Low Br and Linear Magnetization Characteristics Nanocrystalline Cores

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Low Br and Linear Magnetization Characteristics Nanocrystalline Cores

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For IGBT inverter electric welder and pulsating DC fault current voltage independent RCCBS which low Br is needed to get high÷B(Bs-Br),the nanocrystalline cores are made with transverse-field-annealing processes.

(1).Comparision of nanocrystalline cores with other soft magnetic cores.

Properties	Nanocrystalline core	Ferrite core
Saturate induction(T)	1.25	0.5
Remanace(T)	0.15	0.2
Permeability(Gs/Oe)	20000	2000
CoercivityHc(Oe)	0.005	0.2
Curie temperature(℃)	570	<200
Core loss(20kHz,0.2T)(w/kg)	≤4	7.5
Core loss(20kHz,0.5T)(w/kg)	≤40	---
Core loss(50kHz,0.3T)(w/kg)	≤60	---

(2).Typical characteristic curves