Modulação Space Vector aplicada a inversores monofásicos e trifásicos

Abstract

This work aims to present the Space Vector modulation, geometrically illustrating its behavior. Initially, the Space Vector modulation is applied to a full-bridge single-phase inverter and some important concepts about the modulation are introduced. Afterwards, these concepts will be extended to a three-wired three-phase inverter, where it will be shown that it’s possible to choose two distinct sets of voltages (phase and line voltages) to implement the modulation for this topology. Finally, the Space Vector modulation is applied to a four-leg three-phase inverter. In this case, it will be used two families of algorithms to perform the implementation of this modulation strategy. The first one is implemented using reference frame, while the second one uses abc reference frame. The mathematical description of the modulation is presented in details and a possible implementation is also described for each topology of the inverter in question. To illustrate and verify the operation of the Space Vector modulation to the considered inverter topologies, open-loop simulation results are included.