Title :
Multiwinding transformers: a successive refinement method to characterize a general equivalent circuit
Author :
Schellmanns, A. ; Berrouche, K. ; Kéradec, J.P.
Author_Institution :
Lab. d´´Electrotech. de Grenoble, CNRS, St. Martin d´´Heres, France
Abstract :
A lumped component equivalent circuit has been developed by our team to model the linear electrical behaviour of any two winding transformer. Its topology is independent of sizes and technology and a general method of characterization, based exclusively on external impedance measurements, has been presented. Unfortunately, when some key frequencies are out of the range of the measuring apparatus, many of its components remain unevaluated. Owing to a new understanding of magnetic and electrostatic coupling, a several step approach is presented. At each step a more accurate circuit proven to be effective in electronic simulation, is fully characterized. This method suits whatever the number of windings and experimental data will be presented for two and three winding transformers
Keywords :
Bode diagrams; equivalent circuits; lumped parameter networks; transformer magnetic circuits; transformer windings; two-port networks; Bode diagram; electrostatic coupling; external impedance measurements; general equivalent circuit; linear electrical behaviour; lumped component equivalent circuit; magnetic coupling; multiwinding transformers; successive refinement method; three winding transformers; two port circuit; two winding transformer; Circuit simulation; Circuit topology; Coupling circuits; Electrostatic measurements; Equivalent circuits; Frequency measurement; Impedance measurement; Magnetic devices; Magnetic resonance; Transformers;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1998. IMTC/98. Conference Proceedings. IEEE
Conference_Location :
St. Paul, MN
Print_ISBN :
0-7803-4797-8
DOI :
10.1109/IMTC.1998.676819
