Abstract
Due to resistance of power switches, rectifier diodes, equivalent series resistance (ESR) of capacitors and inductors, providing high step-up gains is difficult in Conventional boost converters. In this paper, a transformer-less high gain dc-dc converter is proposed to obtain high step-up voltage gain with nominal or reduced duty ratios. The proposed converter has two inductors of same value which are charged in parallel in one period and when all switches are OFF they will discharge in series with the source to the load. The voltage gain equation of the proposed converter in continuous conduction mode (CCM) is extracted. Then, the critical capacitance, critical inductance, and voltage stresses are calculated. Different topologies are discussed and compared with the proposed converter. The average modelling and the small signal analysis of the converter is discussed in detail. A type-III controller/compensator is designed for making the system stable and for making output voltage constant for an input range of 10-30V. The closed loop simulation of the converter is done by using MATLAB and obtained results are shown.
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