Research on Coal Mine Hoist DTC System Based on Matlab Simulation
Abstract：The conventional direct torque control has the shortages of unfixed switching frequency and high flux and torque ripple. To improve such weakness, adopts space vector modulation direct torque control strategy （SVM- DTC） based on a new flux observer. The control system introduces SVM unit and PI adjusters instead of switching table and hysteresis comparators and improves the torque and current waveform. A new flux observer based on phase lock loop is presented which can observe flux directly under rotating coordinate system and eliminate the delay of the phase and the saturation caused by traditional low pass filter observer. The simulation results verify the effectiveness and feasibility of the proposed strategy.
Keywords：space vector modulation direct torque controlpermanent magnet synchronous motorflux observerphase lock loop
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 15-17,23 )