This paper proposes a new voltage source inverter
(VSI) referred to as a boost inverter or boost dc–ac converter.
The main attribute of the new inverter topology is the fact
that it generates an ac output voltage larger than the dc input
one, depending on the instantaneous duty cycle. This property
is not found in the classical VSI, which produces an ac output
instantaneous voltage always lower than the dc input one. For
the purpose of optimizing the boost inverter dynamics, while
ensuring correct operation in any working condition, a sliding
mode controller is proposed. The main advantage of the sliding
mode control over the classical control schemes is its robustness
for plant parameter variations, which leads to invariant dynamics
and steady-state response in the ideal case. Operation, analysis,
control strategy, and experimental results are included in this
paper. The new inverter is intended to be used in uninterruptible
power supply (UPS) and ac driver systems design whenever an
ac voltage larger than the dc link voltage is needed, with no need
of a second power conversion stage.