Modeling of Soft-Switching Losses of IGBTs in High-Power High-Efficiency Dual-Active-Bridge DC/DC Converters

Ortiz, Gabriel; Uemura, Hirofumi; Bortis, Dominik; Kolar, Johann W.; Apeldoorn, O.

doi:10.1109/ted.2012.2223215

Cited by 113 publications

(60 citation statements)

References 15 publications

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“…Other topologies such as input-paralleloutput-series (IPOS) converters [16] and switched capacitor converters have been proposed and developed for step-up dcdc conversion [17]- [19]. The IPOS converters use resonant sub-modules to achieve high power conversion and efficiency [20], but the main disadvantage is the requirement of a large number of isolation transformers, which have high potential differences between the windings. Switched capacitor converters are widely used in low voltage applications and resonant operation can also be used to achieve high efficiency.…”

Section: Introductionmentioning

confidence: 99%

The Modular Multilevel Converter for High Step-Up Ratio DC–DC Conversion

Zhang

Green

2015

IEEE Trans. Ind. Electron.

121

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Abstract-High step-up ratio dc-dc converters with megawatt ratings are of interest in wind turbine interfaces and HVDC systems. This paper presents 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 sub-modules. The converter is operated in resonant mode with resonance between sub-module capacitors and the arm inductor. A phase-shifted switching arrangement is applied such that there is a constant number, N of sub-modules supporting the high voltage at a time. In this operation mode, the step-up ratio is dependent on the number of sub-modules and the inductor charging ratio. The converter exhibits scalability without using transformer and is capable of bidirectional power flow. An application example of a wind turbine interface with a 10 : 1 conversion ratio is demonstrated in simulation. The experimental verification of the concept using a lab-scale prototype is provided.

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Section: Introductionmentioning

confidence: 99%

The Modular Multilevel Converter for High Step-Up Ratio DC–DC Conversion

Zhang

Green

2015

IEEE Trans. Ind. Electron.

121

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“…For the maximization of the efficiency of the single cell, many design optimization methods have been discussed in literature, which consider the semiconductors technology, the modulation or reactive elements as the main input parameters [22]. In a system level view, on the other hand, one more aspect can be used to optimize the overall efficiency of the system: the operation point of the individual cell with respect to the system behavior.…”

Section: Cells Loading In a Modular System: Impact On Efficiencymentioning

confidence: 99%

Power Routing in Modular Smart Transformers: Active Thermal Control Through Uneven Loading of Cells

Liserre

Andresen

Costa

et al. 2016

EEE Ind. Electron. Mag.

105

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“…DPS manipulates two phase shifts, where D 1 symbolizes the phase shift between the diagonal control signals in the same bridge, for instance, between the gate signals of Q 11 and Q 14 , and D 2 is the phase shift between the primary and the corresponding secondary gate signals, for instance, between the gate signals of Q 11 and Q 21 . All of the switching devices using DPS are operated at a 50% duty-cycle, which is consistent with the CPS.…”

Section: Power Flow Analysis With Dpsmentioning

confidence: 99%

“…In order to realize ZVS soft-switching operation, the inductor current zero crossing instant should be arranged within the time interval with the voltages v T1 and v T2 having the opposite polarities [8], [10], [21], [22]. Thus, the inductor current i L at different switching angles must fulfill the following inequalities, which are shown in TABLE IV.…”

Section: A Soft-switching Range Of Dpsmentioning

confidence: 99%

Reactive Power and Soft-Switching Capability Analysis of Dual-Active-Bridge DC-DC Converters with Dual-Phase-Shift Control

Wen¹,

Su²

2015

Journal of Power Electronics

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This paper focuses on a systematical and in-depth analysis of the reactive power and soft-switching regions of Dual Active Bridge (DAB) converters with dual-phase-shift (DPS) control to achieve high efficiency in a wide operating range. The key features of the DPS operating modes are characterized and verified by analytical calculation and experimental tests. The mathematical expressions of the reactive power are derived and the reductions of the reactive power are illustrated with respect to a wide range of output power and voltage conversion ratios. The ZVS soft-switching boundary of the DPS is presented and one more leg with ZVS capability is achieved compared with the CPS control. With the selection of the optimal operating mode, the optimal phase-shift pair is determined by performance indices, which include the minimum peak or rms inductor current. All of the theoretical analysis and optimizations are verified by experimental tests. The experimental results with the DPS demonstrate the efficiency improvement for different load conditions and voltage conversion ratios.

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Modeling of Soft-Switching Losses of IGBTs in High-Power High-Efficiency Dual-Active-Bridge DC/DC Converters

Cited by 113 publications

References 15 publications

The Modular Multilevel Converter for High Step-Up Ratio DC–DC Conversion

The Modular Multilevel Converter for High Step-Up Ratio DC–DC Conversion

Power Routing in Modular Smart Transformers: Active Thermal Control Through Uneven Loading of Cells

Reactive Power and Soft-Switching Capability Analysis of Dual-Active-Bridge DC-DC Converters with Dual-Phase-Shift Control

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