A Novel Control Strategy for Matrix Converters in Over-modulation Range.

This paper proposes a control strategy for matrix converters to reduce the torque ripple in the over-modulation range. In the over-modulation range, motor drive performance of matrix converters is deteriorated because of the output voltage saturation. Especially, the torque ripple which has lower frequency components than the input voltage frequency is remarkable. In this paper, the theoretical analysis about the causes of the torque ripple and the effect of the proposed control strategy are shown. Experimental results verify the validity of the theoretical analysis and confirm the effectiveness of the proposed control strategy. Furthermore, the harmonic distortion of the output current is also reduced compared with another control strategy.