Power-Dense Bi-Directional DC–DC Converters With High-Performance Inductors

Calderon-Lopez, Gerardo; Scoltock, James; Wang, Yiren; Laird, Ian; Yuan, Xibo; Forsyth, A.J.

doi:10.1109/tvt.2019.2943124

Cited by 30 publications

(12 citation statements)

References 24 publications

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“…In case of an increase of converter FOM, the losses on the passive components increase which requires either a better cooling solution or an increase in the converter volume. A well-optimized non-isolated buck and boost converter design is proposed in [28] with 80 kW power and 115 kHz of switching frequency. The passive components and other converter elements are optimized with respect to the switching frequency, so a successful design is obtained as presented with notation A 1 in Figure 27.…”

Section: Discussionmentioning

confidence: 99%

Feasibility of Quasi-Square-Wave Zero-Voltage-Switching Bi-Directional DC/DC Converters with GaN HEMTs

Karakaya¹,

Gülsuna²,

Keysan³

2021

Energies

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There are trade-offs for each power converter design which are mainly dictated by the switching component and passive component ratings. Recent power electronic devices such as Gallium Nitride (GaN) transistors can improve the application range of power converter topologies with lower conduction and switching losses. These new capabilities brought by the GaN High Electron Mobility Transistors (HEMTs) inevitably changes the feasible operation ranges of power converters. This paper investigates the feasibility of Buck and Boost based bi-directional DC/DC converter which utilizes Quasi-Square-Wave (QSW) Zero Voltage Switching (ZVS) on GaN HEMTs. The proposed converter applies a high-switching frequency at high output power to maximize the power density at the cost of high current ripple with high frequency of operation which requires a design strategy for the passive components. An inductor design methodology is performed to operate at 28 APP with a switching frequency of 450 kHz. In order to minimize the high ripple current stress on the output capacitors an interleaving is performed. Finally, the proposed bi-directional converter is operated at 5.4 kW with 5.24 kW/L or 85.9 W/in3 volumetric power density with air-forced cooling. The converter performance is verified for buck and boost modes and full load efficiencies are recorded as 97.7% and 98.7%, respectively.

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Section: Discussionmentioning

confidence: 99%

Feasibility of Quasi-Square-Wave Zero-Voltage-Switching Bi-Directional DC/DC Converters with GaN HEMTs

Karakaya¹,

Gülsuna²,

Keysan³

2021

Energies

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“…For this reason, the goals of maximising power density and efficiency should be addressed by better exploiting the available materials and technologies. The design of inductors for power electronic converters represents a significant challenge that involves the evaluation of the compromise between conflicting goals, defined by the high efficiency and the high power density requirements [2][3][4][5][6][7]. The present analysis is focused on the output inductor of DC-DC buck converters.…”

Section: Introductionmentioning

confidence: 99%

Data-Driven Constraint Handling in Multi-Objective Inductor Design

et al. 2023

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This paper analyses the multi-objective design of an inductor for a DC-DC buck converter. The core volume and total losses are the two competing objectives, which should be minimised while satisfying the design constraints on the required differential inductance profile and the maximum overheating. The multi-objective optimisation problem is solved by means of a population-based metaheuristic algorithm based on Artificial Immune Systems (AIS). Despite its effectiveness in finding the Pareto front, the algorithm requires the evaluation of many candidate solutions before converging. In the case of the inductor design problem, the evaluation of a configuration is time-consuming. In fact, a non-linear iterative technique (fixed point) is needed to obtain the differential inductance profile of the configuration, as it may operate in conditions of partial saturation. However, many configurations evaluated during an optimisation do not comply with the design constraint, resulting in expensive and unnecessary calculations. Therefore, this paper proposes the adoption of a data-driven surrogate model in a pre-selection phase of the optimisation. The adopted model should classify newly generated configurations as compliant or not with the design constraint. Configurations classified as unfeasible are disregarded, thus avoiding the computational burden of their complete evaluation. Interesting results have been obtained, both in terms of avoided configuration evaluations and the quality of the Pareto front found by the optimisation procedure.

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“…Considering the ever-increasing developments of clean and renewable energy sources all over the world in recent years, three principal performance requirements of power inductors used in various power electronic circuits are the small size, high current and low loss. For the operations of six basic DC-DC converters of Buck, Boost, Buck-Boost, Cuk, Sepic and Zeta, and a number of modified chopper circuits [2,3], power inductors are generally controlled by a series of electronic power switches to charge and discharge repeatedly for implementing continuous electromagnetic energy interactions between highvoltage side and low-voltage side. However, high-frequency operations cause serious magnetic loss inside the cores and high copper loss inside the windings due to combined effects of hysteresis, eddy, skin and proximity phenomena.…”

Section: Introductionmentioning

confidence: 99%

An ultra‐low‐loss superconducting inductor for power electronic circuits

Chen

Gou

Chen

et al. 2022

IET Power Electronics

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To break through the bottlenecks of the loss and size of conventional conductors and magnetic materials, replacing copper inductors by zero‐resistance superconducting inductors can be a promising solution. The experimental, theoretical and numerical investigations into the loss characteristics of an air‐core superconducting inductor have been carried out. All these results show that the loss from a superconducting inductor in the boost chopper circuit was reduced remarkably up to 373 times smaller than the loss from the magnetic‐core copper inductor having the same conditions. Moreover, the actual volume and weight of the superconducting inductor are only 5.61% and 10.97% of those of the copper inductor having the same inductance and current capacities. Advanced numerical models have been built to verify the experiments that their results of superconducting losses as well as the current and frequency dependencies are well matched. A compact, low‐loss and low‐cost cryostat has been designed to accommodate the superconducting inductor, which can further improve the practicability for superconducting inductor to be equipped into various power electronic applications. The superconducting inductor can lead power electronic devices towards ultra‐high‐efficiency power conversion.

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Power-Dense Bi-Directional DC–DC Converters With High-Performance Inductors

Cited by 30 publications

References 24 publications

Feasibility of Quasi-Square-Wave Zero-Voltage-Switching Bi-Directional DC/DC Converters with GaN HEMTs

Feasibility of Quasi-Square-Wave Zero-Voltage-Switching Bi-Directional DC/DC Converters with GaN HEMTs

Data-Driven Constraint Handling in Multi-Objective Inductor Design

An ultra‐low‐loss superconducting inductor for power electronic circuits

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