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Commutation Torque Ripple Reduction in Open-end Winding BLDC Motor Drives

U. Hari Krishna (Indian Institute of Space Science and Technology), P. P. Rajeevan (Indian Institute of Space Science and Technology)

IEEE International Conference on Power Electronics, Drives and Energy Systems
Licence : non indiquée (tous droits réservés)

Résumé : This article introduces a two-level torque hysteresis-based direct torque control (DTC) strategy for a dual inverter-fed three-phase BLDC motor drive (BLDCMD) with open-end stator windings, incorporating a commutation torque ripple mitigation technique. The voltage space vectors generated while the inverters operate in 120-degree and 180-degree conduction modes are utilized to implement the DTC. An analysis of the torque ripple indicates that employing three-phase conducting voltage space vectors during the commutation interval in the DTC scheme substantially reduces commutation torque. Furthermore, the proposed method uses a unipolar-based switching scheme for torque control, which decreases dv/dt compared to a bipolar switching scheme. The motor's electromagnetic torque is maximized by utilizing a two-phase conducting voltage space vectors for torque control during the non-commutation interval. The proposed scheme is validated through simulations using MATLAB-Simulink software and experiment on a laboratory prototype.

Publié le 18 Déc. 2024