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Click here to read about RF CafeKirt Blattenberger

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Transformer Design References
A transformer is a device that transfers electrical energy from one circuit to another through inductively coupled conductors — the transformer's coils or "windings". Except for air-core transformers, the conductors are commonly wound around a single iron-rich core, or around separate but magnetically-coupled cores. A varying current in the first or "primary" winding creates a varying magnetic field in the core (or cores) of the transformer. This varying magnetic field induces a varying electromotive force (EMF) or "voltage" in the "secondary" winding. This effect is called mutual induction. -Wikipedia


Transformers Manufacturers & Service


Transformer Design Books


The Audio Note™ Transformer Design Philosophy | enjoythemusic.com/magazine/manufacture/0105
From Enjoy the Music.com, by By Andy Grove And Peter Qvortrup.

Audio Transformers | jensentransformers.com/an/Audio Transformers Chapter.pdf
By Bill Whitlock, from Jensen Transformers, Inc.

Audio Transformers | shure.com/support/technotes/app-transform.html
From Shure Incorporated.

Audio Transformers Magnetic Shielding | sescom.com/audio/transfor_mag_shield.html
From SESCOM, Inc.

Construction And Use of Broadband Transformers | oselectronics.com/downloads/Broadband Transformers.pdf
From Ocean State Electronics.

Current-Sense Transformer Application Design Guidelines | datatronics.com/pdf/current_sense_article.pdf
By Ariel General, Datatronic Distribution Inc.

Current Transformer Design and Theory | coilwinder.com/current_transformer_design_and_theory.htm
From Coil Winders.

Current Transformers: How to Specify Them | mt.schneider-electric.be/Main/CT/ct194UK.pdf
From Schneider Electric.

Current Transformers: Specification Errors and Solutions | mt.schneider-electric.be/Main/CT/ct195UK.pdf
From Schneider Electric.

Design Parameters for Low-Distortion and Power Transformers TT/PR Cores | epcos.com/inf/80/ds/e0000005.pdf
Siemens Matsushita Components.

Dimming Dual Lamp Parallel Configuration with Balance Transformer | irf.com/technical-info/appnotes/an-1039.pdf
Application note from International Rectifier Corp, by T. Ribarich, R. Marenche.

Electrical Power Transformer & Inductor Design | smps.us/magnetics.html
A guide to power transformers and inductors. Theory, free design software, calculators, tutorials, guides, online handbook and other resources.

Electronic Transformer Applications | irf.com/technical-info/appnotes/an-1069.pdf
Application note from International Rectifier Corp, by Peter Green.

Everything You Wanted to Know About Wideband, Low-Frequency Transformers | edn.com/article/CA54575.html?1=1
From EDN, by Richard Kurzrok.

Field Adjustment of Current Transformer Ratio | crmagnetics.com/pdf/ancrct-1.pdf
Application sheet from CR Magnetics, Inc.

Finding and Fixing Hum | psaudio.com/ps/how-to/finding-and-fixing-hum
From PS Audio.

Flyback Transformer Design for MAX1856 SLIC Power Supplies | maxim-ic.com/appnotes.cfm/appnote_number/1166
Application note from Maxim Integrated Products.

Flyback Transformer Design for the IRIS40xx Series | irf.com/technical-info/appnotes/an-1024.pdf
Application note from International Rectifier Corp.

How RF Transformers Work | minicircuits.com/pages/pdfs/howxfmerwork.pdf
Application note from Mini-Circuits.

How to Calculate Transformer Related Noise Figure | jensen-transformers.com/as/as040.pdf
From Jensen Transformers, Inc.

How to Design a Transformer with Fractional Turns | focus.ti.com/lit/ml/slup200/slup200.pdf
By Lloyd H. Dixon, Jr.

How do we Design a Rectifier Safety Transformer for Feed to Voltage Controllers of 5Vdc,1Adc and 2x12Vdc,0.1Adc With RC-Load in Accordance With IEC 61558? | rale.ch/aspnet_client/Examles/CAL0005e/CAL0005E.pdf
From Rale Engineering.

How Should One Design a Low Inrush Current Universal Control Transformer For 800VA Continuous Output Power as Per IEC 61558? | rale.ch/aspnet_client/Examles/CAL0007e/CAL0007E.html
From Rale Engineering.

