A snubber for a buck-boost converter is presented. The proposed snubber uses a resistor, inductor and capacitor. This circuit is capable of resetting the transformer, as well as eliminating leakage inductance voltage spike across the power switch. The proposed snubber eliminates the losses due to switching by freewheeling action through the diode.

As generally acknowledged, the high-gain DC-DC converter is widely used in the sustainable energy system as the front-stage of the DC-AC converter. Therefore, it is indispensable for low voltage to be boosted to high voltage. In general, the boost converter or the buck-boost converter is widely used in such applications. However, it is not easy for such converters to achieve high voltage ratio....

This paper describes the electromagnetic compatibility (EMC) analysis of an inverting buck/boost converter. The converter differs from other DC/DC converters, such as noninverting boost or buck in that one inductor terminal is connected to ground and not input output converter, i.e., neither nor isolated EMC perspective. A SPICE model was developed for analyzing properties circuit. Two interfer...

This paper presents a high step-down tranformerless single-stage single-switch ac/dc converter suitable for universal line applications (90–270 Vr m s ). The topology integrates a buck-type power-factor correction (PFC) cell with a buck–boost dc/dc cell and part of the input power is coupled to the output directly after the first power processing. With this direct power transfer feature and sha...

The flyback-flyback single stage converter operated in DCM+DCM is easy to control bus voltage, but it hard to control stress of switch. We propose a new converter having low voltage stress on its switch. The flyback converter is simplified into buck-boost form. Then the PFC flyback transformer is replaced by an inductor The switch of both PFC and DC/DC stages are merged, and a diode is used to ...

In this paper, analysis, design and implementation of non-isolated soft-switching bidirectional DCDC converter with an active switch are described. The proposed topology gives the output voltage as twice as the input voltage and enhances the efficiency up to 94.5% and 92.9% for boost and buck mode operation by proper selection of the duty cycle. Soft switching can be achieved at both steps up a...

This Paper focused on Buck/Boost Rectification by Single Phase Matrix Converter with fewer numbers of switches. The conventional matrix converter consists of 4 bidirectional switches, i.e. 8 set of IGBT/MOSFET with anti parallel diodes. In this proposed matrix converter, only six switches are used. The switch commutation arrangements are also carried out in this work. The gate pulses to the swi...

This paper proposes a high voltage gain dc/dc converter with coupled inductor cells and switched capacitor for renewable energy applications. It includes coupled inductor, switched capacitor and voltage multiplier cell. Switched capacitor charged during off period by using the energy stored in the coupled inductor. This will increase the performance of the converter. The voltage gain of traditi...

838 Copyright c The Korean Institute of Electrical Engineers This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/ licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. A Single-phase Buck-boost AC-...