Transformer core material, specific classification, what are the materials?
The iron core used in the iron powder core is composed of carbon based iron magnetic powder and resin carbon based iron magnetic powder. Prices are lowest in the core. The saturation magnetic induction intensity is about 1.4T; the permeability range is from 22~100; the initial permeability I varies with the frequency; the stability is good; the DC current superposition performance is good; but the high frequency loss is high. Variation of initial permeability of iron powder with DC magnetic field strength. Variation of initial permeability of iron powder with frequency
Iron silicon aluminum powder core (Kool, M, Cores)The iron silicon aluminum powder core is composed of 9%Al, 5%Si and 85%Fe powder. The main is to replace the iron core loss, 80% lower than the iron core, can be used at frequencies above 8kHz; saturation magnetic induction around 1.05T; permeability from 26 to 125; the magnetostrictive coefficient is close to 0, no noise generated at different frequencies; higher DC bias capability than MPP with performance; the best price ratio. It is mainly used in AC inductors, inductors, line filters, power factor correction circuits, etc.. It is sometimes used instead of air gap ferrite as transformer core.
Permalloy powder coreThe permalloy powder core mainly consists of molybdenum permalloy powder core (MPP) and high magnetic flux core (High, Flux). MPP is made up of 81%Ni, 2%Mo and Fe powder.The main features are: the saturation magnetization value of around 7500Gs; permeability range, from 14 to 550; with the lowest loss in the powder core; excellent temperature stability, widely used for space equipment, outdoor equipment etc.; magnetostriction coefficient is close to zero, no noise at different frequencies. High quality factor Q filter, mainly used in the following 300kHz induction coil, load resonant circuit, LC circuit, commonly used in high requirements on the temperature stability of the output inductor, power factor compensation circuit, commonly used in AC circuit, the most expensive powder core.
