Modulation strategy to operate the dual active bridge DC-DC converter under soft switching in the whole operating range

Oggier, Germán G.; García, Guillermo; Oliva, Alejandro

doi:10.1109/tpel.2010.2072966

Cited by 446 publications

(188 citation statements)

References 24 publications

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“…It shows that the efficiency improvement using the DPS is not as good as expected. The effect of the DPS in in terms of efficiency improvement is also undervalued in other studies [6], [8], [19], [20]. The possible reasons may include:…”

Section: T1mentioning

confidence: 98%

“…However, the CPS has the drawbacks of high reactive power and circulating current flowing through the transformer, especially when the voltage of NV T1 is different from V T2 , which leads to high conduction losses [1]. The DAB converter may also lose the soft switching capability when the voltage conversion ratio deviates from unity [8]. However, it is difficult to always fulfill a voltage ratio of 1:1 in practical applications considering the wide operating voltage range of energy storage sources such as batteries or ultracapacitors [9].…”

Section: T1mentioning

confidence: 99%

“…These include a phase-shift plus pulse width modulation (PSPWM) control strategy [8], [11]- [12], triangular modulation (TRM) [13], trapezoidal modulation (TZM) [14] and hybrid modulation [15]. In addition, the pulse-skipping control strategy is also proposed for grid-tied converter applications to improve the efficiency for light loads [16].…”

Section: T1mentioning

confidence: 99%

“…With PSPWM, the bridge of the DAB converter with duty-cycle control varies with the voltage conversion ratio and power flow direction, which increases the implementation complexity [7]. Furthermore, the proposed PSPWM with negative values of phase shift shows only half of the attainable maximum output power compared with that of the CPS [8]. The TRM and TZM focus on minimizing the current of the switching devices at the turn-off instant to reduce the switching loss.…”

Section: T1mentioning

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%

See 4 more Smart Citations

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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Section: T1mentioning

confidence: 98%

Section: T1mentioning

confidence: 99%

Section: T1mentioning

confidence: 99%

Section: T1mentioning

confidence: 99%

Section: A Soft-switching Range Of Dpsmentioning

confidence: 99%

See 3 more Smart Citations

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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Robust and low‐cost design ofLLC‐type DCtransformer in hybridAC/DCnano‐grids to improve energy conversion ability

Sun

Tong

Huang

et al. 2021

Int Trans Electr Energ Syst

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In the hybrid AC/DC nano‐grid, the LLC‐type DC transformer (DCT) is widely utilized in the DC and AC bus connection system (BCS) with high frequency to improve the system power density. However, it always employs the simple open‐loop scheme for not increasing the control complexity of the nano‐grid system, which creates a big challenge on the inherent features of the DCT circuit for the energy efficiency and conversion ability. Therefore, a robust and low‐cost design approach of the LLC‐type DCT is put forward in this paper based on the specific requirements of hybrid AC/DC nano‐grid. First of all, the design challenges of the LLC‐type DCT are discussed by analyzing the functions of BCS in nano‐grid application. Then, the detailed parameter design approach is presented step‐by‐step to meet the energy efficiency and conversion requirements in the full power range. Finally, a 6 kW nano‐grid prototype is established to verify the effectiveness of the proposed design method. The results show that the designed DCT can enjoy good energy efficiency and conversion ability with simple control and hence accommodate the high‐frequency nano‐grid application.

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Series inductance design of dual‐active‐bridge converter: ZVS range with practical considerations

Kirsten

Fraytag

Cúnico

et al. 2022

Circuit Theory & Apps

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Summary Zero‐voltage‐switching boundaries of dual‐active‐bridge (DAB) converter operating with phase‐shift modulation is largely studied in literature. However, several practical considerations are neglected to simplify the ZVS analysis. This paper proposes the full analysis of DAB converter ZVS range considering the switches capacitance, dead time, series inductance design, and input/output voltage variation. Three different designs of series inductance were developed. The prototypes were tested under different voltage conditions considering the whole power range. The experimental results show the considerable difference in ZVS region of the classical analysis and the proposed in this paper, proving the feasibility of the paper analysis.

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Modulation strategy to operate the dual active bridge DC-DC converter under soft switching in the whole operating range

Cited by 446 publications

References 24 publications

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

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

Robust and low‐cost design ofLLC‐type DCtransformer in hybridAC/DCnano‐grids to improve energy conversion ability

Series inductance design of dual‐active‐bridge converter: ZVS range with practical considerations

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