Journal ArticleDOI
Cascade Cockcroft–Walton Voltage Multiplier Applied to Transformerless High Step-Up DC–DC Converter
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In this paper, the proposed control strategy employs two independent frequencies, one of which operates at high frequency to minimize the size of the inductor while the other one operates at relatively low frequency according to the desired output voltage ripple.Abstract:
This paper proposes a high step-up dc-dc converter based on the Cockcroft-Walton (CW) voltage multiplier without a step-up transformer. Providing continuous input current with low ripple, high voltage ratio, and low voltage stress on the switches, diodes, and capacitors, the proposed converter is quite suitable for applying to low-input-level dc generation systems. Moreover, based on the n-stage CW voltage multiplier, the proposed converter can provide a suitable dc source for an n + 1-level multilevel inverter. In this paper, the proposed control strategy employs two independent frequencies, one of which operates at high frequency to minimize the size of the inductor while the other one operates at relatively low frequency according to the desired output voltage ripple. A 200-W laboratory prototype is built for test, and both simulation and experimental results demonstrate the validity of the proposed converter.read more
Citations
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Journal ArticleDOI
The Modular Multilevel Converter for High Step-Up Ratio DC–DC Conversion
Xiaotian Zhang,Timothy C. Green +1 more
TL;DR: A modular multilevel dc-dc converter based on the standard boost converter topology but with the normal single switches replaced by a number of capacitor-clamped submodules that exhibits scalability without using a transformer and is capable of bidirectional power flow.
Journal ArticleDOI
An Analytical Method to Evaluate and Design Hybrid Switched-Capacitor and Multilevel Converters
TL;DR: In this paper, a quantitative method that can serve as a guide to compare and design multilevel topologies for large conversion ratio applications is presented, which keeps the conduction loss and switching loss constant across the different converters and employs the passive component volume as the single performance metric.
Journal ArticleDOI
A Novel Switched-Coupled-Inductor DC–DC Step-Up Converter and Its Derivatives
TL;DR: In this article, the authors proposed a dc-dc converter configuration, which successfully integrates two technologies, including a switched capacitor and a switched coupled inductor, into one converter, and achieved a voltage gain of up to 11.2%.
Journal ArticleDOI
Comparative analysis of high voltage gain DC-DC converter topologies for photovoltaic systems
TL;DR: In this article, a comparative analysis has been presented on various topologies of isolated and non-isolated DC-DC converters, based on the conventional basic boost converter, for photovoltaic (PV) systems.
Journal ArticleDOI
Isolated High Step-Up DC–DC Converter With Low Voltage Stress
Fatih Evran,Mehmet Timur Aydemir +1 more
TL;DR: In this paper, a new Z-source-based topology that can boost the input voltage to desired levels with low duty ratios is proposed, where the leakage inductance energy can efficiently be discharged.
References
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Journal ArticleDOI
Power electronics as efficient interface in dispersed power generation systems
TL;DR: In this article, power electronics, the technology of efficiently processing electric power, play an essential part in the integration of the dispersed generation units for good efficiency and high performance of the power systems.
Journal Article
Power Electronics as Efficient Interface in Dispersed Power Generation Systems
TL;DR: In this article, power electronics, the technology of efficiently processing electric power, play an essential part in the integration of the dispersed generation units for good efficiency and high performance of the power systems.
Journal ArticleDOI
Switched-Capacitor/Switched-Inductor Structures for Getting Transformerless Hybrid DC–DC PWM Converters
TL;DR: The superiority of the new, hybrid converters is mainly based on less energy in the magnetic field, leading to saving in the size and cost of the inductors, and less current stresses in the switching elements, lead to smaller conduction losses.
Journal ArticleDOI
Review of Nonisolated High-Step-Up DC/DC Converters in Photovoltaic Grid-Connected Applications
Wuhua Li,Xiangning He +1 more
TL;DR: A general conceptual circuit for high-step-up, low-cost, and high-efficiency dc/dc conversion is proposed to derive the next-generation topologies for the PV grid-connected power system.
Journal ArticleDOI
A Review of the Single Phase Photovoltaic Module Integrated Converter Topologies With Three Different DC Link Configurations
Quan Li,Peter Wolfs +1 more
TL;DR: In this paper, a topology study of the PV MICs in the power range below 500 W and covers most topologies recently proposed for MIC applications is presented, where the MIC topologies are classified into three different arrangements based on the dc link configurations.
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