Magnetic Materials and Design Trade-Offs for High Inductance Density, High-Q and Low-Cost Power and EMI Filter Inductors

Sun, Tao; Raj, P. Markondeya; Min, Jun‐Ki; Wu, Zihan; Sharma, Himani; Takahashi, Tadashi; Takemura, Keiji; Yun, Hobie; Carobolante, Francesco; Tummala, Rao

doi:10.1109/ectc.2016.264

Cited by 7 publications

(3 citation statements)

References 6 publications

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“…Currently, the most commonly used magnetic components for high-frequency applications use ferrite, air, and nanocrystalline magnetic cores [1][2][3][4][5][6][7][8][9][10][11][12][13]. The problem with using ferrite cores is that they have a low saturation flux density, typically between 0.2 and 0.5 T, whereas air-core inductors have drawbacks with unwanted stray inductances, causing electromagnetic interference that can affect nearby devices [14][15][16]. Regarding the nanocrystalline cores, these belong to the category of the so-called "soft magnetic composites", which have presented good magnetic properties such as high saturation flux density, high permeability, and a high Curie temperature, in addition to being more resistant in structure compared to ferrite cores [17,18].…”

Section: Introductionmentioning

confidence: 99%

“…Electronics 2022, 11, x FOR PEER REVIEW 2 of 18 affect nearby devices [14][15][16]. Regarding the nanocrystalline cores, these belong to the category of the so-called "soft magnetic composites", which have presented good magnetic properties such as high saturation flux density, high permeability, and a high Curie temperature, in addition to being more resistant in structure compared to ferrite cores [17,18].…”

Section: Introductionmentioning

confidence: 99%

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High-Power-Factor LC Series Resonant Converter Operating Off-Resonance with Inductors Elaborated with a Composed Material of Resin/Iron Powder

et al. 2022

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The most common problems with magnetic cores in high-stress applications are changes in their permeability and low saturation flux density, forcing designers to use special nanocrystalline cores, which raises the overall cost of the circuit. This paper evaluates the performance of a low-cost magnetic material composed of unsaturated polyester la mination resin COR61-AA-531EX and 200 mesh iron powder with a grain size of 74 µm, which has magnetic properties of the so-called “soft magnetic composites”, which have good magnetic characteristics in high-frequency and high-stress applications. This composite material was used for the elaboration of magnetic cores for the inductors of a resonant converter, which aims to achieve a high power factor, where in this type of application, there are large current and voltage excursions in the magnetic components that vary between high and low frequencies, being a suitable application for testing the inductors with a magnetic core of resin/iron powder. The converter was designed to operate off-resonance at different switching frequencies from 300 kHz to 800 kHz to feed a resistive load with a power output of 19 watts. The operation of the circuit was experimentally validated using a resistive load at the output, validating the theoretical analysis and achieving a power factor above 98%.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High-Power-Factor LC Series Resonant Converter Operating Off-Resonance with Inductors Elaborated with a Composed Material of Resin/Iron Powder

et al. 2022

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“…They consist of integrated structures, realized according to the printed circuit board technology, and use appropriate packaging technologies to obtain good performance at high frequencies and a more compact layout. The distinctive feature of the integrated filters is a planar structure that realizes inductors and capacitors [12,13]. Despite their compactness, the passive integrated EMI filters present some limitations, such as poor heat dissipation, leading to reduced efficiency with respect to discrete filters [14].…”

Section: Introductionmentioning

confidence: 99%

An Evolutionary EMI Filter Design Approach Based on In-Circuit Insertion Loss and Optimization of Power Density

et al. 2020

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Power density is one of the most significant issues in designing electromagnetic interference (EMI) filters for power electronic-based applications. Therefore, an effective EMI filter design should consider both its capability to ensure the compliance with the related EMI standard limits and the possibility to build it by suitable components leading to the most compact configuration as well. To fulfill the above requirements, in this paper, an automatic procedure to get an improved design of EMI filters is proposed. Specifically, according to the proposed method, the values of filter parameters for both common mode (CM) and differential mode (DM) sections are selected by a genetic algorithm (GA) exploiting the in-circuit insertion loss, thus obtaining a more effective design. Besides, the components that set up the filter are selected by a rule-based procedure searching through a suitable database of commercial components to identify those allowing for the maximum power density. Experimental tests were performed using an inverter-fed induction motor drive as a case study, and the obtained results have demonstrated the validity of the proposed approach.

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AC to DC Converter Execution using EMI Filtration System

Kathir¹,

Venkatasubramanian²,

Sivakumar

et al. 2023

2023 IEEE International Conference on Integrated Circuits and Communication Systems (ICICACS)

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Magnetic Materials and Design Trade-Offs for High Inductance Density, High-Q and Low-Cost Power and EMI Filter Inductors

Cited by 7 publications

References 6 publications

High-Power-Factor LC Series Resonant Converter Operating Off-Resonance with Inductors Elaborated with a Composed Material of Resin/Iron Powder

High-Power-Factor LC Series Resonant Converter Operating Off-Resonance with Inductors Elaborated with a Composed Material of Resin/Iron Powder

An Evolutionary EMI Filter Design Approach Based on In-Circuit Insertion Loss and Optimization of Power Density

AC to DC Converter Execution using EMI Filtration System

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