Abstract
ABSTRACTThis study suggested a simple structure of coupled-inductor switched-capacitor inverter (CISCI) to attain the goal of high-gain boost DC-AC conversion & closed-loop regulation. Its power part consists of a coupled-inductor switched-capacitor booster (one coupled-inductor device with turn ratio n, two pumping capacitors, one switch) and a two-bridge-capacitor-based DC-link inverter, so as to obtain the range of a DC-AC gain as: ( is a ratio cycle of charging coupled inductor). The CISCI control part consists of a phase generator and a sinusoidal pulse-width-modulation compensator (mainly implemented by full-custom fabrication on a chip: D35-104B-E0013, TSMC 0.35 μm 2P4M, 750 × 700 μm2, 3.3 V, 3.889 mW, max frequency: 100kHz), in order not only to perform the timing operation of topologies, but also to reinforce output regulation (to various desired output) and robustness (to loading variation). Furthermore, the related discussions include: modelling, steady-state analysis, boosting gain, power efficiency, selection of inductance and capacitance, stability and control design. Finally, these results from simulation agree with the validity of analysis and design, and the results from experiment go through the verification of the CISCI prototype to prove the efficacy of the presented inverter.
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