PWM in three-phase switching converters-sliding mode solution
In this paper, the selection of the switching logic for PWM three phase switching converters (inverters and rectifiers) is presented. The approach is based on the deliberate introduction of the sliding mode motion in the control system. It is shown that the selection of the PWM pattern is a direct result of the sliding mode existence in the closed-loop system. The PWM pattern selection for three phase inverters and three phase rectifiers is the same, due to the fact that their switching matrix is the same. Simulation results show that proposed algorithm has an advantage that the current ripple can be set as a fraction of the reference current while the switching frequency does not increase.<<ETX>>