Design, analysis and implementation of a new three‐port DC‐DC converter with bidirectional capability

Jalilzadeh, Tohid; Rostami, Naghi; Babaei, Ebrahim; Hosseini, Seyed Hossein

doi:10.1049/pel2.12196

Cited by 8 publications

(4 citation statements)

References 31 publications

(82 reference statements)

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“…The fully-regulated bus has three unidirectional converters -one additional battery charging regulator (BCR) and one additional battery discharging regulator (BDR), compared to the unregulated topology, thereby enabling a constant bus voltage. Some articles used a bidirectional converter to realize the function of BCR and BDR which doesn't change the power flow count [18], [19]. However, during battery charging and discharging, the converter loss is higher.…”

Section: A Construction Methodsmentioning

confidence: 99%

Topology of a Three-Port Converter for High-Altitude Platforms

Liu

et al. 2022

IEEE Access

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Three-port converter (TPC) with non-regulated bus cannot meet the voltage stability demands of high-altitude platforms (HAPs) during daytime operations. In contrast, full-regulated bus TPC is complex in topology and inferior in power density, although it can maintain voltage stability across whole day operations. Therefore, semi-regulated bus TPCs are more suitable for this scenario, which can not only maintain voltage stability during daytime operations, but also have simple topology. However, conventional semi-regulated bus structure converts the power twice, leading to lower efficiency and power density. In order to overcome this problem, the paper proposes a novel semi-regulated bus TPC that can be used on high-altitude platforms. The topology only has one conversion between the ports. It regulates the bus voltage during the day and prevents the loss of diode during the night by directly discharging through the MOSFET and achieving high efficiency. The paper adopts GaN devices to elevate the working frequency to further improve the power density, and conduct a theoretical analysis for all working modes and provide key equations. The closed-loop transfer function of the system is deduced for stability analysis. The results show that the proposed topology has high efficiency and power density.INDEX TERMS Aerospace vehicles, Boost, High efficiency, Semi-regulated bus, Three-port converter.

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Section: A Construction Methodsmentioning

confidence: 99%

Topology of a Three-Port Converter for High-Altitude Platforms

Liu

et al. 2022

IEEE Access

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“…This intrinsic factor is evident in hybrid systems. Using multi-input converter is one of the basic solutions to solve this issue in hybrid systems that have two or more input sources [4][5][6][7][8]. Since renewable energies including photovoltaic systems, fuel cells, wave energy etc.…”

Section: Introductionmentioning

confidence: 99%

Dual‐input single‐output high step‐up DC–DC converter for renewable energy applications

Mohammadi,

Khorsandi

2024

IET Power Electronics

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This paper introduces a dual‐input single‐output (DISO) non‐isolated DC–DC converter with the capability to accommodate multiple input ports. It supports both bidirectional and unidirectional power flows. The proposed converter employs the switched‐capacitors (SC) technique, resulting in a high‐ voltage transfer gain. Although the use of the SC technique leads to discontinuous input current, this issue has been addressed by incorporating an inductor at the input side. The DISO high‐voltage gain converter offers flexible control options, reduces current and voltage stress on semiconductors, and imposes no duty cycle limitations due to the proposed switching methods. Furthermore, when Port 2 fails, the proposed converter can transfer energy to the load by sources in Port 1 without interruption. The steady‐state model and small‐signal analysis (SSA) of the proposed converter are examined at continuous conduction mode (CCM). To evaluate accurately, the proposed converter is compared with the recently presented converters based on important characteristics. Additionally, a comprehensive power loss analysis is performed. Following the design specifications, an evaluation and testing of a prototype are conducted to verify the feasibility and performance of the converter.

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“…Numerous voltage-boosting techniques are employed by conventional step-up structures to maintain adequate duty cycles and efficiency while maximizing voltage conversion ratios. These include voltage lift, switched capacitors (SC), voltage multipliers (VM), switched inductors (SL), interleaving, coupledinductors (CI), and cascading [5], [6], [9], [10], [11]. The topologies presented in [12], [13], and [14] use interleaved and CI techniques.…”

Section: Introductionmentioning

confidence: 99%

A New High Voltage Gain Active Switched-Inductor Based High Step-Up DC–DC Converter With Coupled-Inductor

Imanlou,

Najmi,

Behkam

et al. 2023

IEEE Access

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This paper propounds a new high step-up DC-DC topology based on the active switchedinductor (A-SL) technique, which utilizes a coupled inductor (CI) for performance enhancement. Among the features of the presented topology are the following: (a) Better voltage gain (VG) and efficiency, (b) Since there are low voltages across power switches, it is possible to reduce the amount of power that is lost as a result of using MOSFETs with a low voltage rating and reduced internal resistance, (c) By reducing the turn ratio of the CI, the VG is enhanced, (d) Through the series connection of a capacitor with the CI primary winding, zero DC bias is achieved, and the core saturation problem is solved, (e) Input current division between input inductors and switches, (f) There is no limitation on duty cycle (0 < D < 1), and (g) Simple switching patterns and simultaneously driven switches. The propounded converter's operation principle and steadystate analysis are explained in detail, and parasitic elements' effects on VG and efficiency are examined. In addition, the VG, the number of components, and the voltage tension on power switches, diodes, and capacitors are compared and analyzed. An experimental laboratory prototype with 30V input and 400V output voltage is used to verify the validity of the study and the performance of the propounded topology.INDEX TERMS Active switched-inductor, coupled-inductor, DC-DC converter, high voltage gain.

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Design, analysis and implementation of a new three‐port DC‐DC converter with bidirectional capability

Cited by 8 publications

References 31 publications

Topology of a Three-Port Converter for High-Altitude Platforms

Topology of a Three-Port Converter for High-Altitude Platforms

Dual‐input single‐output high step‐up DC–DC converter for renewable energy applications

A New High Voltage Gain Active Switched-Inductor Based High Step-Up DC–DC Converter With Coupled-Inductor

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