Reducing core losses in amorphous Fe{sub 80}B{sub 12}Si{sub 8} ribbons by laser-induced domain refinement

Journal Article · Wed Sep 01 04:00:00 EDT 1999 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers)

DOI:https://doi.org/10.1109/20.800690· OSTI ID:20000823

Johnson, M J; Chen, R; Jiles, D C; Ramanan, V R

In the United States alone, power conversion inefficiencies are responsible for huge amounts of wasted energy every year. Most of this inefficiency is due to resistive losses, however iron losses (hysteresis and anomalous, or excess eddy current) are also significant. Werner and Jaffe calculated that core losses in electric motors alone accounted for 45 x 10{sup 9} kW.hr. Even small fractional improvements in efficiency can lead to substantial savings. Here, in transformer cores amorphous metallic ribbons are competitive substitutes for silicon-iron laminates due to their low values of core loss. Research has been conducted to further improve performance by using techniques that can reduce core losses in the metallic ribbons. One way of reducing core loss is to anneal the samples in a magnetic field. However, further reductions in core loss are possible by scribing the surface of the ribbons using a laser beam. The scribing pattern can lead to a refined domain structure and reduced excess loss. It has been found that under suitable processing conditions, core loss can be further reduced by as much as 20% by laser scribing.

• Research Organization: Ames Lab., IA (US)
• Sponsoring Organization: US Department of Energy; National Science Foundation
• OSTI ID: 20000823
• Journal Information: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers), Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers) Journal Issue: 5Pt2 Vol. 35; ISSN IEMGAQ; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
36 MATERIALS SCIENCE
AMORPHOUS STATE
BORON ALLOYS
DOMAIN STRUCTURE
ENERGY EFFICIENCY
ENERGY LOSSES
IRON BASE ALLOYS
PERFORMANCE
SILICON ALLOYS
TRANSFORMERS