Abstract

This work presents a new control scheme based on a finite states Model Predictive Control aimed to fix the switching frequency and to reduce the spectrum dispersion on the output variables of pulse width modulation (PWM) static converters. These topics are particularly important in the operation of power converters where passive filters present resonant modes and in the switching losses reduction. Contrary to standard model predictive control algorithms, the proposed scheme allows for obtaining time-continuous outputs from the optimization process. Thus, the advantages of modulated schemes, like a defined spectrum and fixed switching frequency, are inherited. The tradeoff is a slight reduction on the dynamic response, in comparison with previous schemes using direct non-modulated outputs. Simulated and experimental results show the proper performance of the proposed scheme.