An Improved Luo Converter for High Power Applications

Abstract

Power conversion is one of the major requirements in various industries and in daily life. Among various types of power conversion, DC-DC conversion has greater importance. DC-DC conversion can be reliably performed using luo converter. It employs voltage lift technique so that output voltage is increased stage by stage, in arithmetic progression. Luo converter can be incorporated with the Z network or impedance network so as to ensure simple start up and smooth power conversion. An impedance network consist of two identical inductors and two identical capacitors connected in 'X' shape. Besides power conversion it also offers filtering operation. The luo converter in this scheme is of switched capacitor type. It helps to provide regulated output voltage from an unregulated source of power supply. The major benefits of this proposed scheme is that it combines the advantages of the switched capacitor, voltage lift technique and the impedance network. Hence the proposed scheme has various advantages such as high power density, larger range of output DC voltage, lower or no inrush current, lower harmonic injection, simple circuit, high voltage transfer gain, can process upto several tens of watts of power. The simulation analysis and the hardware implementation shows that the output voltage obtained is higher than the expected theoretical value. i.e, it is the highly boosted voltage output.