A Novel Space Vector Modulation for the 3x5 Direct Matrix Converter

The multiphase AC motor driver system with matrix converter has many advantages, while the control is very complex. Instead of carrier modulation, the space vector modulation is more used for field oriented control in the motor drive system. Traditional space vector modulation of the matrix converter is an evolution of the two-level inverter, whose vectors are represented by the input phase abc. In this paper, we present a new space vector modulation strategy for multiphase matrix converter with a 3x5 system as an example, based on the perspective of a three-level. This method utilizes the three-level modulation for reference from the mature method in fictitious inverter, and applies it to the multi-phase matrix converter system through analysis and improvement. For the voltage level of three-level modulation is relatively clear, the new method is prone to get an optimal result for different goals. On the basis of theoretical analysis and derivation, a novel sectioned modulation method is proposed in the paper. The simulation verify the correctness of the method.