Kiwoo Park, Kyo-Beum Lee, and Frede Blaabjerg, “Improving Output Performance of a Z-Source Sparse Matrix Converter Under Unbalanced Input-Voltage Conditions,” IEEE Transactions on Power Electronics, vol. 27, no. 4, pp. 2043–2054, Apr. 2012. -SCI > Paper

In this paper, we present a novel Z-source sparse matrix converter (ZSMC) and a compensation method based on a fuzzy logic

controller to compensate unbalanced input voltages. The ZSMC is developed based on the structure of an SMC to reduce the

number of unipolar power semiconductor switches and employs a Z-source network to overcome the inherent limitation of the low

voltage transfer ratio of conventional matrix converters. Although the ZSMC is a two-stage converter, it directly connects between a

source and a load through a Z-source network, which is designed to have smaller passive components as the only purpose is voltage

boosting. Therefore, the output of the ZSMC is directly affected by disturbances of the input-voltage source. The operational principle

of the ZSMC is described and its modulation strategy is explained. Simulation and experimental results are shown to verify the

feasibility of the ZSMC and its compensation method.