Hirotaka Koizumi

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—A novel switched-capacitor inverter is proposed. The proposed inverter outputs larger voltage than the input voltage by switching the capacitors in series and in parallel. The maximum output voltage is determined by the number of the capacitors. The proposed inverter, which does not need any inductors, can be smaller than a conventional two-stage unit(More)
Previous analytical descriptions of the Class D-E resonant dc/dc converter using thinned-out method have been based on the assumptions simplifying the eect of thinned-out control on the equivalent impedance. Therefore the dierence between the calculated values and the measured values is signicant in large thinned-out ratio. This paper presents a new(More)
—A design of phase-controlled class E inverter with asymmetric circuit configuration is presented. By using the presented design method, it is possible to derive the design values, which let the inverters achieve zero-voltage switching continuously in the control range, are derived. By carrying out circuit experiments, it is verified that the experimental(More)