A new control algorithm for matrix converters under distorted and unbalanced conditions

The matrix converter permits frequency conversion in a single-stage process. This paper presents a new algorithm for three-phase to three-phase AC/AC matrix converters based on least mean square errors (LMSE). This new method has no limitation on the output frequency as well as the harmonic content of the output voltage, which is significantly less than other classical method for matrix converters. The most important and valuable characteristics of this new algorithm is that even under unbalanced and significantly distorted input voltage waveforms, the output waveforms turn out to be reasonably clean and balanced. Therefore this converter can be used as an active filter. Using this new control method ensures that the switches do not short-circuit the voltage sources. Another advantage of this method is the minimum loss of converter because the number of switching, are minimized, and also this method has easy comprehension of the required commutation process and simplified control algorithm.