Multi-sector Prediction Interpolation Function for BLDC Motor Torque Ripple Control
The Brushless DC Motor(BLDCM)is broadly used due to its high reliability and efficiency.However,there will be high torque ripple because of its own structure and drive characteristics in the process of operation.Focused on the problem,a novel multi-sector subdivision look-up-table function for the voltage vector was proposed,which was used for the Direct Torque Control(DTC)of BLDCM.Firstly,in this pa-per,based on the traditional DTC that only divides the voltage vector into six sectors,the novel DTC strategy created a look-up-table of twelve-sectors.Secondly,on the basis of twelve sectors,the effective voltage vec-tors increase to twelve and thus,the torque of BLDCM was able to select more accurate voltage vectors in each sector.Finally,the method restrained the torque ripple of BLDCM during the period of commutation and increased efficiency of the direct torque control scheme based on the 3D interpolation characteristic curves.The proposed control technology was verified by the simulation results.
万方数据
维普
