Affiliations: [a] College of Engineering, Hosei University, 3-7-2
Kajinocho, Koganei, Tokyo 185-8584, Japan
Correspondence:
[*]
Corresponding author: Tomokazu Naruta, College of Engineering,
Hosei University, 3-7-2 Kajinocho, Koganei, Tokyo, Japan. Tel.: +81 423 87
6220; Fax: +81 423 87 6220; E-mail: naruta@ysaitoh.k.hosei.ac.jp
Abstract: In order to design an optimal planar inductor, this paper carries
out several axisymmetrical magnetic field simulations fully taking the magnetic
hysteretic properties of ferromagnetic core materials as well as open boundary
condition into account. Finite element method is applied to evaluating the
magnetic fields, reactive and dissipative energies in a planar inductor.
Because of the nature of magnetic fields, it is essentially taken into account
the open boundary effects to evaluate the exact characteristics of planar
inductor. Since the finite elements is one of the methodologies to solving for
the partial differential equations, and then it has been difficult to take the
open boundary effects into account. However, this paper removes this difficulty
by employing the strategic dual image (SDI, in short) method [1,2]. Another
difficulty is caused by the hysteretic magnetization characteristics of
magnetic core materials. Applying the Chua type magnetization model to
represent the hysteretic property also removes this difficulty. As a result, it
is revealed that the frequency characteristic of core magnetic materials as
well as shape dominate major characteristics of the magnetic fields, reactive
and dissipative energies in the inductors.
