A New Method to Minimize Overall Torque Ripple in the Presence of Phase Current Shift Error for Three-Phase BLDC Motor Drive

ABSTRACT:

 

Torque ripple is always problematic in brushless dc (BLDC) motor drive. It is caused by nonsymmetric commutating phase current rate and phase current shift error. The latter is inevitable even in the latest sensor/sensorless BLDC motor control and drive. In this paper, a simple, robust, and low-cost method of minimizing overall torque ripple in the presence of phase current shift error is presented. It works and manages well to maintain the torque ripple increase within 10% even with 27° phase current shift, compared with more than 25% torque ripple increase without any compensator. The proposed technique is theoretically elucidated in detail, and the performance is verified via MATLAB/Simulink simulation and experiments.

KEYWORDS:

1.      Brushless rotating machines

2.      Dc motor drives

3.      Inverters

4.      Minimization methods

5.       Phase shifters

SOFTWARE: MATLAB/SIMULINK

 CONCLUSION:

In this paper, the proposed method reveals its suitability for reducing overall torque ripple caused by phase current shift error and nonsymmetric commutating phase currents. The proposed method is simulated with MATLAB/Simulink and experimentally verified. It reduces overall torque ripple for the BLDC drive system if any phase current shift error occurs.

REFERENCES:

[1] G.-J. Su and J. W. McKeever, “Low-cost sensorless control of brushless DC motors with improved speed range,” IEEE Trans. Power Electron., vol. 19, no. 2, pp. 296–302, Mar. 2004.

[2] K. Tabarraee, J. Iyer, S. Chiniforoosh, and J. Jatskevich, “Comparison of brushless DC motors with trapezoidal and sinusoidal back-EMF,” in Proc. 24th Can. Conf. Elect. Comput. Eng. (CCECE), Niagara Falls, ON, Canada, May 2011, pp. 803–806.

[3] H. Lu, L. Zhang, and W. Qu, “A new torque control method for torque ripple minimization of BLDC motors with un-ideal back EMF,” IEEE Trans. Power Electron., vol. 23, no. 2, pp. 950–958, Mar. 2008.

[4] Y.-K. Lin and Y.-S. Lai, “Pulsewidth modulation technique for BLDCM drives to reduce commutation torque ripple without calculation of commutation time,” IEEE Trans. Ind. Appl., vol. 47, no. 4, pp. 1786–1793, Jul./Aug. 2011.

[5] J. Shi and T.-C. Li, “New method to eliminate commutation torque ripple of brushless DC motor with minimum commutation time,” IEEE Trans. Ind. Electron., vol. 60, no. 6, pp. 2139–2146, Jun. 2013