Improved Three-vector Control Based On Minimum Current Ripple

In order to obtain better system performance, an improved three-vector model predictive current control (MPCC) based on minimum current ripple is proposed. In this method, two different combinations of voltage vectors are used according to different working conditions. One is the combination of two non-zero voltage vectors and a zero vector, the other is the combination of three non-zero voltage vectors. By calculating the current ripple of two different combinations, the combination that has smaller current ripple is selected to act on the next control period. Finally, comparative experiments show that the proposed method has better steady-state performance than the traditional three-vector MPCC in the medium and high speed.