TY - JOUR ID - 73122 TI - The Influence of DC-Link Voltage on Commutation Torque Ripple of Brushless DC Motors with Two-Segment Pulse-width Modulation Control Method JO - International Journal of Engineering JA - IJE LA - en SN - 1025-2495 AU - Gol, S AU - Ardeshir, G AU - Zahabi, M AU - Ale Ahmad, A AD - Faculty of Electrical and Computer Engineering, Babol Noshirvani University of Technology, Babol, Iran Y1 - 2018 PY - 2018 VL - 31 IS - 2 SP - 307 EP - 314 KW - Brushless DC Motors KW - motor drive system KW - commutation torque ripple KW - Pulse KW - Width Modulation KW - DC KW - link voltage DO - N2 - 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. UR - https://www.ije.ir/article_73122.html L1 - https://www.ije.ir/article_73122_823323963a2afafe286648d56110598a.pdf ER -