Induction motor drive with matrix converter

Control methods of the three-phase induction motor supplied by 3, 6, 9, ... phase matrix converters are investigated by means of using Park-vector representation. The motor voltage is only constructed from the possible rotated and zero value voltage vectors. It is shown that motor harmonic losses and torque pulsations can be kept at low values with the relatively low commutation frequency of the converter, but only for 6, 9, ... phase matrix converters and only with negative-type voltage waves. The symmetrical and the optimized pulse distributions are compared. The network currents are analysed. The proposed control method is very suitable for digital realization