How Transformers, Chokes and Inductors Work, and Properties of Magnetics | coilws.com/magneticandhow.html
From Coilws.com, Inc.

Ideal Transformers Aid in Balanced-Line Analysis | edn.com/article/CA63744.html?1=1
From EDN, by Alan Victor.

Inductor & Flyback Transformer Design | focus.ti.com/lit/ml/slup127/slup127.pdf
From Texas Instruments Incorporated.

Inside Transformers | du.edu/~jcalvert/tech/transfor.htm
How a transformer works, and how to design them. Dissection of a transformer, University of Denver.

Isolation Transformer Passes Millihertz Signals | edn.com/archives/1994/080494/16di3.htm
From EDN, by George Kassabian.

Midcom's Tips for Transformer Modeling | midcom-inc.com/Tech/pdf/tn82.pdf
From Midcom, Inc., by Dave LeVasseur.

Model a Nonideal Transformer in Spice | edn.com/article/CA46932.html?1=1
From EDN, by Vittorio Ricchiuti.

Optimization of a Flyback Transformer Winding Considering Two-Dimensional Field Effects, Cost And Loss | thayer.dartmouth.edu/other/inductor/papers/sfdcl.pdf
From Dartmouth College, by Charles R. Sullivan and Tarek Abdallah.

Output Transformer Design and Winding | geofex.com/Article_Folders/xformer_des/xformer.htm
By R.G. Keen.

Parasitic Capacitance Effects in Step-up Transformer Design | linear.com/pc/downloadDocument.do?navId=H0,C1,C1003,C1042,C1031,C1061,P1266,D4131
From Linear Technology.

Power Transformer Design | focus.ti.com/lit/ml/slup126/slup126.pdf
From Texas Instruments Incorporated.

Power Transformer Specification Formulae | premmagnetics.com/powerspec.html
From Prem Magnetics, Inc.

Project Thor Design Guidelines | elisanet.fi/dncmrc/thorguid.htm
Within this project a Tesla resonance transformer is analyzed, designed and built for study and research.

Pulse Transformers | rhombus-ind.com/app-note/circuit.pdf
Application note from Rhombus Industries Inc.

RF Balun Transformers | macom.com/Application Notes/pdf/m565.pdf
Application note from M/A-COM.

RF Transformers | minicircuits.com/pages/pdfs/tran14-2.pdf
Application note from Mini-Circuits.

Soft Magnetic Materials for Audio Transformers: History, Production, and Applications | sowter.co.uk/pdf/GAVS.pdf
By G.A.V. Sowter.

Suppression of Powerline Noise with Isolation Transformers | blackmagic.com/ses/bruceg/EMC/isolatrans.html
By Bruce C. Gabrielson and Mark J. Reimold.

TOPSwitch® Flyback Transformer Construction Guide | powerint.com/PDFFiles/an18.pdf
Application note from Power Integrations, Inc.

Transformer Design Consideration for off-line Flyback Converters using Fairchild Power Switch (FPSTM) | fairchildsemi.com/an/AN/AN-4140.pdf
Application note from Fairchild Semiconductor Corporation.

Transformer Design Philosophies | lundahl.se/pdfs/papers/design_philosophies.pdf
From Lundahl Transformers.

Transformer Designs Keep Pace With DC/DC Converter Technology | electronicproducts.com/ShowPage.asp?SECTION=3700&PRIMID=&FileName=CANDD.apr2004.HTML
From Electronic Products, by Rob Hill.

Transformer Facts | toroid.com/custom_transformers/technical_bulletin_1.htm
Application Notes on Rectifier Transformers from Toroid Corporation of Maryland.

Transformer Impedance Measurements | ridleyengineering.com/imped.htm
From Ridley Engineering, Inc.

Transformer Measurements | home.earthlink.net/~jimlux/hv/xfmrmeas.htm
By Jim Lux.

Transformer Polarization | rhombus-ind.com/app-note/degauss.pdf
Application note from Rhombus Industries Inc.

Winding Arrangements of Output Transformers | lundahl.se/pdfs/papers/outp_typ.pdf
From Lundahl Transformers.

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