Nonoriented electrical steel sheet with low iron loss for high-efficiency motor cores

Author

Takashima, Minoru ; Morito, Nobuyuki ; Honda, Atsuhito ; Maeda, Chizuko

Author_Institution

Dept. of Mater. Sci. & Eng., Carnegie Mellon Univ., Pittsburgh, PA, USA

Volume

35

Issue

1

fYear

1999

fDate

1/1/1999 12:00:00 AM

Firstpage

557

Lastpage

561

Abstract

A new material was studied for high-efficiency motor cores that need higher magnetic flux density, lower iron loss, and lower mechanical hardness. Excessively high Si content tends to decrease magnetic flux density of nonoriented electrical steel sheets. The composite addition of rare-earth metals (REM) and Al into molten steel was found to make inclusions coarse and remarkably improve grain growth during stress relief annealing, which resulted in decreased iron loss. A new nonoriented electrical steel sheet (50RMA350) with Si, Al, and REM has been successfully developed to give a higher efficiency to inverter drive model motors than a conventional material

Keywords

alloy steel; annealing; hardness; inclusions; losses; magnetic cores; magnetic flux; small electric machines; grain growth; high-efficiency motor cores; inclusions; inverter drive model; iron loss; magnetic flux density; mechanical hardness; nonoriented electrical steel sheet; stress relief annealing; Annealing; Building materials; Inverters; Iron; Magnetic cores; Magnetic flux density; Magnetic materials; Sheet materials; Steel; Stress;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.737481

Filename

737481