Three-Terminal Gain Cells Based on Coupled Inductor and Voltage Multiplers for High Step-Up Conversion

Abstract

A generalized methodology for creating gain cells with three terminals is proposed in this brief. The gain cells are based on inductor coupling and voltage multiplier techniques and are applied to the classical dc-dc Boost converter. When compared with conventional gain cells already described in the literature, the proposed ones are able to provide higher step-up gains with the same number of components. Additionally, they also require lower magnetizing inductances to ensure their operation in continuous-conduction mode, which may reduce the volumes of the coupled inductors. To illustrate the application of the proposed gain cells, an example of high step-up dc-dc converter is created and its operation principle is analyzed. A 200-W prototype concerning to this converter is built and tested, validating the proposal.