Abstract—Traditional
voltage-source inverter is limited by its only voltage step-down operation,
while current-source inverter is limited by its only current step-down mode. In
order to add an extra boosting flexibility while keeping the number of active
semiconductors unchanged, voltage-type and current-type Z-source inverters were
earlier proposed. These new classes of inverters are generally more robust and
less sensitive to electromagnetic noises. However, their boosting capabilities
are somehow compromised by high component stresses and poorer spectral
performances caused by low modulation ratios. Their boosting gains are,
therefore, limited in practice. To overcome these shortcomings, the generalized
switched-inductor and switched-capacitor Z-source inverters are proposed,whose
extra boosting abilities and other advantages have already been verified in
simulation and experiment.
(Index
Terms—Cascaded inverters, multicell inverters, switchedcapacitor (SC),
switched-inductor (SL), Z-source inverters.)
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