Adaptive Sliding Mode Observer for Back-EMF in Direct Torque Control of Brushless DC Motor

Abstract:

The key issue of feedback torque calculation in BLDCM-DTC system is how to get the accurate estimation of back-emf. The influences form the deviation of resistance and inductance on traditional back-emf sliding mode observer (SMO) and relevant torque observation results are analyzed. To advance the accuracy of the torque estimation, an adaptive sliding mode observer is designed to estimate the back-emf of the BLDCM and then get torque estimation from the back-emf estimation. The proposed sliding mode observer can also implement the online identification of the stator resistance and inductance simultaneously. Simulation results demonstrate the proposed method is valid and effective.

• Periodical: Advanced Materials Research (Volumes 850-851)
• Pages: 572-575
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.850-851.572
• Online since: December 2013
• Authors: Song Lin Wang*, Shun Yi Xie
• Keywords: Back-EMF Observer, Brushless Dc Motor (BLDCM), Direct Torque Control (DTC), Sliding Mode Observer (SMO)

References

[1] S. J. Park, H. W. Park, M. H. Lee, and F. Harashima: A New Approach for Minimum-Torque-Ripple Maximum-Efficiency Control of BLDC Motor. IEEE Trans. Ind. Electron, 2000. Vol. 47, No. 4, pp.109-113.

DOI: 10.1109/41.824132

[2] Y. Liu, Z. Q. Zhu and D. Howe: Direct Torque Control of Brushless DC Drives with Reduced Torque Ripple. IEEE Trans. Ind App, 2005. Vol. 41, No. 2, pp.599-608.

DOI: 10.1109/tia.2005.844853

[3] S. J. Kang and S. K. Sul: Direct torque control of brushless DC motor with nonideal trapezoidal back EMF. IEEE Trans. Power Electron, 1995. Vol. 10, No. 6, pp.796-802.

DOI: 10.1109/63.471301

[4] Y. Liu, Z. Q. Zhu and D. Howe: Commutation-Torque-Ripple Minimization in Direct Torque Controlled PM Brushless DC Drives. IEEE Trans. Ind App. Vol. 43, No. 4, pp.1012-1021. (2007).

DOI: 10.1109/tia.2007.900474

[5] S. B. Qzturk and H. A. Toliyat: Direct torque and indirect flux control of burshless DC motor. IEEE/ASME Transactions On mechatronics, 2011. Vol. 16, No. 2, pp.351-360.

DOI: 10.1109/tmech.2010.2043742

[6] S. B. Ozturk and H. A. Toliyat, Sensorless Direct Torque and Indirect Flux Control of Brushless DC Motor with Non-sinusoidal Back-EMF, IEEE International Industrial Electronics, 2008. Vol 3. pp.1373-1378.

DOI: 10.1109/iecon.2008.4758154

[7] A. B. Proca and A. Keyhani: Sliding-mode flux observer with online rotor parameter estimation for inductionmotors. IEEE Trans. on Industrial electronices, 2007. Vol. 54, No. 2, pp.716-723.

DOI: 10.1109/tie.2007.891786

[8] Y. Liu, Z. Q. Zhu and D. Howe: Instantancous torque estimation in sensorless direct torque controlled brushless DC motors. IEEE Trans. Ind App, 2006. Nol. 42, No. 5, pp.1275-1283.

DOI: 10.1109/tia.2006.880854