High Voltage Gain DC-DC Converter Research Articles

Analysis and Implementation of a New Single Switch, High Voltage Gain DC-DC Converter with a Wide CCM Operation Range and Reduced Components Voltage Stress

Analysis and Implementation of a New Single Switch, High Voltage Gain DC-DC Converter with a Wide CCM Operation Range and Reduced Components Voltage Stress

Performance enhancement analysis of an isolated DC-DC converter using fuzzy logic controller

High voltage gain dc-dc converters plays an major role in many modern industrialized applications like PV and fuel cells, electrical vehicles, dc backup systems (UPS, inverter), HID (high intensity discharge) lamps. As usual boost converter experiences a drawback of obtaining a high voltage at maximum duty cycle. Hence in order to increase the voltage gain of boost converter, this paper discusses about the advanced boost converter using solar power application. By using this technique, boost converter attains a high voltage which is ten times greater than the input supply voltage. The output voltage can be further increased to more than ten times the supply voltage by using a parallel capacitor and a coupled inductor. The voltage stress across the switch can be reduced due to high output voltage. The Converter is initially operated in open loop and then it is connected with closed loop. More over the fuzzy logic controller is used for the ripple reduction.

Conversor CC-CC De Alto Ganho Com Divisão De Esforços De Corrente No Estágio De Entrada

Neste artigo é proposto um conversor CC-CC de alto ganho com divisão de esforços de corrente no estágio de entrada. Este conversor foi idealizado com base na topologia Boost-Flyback, a qual tem como principal característica alto ganho de tensão, pelo fato de possuir N saídas em série. Por apresentar alta corrente na entrada do conversor, devido à baixa tensão nesse estágio de potência, é então proposta a divisão de corrente na entrada através da técnica de interleavead, isto é, utilizar N conversores em paralelo. A conexão em paralelo na entrada possibilita a divisão de correntes entre os semicondutores, diminuindo-se as perdas do conversor. Para a análise do conversor é desenvolvida a modelagem estática e dinâmica obtendo a função de transferência do conversor para posterior realização do projeto de controladores. Além disso, são apresentados o projeto, as simulações e os resultados experimentais do conversor operando em malha fechada para uma potência de 1,2 kW.

A family of high-power multilevel switched capacitor-based resonant DC-DC converters – operational parameters and novel concepts of topologies

Abstract This paper presents the concept of topologies and investigation results of switched-capacitor voltage multipliers designed for application in high power systems. The analyzed family of multilevel converters includes established topologies as well as novel concepts. The application of thyristors as well as the invention of novel concepts of multiplier topologies and appropriate control make it possible to achieve high efficiency, high voltage gain, reliable and simple DC-DC converters for high power systems. Based on analytical models of the SCVMs, the paper presents a discussion of the selection of components and the efficiency of the converters as a function of converted power as well as the voltage range on the input and the output side. The results are supported by computer simulations and demonstrative experimental tests.

A modified high step-up non-isolated DC-DC converter for PV application

A non-isolated high voltage gain DC-DC converter has been presented in this paper. The boost, SEPIC and modified SEPIC converters were analyzed and their performance was compared with the proposed converter. The proposed converter has been designed for the input voltage of 15 V and an output voltage of 150 V with 100 W output power. The efficiency of the converter obtained was 92.5%, which is higher than that of the other converter models which were analyzed. Also, the proposed converter utilizes reduced input current and shows low switching voltage stress. The time response analysis conveys that the proposed converter settles to the steady state voltage and current faster than the other compared converters.

High Voltage Gain DC-DC Converter for Renewable Energy Applications

Background/Objectives: In this paper, high voltage gain for a dc-dc converter is achieved by keeping duty cycle fixed. Methods/Statistical analysis: Here converter achieves the high voltage gain by keeping duty cycle fixed and simulation work is carried out in Matlab/Simulink environment. Findings: By using high frequency transformer and by using passive clamp networks such as diodes and capacitors high voltage gain for a dc-dc converter is achieved. Applications: It can be used in any low voltage source application such as PV, fuel cell etc.

Non-Isolated DC-DC Converter for Renewable Based Grid Application

Abstract A high voltage gain dc-dc converter with improved efficiency is proposed in this article for Photovoltaic (PV) based grid application. This converter topology provides high voltage gain with fewer components. The efficient power conversion is achieved with reduced voltage stress across the semiconductor devices. The working principle and analysis of the converter is described in this article. The converter design is made for 250 W power rating and connected to the grid through an inverter. Performance of the proposed converter is simulated and analyzed using MATLAB/Simulink.

