Abstract
The Cockcroft-Walton (CW) circuit, which is well known as a high step-up rectifier, is used in a lot of systems. It is considered that the boost ratio of the circuit decreases according to the load current and the diode junction capacitor. In addition, it is necessary for these rectifiers to use some power factor correctors. This paper investigates the circuit which adds an input inductor. The proposed circuit is focused on LC resonance between the input inductor and the diode junction capacitors. It is numerically and experimentally clarified that the LC resonance improves the boost ratio and the power factor.
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