A High Step-Up Transformerless DC-DC Converter with New Voltage Multiplier Cell Topology and Coupled Inductor

In this paper, a new high step-up transformerless DC-DC converter based on voltage multiplier and coupled inductor topology is presented. The proposed converter has two stages. In the first stage, a modified boost converter is designed by the coupled inductor and in the second stage, a new voltage multiplier by using a coupled inductor was illustrated. In this converter, high voltage gain can be achieved by adjusting the turn ratio of two coupled inductors and duty cycle which result in three degrees of design freedom. Using a single power switch with low on-resistance in the converter structure leads to simple control and low conduction loss. Also, total voltage stresses of active elements are decreased which cause to increase efficiency. Steady-state performance and theoretical achievements are confirmed by experimental test results on a test setup with one 200 W DC-DC prototype.©2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.fi=vertaisarvioitu|en=peerReviewed