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Torque Ripple Suppression Method for BLDCM Drive Based on Four-Switch Three-Phase Inverter
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  • Journal title : Journal of Power Electronics
  • Volume 15, Issue 4,  2015, pp.974-986
  • Publisher : The Korean Institute of Power Electronics
  • DOI : 10.6113/JPE.2015.15.4.974
 Title & Authors
Torque Ripple Suppression Method for BLDCM Drive Based on Four-Switch Three-Phase Inverter
Pan, Lei; Sun, Hexu; Wang, Beibei; Su, Gang; Wang, Xiuli; Peng, Guili;
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 Abstract
A novel inverter fault-tolerant control scheme is proposed to drive brushless DC motor. A fault-tolerant inverter and its three fault-tolerant schemes (i.e., phase A fault-tolerant, phase B fault-tolerant, and phase C fault-tolerant) are analyzed. Eight voltage vectors are summarized and a voltage vector selection table is used in the control scheme to improve the midpoint current of the split capacitors. A stator flux observer is proposed. The observer can improve flux estimation, which does not require any speed adaptation mechanism and is immune to speed estimation error. Global stability of the flux observer is guaranteed by the Lyapunov stability analysis. A novel stator resistance estimator is incorporated into the sensorless drive to compensate for the effects of stator resistance variation. DC offset effects are mitigated by introducing an integral component in the observer gains. Finally, a control system based on the control scheme is established. Simulation and experiment results show that the method is correct and feasible.
 Keywords
DC offset;Fault-tolerant inverter;Flux observer;Stator resistance;Voltage space vector;
 Language
English
 Cited by
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