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Detection of Air Gap Eccentricity Faults Using Finite Element Analysis (FEA) in BLDC Motors

Gunjan sardana, Neelam Turk, Satvir Deswal


Abstract: - Detection of eccentricity faults has been feasible using physical and vibrational parameters. It is essential to detect and diagnose such faults at the early stage through measurement and monitoring of changes in the magnetic flux of the BLDC motor in the motor windings and stator slots. In this paper, brushless dc motor and its stator, rotor and windings are designed using FEA method .Changes in magnetic flux of each of the element in the motor are monitored in case of the change in the air gap between rotor and stator .Changes in the magnetic flux ,current are analysed using model of healthy and faulty motors with static and dynamic eccentricity faults. The results indicate detection of faults at the early stages of operation of BLDC motor. This early detection and correction  of faults will be useful in avoiding wear and tear .



Brushless DC motor; Air Gap Eccentricity Faults; FEA Magnetic Flux

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W. le Roux, R. G. Harley, and T. G. Habetler, “Detecting rotor faults in low power permanent magnet synchronous machines,” IEEE Trans. Power Electron., vol. 22, no. 1, pp. 322–328, Jan. 2007.

S. Rajagopalan, W. le Roux, T. G. Habetler, and R. G. Harley, “Dynamic Eccentricity and demagnetized rotor magnet detection in trapezoidal flux(brushless DC) motors operating under different load conditions,” IEEETrans. Power Electron., vol. 22, no. 5, pp. 2061–2069, Sep. 2007.

B. M. Ebrahimi, J. Faiz, and B. N. Araabi, “Pattern identification for eccentricity fault diagnosis in permanent magnet synchronous motors using stator current monitoring,” IET Electr. Power Appl., vol. 4, no. 6,pp. 418–430, Jul. 2010.

J. Rosero, J. Cusido, J. A. Ortega, A. Garcia, and L. Romeral, “On-line Condition monitoring technique for PMSM operated with eccentricity,” in Proc. IEEE Int. Symp. Diagnostics Electr. Mach., Power Electron. Drives,2007, pp. 95–100.

S. Rajagopalan, J. M. Aller, J. A. Restrepo, T. G. Habetler, and R.G. Harley, “Detection of rotor faults in brushless DC motors operating under non stationary conditions,” IEEE Trans. Ind. Appl., vol. 42, no. 6,pp. 1464–1477, Nov./Dec. 2006.

A. G. Espinosa, J. A. Rosero, J. Cusido, L. Romeral, and J. A. Ortega, “Fault Detection by means of Hilbert–Huang transformation of the stator current in a PMSM with demagnetization,” IEEE Trans. Energy Convers, vol. 25, no. 2, pp. 312–318, Jun. 2010.

J.Hong, D. Hyun, S. B. Lee, J.Yoo, and K. Lee, “Automated monitoring of magnet quality for permanent magnet synchronous motors at standstill,”IEEE Trans. Ind. Appl., vol. 46, no. 4, pp. 1397–1405, Jul./Aug. 2010.

B. M. Ebrahimi and J. Faiz, “Feature extraction for short-circuit fault detection in permanent-magnet synchronous motors using stator-current monitoring,” IEEE Trans. Power Electron., vol. 25, no. 10, pp. 2673 2682, Oct. 2010.

S.Yang, D. Xiang, A. Bryant, P.Mawby, L. Ran, and P. Tavner, “Condition monitoring for device reliability in power electronic converters :Are view,” IEEE Trans. Power Electron., vol. 25, no. 11, pp. 2734–2752, Nov. 2010.

F. Aghili, “Fault-tolerant torque control of BLDC motors,” IEEE Trans.Power Electron., vol. 26, no. 2, pp. 355–363, Feb. 2011.

M. A. Vogelsberger, T. Wiesinger, and H. Ertl, “Life-cycle monitoring and voltage-managing unit for DC-link electrolytic capacitors in PWM converters,” IEEE Trans. Power Electron., vol. 26, no. 2, pp. 493–503,Feb. 2011.

S. B. Lee, J. Yang, J. Hong, J.-Y. Yoo, B. Kim, K. Lee, J. Yun, M. Kim,K.-W. Lee, E. J. Wiedenbrug, and S. Nandi, “A new strategy for condition monitoring of adjustable speed induction machine drive systems,” IEEE Trans. Power Electron., vol. 26, no. 2, pp. 389–398, Feb. 2011

On-line detection of rotor faults in permanent magnet machines using only terminal quantities, Wiehan le Roux, Ph.D. thesis, Electrical and Computer Engineering, Georgia Institute of Technology, October 2002

Design a single-phase BLDC Motor and Finite-Element Analysis of Stator Slots Structure Effects on the Efficiency, Abdolamir Nekoubin, World Academy of Science, Engineering and Technology, International Journal of Electrical, Computer, Energetic, Electronic and Communication Engineering Vol:5, No:5, 2011

Detection of Airgap Eccentricity for Permanent Magnet Synchronous Motors Based on the d-Axis Inductance, Jongman Hong, Student Member, IEEE, Sang Bin Lee, Senior Member, IEEE amd Christian Kral, Senior Member, IEEE, and Anton Haumer, IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 27, NO. 5, MAY 2012

Design Of Three-Phase BLDC Motor and Finite Element Analysis of Stator Slots Structure Effects on the Efficiency,

Sriram Rajendran1, Ankur Gusain2, Shahnawaz Khan, Mrs. N. M. Rao 4, IJARIIE ,Vol. 2,Issue 3,2016

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