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When matrix converter works under unbalanced input voltages, sinusoidal input currents could be obtained if the input power factor angle in conventional control strategy is modified based on the positive and negative sequence components of input voltages. Some existing literature realized this goal by using sequence component separation, which was usually complicated and/or storage-consuming. Instead,...
There is an increasing interest in two-stage four-leg matrix converter (3×4TSMC) which provides a neutral connection for potential imbalanced loads. However, the fourth leg will worsen its operation performance unexpectedly, even if connected to the balanced loads. By means of analysis and calculation, it is found that the input filter capacitor voltage fluctuation will transfer to the output in the...
This paper presents a strategy of matrix converter driving three-phase brushless DC motor (BLDCM) with trapezoidal back electromotive force. The matrix converter is described as an equivalent circuit combining virtual rectifier stage and virtual inverter stage. Input current space vector modulation and 120deg conduction mode are employed in these two stages respectively. An important part of this...
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