Accepted 11/05/2017, Revised 26/04/2017, Published 17/05/2017

The self-inductance of doubly salient electro-magnetic motor (DSEM) varies with rotor position, so it's becoming an effective approach to estimate rotor position in DSEM sensorless drive system. Based on the feature that there must be a change in the magnitude relation of two phase self-inductances when the rotor goes from one sector to the other, this study proposes a novel rotor position estimation method for DSEM sensorless startup, it needs only one test pulse injection. The proposed method starts with injecting a test voltage pulse in all three-phase windings by turning on three proper transistors a certain time synchronously. Then at the end of the test pulse, the response currents of the two parallel-connected phases are sampled and compared for judging whether the rotor has reached the commutation instant. Moreover, the rotor position estimation error and output torque of the pulse-injection-based methods are theoretically analysed. Compared with the conventional rotor position estimating method which requires multiple test pulses, the proposed strategy has merits of less test time consuming, higher-accurate commutation, greater output torque and superior startup performance. Finally, the experiments on a 12/8-pole DSEM confirm the correctness and flexibility of the proposed method.

Inspec keywords: torque motors; estimation theory; transistors; commutation; rotors; motor drives; electromagnetic devices; machine testing

Other keywords: commutation; two phase self-inductance; three-phase winding; transistor; doubly salient electromagnetic motor; one test pulse-injection-based method; DSEM sensorless drive system; position sensorless startup; rotor position estimation error method; parallel-connected phase sample

Subjects: Electromagnetic device applications; d.c. machines; Drives; a.c. machines

References

    1. 1)
      • 11. Zhao, Y., Wang, H., Zhang, H., et al: ‘Position-sensorless control of DC + AC stator fed doubly salient electromagnetic motor covered full speed range’, IEEE Trans. Ind. Electron., 2015, 62, (12), pp. 7412–7423.
    2. 2)
      • 13. Hu, K., Chen, Y., Liaw, C.: ‘A reversible position sensorless controlled switched-reluctance motor with adaptive and intuitive commutation tunings’, IEEE Trans. Power Electron., 2015, 30, (7), pp. 3781–3793.
    3. 3)
      • 3. Shi, L., Zhou, B.: ‘Analysis of a new five-phase fault-tolerant doubly salient brushless DC generator’, IET Electr. Power Appl., 2016, 10, (7), pp. 633–640.
    4. 4)
      • 2. Yu, L., Zhang, Z., Chen, Z., et al: ‘Analysis and verification of the doubly salient brushless DC generator for automobile auxiliary power unit application’, IEEE Trans. Ind. Electron., 2014, 61, (12), pp. 6655–6663.
    5. 5)
      • 7. Zhang, Z., Yu, L., Wang, Y., et al: ‘Overview and design methodology of doubly salient brushless dc generators with stator-field winding’, IET Electr. Power Appl., 2017, 11, (2), pp. 197–211.
    6. 6)
      • 4. Zhao, Y., Wang, H., Xiao, L.: ‘Investigation of fault-tolerant capability of five-phase doubly salient electromagnetic generator’, IET Electr. Power Appl., 2015, 9, (1), pp. 80–93.
    7. 7)
      • 9. Zhou, X., Zhou, B., Guo, H., et al: ‘Research on sensorless and advanced angle control strategies for doubly salient electro-magnetic motor’, IET Electr. Power Appl., 2016, 10, (5), pp. 375–383.
    8. 8)
      • 8. Zhao, Y., Wang, H., Xiao, L., et al: ‘Sensorless control of doubly salient electromagnetic machine based on coordinate transformation’. Proc. 40th Annual Conf. of the IEEE Industrial Electronics Society (IECON), Dallas, America, October 2014, pp. 838–843.
    9. 9)
      • 1. Chen, Z., Wang, B., Chen, Z., et al: ‘Comparison of flux regulation ability of the hybrid excitation doubly salient machines’, IEEE Trans. Ind. Electron., 2014, 61, (7), pp. 3155–3166.
    10. 10)
      • 6. Fan, Y., Chau, K.T.: ‘Design, modeling and analysis of a brushless doubly-fed doubly salient machine for electric vehicles’. Proc. Fourteenth IAS Annual Meeting Conf. of the 2005 Industry Applications Conf., Hong Kong, China, October 2005, pp. 2712–2719.
    11. 11)
      • 12. Ernest, O., Tausif, H., Yilmaz, S., et al: ‘A pulse-injection-based sensorless position estimation method for a switched reluctance machine over a wide speed range’, IEEE Trans. Ind. Appl., 2015, 51, (5), pp. 3867–3876.
    12. 12)
      • 17. Prasit, C., Pakasit, S., Pongpit, W., et al: ‘Initial rotor position estimation of sensorless brushless DC drives’, IEEE Trans. Ind. Appl., 2009, 45, (4), pp. 1318–1324.
    13. 13)
      • 15. Lorincz Istvan, R., Coroban-Schramel, V., Tiponut, V.: ‘A novel initial rotor-position estimation method for BLDC motors based on four voltage pulses’. Proc. 12th Int. Conf. on Optimization of Electrical and Electronic Equipment (OPTIM), Basov, Romania, May 2010, pp. 512–519.
    14. 14)
      • 18. Dai, W., Tian, H., Ding, J.: ‘Phase-shifted and interleaved angle control for doubly salient electro-magnetic machine’. Proc. 14th Int. Conf. on Control, Automation and Systems (ICCAS), Seoul, Korea, October 2014, pp. 36–41.
    15. 15)
      • 5. Zhang, Z., Yu, L., Sun, L., et al: ‘Iron loss analysis of doubly salient brushless DC generators’, IEEE Trans. Ind. Electron., 2015, 62, (4), pp. 2156–2163.
    16. 16)
      • 10. Zhou, X., Zhou, B., Yang, L., et al: ‘Compensation for rotor position detection error in sensorless DSEM drive based on line-voltage difference’. Proc. 42nd Annual Conf. of the IEEE Industrial Electronics Society (IECON), Florence, Italy, October 2016, pp. 2725–2730.
    17. 17)
      • 14. Wook-Jin, L., Seung-Ki, S.: ‘A new starting method of BLDC motors without position sensor’, IEEE Trans. Ind. Appl., 2016, 42, (6), pp. 1532–2538.
    18. 18)
      • 16. Omar, S., Miroslav, M., Yves, P.: ‘First-pulse technique for brushelss DC motor standstill position detection based on iron B-H hysteresis’, IEEE Trans. Ind. Electron., 2012, 59, (5), pp. 2319–2328.
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