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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
From Enjoy the Music.com, by By Andy Grove And Peter Qvortrup.

Audio Transformers
By Bill Whitlock, from Jensen Transformers, Inc.

Audio Transformers
From Shure Incorporated.

Audio Transformers Magnetic Shielding
From SESCOM, Inc.

Construction And Use of Broadband Transformers
From Ocean State Electronics.

Current-Sense Transformer Application Design Guidelines
By Ariel General, Datatronic Distribution Inc.

Current Transformer Design and Theory
From Coil Winders.

Current Transformers: How to Specify Them
From Schneider Electric.

Current Transformers: Specification Errors and Solutions
From Schneider Electric.

Custom and Standard Toroidal Transformer Design Capabilities
From Toroid Corporation of Maryland.

Design Parameters for Low-Distortion and Power Transformers TT/PR Cores
Siemens Matsushita Components.

Dimming Dual Lamp Parallel Configuration with Balance Transformer
Application note from International Rectifier Corp, by T. Ribarich, R. Marenche.

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

Electronic Transformer Applications
Application note from International Rectifier Corp, by Peter Green.

Everything You Wanted to Know About Wideband, Low-Frequency Transformers
From EDN, by Richard Kurzrok.

Field Adjustment of Current Transformer Ratio
Application sheet from CR Magnetics, Inc.

Finding and Fixing Hum
From PS Audio.

Flyback Transformer Design for MAX1856 SLIC Power Supplies
Application note from Maxim Integrated Products.

Flyback Transformer Design for the IRIS40xx Series
Application note from International Rectifier Corp.

How RF Transformers Work
Application note from Mini-Circuits.

How to Calculate Transformer Related Noise Figure
From Jensen Transformers, Inc.

How to Design a Transformer with Fractional Turns
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?
From Rale Engineering.

How Should One Design a Low Inrush Current Universal Control Transformer For 800VA Continuous Output Power as Per IEC 61558?
From Rale Engineering.

How Transformers, Chokes and Inductors Work, and Properties of Magnetics
From Coilws.com, Inc.

Ideal Transformers Aid in Balanced-Line Analysis
From EDN, by Alan Victor.

Implementing Flyback Transformer Design for Continuous Mode
From Power Electronics Technology, by Keith Billings.
Inductor & Flyback Transformer Design
From Texas Instruments Incorporated.

Inside Transformers
How a transformer works, and how to design them. Dissection of a transformer, University of Denver.

Isolation Transformer Passes Millihertz Signals
From EDN, by George Kassabian.

Midcom's Tips for Transformer Modeling
From Midcom, Inc., by Dave LeVasseur.

Model a Nonideal Transformer in Spice
From EDN, by Vittorio Ricchiuti.

Optimization of a Flyback Transformer Winding Considering Two-Dimensional Field Effects,
Cost And Loss

From Dartmouth College, by Charles R. Sullivan and Tarek Abdallah.

Output Transformer Design and Winding
By R.G. Keen.

Parasitic Capacitance Effects in Step-up Transformer Design
From Linear Technology.

Power Transformer Design
From Texas Instruments Incorporated.

Power Transformer Specification Formulae
From Prem Magnetics, Inc.

Project Thor Design Guidelines
Within this project a Tesla resonance transformer is analyzed, designed and built for study and research.

Pulse Transformers
Application note from Rhombus Industries Inc.

Reverse As-Built Transformer Design Method
From International Journal of Electrical Engineering Education, by Bodger, P S, Liew, M C.

RF Balun Transformers
Application note from M/A-COM.

RF Transformers
Application note from Mini-Circuits.

Soft Magnetic Materials for Audio Transformers: History, Production, and Applications
By G.A.V. Sowter.

Suppression of Powerline Noise with Isolation Transformers
By Bruce C. Gabrielson and Mark J. Reimold.

TOPSwitch® Flyback Transformer Construction Guide
Application note from Power Integrations, Inc.

Transformer Design
From Introduction to Power Electronics, University of Colorado at Boulder.

Transformer Design Consideration for off-line Flyback Converters using Fairchild Power Switch (FPSTM)
Application note from Fairchild Semiconductor Corporation.

Transformer Design Philosophies
From Lundahl Transformers.

Transformer Designs Keep Pace With DC/DC Converter Technology
From Electronic Products, by Rob Hill.

Transformer Facts
Application Notes on Rectifier Transformers from Toroid Corporation of Maryland.

Transformer Impedance Measurements
From Ridley Engineering, Inc.

Transformer Measurements
By Jim Lux.

Transformer Polarization
Application note from Rhombus Industries Inc.

Transformer Specifications
From the University of Kentucky.

Winding Arrangements of Output Transformers
From Lundahl Transformers.

RF Cafe Software

RF Cascade Workbook
RF Cascade Workbook is a very extensive system cascaded component Excel workbook that includes the standard Gain, NF, IP2, IP3, Psat calculations, input & output VSWR, noise BW, min/max tolerance, DC power cauculations, graphing of all RF parameters, and has a graphical block diagram tool. An extensive User's Guide is also included. - Only $35.
RF system analysis including
frequency conversion & filters

Smith Chart™ for Excel
Smith Chart™ for Visio
RF & EE Symbols Word
RF Stencils for Visio

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