Novel Isolated Multilevel DC–DC Power Converter

Jou, Hurng‐Liahng; Huang, Junjie; Wu, Jinn‐Chang; Wu, Kuen-Der

doi:10.1109/tpel.2015.2487558

Cited by 48 publications

(24 citation statements)

References 13 publications

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“…Although the Cuk/Sepic/Zeta converters can achieve a wide voltage gain range without operating under extreme duty cycle conditions, the power conversion efficiency is limited by their cascaded structures [7], [8]. Multi-level dc-dc converters greatly reduce the voltage stresses across power switches by employing more power switches, however, additional hardware as well as more complex control strategies are required [9]- [11]. Coupled-inductor dc-dc converters can achieve a high voltage gain by adjusting the turns ratio of the coupled inductors, but the order of the converter will be higher, which demands a more complicated control system [12].…”

Section: Introductionmentioning

confidence: 99%

A Switched-Capacitor Interleaved Bidirectional Converter With Wide Voltage-Gain Range for Super Capacitors in EVs

Zhang

Gao

et al. 2020

IEEE Trans. Power Electron.

103

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A switched-capacitor interleaved bidirectional (SCIB) dc-dc converter that combines a three-phase interleaved structure with switched-capacitor cells is proposed. The converter features a wide-voltage-gain range, low current ripple on the low voltage side, low voltage stresses across power switches, an absolute common ground between input and output, and can be easily extended into a topology family. The operating principle and power switch voltage and current stresses are analyzed in detail. An 800W prototype with a wide voltage gain range (Uhigh=400V, Ulow=30-100V) is described, demonstrating a maximum efficiency of 95.8% in the step-up mode and 95.9% in the step-down mode. Index Terms-Bidirectional dc-dc converter, electric vehicles, super capacitor, three-phase interleaved, wide voltage gain range.

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Section: Introductionmentioning

confidence: 99%

A Switched-Capacitor Interleaved Bidirectional Converter With Wide Voltage-Gain Range for Super Capacitors in EVs

Zhang

Gao

et al. 2020

IEEE Trans. Power Electron.

103

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“…Incorporating a high-frequency transformer in the DC/DC converter has the advantages of smaller volume and lower cost. Such a multi-level DC/DC power converter was presented in [14], where the two-winding transformer was substituted by a three-winding version in order to produce two DC output voltages. By using a novel switching strategy, a lower variation of the voltage at the output LC filter was achieved, hence the capacitance of the output LC filter could also be reduced.…”

Section: Introductionmentioning

confidence: 99%

New Four-Channel Resonant Boost DC/DC Converter

Hamar

Stumpf

2021

IEEE Access

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Multichannel resonant DC/DC converters have recently been popular in diverse fields, where multiple output voltage levels are required, such as supplying multilevel inverters. This paper is devoted to present the new member of a four-channel resonant DC/DC converter family, having consisted till now of step down as well as step-up/down configurations. The new converter is capable of realizing the power flow amongst the two input and the four output channels in order to maintain the required equal or unequal output voltages. In the meanwhile, it offers the benefits of soft-switching capability, including zero voltage (ZVS) and zero current switching (ZCS), resulting in high efficiency and reduced electromagnetic interference (EMI). The presentation of the new boost converter topology is followed by a detailed steady-state analysis. The focus is on the symmetrical operation of the converter in discontinuous current conduction mode (DCM). Possible sets of control variables are revealed and their effect on the operation, especially on the output voltages and powers is analyzed in detail. A step-by-step calculation procedure is also proposed to determine the circuit parameters. The outcomes of simulations and experiments validate the theoretical results.

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“…The results of the converter in [16] shows excellent performance and stable operation of the converter. The authors in [13], [17] have proposed an isolated multilevel converter arrangement with many controlled switching elements, diodes, capacitors, LC filter and multi-winding transformer. Although the results in [13], [17] are satisfactory, the economic of its operation with many components at input or output power stages is questionable.…”

Section: Introductionmentioning

confidence: 99%

Design and implementation of multilevel non-isolated DC-DC converter for variable DC voltage source

Adam

Elnady

2021

IJPEDS

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<span lang="EN-US">In this paper, a non-isolated multi-level DC-DC (MLDC-DC) smooth buck converter with the LC filter is designed and analyzed. The presented topology can be used in low or medium voltage levels in several applications that use DC storage elements. The use of the proposed multilevel converter topology reduces the voltage stress across the power converter switching elements and facilitates the voltage rating of the switches. The designed LC filter for the multilevel converter is characterized by a small inductor size, which reduces the traditional bulky inductor used in the output of the traditional DC-DC converter. The reduction in the filter size is proportional to the number of the connected voltage sources, it works effectively to reduce ripple in the load currents, and it increases the voltage gain. The intensive analysis of the converter system and the experimental results show a stable operation of the proposed converter with precise output voltage.</span>

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Novel Isolated Multilevel DC–DC Power Converter

Cited by 48 publications

References 13 publications

A Switched-Capacitor Interleaved Bidirectional Converter With Wide Voltage-Gain Range for Super Capacitors in EVs

A Switched-Capacitor Interleaved Bidirectional Converter With Wide Voltage-Gain Range for Super Capacitors in EVs

New Four-Channel Resonant Boost DC/DC Converter

Design and implementation of multilevel non-isolated DC-DC converter for variable DC voltage source

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