Title :
Ohmic losses calculation in SMPS transformers: numerical study of Dowell´s approach accuracy
Author :
Robert, Frederic ; Mathys, Pierre ; Schauwers, Jean-Pierre
Author_Institution :
Univ. Libre de Bruxelles, Belgium
fDate :
7/1/1998 12:00:00 AM
Abstract :
The paper compares two methods for ohmic losses calculation in switch-mode power supply transformers: Dowell´s 1D approach and 2D finite element method simulations (validated by measurements). Dowell´s method underestimates losses at the fundamental frequency for foil windings, whereas harmonic losses are generally overestimated (depending on conductor type). More significant differences are found with high leakage inductance transformers
Keywords :
finite element analysis; harmonics; inductance; magnetic leakage; switched mode power supplies; transformer windings; transformers; 2D finite element method; Dowell´s 1D approach; SMPS transformers; conductor type; foil windings; harmonic losses; high leakage inductance transformers; ohmic losses calculation; switch-mode power supply; Conductors; Electromagnetic fields; Finite element methods; Magnetic analysis; Magnetic fields; Power system harmonics; Power system simulation; Switched-mode power supply; Transformers; Wire;
Journal_Title :
Magnetics, IEEE Transactions on
