Local adaptive insulation in amorphous powder cores with low core loss and high DC bias via ultrasonic rheomolding.

ABSTRACT: Amorphous powder cores are promising components for next-generation power electronics. However, they present inherent challenges of internal air gaps and stresses during cold compaction, which significantly deteriorate soft magnetic properties. Here, we report the formation of a local adaptive insulation structure of biconcave lens in amorphous powder cores by ultrasonic rheomolding. Consequently, compared with conventional cold-compacted powder cores, the ultrasonic rheomolded powder cores offer significant simultaneous improvements in the permeability from 31.3-32.4 to 41.8-43.3 and the direct-current bias performance from 69.4-69.7% to 87.4-87.8% (7960 A/m), thereby overcoming the trade-off between permeability and direct-current bias performance. In particular, their core losses are as

SUBMITTER: Li HZ 

PROVIDER: S-EPMC11535067 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature