Multiwinding transformers: a successive refinement method to characterize a general equivalent circuit

Author

Schellmanns, Ambroise ; Berrouche, Khoumissa ; Kéradec, Jean-Pierre

Author_Institution

Lab. d´´Electrotech. de Grenoble, CNRS, St. Martin d´´Heres, France

Volume

47

Issue

5

fYear

1998

fDate

10/1/1998 12:00:00 AM

Firstpage

1316

Lastpage

1321

Abstract

A lumped component equivalent circuit has been developed by our team to model the linear electrical behavior of any two winding transformer. Its topology is independent of size and technology and a general method of characterization, exclusively based on external impedance measurements, has been presented. Unfortunately, when some key frequencies are out of the range of the measuring apparatus, several capacitances remain unevaluated. Owing to a new understanding of magnetic and electrostatic coupling, a new successive step approach is presented. At each step, a more accurate circuit, proven to be effective in electronic simulation, is fully characterized. This method suits any number of windings and experimental data will be presented for two and three winding transformers

Keywords

Bode diagrams; electric impedance measurement; equivalent circuits; high-frequency transformers; lumped parameter networks; magnetic leakage; transformer cores; transformer magnetic circuits; transformer windings; HF measurement; asymptotic Bode plot; electronic simulation; electrostatic coupling; external impedance measurements; ferrite core; general equivalent circuit characterization; linear electrical behavior; lumped component equivalent circuit; magnetic coupling; magnetic leakage; multiwinding transformers; parasitic capacitor; successive refinement method; successive step approach; three winding transformers; transformer core; two winding transformer; Capacitance measurement; Circuit simulation; Circuit topology; Coupling circuits; Electrostatic measurements; Equivalent circuits; Frequency measurement; Impedance measurement; Magnetic devices; Transformer cores;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.746603

Filename

746603