Analysis of Active-Network Converter With Coupled Inductors

High step-up voltage gain dc-dc converters are widely applied in fuel cell stacks, photovoltaic arrays, battery sources, and high intensity discharge lamps power systems. Active-network converters with coupled inductors (CL-ANC) are derived from switched inductor active-network converters (SL-ANC). The proposed converter contains two coupled inductors which can be integrated into one magnetic core and two power switches. The converter can provide a relatively high voltage conversion ratio with a small duty cycle; the voltage and current stress of power switches are low which is helpful to reduce the losses. This paper shows the key waveforms of the CL-ANC and detailed derivation of the steady-state operation principle. The voltage conversion ratio and the effect of the leakage inductance on voltage gain are discussed. The voltage stress and current stress on the power devices are illustrated and the comparison between the proposed converter and SL-ANC are given. Finally, the prototype has been established in the lab with 200 V and 400 V output under different turn ratios. Experimental results are given to verify the correctness of the analysis.

A High Gain Input-Parallel Output-Series DC/DC Converter With Dual Coupled Inductors

High voltage gain dc-dc converters are required in many industrial applications such as photovoltaic and fuel cell energy systems, high-intensity discharge lamp (HID), dc back-up energy systems, and electric vehicles. This paper presents a novel input-parallel output-series boost converter with dual coupled inductors and a voltage multiplier module. On the one hand, the primary windings of two coupled inductors are connected in parallel to share the input current and reduce the current ripple at the input. On the other hand, the proposed converter inherits the merits of interleaved series-connected output capacitors for high voltage gain, low output voltage ripple, and low switch voltage stress. Moreover, the secondary sides of two coupled inductors are connected in series to a regenerative capacitor by a diode for extending the voltage gain and balancing the primary-parallel currents. In addition, the active switches are turned on at zero current and the reverse recovery problem of diodes is alleviated by reasonable leakage inductances of the coupled inductors. Besides, the energy of leakage inductances can be recycled. A prototype circuit rated 500-W output power is implemented in the laboratory, and the experimental results shows satisfactory agreement with the theoretical analysis.

English

In this project is widely employed in many industrial applications, such as fuel cell system, uninterrupted power supplies, electric traction, distributed photovoltaic generation system and some medical equipment’s. This project a single switch high voltage gain dc-dc converter with coupled inductor and diode capacitor methods are used. The proposed converter is used to reduce voltage stress with help of coupled inductor and attain the high conversion ratio without operating at high duty cycle. To eliminate potential resonance between diode capacitor and leakage inductance. This converter is reliable and low cost. The nonlinear load produces abnormal conditions, such as voltage imbalance, harmonics current and ripple current. The error can be controlled by using PI controller. With the help of proposed converter, the above problems can be reduced and we can obtain the efficient power factor values. Finally the performance can be designed and verified using MATLAB

Research and Implementation of Single Switch Voltage Clamped Hybrid DC-DC Converter

Recently, micro-inverter has received great attention due to its excellent performance under local shade condition. However, this kind of inverter needs large DC-DC voltage gain to implement grid-connected power generation for single photovoltaic module. This paper presented a new single switch high voltage gain DC-DC converter, which is consist of a double output voltage Boost converter and a flyback converter. The outputs of both converters are connected in series to supply power for the load, so the proposed converter has high voltage gain. Moreover, the input circuit is shared by the boost converter and the flyback converter in this new converter, which facilitates the converter structure and improves the converter efficiency by recycling the transformer leakage energy. The double output voltage boost converter can reduce the turn ratio of the flyback transformer and it can decrease the leakage inductance of transformer and diode voltage stress. In addition, the clamp capacitor can limit the power device voltage stress and simplify the circuit design. The paper analysis the operation process of presented converter and gives the detailed deduction of relevant formula to guide the converter design. Experimental results verify the presented converter.

Modified Sepic ZVRT Converter With Serial Magnetic Coupling and Voltage Multiplier Cell

This paper presents a high voltage gain dc-dc converter operating with soft switching, high switching frequency, and reduced voltage stress in all semiconductors, which is suitable for applications as renewable energy sources. The proposed topology uses the coupled inductor and voltage multiplier cell techniques to obtain high voltage gain. The switch turn-on and turn-off occur with zero voltage switching (ZVS). The soft-switching range is independent of the load and is maintained from nominal output power to light load operation with reduced conduction losses. The theoretical analysis and experimental results of a prototype with 94.55% efficiency at nominal output power (200 W) operating with voltage gain equal to 15 times are presented in this paper.