On a novel current control method for matrix converter

摘要

As one type of general power converter, matrix converter can realize n phase to m phase voltage conversion, the control strategy of which is now a research hotspot. For three input and one output phase matrix converter (31MC), in view of the insufficiency of normal strategies, a control strategy is adopted based on the hysteresis current control technology. Moreover, aimed at the contradiction between the constant switching frequency of present current control mode and the control speediness, a novel hysteresis current control method is introduced with frequency feedback included. On the condition of relax the rigid requirement to the switching frequency, the current control speed is highly improved without its reliability drop. The proposed technology of MC is proved by theory analysis and computer simulation in the paper.