| With the rapid advancement of wide band-gap device researches, the switched-capacitor topologies have attracted more and more attentions, due to its inductor-less feature and high-temperature operation capability. This dissertation presents a series of work on high power switched-capacitor converters, including the study on both the topologies and voltage regulation methods for high-power switched-capacitor converters.;A modular cell-based switched-capacitor topology is first presented, which can be configured to realize both dc-dc and dc-ac power conversions. When used in dc-dc applications, this topology has the advantages of reduced input current ripple and minimized output capacitor size compared to traditional switched-capacitor topologies. When used in dc-ac conversions, a multi-level inverter topology can be realized based on the proposed cell structure. With a variable-frequency control method, the zero-current-switching is achieved over the entire fundamental cycle.;To reduce the power loss, especially the conduction loss on the input capacitors due to the pulsing input current, a voltage tripler that can realize input current and output voltage interleaving is presented. Three identical stages exist in the proposed topology, with a 120 degree phase-shift between each two stages. A two-step charging scheme is utilized to realize the interleaving function. Both the conduction losses and switching losses can be minimized by using this topology.;To efficiently regulate the output voltage of high-power switched-capacitor converters, a voltage regulation method is proposed, in which a RCL equivalent circuit of the capacitor charging loop is adopted. The third-quadrant operation of MOSFETs is utilized to reduce the power loss due to the voltage regulation.;A switched-capacitor dynamic voltage restorer topology is examined as an example of high-power switched-capacitor converter applications. The switched-capacitor based isolation cell, consisting of two capacitors and four switches, is used to isolate the source from the load. The zero-current-switching for the switches related with the capacitor charging is realized, which helps to reduce the EMI noises and switching loss.;Detailed theoretical analysis, simulation and experimental results are included in this dissertation. |
