Design methodology and fabrication process of a microinductor for the next generation of DC–DC power converters

Flynn, David; Desmulliez, Marc Phillipe Yves

doi:10.1007/s00542-009-0820-7

Cited by 5 publications

(5 citation statements)

References 11 publications

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“…It is known as saturation magnetization M s , to the maximum value achieved once the overall magnetic atomic moments are aligned in parallel [45], [46]. In contrast, magnetic remanence (M r ) refers to the residual magnetization that stay in the material once the applied field is restored to zero [1], [6]. On the other hand, the inverse field necessary to reduce the magnetization to zero is known as coercivity (H c ) [37].…”

Section: Fundamentals Of Magnetic Materialsmentioning

confidence: 99%

“…Generally, a set of parameters from material and final application must be combined to determine the most feasible option. Some design restrictions are listed to follow: maximum power, stability, efficiency, input and output voltage levels, operation frequency, thermal stability, system cooling, portability, energy losses and cost [1], [78]. Table 6 summaries the most relevant parameters [52], [61], [69], [77], [78], [89], [99], [107], [108].…”

Section: Comparison Of Ferromagnetic Materials Used In Pecmentioning

confidence: 99%

“…Since the beginning of the electronic, digital electronic has been a huge step in human evolution, achieving to reduce the size of its components. However, the design of power supplies that feed the electronic boards is still a frequent development topic [1]. Many electronic components, including the aforementioned, use inductors with magnetic cores, so a reduction in their size and improvements is desirable.…”

Section: Introductionmentioning

confidence: 99%

“…For this reason, the design of magnetic components requires a high accuracy fabrication. For instance, geometric characteristics are in function of electrical excitation signals, current density, magnetic flux, energy losses, among others [1], [20], [21]. Currently, there are three kind of materials leading the fabrication of transformers and inductors; these are: ferrite, powder core, and nanocrystal alloy [22].…”

Section: Introductionmentioning

confidence: 99%

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Advanced Ferromagnetic Materials in Power Electronic Converters: A State of the Art

et al. 2020

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Currently, the design of power electronic converters (PECs) is in a stage which looks increasing its efficiency and reducing its dimensions from basic topologies through precise analysis of losses in each device that conforms. Although there have been important advances to improve the active components of PECs, passive components, particularly inductors, have changed very little since several decades ago, and those begin a limiting factor, when a high efficiency at very high power and switching frequency, are required. It is for the foregoing that this paper reviews new ferromagnetic materials to construct inductors and achieve a substantial increasing in efficiency through magnetic permeability and hysteresis improvements. Therefore, the main objective of this work is to position the reader in the state of the art of advanced ferromagnetic materials used in PECs. Details about how they are constructed and qualitative comparison of their dynamic behavior are provided. Also, estimation methods of energy losses, applications for different types of material, and its influence on the performance of some basic PECs are presented. INDEX TERMS Amorphous magnetic materials, magnetic materials, power conversion, soft magnetic materials.

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Section: Fundamentals Of Magnetic Materialsmentioning

confidence: 99%

Section: Comparison Of Ferromagnetic Materials Used In Pecmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Advanced Ferromagnetic Materials in Power Electronic Converters: A State of the Art

et al. 2020

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“…Inductors are an integral part of power electronic circuits. Nowadays, there is a great effort underway to miniaturize inductors to enable fully integrated singlechip electrical power converters [1][2][3][4][5][6]. This motivates the need for high-inductance-density and high-Q (efficient) microfabricated inductors with form factors that are amenable for integration or co-packaging with silicon integrated circuits (low profile and small areal footprint).…”

Section: Introductionmentioning

confidence: 99%

Microelectromechanical inductors with high inductance density via mechanical energy storage

Divakar

Zhang²,

Zito³

et al. 2012

J. Micromech. Microeng.

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This paper reports the design, fabrication and testing of microelectromechanical inductors (MEMIs) that show high electrical inductance by storing energy via a mechanically compliant flexure. The microfabricated MEMI structures comprise a simple electroplated Cu beam that is placed in a static magnetic field. Upon application of ac current, the conductor vibrates via electrodynamic interactions with the magnetic field. This electromechanical behavior manifests as a highly reactive (inductive) one-port electrical impedance. In this work, we explain the microfabrication processes and the subsequent characterization of a variety of test structures, which exhibit a peak quality factor up to 5.6 with net areal inductance densities of up to 3.5 µH/mm 2. These devices are envisioned as a passive energy storage component for exploring high-power-density electrical power converters.

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A Low Complexity Design Framework for NFC-RFID Inductive Coupled Antennas

et al. 2020

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Inductive Wireless Power and Data Transfer (WPDT) technology has become a vital enabler to the globalisation of Internet of Things. Driven by an increasing demand for data within applications and by the need to reduce the devices footprint by transmitting data and power with the same antenna, power transfer efficiency has become a barrier to WPDT systems' performance. To overcome the limitations of power transfer efficiency, current research focuses on the design of efficient integrated circuits and does not consider the challenges of inductive antennas' design and system integration. Hence, current system integration methods used in industry to design receivers for WPDT applications still require expensive experimental benchmarking of antennas. This paper introduces a new framework for inductive WPDT systems integration that focuses on the design of inductive coils and tuning capacitances. First, this framework proposes a new planar rectangular coil inductance formula that achieves an average error of 11% based on the testing of one hundred of coils, which out performs the current state of the art. Then, based on a detailed electrical model of both transmitter and receiver of WPDT systems, our design framework computes the coils geometric parameters and tuning capacitances that will optimize the overall efficiency of the WPDT system. Unlike state of the art design approaches, the main advantage of this framework is that it does not require expensive benchmarking of inductive antennas to find the optimal antenna. Verification of our design framework was achieved through a comparative analysis for Very High Bit Rate 13.56 MHz RFID applications. Results indicate an improvement of more than 15% in overall system power transfer efficiency compared to current state of the art methods within a comparatively more cost effective framework. A sensitivity analysis provides an insight and practical guide to implications of manufacturing variances in component parameters.

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Design methodology and fabrication process of a microinductor for the next generation of DC–DC power converters

Cited by 5 publications

References 11 publications

Advanced Ferromagnetic Materials in Power Electronic Converters: A State of the Art

Advanced Ferromagnetic Materials in Power Electronic Converters: A State of the Art

Microelectromechanical inductors with high inductance density via mechanical energy storage

A Low Complexity Design Framework for NFC-RFID Inductive Coupled Antennas

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