Ferromagnetic amorphous metallic alloy and annealing method

C - Chemistry – Metallurgy – 21 – D

Patent

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C21D 8/12 (2006.01) C21D 1/04 (2006.01) H01F 1/153 (2006.01) H01F 41/02 (2006.01) C21D 6/00 (2006.01)

Patent

CA 2279981

A ferromagnetic amorphous metallic alloy strip is annealed to minimize exciting power rather than core loss. The strip has an exciting power less than 0.5 VA/kg when measured at 60 Hz and an operating induction of 1.40 to 1.45 Tesla, the measurement being carried out at ambient temperature. Cores composed of the strip can be run at higher operating induction than those annealed to minimize core loss. The physical size of the transformer's magnetic components, including the core, is significantly reduced.

La présente invention a trait à une bande d'alliage métallique ferromagnétique amorphe soumise à un recuit dans le but de réduire au minimum l'énergie d'excitation empêchant la perte dans le noyau. Mesurée à 60 Hz, la bande possède une énergie d'excitation inférieure à 0,5 VA/kg et une induction de fonctionnement de 1,40 à 1,45 Tesla, la mesure étant prise à température ambiante. Les noyaux composés de la bande peuvent être exploités à une induction de fonctionnement supérieure à celle des noyaux soumis à un recuit pour réduire au minimum la perte dans le noyau. La taille physique des composants magnétiques du transformateur, y compris le noyau, est réduite de manière significative.

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