The Influence of DC-Link Voltage on Commutation Torque Ripple of Brushless DC Motors with Two-Segment Pulse-width Modulation Control Method

Authors

Faculty of Electrical and Computer Engineering, Babol Noshirvani University of Technology, Babol, Iran

Abstract

The commutation process causes current ripple to be generated in the drive system of brushless DC (BLDC) motor. This, in turn, leads to output torque ripple. Mechanical vibration and acoustic noise are its influences which are undesirable phenomenon in some applications. A new method is presented in this paper which reduces torque ripple and commutation period in the entire range of motor speed. This method is designed and implemented based on two-segment pulse-width modulation (PWM) and DC-link voltage doubling during commutation. Based on the presented theory and given the influence of DC-link voltage on ripple magnitude, some experiments are carried out in which simultaneous association of the above mentioned factors in reducing current ripple and commutation time in the entire speed range of rotor has been proved. The experimental results show that the current ripple magnitude in high speed range is almost 20 times less than conventional method based on H-PWM_L-ON technique.

Keywords


1.     Carlson, R., Lajoie-Mazenc, M. and Fagundes, J., "Analysis of torque ripple due to phase commutation in brushless dc machines", IEEE Transactions on Industry Applications,  Vol. 28, No. 3, (1992), 632-638.

2.     Lin, Y.-K. and Lai, Y.-S., "Pulsewidth modulation technique for bldcm drives to reduce commutation torque ripple without calculation of commutation time", IEEE Transactions on Industry Applications,  Vol. 47, No. 4, (2011), 1786-1793.

3.     Lu, H., Zhang, L. and Qu, W., "A new torque control method for torque ripple minimization of bldc motors with un-ideal back emf", IEEE Transactions on Power Electronics,  Vol. 23, No. 2, (2008), 950-958.

4.     Shi, T., Guo, Y., Song, P. and Xia, C., "A new approach of minimizing commutation torque ripple for brushless dc motor based on dc–dc converter", IEEE Transactions on Industrial Electronics,  Vol. 57, No. 10, (2010), 3483-3490.

5.     Fang, J., Zhou, X. and Liu, G., "Precise accelerated torque control for small inductance brushless dc motor", IEEE Transactions on Power Electronics,  Vol. 28, No. 3, (2013), 1400-1412.

6.     Xia, C., Xiao, Y., Chen, W. and Shi, T., "Torque ripple reduction in brushless dc drives based on reference current optimization using integral variable structure control", IEEE Transactions on Industrial Electronics,  Vol. 61, No. 2, (2014), 738-752.

7.     Shi, J. and Li, T.-C., "New method to eliminate commutation torque ripple of brushless dc motor with minimum commutation time", IEEE Transactions on Industrial Electronics,  Vol. 60, No. 6, (2013), 2139-2146.

8.     Xu, Y., Wei, Y., Wang, B. and Zou, J., "A novel inverter topology for brushless dc motor drive to shorten commutation time", IEEE Transactions on Industrial Electronics,  Vol. 63, No. 2, (2016), 796-807.

9.     Shao, J., Nolan, D., Teissier, M. and Swanson, D., "A novel microcontroller-based sensorless brushless dc (bldc) motor drive for automotive fuel pumps", IEEE Transactions on Industry Applications,  Vol. 39, No. 6, (2003), 1734-1740.