Iron loss estimation of soft magnetic materials for power transformers considering hysteretic properties

Abstract

This paper investigates an efficient iron loss calculation method for soft magnetic materials of power transformers. To accurately estimate iron losses in the materials such as structural steels and magnetic shielding, the magnetic field analysis taking account of the nonlinear magnetic properties is considered to be effective. In this paper, quasi-DC magnetic properties of the soft magnetic materials are measured and the iron losses are calculated by using a three-dimensional finite element method. Furthermore, the effect of considering hysteretic properties on the accuracy of the iron loss calculation is discussed based on a theoretical representation of eddy current loss in a conductive rectangular plate.

Magnetic Material in Triboelectric Nanogenerators: A Review

“…Soft magnetic materials have very small residual magnetism and coercivity (less than 1000 A/m), and ferrite is the main soft magnetic material used in TENGs (Table 2). Soft magnetic materials have a wide range of applications in sensors [98,99], transformers [100], relays [101], and motors [102].…”

Comprehensive study on in‐plane eddy‐current loss in permanent‐magnet synchronous machines

“…Variables a, b, and c indicate the half of the width, half of the length and thickness of the iron core, respectively. When the skin depth is much smaller than a and b, and the magnetic flux flows parallel to the direction of length c, the eddy-current loss of the iron core per weight P ec is expressed [14] by the following equation:…”

“…Variables a , b , and c indicate the half of the width, half of the length and thickness of the iron core, respectively. When the skin depth is much smaller than a and b , and the magnetic flux flows parallel to the direction of length c , the eddy‐current loss of the iron core per weight P ec is expressed [14] by the following equation: $$${P}_{ec}=\sqrt{\frac{{\sigma }_{ir}}{\mu }}{(\pi f)}^{3/2}\frac{{{B}_{m}}^{2}}{D(1/a+1/b)}$$$ where D is the iron core density and B m is the maximum flux density.…”