A 5-kW Isolated High Voltage Conversion Ratio Bidirectional CLTC Resonant DC–DC Converter With Wide Gain Range and High Efficiency

Wang, Chengshan; Zhang, Shuhuai; Chen, Bin; Liu, Jianghua

doi:10.1109/tpel.2018.2823082

Cited by 64 publications

(24 citation statements)

References 37 publications

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“…The SMPS topologies can be grouped according to the method of power transfer from the input to output and are classified in flyback and forward types. The flyback SMPS topologies have a major advantage in providing both step‐up and step‐down voltage gain, which is a very important feature in many applications [4]. This step‐up/down characteristic is shared with Ćuk, SEPIC, and Zeta isolated topologies.…”

Section: Introductionmentioning

confidence: 99%

Piecewise Fryze power theory analysis applied to PWM DC–DC converters

Santos

Hey

Zientarski

et al. 2020

IET Power Electronics

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This study proposes an extension to the well-known Fryze power theory, which allows the development of a mathematical procedure that defines a global factor for the active and non-active power processing in pulse-width modulated (PWM) dc-dc converters. This global factor is the dc power factor. The proposed extension is a vector representation of periodic currents and voltages mapped into a k-dimensional Euclidean space, which permits that all non-active power of all converter elements to be collected into a single figure of merit. To validate the approaches, a 220 W prototype of an isolated dc-dc Ćuk converter architecture was implemented and evaluated. Experimental results have confirmed that both total non-active power, the proposed dc power factor, and system efficiency are correlated. In the worst case of step-down mode, the converter prototype presented the lowest total non-active power of ∼25 var for the turns ratio of 0.567, resulting in the highest dc power factor of 0.135 and prototype efficiency of 80.6%. In step-up mode, it was obtained the lowest total non-active power of ∼1.14 kvar for the turns ratio of 1.764, resulting in the highest efficiency of 88.3% and dc power factor of 0.145.

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Section: Introductionmentioning

confidence: 99%

Piecewise Fryze power theory analysis applied to PWM DC–DC converters

Santos

Hey

Zientarski

et al. 2020

IET Power Electronics

View full text Add to dashboard Cite

show abstract

“…So far, large quantities of works have been implemented on this kind of converters. They are mainly concentrated on the parameter design [7][8][9][10], topology development [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27], control strategies [28], and high-frequency applications [29]. One of the most important issues these literature foci on is how to pursue a wide voltage gain range on the premise of high efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, to deal with this issue, various parameter optimisation methods are proposed. The authors of [18][19][20][21][22][23][24][25][26][27] deduced the LLC topology to some novel derivatives and attained certain improvements. In [19], through the integration of an auxiliary LC resonant circuit, the converter shows the characteristics of a wide input voltage range.…”

Section: Introductionmentioning

confidence: 99%

Soft‐switching DC–DC converter with controllable resonant tank featuring high efficiency and wide voltage gain range

Wang

Liu

Han

et al. 2020

IET Power Electronics

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A two-mode resonant DC-DC converter with auxiliary switch (named as sLLC-C) has been presented. Two simple structural circuits (namely LLC and LLCC) are integrated into one topology with only two magnetic cores, through the topological transformation method. The proposed converter successfully inherits the advantages of the above two circuits, while avoiding their drawbacks as well. At the rating condition, it functions as an LLC circuit, and thus high conversion efficiency is easily obtained. The LLCC working mode is called automatically once the input voltage increases. In such a way, within a limited frequency range, the voltage gain range is effectively extended. A detailed parameter design is given to help achieve desirable performances. Finally, experiments are carried out to validate the feasibility and correctness of the proposed sLLC-C converter. The output voltage is maintained at 400 V, even if the input voltage varies in the range of 150-400 V. Besides, the preferable soft-switching characteristics are ensured for both the power switches and secondary-side diodes. The maximum efficiency of 97.3% is achieved. Thus, wide voltage gain range and high conversion efficiency are acquired simultaneously. These performances make the proposed converter well appropriate for the fuel cell generation applications.

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“…For this reason, many advanced studies that are entirely focused on either presenting a new topology or even better describing and exploring an existing topology in terms of modeling and non-ideal analyses have been appearing from the beginning of power electronics research [8], [9]. Within this frame of reference, it is important to state that the voltage gain and efficiency of the DC-DC converter under analysis are usually the performance relations that concentrate the most of the technological improvement effort and thus motivate the study [10].…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Non-Ideal Steady-State Analysis of a Threefold Operation Mode Interleaved-Based DC–DC Converter

et al. 2020

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Formerly in the literature, a new interleaved-based boost converter was devised for multiple input voltage sources purposes. Nevertheless, when only a single input voltage source is connected to the 2-phase version of this converter, it can be seen as a compact interleaved boost with voltage multiplier (cIBVM). A brief description of cIBVM operation as well as the ideal modeling are already discussed in the literature for one specific range of duty-cycle. In this paper, we provide further analysis by considering the conduction and dynamic losses on the analytical model with a single voltage source. Moreover, we also obtained the analytical model considering the entire duty-cycle range showing that the converter can perform either a quadratic, a double or even a symmetric voltage gain depending solely on the switching strategy adopted. The analytical model was obtained using state-space representation and both its accuracy and the effectiveness of the results were validated from a Simulink-based cross validation and a complete sequence of experimental tests. INDEX TERMS DC-DC converters, high step-up conversion ratio, multiple operation modes.

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A 5-kW Isolated High Voltage Conversion Ratio Bidirectional CLTC Resonant DC–DC Converter With Wide Gain Range and High Efficiency

Cited by 64 publications

References 37 publications

Piecewise Fryze power theory analysis applied to PWM DC–DC converters

Piecewise Fryze power theory analysis applied to PWM DC–DC converters

Soft‐switching DC–DC converter with controllable resonant tank featuring high efficiency and wide voltage gain range

A Comprehensive Non-Ideal Steady-State Analysis of a Threefold Operation Mode Interleaved-Based DC–DC Converter

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