A boost DC-AC converter: analysis, design, and experimentation

摘要

This paper proposes a new voltage source inverter (VSI) referrednto as a boost inverter or boost DC-AC converter. The main attribute ofnthe new inverter topology is the fact that it generates an AC outputnvoltage larger than the DC input one, depending on the instantaneousnduty cycle. This property is not found in the classical VSI, whichnproduces an AC output instantaneous voltage always lower than the DCninput one. For the purpose of optimizing the boost inverter dynamics,nwhile ensuring correct operation in any working condition, a slidingnmode controller is proposed. The main advantage of the sliding modencontrol over the classical control schemes is its robustness for plantnparameter variations, which leads to invariant dynamics and steady-statenresponse in the ideal case. Operation, analysis, control strategy, andnexperimental results are included in this paper. The new inverter isnintended to be used in uninterruptible power supply (UPS) and AC drivernsystems design whenever an AC voltage larger than the DC link voltage isnneeded, with no need of a second power conversion stage