Duty Ratio and Capacitance Analysis of AC/DC Converter without Current Control Circuit

Abstract

This paper analyzes duty ratio and capacitance of AC/DC converter without Power Factor Correction (PFC) circuit. This converter adds a capacitor in order to flow current through a diode of the boost converter every switching cycle. The input current flows every switching cycle without current control and follows input voltage. We calculate circuit equations of the AC/DC converter and simulate using proper duty ratio and capacitance. As simulation results, this circuit convert input voltage and current to constant 12 V and 125 A. We demonstrate the equation and calculated parameters are useful in the AC/DC converter.