Title :
High-frequency small-signal model of ferrite core inductors
Author :
Kazimierczuk, Marian K. ; Sancineto, Giuseppe ; Grandi, Gabriele ; Reggiani, Ugo ; Massarini, Antonio
Author_Institution :
Dept. of Electr. Eng., Wright State Univ., Dayton, OH, USA
fDate :
9/1/1999 12:00:00 AM
Abstract :
A circuit model of ferrite core inductors is presented. The behavior of the model parameters versus frequency is considered. The total power loss in inductors consisting of the winding resistance loss and the core loss, is modeled by a frequency-dependent equivalent series resistance. The total inductance given by the sum of the main inductance and the leakage inductance is obtained as a function of frequency. In order to study the core equivalent resistance and main inductance versus frequency, the magnetic field distribution in the core is derived from Maxwell´s equations for a long solenoid. The complex permeability and permittivity of the ferrite core are introduced in the electromagnetic field equations. Experimental results are also given
Keywords :
Maxwell equations; coils; eddy current losses; electric resistance; equivalent circuits; ferrite devices; frequency response; inductance; inductors; losses; magnetic cores; magnetic fields; magnetic leakage; modelling; skin effect; HF small-signal model; Maxwell equations; complex permeability; complex permittivity; core equivalent resistance; core loss; electromagnetic field equations; ferrite core inductors; frequency-dependent equivalent series resistance; high-frequency model; leakage inductance; magnetic field distribution; model parameters; total inductance; total power loss; winding resistance loss; Circuits; Core loss; Ferrites; Frequency; Inductance; Inductors; Magnetic cores; Magnetic fields; Maxwell equations; Solenoids;
Journal_Title :
Magnetics, IEEE Transactions on
