Family of quadratic step‐up dc–dc converters based on non‐cascading structures

Loera-Palomo, Rodrigo; Morales-Saldaña, J.A.

doi:10.1049/iet-pel.2013.0879

Cited by 62 publications

(30 citation statements)

References 28 publications

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“…In spite of topological improvements, connecting two or more power converters in to multi-cell configurations is an alternative way to achieve a high conversion ratio. This can be obtained by series/parallel connection of power converter units [4], [9], cascaded cells [18]- [20] or multilevel approach [21]. With no doubt, multi-cell connection of power converters is an effective way to match the required power rating, voltage gain and reduce voltage stresses across the power switches, but high component count and lower efficiency may limit their performance.…”

Section: Introductionmentioning

confidence: 99%

High-Voltage Gain Quasi-SEPIC DC–DC Converter

Siwakoti

Mostaan

Abdelhakim

et al. 2019

IEEE J. Emerg. Sel. Topics Power Electron.

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This paper proposes a modified coupled-inductor SEPIC dc-dc converter for high voltage gain (< < 10) applications. It utilizes the same components as the conventional SEPIC converter with an additional diode. The voltage stress on the switch is minimal, which helps the designer to select a low voltage and low RDS-on MOSFET, resulting in a reduction of cost, conduction and turn ON losses of the switch. Compared to equivalent topologies with similar voltage gain expression, the proposed topology uses lower component-count to achieve the same or even higher voltage gain. This helps to design a very compact and lightweight converter with higher power density and reliability. Operating performance, steady-state analysis and mathematical derivations of the proposed dc-dc converter have been demonstrated in the paper. Moreover, extension of the circuit for higher gain (> 10) application is also introduced and discussed. Finally, the main features of the proposed converter have been verified through simulation and experimental results of a 400 W laboratory prototype. The efficiency is almost flat over a wide range of load with the highest measured efficiency of 96.2%, and the full-load efficiency is 95.2% at a voltage gain of 10.

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Section: Introductionmentioning

confidence: 99%

High-Voltage Gain Quasi-SEPIC DC–DC Converter

Siwakoti

Mostaan

Abdelhakim

et al. 2019

IEEE J. Emerg. Sel. Topics Power Electron.

View full text Add to dashboard Cite

show abstract

“…However, the losses of converters would add up, resulting in reduced efficiency of the system. So-called quadratic converters [17][18][19][20] can achieve the voltage gain of the cascaded converters with fewer switches, but voltage or current overstresses could be present. Finally, hybrid converters are becoming an interesting solution [21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Switched-Capacitor Boost Converter for Low Power Energy Harvesting Applications

et al. 2018

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The paper presents a Switched-Capacitor Boost DC-DC Converter (SC-BC) which can be used in energy harvesting applications using thermoelectric generators (TEGs) with low output voltage, low power and a significant internal resistance. It consists of a switching capacitor circuit, where MOSFETs are used as switches, and a boost stage. The converter is a modification of a previously presented scheme in which diodes are used in the switched capacitor stage. A higher voltage gain and an increased efficiency can thus be achieved. The model of the converter was developed considering the internal resistance of the TEG and boost stage inductor. A comparison with the diode based converter is shown, with consideration of the TEG internal resistance. Calculation is presented of the main passive components. A control algorithm is also proposed and evaluated. It is based on a linearization approach, and designed for output voltage and inductor current control. The operation of both converter and control are verified with the simulation and experimental results.

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“…The attractive feature of this method is to avoid the power reprocessing and to improve the efficiency of the converter [7,8]. A family of the quadratic step-up DC-DC converters is derived based on RRPP by avoiding the cascade connection in [9]. However, it is observed that in this case, the conversion ratio is quite low.…”

Section: Introductionmentioning

confidence: 99%

Reliability study of high gain DC-DC converters based on RRPP I-IIA configuration for shipboard power system

2018

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This paper examines the family of high gain DC-DC converter derived from I-IIA configuration, primarily based on Reduced Redundant Power Processing (RRPP). The primary intention of this study is to determine the best topology for high voltage applications. The steady-state analysis of the proposed topologies is investigated and verified. The denominators of the voltage conversion ratio are observed to be similar for all the derived topologies, and they are in quadratic form. A comprehensive assessment is done based on voltage gain, voltage stress across storage element, switch stress voltage, switch utilization factor and inductor value. The best topology is identified and analyzed thoroughly in Continuous Conduction Mode (CCM) and Discontinuous Conduction Mode (DCM). Also, its performance evaluation and reliability study are also carried out. The advantage of that topology is validated using theoretical and simulation results. Finally, 40 W prototype is developed to verify the results.

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Family of quadratic step‐up dc–dc converters based on non‐cascading structures

Cited by 62 publications

References 28 publications

High-Voltage Gain Quasi-SEPIC DC–DC Converter

High-Voltage Gain Quasi-SEPIC DC–DC Converter

Switched-Capacitor Boost Converter for Low Power Energy Harvesting Applications

Reliability study of high gain DC-DC converters based on RRPP I-IIA configuration for shipboard power system

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