Torque ripple suppression of brushless DC motor drives using an alternating two‐phase and three‐phase conduction mode

Abstract

Commutation torque ripple is an important factor affecting the performance of brushless DC (BLDC) motor drives. In order to suppress this torque ripple, an alternating conduction control strategy between the two-phase and three-phase conduction mode has been proposed in this study. During the non-commutation periods, the conventional two-phase conduction mode is selected to drive the BLDC motor. While during the commutation period, the commutation torque ripple is reduced by employing an alternating two-phase and three-phase conduction mode. By calculating the duty cycle of the three-phase conduction mode, which indicates whether the rate of change in current in the incoming and outgoing phase is equal during the commutation interval, the commutation torque ripple is effectively reduced, while the current in the non-commutated phase is maintained constant. Simulation and experimental results show that the proposed method can suppress the commutation torque ripple efficiently, particularly at high rotational speeds of the motor.

Analysis of voltage vectors and realization method of torque ripple reduction for BLDCM

“…BLDCM DTC system has the advantages of simple structure, low influence by motor parameters and fast torque response. Meanwhile, the problem of torque ripple restricts the application of BLDCM in high‐precision position servo systems and high‐performance speed control systems [14].…”

A comparative analysis of torque ripple reduction techniques for sensor BLDC drive

“…A single -input-dual-output (SIDO) converter is investigated [18] in which two voltage sources are used to supply the inverter and to increase the voltage during commutation. A novel topology using two-phase and three-phase conduction modes are mentioned to decrease the ripple throughout the regular and commutation period respectively [19]. A fuzzy logic based PI controller is proposed for the comparative analysis of BLDC motor [20].…”

Electromagnetic Torque Ripple in Multiple Three-Phase Brushless DC Motors for Electric Vehicles

“…They are associated with the use of special topologies of power semiconductor converters, hybrid, modular, cascade, etc. [24][25][26], and special advanced methods of switching the armature winding of the machine [27][28][29]. The electromagnetic torque ripple of the modular multiple TP BLDC drive, to the best of the authors' knowledge, has not been studied in detail.…”