Speed control of 3-phase Induction motor fed through direct matrix converter using GSPWM technique with unity input power factor

This paper illustrates the method of speed control of three phase Induction motor using V/F control method which is fed through the direct matrix converter. To make the input power factor unity, the rectifier side of the direct matrix converter is controlled through GSPWM technique. The main advantage of using the direct matrix converter is that the dc-link storage is removed in the proposed one which makes the system rugged, robust and maintenance free. Apart from that, the use of GSPWM technique has drastically reduced the switching losses as explained. The controlling is also efficiently improved and hence the phase current waveform obtained is sinusoidal as desired with less harmonic content. Also, the input power factor obtained with the proposed technique comes out to be unity which definitely improves the power quality fed to the Induction motor. Simulation is carried out in MATLAB/SIMULINK and the results show the effectiveness and efficiency of the proposed converter.