Optimal Asymmetric Duty Modulation to Minimize Inductor Peak-to-Peak Current for Dual Active Bridge DC–DC Converter

Mou, Di; Luo, Quanming; Wang, Zhiqing; Li, Jia; Wei, Yuqi; Shi, Haochen; Du, Xiaoze

doi:10.1109/tpel.2020.3025120

Cited by 52 publications

(14 citation statements)

References 20 publications

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“…The modeling and analysis of 3p-DAB converters are the optimization foundation [5]. Time domain analysis (TDA) and frequency domain analysis (FDA) are two commonly used analysis methods for analyzing the steady-state characteristics of 3p-DAB converters.…”

Section: Operating Principlementioning

confidence: 99%

Minimum current stress control strategy for three degree of freedom three-phase dual active bridge DC-DC converter

Zhang,

Wang

2024

J. Phys.: Conf. Ser.

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Compared to single-phase dual active bridge (1p-DAB) DC-DC converters, three-phase dual active bridge (3p-DAB) DC-DC converters have advantages such as high single machine power, high power density, small filtering capacitance, and are more suitable for high-voltage situations. Therefore, they have good application prospects in DC transmission and industrial high-power DC-DC converters. However, under traditional single-phase shift (SPS) control, especially in the low power range, there is a large reactive current and severe soft switch loss. This article adopts an asymmetric modulation strategy for its larger reactive power, which reduces its reactive power in the low power range with more degrees of freedom and improves the efficiency of power transmission. Taking current stress as the optimization objective, the KKT algorithm is used to solve, and the corresponding analytical solution is ultimately obtained. Finally, a simulation is built by using MATLAB software to verify the feasibility of the proposed solution.

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Section: Operating Principlementioning

confidence: 99%

Minimum current stress control strategy for three degree of freedom three-phase dual active bridge DC-DC converter

Zhang,

Wang

2024

J. Phys.: Conf. Ser.

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“…On the other hand, Refs. [15][16][17] proposed the asymmetric duty modulation (ADM) strategy by regulating the duty cycle of driving pulses of switches, which can achieve similar operating characteristics to phase-shift modulation. Further, Refs.…”

Section: Introductionmentioning

confidence: 99%

A Si IGBT/SiC MOSFET Hybrid Isolated Bidirectional DC–DC Converter for Reducing Losses and Costs of DC Solid State Transformer

Huang,

Wang,

et al. 2024

Electronics

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The DC solid state transformer (DCSST) is a crucial component for connecting buses of different voltage levels in the DC distribution grid. This paper proposes a Si IGBT/SiC MOSFET hybrid isolated bidirectional DC–DC converter and an optimized modulation strategy (OMS) to reduce the losses and costs of DCSST. Based on the analysis of topology and operating principles, a duty-cycle modulation strategy is proposed and the converter is modeled by the time domain analysis (TDA) method. Through the analysis of switching characteristics, an optimization problem is established, which aims to reduce the conduction losses of switches while ensuring zero-voltage switching (ZVS) for all switches and low-current turn-off for IGBTs simultaneously. The optimization problem is solved by the augmented Lagrangian genetic algorithm (ALGA), and the OMS for the proposed converter is deduced. Finally, a 2 kW experimental prototype with the primary voltage of 405–495 V and the secondary voltage of 150 V is built to verify the effectiveness of the proposed topology and OMS. The switching costs of the proposed converter is reduced by 27.3% and the efficiency is improved by up to 4.04% compared to the existing method.

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“…Similarly, a hybrid control including the primary asymmetric PWM control plus the secondary PS control is proposed for a hybrid-bridge based semidual-activebridge (S-DAB) converter to improve the efficiency at light load in [17]. For the full-bridge based DAB converter, [18] and [19] propose an efficiency-oriented hybrid duty modulation scheme and an optimal asymmetric duty modulation, respectively. Multi-degree-of-freedom controls can be obtained because of the increasing amount of power devices with asymmetric duty.…”

Section: Introductionmentioning

confidence: 99%

A Hybrid-Bridge-Based Dual Active Bridge Converter With Reduced Device Count

Liu²,

Wang

et al. 2022

IEEE Open J. Power Electron.

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In this paper, a hybrid-bridge-based dual-active-bridge (DAB) converter with a three-level (TL) half-bridge and a two-level full-bridge is proposed, which can be utilized to interface the medium voltage and low voltage DC. In the proposed converter, there are only eight power switches in total. Compared with the traditional hybrid-bridge-based DAB converter with a neutral-point-clamped (NPC) type TL half-bridge, a fewer power device count and higher efficiency can be realized in the proposed converter due to removing clamping diodes. Thus, a more compact circuit structure and a lower cost can be obtained. Moreover, zero-voltage-switching (ZVS) of all switches in primary-side and secondary-side can be achieved in the proposed converter. The operating principle, performances, and characteristics of the proposed converter are analyzed in detail. Also, a specification design case with a detailed key parameter design is given. Finally, a 1-kW experimental prototype is established to validate the proposed converter, and obtained experimental results are highly consistent with the theoretical analysis.Index Terms-Dual-active-bridge (DAB) converter, hybrid-bridge, compact structure, zero-voltage-switching (ZVS).

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Optimal Asymmetric Duty Modulation to Minimize Inductor Peak-to-Peak Current for Dual Active Bridge DC–DC Converter

Cited by 52 publications

References 20 publications

Minimum current stress control strategy for three degree of freedom three-phase dual active bridge DC-DC converter

Minimum current stress control strategy for three degree of freedom three-phase dual active bridge DC-DC converter

A Si IGBT/SiC MOSFET Hybrid Isolated Bidirectional DC–DC Converter for Reducing Losses and Costs of DC Solid State Transformer

A Hybrid-Bridge-Based Dual Active Bridge Converter With Reduced Device Count

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