Recent progress in Fe-based amorphous and nano-crystalline alloys for use in motor cores

摘要

One of the most effective methods to reduce core loss in motor cores is to use superior soft magnetic materials. Non-oriented electrical steel (NO) is generally used for motor cores and core loss is reduced by decreasing its thickness to suppress eddy current loss. The thickness of currently commercial NOs ranges from 0.35 mm to 0.15 mm. However, from the standpoint of core loss reduction, it is much more effective to change core material from NO to Fe-based amorphous (Fe-based AM) or Fe-based nano-crystalline alloys (Fe-based NANO).