Leg Control Strategy of High Frequency Link Three-Phase Four-Leg Matrix Inverter

In order to solve the problem of the output voltage unbalance, which is caused by unbalanced load or nonlinear load. This paper proposes the high frequency link (HFL) three-phase four-leg matrix inverter which is not only having perfect ability with the unbalanced load or the linear load, but also can realize the input and output electrical isolation. It also can change the range of output voltage. This paper mainly introduces the topology and the working principle of the HFL three-phase fourleg matrix inverter, and introduces de-re-couple strategy based on the topology, at the same time analyzing the process of de-recouple strategy. At last, the experiment results show that the HFL three-phase four-leg matrix inverter can solves the problem of the output voltage unbalance.