A new transformerless semi‐quadratic buck–boost converter based on combination of Cuk and traditional buck–boost converters

Abstract

In this paper, a new transformerless buck–boost converter is proposed. This converter is based on combining two basic converters, including Cuk and traditional buck–boost converters, along with a voltage multiplier (VM) at the output side. The proposed semi‐quadratic buck–boost converter operates in continuous conduction mode (CCM) and provides two operation modes by turning the switches on and off. This converter has some merits such as a wide conversion ratio and continuous input current. The proposed converter consists of two switches with simultaneous operation resulting in simplicity in control. A modular configuration and a wide range of duty cycles are available through the proposed converter, which causes higher or lower output voltage and facilitates the converter maintenance. The calculations of the ideal and the real voltage gain, voltage stress of switches and diodes, efficiency, and design consideration of elements are given in this paper. Finally, a prototype is implemented, and experimental waveforms are obtained to prove and validate the simulation results as well as the theoretical analysis of the proposed converter.

Implementation of a novel buck-boost converter based on coupled inductor for renewable energy applications

“…In step-up mode, the proposed converter has higher voltage gain than converter in Banaei and Ajdar Faeghi Bonab 14 , Sarikhani, et al 24 , and Wang, et al 27 . In step-down mode, converters in Banaei and Ajdar Faeghi Bonab 14 , Dhimish and Schofield 15 , Kumar and Krishnasamy 17 , and Hosseinpour, et al 30 of voltage gain are less than proposed converter. Although the voltage gain in Alizadeh, et al 21 is equal to the proposed converter, the current stress of power switch in this converter is considerably larger than the proposed converter.…”

“…A novel negative output buck-boost converter in Ding and Wang 28 and a converter with interleaving two CUK converters in Taghizadegan Kalantari, et al 29 are proposed, which achieve wider conversion ratio than above dual switches converter and have non-common ground structure. Converter in Hosseinpour, et al 30 proposes a dual switches converter with common ground structure. The circuit achieves high voltage gain while minimizing the voltage stress of the switch through increment passive components' number, which make the converter bulky.…”

Research on maximum power point tracking of PV systems based on perturbation and observation method

“…According to Eq.1, the duty cycle of VT is defined as the conduction time (ton) of VT divided by the entire amount of time [8][9].…”

Implementation of a novel buck‐boost converter based on coupled inductor for renewable energy applications

“…To solve the effect of noncommon and hold on the voltage gain with previous converter, a modified SEPIC converter is proposed in Wang et al 27 A novel negative output buck‐boost converter in Ding and Wang 28 and a converter with interleaving two CUK converters in Taghizadegan Kalantari et al 29 are proposed, which achieve a wider conversion ratio than the above dual switches converter and have a noncommon ground structure. The converter in Hosseinpour et al 30 proposes a dual switches converter with a common ground structure. The circuit has a high conversion ratio while minimizing the voltage stress of the switch through incrementing passive components' number, which makes the converter bulky.…”