Advances in big-size fast-pulsed amorphous cores research

This paper describes the research progress of manufacturing technology for amorphous cores, including layer insulation, magnetic field annealing and encapsulation technology. The results show as follows: (1) for the amorphous ribbon surface is coated with 0.6~1.0 μm thick SiO2 insulation, the breakdown voltage is no less than 120 V DC between ribbon layers; (2) through magnetic field annealing, the remanence ratio is larger than 0.90 or less than 0.20 for longitudinal or latitudinal field, respectively, and the amorphous core magnetic property varies within 5% after encapsulation. Through experiments on big amorphous cores with layer insulation under fast-pulsed condition, the pulsed permeability and flux swing were obtained. The flux swing of the Fe-based amorphous core of 1 0