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Diode-assisted buck-boost voltage source inverter (VSI) boosts the dc source voltage by introducing a diode-capacitor network. With capacitive charging in parallel and discharging in series, it extends voltage regulation range and avoids extreme boost duty ratio. As for the unique structure, various pulse width modulation (PWM) strategies are provided with regarding to the chopped intermediate dc-link...
Z-source inverter introduces a unique X-shaped impedance network and boosts the input voltage by utilizing shoot-through (ST) states. It provides a competitive single-stage approach for DC to AC power conversion in relatively low voltage boost ratio range (1–2). This paper proposes a novel control strategy for Z-source inverter. With this strategy, only one phase leg operates at high switching frequency...
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