Journal ArticleDOI
Soft FerritesߞProperties and Applications
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In this paper, the authors discuss the properties and applications of soft and hard ferrites and their applications in search-works, including the application of soft ferrite material from emc to rfid.Abstract:
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Citations
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Journal ArticleDOI
Computationally efficient winding loss calculation with multiple windings, arbitrary waveforms, and two-dimensional or three-dimensional field geometry
TL;DR: The squared-field-derivative method for calculating eddy-current (proximity effect) losses in round-wire or litz-wire transformer and inductor windings is derived in this paper.
Journal ArticleDOI
Cost-constrained selection of strand diameter and number in a litz-wire transformer winding
TL;DR: In this article, the relationship between wire size, normalized cost, and normalized loss is shown to have a general form that applies to a wide range of designs, and a practical design procedure is provided, applied to an example design, it leads to less than half the original loss at lower than the original cost, or, alternatively, under one fifth the original costs with the same loss as the original design.
Journal ArticleDOI
Experimental determination of stray capacitances in high frequency transformers
TL;DR: In this paper, the two-port network approach and the step-response approach are used for determining stray capacitances in a two-winding high frequency transformer for circuit simulation and computeraided design purposes.
Journal ArticleDOI
Measurements and performance factor comparisons of magnetic materials at high frequency
TL;DR: In this paper, the design of power magnetic components for operation at high frequency (HF, 3-30 MHz) has been hindered by a lack of magnetic material performance data and by the limited design theory in that frequency range.
Proceedings ArticleDOI
Core losses under DC bias condition based on Steinmetz parameters
TL;DR: In this paper, the Steinmetz premagnetization graph (SPG) is introduced to calculate core losses under DC bias conditions, and a detailed description of the test system is given, as high accuracy is crucial.
References
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Journal ArticleDOI
Improved Oil Recovery by High Magnetic Flux Density Subjected to Iron Oxide Nanofluids
Noorhana Yahya,Muhammad Kashif,Afza Shafie,Hasan Soleimani,Hasnah Mohd Zaid,Noor Rasyada Ahmad Latiff +5 more
TL;DR: In this article, a new enhanced antenna is used with iron oxide (Fe2O3) and zinc oxide (ZnO) nanofluids for oil recovery applications at the laboratory scale.
Proceedings ArticleDOI
A new model for the determination of copper losses in transformer windings with arbitrary conductor distribution under high frequency sinusoidal excitation
TL;DR: In this article, a new expression for the calculation of high frequency copper losses in transformer and inductor coils with round conductors, more general than the existent models and without any of the traditionally imposed assumptions and limitations, is proposed and established by finite element analysis and measurement results.
Journal ArticleDOI
Complete Modeling of Toroidal Inductors for High Power RF Applications
TL;DR: In this paper, a high frequency toroidal model is developed and used to calculate several critical inductor parameters such as inductance, resonance frequency, quality factor, power loss, flux density with good accuracy for high power RF applications.
Journal ArticleDOI
Transistor Inverter Design Optimization in the Frequency Range Above 5 kHz Up to 50 kVA
Jacobus D. Van Wyk,J.A. Ferreira +1 more
TL;DR: In this paper, the design of inverters for industrial applications including static power supplies, light welding equipment, and high-speed motor control at input voltages from 30 to 300 V are described.
Proceedings ArticleDOI
Energy harvesting of radio frequency and vibration energy to enable wireless sensor monitoring of civil infrastructure
TL;DR: This project develops two power harvesting technologies and a novel parametric frequency-increased generator (PFIG) is developed, and an RF scavenger operating at medium and shortwave frequencies has been designed and tested.