Query: magnetic circuit transformator

Candidate papers:

abstract: Highly accurate and thoroughly updated, this book has set the standard in electronic devices and circuit theory for over 28 years. Boylestad and Nashelsky offer readers a complete and comprehensive survey of electronics and circuits, focusing on all the essentials they will need to succeed on the job. This very readable book is supported by strong, helpful learning cues and content that is ideal for new workers in this rapidly changing field. Its colorful layout boasts a large number of stunning photographs. Topics covered include: semiconductor diodes, BJT devices, DC biasing, FET devices, Op Amp applications, power amplifiers, linear digital ICs, power supplies and voltage regulators, and other two terminal devices. An excellent reference work for anyone involved with electronic devices and other circuitry applications, such as electrical and technical engineers.
author_names: Robert L Boylestad

Louis Nashelsky
title: Electronic Devices and Circuit Theory
year: 1972

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author_names: Melanie Grunwald
title: Rf Circuit Design Theory And Applications
year: 2016

abstract: Modern imalat surecinde, transformator cekirdek saclari, 3 adet bacak, ust ve alt boyunduruk olmak uzere 5 adet kesilmis parcadan istiflenerek olusturulmaktadir. Cekirdek kayiplarinin en fazla olustugu orta bacak uzantisi olan T baglanti kismi ise farkli kesim acilarinda uretilmektedir. Bu calismada elektrik makinalari icin gelismis bir elektromanyetik analiz programi olan Ansoft Maxwell kullanilarak, 7 farkli T baglanti formu icin, toplam cekirdek kayiplari ve aki yogunlugu dagilimlari analiz edilmektedir. Ayrica calismada, farkli T baglanti tasarimlari icin olusan atil malzemedeki degisimler incelenmektedir. Calisma sonucunda, orta bacak boyunun mumkun oldugunca kisaltilmasinin, hem kayiplar hem de atil malzeme acisindan iyilestirmeye neden olacagi belirlenmistir.
author_names: A Kenan Karademir

Mehmet Kubilay Eker
title: Transformator T baglanti yapisinin cekirdek kayiplarina etkisi
year: 2016

abstract: ContentsA three dimensional analysis of the quasistationary leakage magnetic field of a three phase transformer with disk windings is presented. A simplified mathematical model of the transformer based on Maxwell's equations has been applied. Computational results of the short circuit reactance for the symmetrical and asymmetrical disk windings have been compared with analytical ones according to Richter's formulas [8] For the magnetic field calculation, the finite difference method with the application of fast calculating subroutines has been used.UbersichtEs wird eine dreidimensionale Analyse des quasistationaren magnetischen Streufeldes eines dreiphasigen Transformators mit Scheibenwicklung dargestellt. Dazu wird ein vereinfachten mathematisches Modell eines Transformators auf der Basis der Maxwell Gleichungen angewandt. Die numerischen Ergebnisse der Kurzschlussreaktanz fur symmetrische und unsymmetrische Scheibenwicklung wurden mit den analytischen Ergebnissen nach R. Richter [8] verglichen.Fur die Berechnung des magnetischen Feldes wurde ein Differenzenverfahren mit schnellen numerischen Prozeduren verwendet.
author_names: Marian Lukaniszyn

Rolf Unbehauen
title: The 3 D calculations of the leakage magnetic field and the short circuit reactance in a transformer with disk windings
year: 1995

abstract: Inrush current adalah arus transient dengan amplitude tinggi yang terjadi pada saat transformator daya diberikan power (dienergized).n Besar amlitudonya bisa 5.6n kali arus normalnya. waktu transient ini kurang dari 60 ms. Lonjakan arus masukn pada saat transformator daya energizedn dapat menyebabkan gangguan dan kerusakan pada komponen sistem lainnya. Makalah ini menjelaskan metode analisis yang akurat yang dapat digunakan untuk menemukan lonjakan arus masuk arus dalam transformator 3 fasa yang umum digunakan. Metode ini merupakan perpanjangan dari yang sebelumnya dijelaskan untuk menghitung lonjakan arus dalam transformator fasa tunggal. Metode ini sangat kuat karena arus dan pembusukannya dapat dihitung selama banyak siklus, bukan hanya puncak pertama, seperti yang dimungkinkan oleh metode lainnya. Perbandingan dilakukan antara koneksi transformator yang berbeda dan diilustrasikan dengan contoh numerik. Ini menunjukkan, misalnya, bahwa hambatan pada netral dari transformator yang terhubung dengan bintang memiliki sedikit efek dibandingkan dengan menggunakan hambatan yang sama secara seri dengan gulungan berenergi. Kata kunci Inrush current, Tranformer,n Efect derajat (sudut) switching Efect fluks remanen, Efect resistansi sumber.
author_names: Mohammad Ikhsan Arief
title: PERHITUNGAN DAN ANALISIS INRUSH CURRENT PADA TRANSFORMATOR BERBASIS PARAMETER TRANSFORMATOR
year: 2018

