A 600-W switched-capacitor AC-AC converter for 220 V/110 v and 110 V/220 v applications

Abstract

This letter proposes an ac-ac converter based on the switched-capacitor principle. The new topology is described, analyzed, designed, and tested in the laboratory. The converter characteristics at the frequency of the input voltage and at the switching frequency are described herein. The absence of magnetic elements and the stress voltages in all components equal to half the input voltage are the main advantages of the proposed ac-ac converter. In order to demonstrate the performance of this converter a design example and experimental results for a prototype of 600W, 220V rm rms high-side voltage, 110V rm rms low-side voltage, and switching frequency of 50kHz are reported herein. The maximum and nominal efficiencies obtained were 95.6 and 90.6, respectively. © 1986-2012 IEEE.