Single-Switch High Step-Up Zeta Converter Based on Coat Circuit

Zhu, Binxin; Guang-hui, Liu; Zhang, Yao; Yu, Han; Hu, Shishi

doi:10.1109/access.2020.3048388

Cited by 27 publications

(8 citation statements)

References 31 publications

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“…The shortcomings of these traditional single switch topologies include low power conversion efficiency and increased stress across the switching components. The single switch non-isolated converter topologies are modified by adding extra diodes and passive elements in order to improve the voltage gain [13][14][15][16][17][18][19]. The researchers have also developed non-isolated topologies with extra power switches, diodes and passive components for enhanced static voltage gain [20,21].…”

Section: Introductionmentioning

confidence: 99%

A Transformerless Boost-Modified Cuk Combined Single-Switch DC-DC Converter Topology with Enhanced Voltage Gain

Duraisamy¹

2023

Braz. arch. biol. technol.

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Recently, the research is towards the development of high static gain DC-DC converters suitable for renewable energy applications. The high voltage gain can be achieved using isolated and non-isolated configurations of the converter. The magnetically coupled inductor based isolated DC-DC converter structures can have improved voltage gain, but they need large size inductors which may lead to increased cost. Thus, the modified structures of non-isolated conventional boost, CUK, and SEPIC topologies with inclusion of additional controlled and uncontrolled switches along with large number of passive components are employed to achieve the improved voltage gain. However, it leads to increased complexity and control. Hence, the researchers concentrated on development of hybrid non-isolated DC-DC converter topologies capable of achieving enhanced static voltage gain, without adding extra controlled switches and passive elements. In this paper, a hybrid non-isolated single-switch DC-DC converter structure is proposed for achieving high voltage gain than that of traditional non-isolated topologies. The proposed hybrid structure operating in continuous inductor current mode is obtained by connecting the conventional boost and the modified CUK converters in parallel. The power switch and the diodes have low voltage-current stress. The operation of the proposed hybrid topology during various modes is explored. The mathematical modeling of the proposed converter is also provided. The MATLAB / SIMULINK study of the suggested hybrid converter has been implemented. The digital simulation study proves the feasibility of the proposed hybrid converter concept and its steady-state behavior.

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Section: Introductionmentioning

confidence: 99%

A Transformerless Boost-Modified Cuk Combined Single-Switch DC-DC Converter Topology with Enhanced Voltage Gain

Duraisamy¹

2023

Braz. arch. biol. technol.

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“…A DC-DC converter with high voltage gain is obtained in [6] in which during ON state of the MOSFET, the inductor is charged and the capacitors are connected in series to supply the load, and during the OFF state of the MOSFET, the inductor transfers energy to charge multiple capacitors in parallel. In [7], a coat circuit consisting of two capacitors, an inductor and a diode, is introduced to the basic Zeta converter to increase voltage gain and to reduce the voltage across the switch. An improved voltage lift technique by employing an extra diode and capacitor and a SL cell has been introduced in [8], which increases the voltage gain significantly and reduces the voltage stresses across the semiconductor devices.…”

Section: Introductionmentioning

confidence: 99%

A dual switches high step‐up DC–DC converter with low voltage stresses across switches

Radmehr

Nouri

Shaneh

2022

IET Renewable Power Gen

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A dual switches high step-up DC-DC converter with coupled inductor (CI) and voltage multiplier cell (VMC) is proposed in this paper. The gate pulses of the switches are synchronized with each other. During ON state of the switches, the CIs are charged in parallel through the input power source and during OFF state of the switches, they are discharged to the output in series. The energy of the leakage inductances is recycled by the passive clamp circuit. The passive clamp circuit for one of the metaloxidesemiconductor fieldeffect transistor (MOSFETs) is integrated with the VMC. In such a case, the clamp circuit participates in voltage gain extension which facilitates the utilization of lower number of the components, as well. Meanwhile, the MOSFETs and diodes are turned ON and turned OFF with zero current switching (ZCS) performance which reduces the switching losses. Through the dual switches concept and implementation of the CI VMC, the advantages such as high voltage gain, low voltage stresses across switches and distributed current stresses between MOSFETs are achieved. The steady-state analysis of the proposed converter is provided which is followed by a comparison with some published converters. Finally, a 300 W 25V to 400 V laboratory prototype is fabricated and tested to verify the performances.

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“…In the other multiport converter, which combined a Zeta and a Landsman converter [25], the efficiency was higher, but the circuit had varied control circuits. The Zeta converters integrated in [26,27] as multiport were isolated using transformers to obtain a high voltage gain for the distributed power generation. In making the best use of the features of the Zeta converter, a suitable dc converter should be combined with it, in order to configure a multiport structure.…”

Section: Introductionmentioning

confidence: 99%

Implementation of Non-Isolated Zeta-KY Triple Port Converter for Renewable Energy Applications

et al. 2021

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This paper proposes a three-port Zeta-KY dc-dc converter which is fed with hybrid sources like photovoltaic (PV) cells and batteries. The converter proposed here is a multi-input single-output (MISO) structure which harnesses the benefits of Zeta and KY converters. The combination of these converters is highly advantageous since the Zeta converter provides lesser output voltage ripples with high gain and the KY converter topology suits well for withstanding load transients. The KY converter used in this research work is subjected to a topological change to facilitate bidirectional power flow. The bidirectional flow is essential to save the excess power in PV source in batteries during low load conditions. This novel multiport topology with bidirectional facility is first of its kind and has not been discussed earlier in the research arena. In the proposed work, two control algorithms are developed and deployed: the first one ensures the maximum power extraction from the PV and the second one maintains constant dc bus voltage and manages bidirectional power flow. MATLAB Simulink and hardware prototype of the proposed system has been realized for a 72 V dc bus and a 500 W electric vehicular drive. The simulation and experimental results reveal that the proposed system is viable for medium power electric shuttle applications. The proposed system is subjected to various test cases and it is observed that the source and load intermittencies are catered very well by the proposed three port Zeta-KY converter. The developed multiport converter is feasible for renewable energy applications.

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Single-Switch High Step-Up Zeta Converter Based on Coat Circuit

Cited by 27 publications

References 31 publications

A Transformerless Boost-Modified Cuk Combined Single-Switch DC-DC Converter Topology with Enhanced Voltage Gain

A Transformerless Boost-Modified Cuk Combined Single-Switch DC-DC Converter Topology with Enhanced Voltage Gain

A dual switches high step‐up DC–DC converter with low voltage stresses across switches

Implementation of Non-Isolated Zeta-KY Triple Port Converter for Renewable Energy Applications

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