Abstract

As the matrix converter performs electric energy direct transfer from the input to the output, the distortion and the unbalance of the input voltages affects directly the output of the matrix converter. This paper presents a new and simple current control for matrix converter based on the fact that if the magnitude of the output current space vector is constant, the output currents are sinusoidal and balanced. With this current control, it is possible to compensate the output of the matrix converter under unbalanced and distorted input voltage conditions without the need of symmetrical components decomposition of the input voltage or reference frame conversions. So it is not necessary heavy computation capability and the hardware implementation is very simple. The proposed current control scheme employs only one PI regulator and since that the space vector modulation is applied in this control, the switching frequency of the converter is kept constant

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