abstract: An equivalent circuit model for planar printed circuit board (PCB) transformers is presented. The model utilizes the 1 D analysis of Maxwell's equations to develop a frequency dependent representation of a multilayer, planar PCB transformer that can be implemented in the circuit simulation software. In this transformer model, each conductor layer is implemented as a complex impedance network, while each insulator layer is implemented as an air cored inductor. Each magnetic core layer is modeled as a non linear inductance whose magnetic characteristic is based on a temperature dependent Jiles Atherton hysteresis model. These impedances and inductances are then arranged side by side as they are arranged in the layer stack of the actual planar PCB transformer. Through this model, the skin and proximity effect in the conductors and current distribution across windings can be simulated. The developed model also enables the modeling of temperature dependent hysteresis and saturation effects in the magnetic material. The model provides a simpler method to derive the core and winding loss of the transformer than using a finite element analysis software. It also enables direct integration to circuit simulation tools. A prototype planar PCB transformer was used to obtain experimental data for model validation. Comparisons made show good agreement between the performance of the model and experimental results.
author_names: Lew Andrew R Tria

Daming Zhang

John Edward Fletcher
title: Planar PCB Transformer Model for Circuit Simulation
venue: IEEE Transactions on Magnetics
year: 2016

abstract: Transformers of high frequency resistance spot welding systems are considered. The equivalent circuit of a three winding transformer, which is obtained by replacing it with two two winding transformers, is used. It is shown that the magnetic coupling factor for the leakage fluxes of these two winding transformers influences on the output current. The study of the transformers includes both 2D eddy current FEA analysis for estimation the leakage impedance and the circuit simulation, which gives the output current. The results are used to design economical welding transformers. The calculation results are confirmed experimentally. Streszczenie. Zaprojektowano transformator do wsokoczestotliwosciowego punktowego zgrzewania. Przeprowadzono analize rozkladu pradow wiroychw celu uwzglednienia impedancji uplywowej oraz zaproponowano schemat zastepczy transformatora trzy uzwojeniowego otrzymanego przez zastapienie dwoch transformatorow dwu uzwojeniowych. Modelowanie wysokoestotliwosciowego transform,atora do rezystancyjnego zgrzewania
author_names: I SakhnoLyudmila

I SakhnoOlga

D Likhachev

Philip Yu Fedorov
title: Field circuit modelling of the resistance spot welding transformers
year: 2017

abstract: The materials and the fabrication of planar magnetic components for switch mode power supplies (SMPSs) and other applications are reviewed. The advantages and the disadvantages of such devices are introduced. The magnetic materials used in the devices, such as ferrite, amorphous metallic glass, and thin and thick magnetic films, are detailed. The devices have varying degrees of planarization partially planar devices with magnetic cores and planar windings and truly planar devices for integrated magnetic circuits with planar windings and planar magnetics. Devices of both types reported in the literature since 1979 are reviewed. The design of the planar magnetic components must be optimized with respect to losses, and design issues which relate to electrical, thermal, and mechanical performance are discussed.
author_names: M T Quirke

J J Barrett

M Hayes
title: Planar magnetic component technology a review
year: 1992

abstract: The electric field which is induced by geomagnetic storms drives currents in technological systems, such as electric power transmission grids, oil and gas pipelines, telecommunication cables, and railway equipment. These geomagnetically induced currents (GIC) cause problems to the systems. In power grids, transformers may be saturated due to GIC resulting in harmful effects and possibly even to a collapse of the whole system, as occurred in Quebec in March 1989. Transformers may also suffer from permanent damage. In buried pipelines, GIC can enhance corrosion and interfere with corrosion control surveys. Telecommunication systems as well as railway equipment may also malfunction due to GIC. The electric and magnetic fields observed at the Earth's surface primarily depend on magnetospheric ionospheric currents and secondarily on currents induced in the Earth. The physical background and modeling of GIC are discussed in this paper. Special attention is paid to basic principles necessarily understood to get an insight into GIC phenomena. Recent developments in the use of the Complex Image Method (CIM) permit fast and accurate computations of the electric field suitable for time critical applications like GIC forecasting.
author_names: Risto J Pirjola
title: Geomagnetically induced currents during magnetic storms
year: 2000

abstract: Transformatorler, bir elektrik devresinden digerine manyetik kuplaj ile enerji gecisi saglayan bir elektrik makinasidir. Gerilim donusturme islemindeki basitlikleri, guvenilirlikleri ve ekonomiklikleri nedeniyle transformatorler cok iyi bilinen elektrik makinalarindan biridir. Yuzyili askindir onun temel yapisi, kullandigi malzemeler ve tasarim prensipleri cok az degisiklik gostermistir; bununla birlikte transformator tasarim ve malzemelerini gelistirme calismalari devam etmektedir. Bu calismada, uc fazli transformator tasarimi icin bir grafik kullanici arayuz (GUI) programi sunulmustur. Arayuz programi, MATLAB programinin GUIDE bileseni ve bilgisayar grafikleri teorisindeki lineer donusum matrisleri kullanilarak gelistirilmistir
author_names: Ahmet Altintas
title: Uc Fazli Transformator Tasarimi Icin Bir Arayuz Programi
year: 2008