Beat-suppression Method of Traction Motor Based on q-axis Current Compensation
In order to meet the lightweight requirements of electric traction converter,this paper focused on the beat-frequency suppression method of traction motor when there was no LC resonant circuit in DC-link.Firstly,the characteristics of DC-link voltage ripple with twice of the grid frequency were studied.On this basis,the influence of voltage ripple on motor current in the d-q coordinate system was analyzed.Secondly,a beat-frequency suppression method of traction motor based on q-axis current compensation was discussed.Finally,the HIL experimental platform was used to test and verify the method discussed in this paper.The simulation results showed that this method could reduce the torque ripple and current fluctuation caused by the ripple voltage of the traction converter DC link when there was no LC resonant circuit,so as to effectively suppress motor beat-frequency phenomenon.
traction drivelightweightbeat-frequency suppressionq-axis current
万方数据
维普
