An isolated high step-up forward/flyback active-clamp converter with output voltage lift

Kuo, Ping‐Huan; Liang, Tsorng–Juu; Tseng, Kuo‐Ching; Chen, J. F.; Chen, S. M.

doi:10.1109/ecce.2010.5617973

Cited by 21 publications

(8 citation statements)

References 24 publications

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“…When the switch is turned on, the first boost stage is similar to a boost converter combined with a switched capacitor converter. Conversely, when the switch is turned off, the second boost stage is similar to the flyback and switched capacitor converters [26][27][28][29][30][31][32][33][34]. The new proposed converter architecture can achieve a high step-up ratio by adjusting the duty cycle; a clamp circuit is used for energy recovery by the leakage inductor of the coupled inductor to achieve high efficiency and step-up ratio.…”

Section: Operation Principle Of the Proposed Convertermentioning

confidence: 99%

A Novel High Step-Up DC-DC Converter with Coupled Inductor and Switched Clamp Capacitor Techniques for Photovoltaic Systems

et al. 2017

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Abstract:In this study, a novel high step-up DC-DC converter was successfully integrated using coupled inductor and switched capacitor techniques. High step-up DC-DC gain was achieved using a coupled inductor when capacitors charged and discharged energy, respectively. In addition, energy was recovered from the leakage inductance of the coupled inductor by using a passive clamp circuit. Therefore, the voltage stress of the main power switch was almost reduced to 1/7 V o (output voltage). Moreover, the coupled inductor alleviated the reverse-recovery problem of the diode. The proposed circuit efficiency can be further improved and high voltage gain can be achieved. The operation principle and steady-state analysis of the proposed converter were discussed. Finally, a hardware prototype circuit with input voltage of 24 V, output voltage of up to 400 V, and maximum power of 150 W was constructed in a laboratory; the maximum efficiency was almost 96.2%.

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Section: Operation Principle Of the Proposed Convertermentioning

confidence: 99%

A Novel High Step-Up DC-DC Converter with Coupled Inductor and Switched Clamp Capacitor Techniques for Photovoltaic Systems

et al. 2017

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“…Several types of DC/DC converters such as tapped inductors, coupled inductors, quadratic, cascaded converters, multi‐port and so on, are suggested. Isolated converters like secondary‐series boost converters [5, 6], voltage‐lift techniques [7, 8] and boost‐type converters integrated with transformer [9, 10], those with coupled inductors, such as flyback or isolation Sepic converters can obtain high conversion ratio. However, the leakage energy lowers the conversion efficiency, induces high‐voltage stress and switching losses and also increases electromagnetic interference (EMI) problems.…”

Section: Introductionmentioning

confidence: 99%

Non‐isolated multi‐input–single‐output DC/DC converter for photovoltaic power generation systems

Banaei

Ardi

Alizadeh

et al. 2014

IET Power Electronics

200

143

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A new multi-input non-isolated DC/DC converter with high-voltage transfer gain is proposed in this study. The presented converter consists of the conventional buck-boost and boost converters. All the stages except the last stage are buck-boost converters. The last stage is the conventional boost converter. The proposed multi-input high-voltage gain converter benefits from various advantages such as reduced semiconductor current stress, no limitation for switching duty cycle and wide control range of different input powers. The presented converter can even operate when one or some power input fail to provide energy to the load. The steady-state operation and dynamic modelling of the suggested converter are analysed thoroughly. Experimental results are also provided to verify the feasibility of the presented converter.

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“…A boost-flyback converter, which utilized a coupled inductor to integrate the conventional boost converter with a flyback converter, has been proposed; this technique features high step-up gain and high efficiency [10,11]. Recently, many proposed high step-up converters have integrated a coupled inductor with a switched capacitor for high step-up gain and high efficiency [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27]. In addition, a few converters have adopted three-winding coupled inductors and a switched-capacitor technique for increasing step-up gain [28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Analysis and implementation of a high step‐up converter for fuel cell power‐generation systems

Tseng

Kang

Tsai

et al. 2016

Circuit Theory & Apps

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This paper presents a high step-up converter, which utilizes a three-winding coupled inductor and a rectified voltage-doubler circuit to obtain high step-up gain for fuel cells. The proposed converter functions as an active-clamp circuit, which relieves large voltage spikes across the power switches. Thus, power switches with low-voltage-rated can be utilized to reduce conduction losses and circuit cost. Energy stored in leakage inductances of the coupled inductor is recycled to the output terminal, resulting in efficiency improvements. In addition, the coupled inductor in the presented converter can also have extra windings in order to achieve higher voltage gain. Finally, a prototype circuit with an input voltage of 60 V and an output voltage of 380 V is developed for a 1000 W-rated fuel cell power-generation system to validate its performance, and experimental waveforms and measured efficiency under different input voltages and output power level are demonstrated.

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An isolated high step-up forward/flyback active-clamp converter with output voltage lift

Cited by 21 publications

References 24 publications

A Novel High Step-Up DC-DC Converter with Coupled Inductor and Switched Clamp Capacitor Techniques for Photovoltaic Systems

A Novel High Step-Up DC-DC Converter with Coupled Inductor and Switched Clamp Capacitor Techniques for Photovoltaic Systems

Non‐isolated multi‐input–single‐output DC/DC converter for photovoltaic power generation systems

Analysis and implementation of a high step‐up converter for fuel cell power‐generation systems

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