Evaluation of High-Current Toroid Power Inductor With NdFeB Magnet for DC–DC Power Converters

Dang, Zhigang; Qahouq, Jaber A. Abu

doi:10.1109/tie.2015.2436361

Cited by 31 publications

(8 citation statements)

References 28 publications

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“…To address the aforementioned challenges, several magnetic control-based small-scale proof-of-concept converters are proposed in [8][9][10][11][12][13]. They can be categorised as variable inductor (VI), magnetorheological fluid, and permanent magnet-based converters.…”

Section: Introductionmentioning

confidence: 99%

Performance enhancement of powertrain DC–DC converter using variable inductor

Beraki

Trovão

Perdigão

2021

IET Electrical Syst in Trans

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Performance enhancement of a powertrain DC-DC converter is provided using a current-controlled magnetic device, the variable inductor (VI). The VI is composed of two groups of windings, main and auxiliary. The auxiliary winding is used to regulate the permeability of the magnetic core over a wide range of load variations. To regulate the saturation level of the magnetic core and avoid postsaturation operation of the power inductor, an appropriate level of auxiliary winding current is needed. To this end, a simple and dynamic strategy is proposed to estimate the auxiliary winding currents of the VI. The proposed approach is validated using simulation studies of a large-scale VI-based powertrain DC-DC converter. The results reveal the significance of the proposed approach in continuous regulation of the magnetic property of the power inductor core, enhancing powertrain DC-DC converter performance by up to 13.70% and reducing stress on switching devices by 17.87%. Furthermore, energy source current variation is reduced by 6.73%, leading to reduced stress on energy storage systems.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Introductionmentioning

confidence: 99%

Performance enhancement of powertrain DC–DC converter using variable inductor

Beraki

Trovão

Perdigão

2021

IET Electrical Syst in Trans

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“…Thus, it is difficult to obtain an optimal result. In recent years, the optimisation design of power inductors has gradually become one of the research hotspots [21–25], and the design of transformers is similar to that of inductors in many aspects [26–29]. Yu et al [23] attempted to establish a mathematical model of a transformer/inductor optimisation design based on the existing conventional loss and temperature rise calculation methods.…”

Section: Introductionmentioning

confidence: 99%

“…Yu et al [23] attempted to establish a mathematical model of a transformer/inductor optimisation design based on the existing conventional loss and temperature rise calculation methods. The authors in [24, 25] added permanent magnets or auxiliary windings to an air‐gap inductor to provide a DC magneto‐motive force (MMF) to adjust the inductor's operating point, thereby significantly reducing the core size. However, the applicability of this method in large‐capacity inductors still needs to be verified.…”

Section: Introductionmentioning

confidence: 99%

Design of highly compact short‐time duty power inductors for supercapacitor charging applications

Zhang

Wang

Xiao

et al. 2020

IET power electron.

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For medium‐voltage, large‐capacity, multi‐output supercapacitor charging applications, power inductors play an important role in filtering and energy storage. For a short‐time duty power inductor, the major design challenge is accurate transient thermal prediction, which goes beyond the scope of the empirical method. A transient thermal model that considers water‐cooling plates was constructed to predict thermal performance. On this basis, this study presents a novel multi‐objective optimisation design method, where the analytical method and the finite‐element method were combined through programming control to balance accuracy and efficiency. Furthermore, a short‐time duty 400 kW/182 A/2 kHz/15 kV power inductor prototype was designed and manufactured. Compared with the results of the 30‐minute thermal experiment, the calculation error is no >7.0%, which is significant for the accurate and highly compact design of the short‐time duty power inductor.

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“…The interleaved architecture is only suited for high power levels. In reference [10], a small piece of permanent magnet is added in to the air gap. The permanent DC magnetic field will double the saturation current with the same size of inductor.…”

mentioning

confidence: 99%

Design of Boost-Type Power Factor Correction With Stepped Air-Gap Ferrite Inductor for Peak-Power-Load Condition

et al. 2022

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This paper presents the designed method and the implementation of stepped air-gap ferrite inductor applied in power factor correction (PFC). Conventionally, the input inductor of the PFC has a designed consideration on the maximum output power; thus, designing the PFC for peak-power-load conditions results in a very large inductor. The proposed designed method improves the load-carrying capability without increasing the volume of the inductor when the PFC is operating in peak-power-load conditions. The stepped air-gap ferrite inductor maintains the inductance in the rated-full-load and sustains the peak-power-load conditions with the lower inductance. Compared with the convectional ferrite inductor, the proposed method can maintain the size and the efficiency of the power supply, and promote the powercarrying ability. The detailed analysis and the design of the proposed method are described. Experimental results are recorded and evaluated by a prototype PFC with an AC input voltage of 110-264 VAC and a DC output voltage of 384 VDC. Finally, the volume of input inductor is kept with 40950 mm 2 , the efficiency is also same compared with the conventional inductor, and the load-carrying capability of the converter is promoted from the normal rated power of 1 kW to the peak power load of 2 kW.

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Evaluation of High-Current Toroid Power Inductor With NdFeB Magnet for DC–DC Power Converters

Cited by 31 publications

References 28 publications

Performance enhancement of powertrain DC–DC converter using variable inductor

Performance enhancement of powertrain DC–DC converter using variable inductor

Design of highly compact short‐time duty power inductors for supercapacitor charging applications

Design of Boost-Type Power Factor Correction With Stepped Air-Gap Ferrite Inductor for Peak-Power-Load Condition

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