Direct Power Control Based Matrix Converter and Its Operation Characteristics

This paper proposes a novel control strategy of a matrix converter, which features direct instantaneous-active- and reactive-power control of the converter. The power can directly be regulated by selecting an optimum switching state with a relay (bang-bang) control algorithm; thus an ultimately high-speed response of the power control is achieved. A theoretical aspect of the control is discussed, and some computer simulation results are presented to confirm the basic controllability of the technique. In addition, several operation characteristics are examined through experimental tests, using a 1.5-kW prototype. The maximum efficiency and total input power factor of the experimental setup were 95.4% and 99.9% at 1.5-kW load with 30-Hz output frequency, respectively. Also, the total harmonic distortion of the input current was 5.9% at the rated load condition. These results prove feasibility and effectiveness of the proposed strategy