A Method for Defining the Mean Path Length of the Epstein Frame

Author

Marketos, Philip ; Zurek, Stan ; Moses, Anthony J.

Author_Institution

Sch. of Eng., Cardiff Univ.

Volume

43

Issue

6

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

2755

Lastpage

2757

Abstract

This paper presents a method for the determination of the mean path length of the 25 cm Epstein frame. The proposed method employs two Epstein frames of different dimensions. A standard 25 cm and a revised 17.5 cm Epstein frame were built. The corner areas of the two frames were kept identical. By subtracting the absolute power loss (in watts) measured in strips of the same material by means of the two frames and combining it with the difference in size of the two frames, the exact mean path length of the Epstein frame can be accurately obtained for any magnetizing condition including the case of controlled distorted (nonsinusoidal) magnetization. Results indicate that material permeability and anisotropy are the most important factors that affect the mean path length, whereas the peak flux density and magnetizing frequency also play an important role

Keywords

carrier mean free path; length measurement; magnetic anisotropy; magnetic flux; magnetic permeability; steel; 17.5 cm; 25 cm; Epstein frame; distorted magnetization; electrical steel; flux density; magnetic anisotropy; material permeability; mean path length; Distortion measurement; Length measurement; Loss measurement; Magnetic anisotropy; Magnetic flux; Magnetic materials; Perpendicular magnetic anisotropy; Power measurement; Size measurement; Strips; Electrical steel; Epstein frame; mean path length; power loss;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2007.894124

Filename

4202837