B B1 MAGNETIC MATERIAL + CORES MAGNETIC MATERIAL B1.3 FERROCART | OVERVIEW FERROCART (IRON POWDER) Our FERROCART material grades are manufactured by pressing; they consist of a blend of magnetically soft metal powder and isolating binder. Through fine grain dispersion, eddy currents are largely suppressed. Different FERROCART types, which are suitable for application at low frequency ranges, up to approximately 100 MHz, can be manufactured by mixture of metal powder types and isolation portions. We can fully take advantage of the metallic Magnetika, which is the high magnetization, with this material, for instance in component parts used for power electronics. Furthermore fine grain dispersion implicates internal demagnetization with the result of an extremely good stabilization. Air gaps, which have to be mostly used in strip band cores or laminated steel cores, are no more necessary. By using FERROCART material grades, it ensues in many cases, like loading coil - and noise suppression choke applications, very cheap inductive component parts. Remark The data of our different material grades as shown on the following tables, were measured on toroidal test cores. As is well known there is no direct relation between material characteristics as measured on test pieces and the corresponding parameters of other cores, made of the same material, but different in shape and size, especially if cores are applied outside those ranges (e.g. of frequency, induction, or temperature), within which the catalogue material properties have been ascertained. No guarantee can be given that specifications as laid down in this catalogue may not be changed before the next edition is given to press. Obligatory assurances of properties require separate agreements in writing in order to become efficacious. For these reasons, if new components are to be designed, we ask our customers for due contact in order to agree on suitable specifications. This can be done either by fixing measuring conditions and quantities or by exchanging standard cores or components. General technical characteristics Density ≈ 5 . . . 7,4 g·cm-3 DC Resistivity ≈ 5 Ω·m E-Modul ≈ 30 . . . 70 kN·mm-3 Expansion Coefficient ≈ 10 . . . 25 10-6·K-1 Thermal Conductivity ≈ 10 W·m-1·K-1 177 B B1 MAGNETIC MATERIAL + CORES MAGNETIC MATERIAL B1.3 FERROCART NEW MATERIAL Fe 897: Iron powder with high amplitude permeability 500 Fe 897 Fe 893 450 400 350 300 µa 250 200 150 100 50 f = 1 kHz 0 100 1000 Hs / A/m TASK: Development of a µa optimized iron powder material for AC applications Result: Fe897 with a amplidude permability of 420 with low power losses 178 10000 B B1 MAGNETIC MATERIAL + CORES MAGNETIC MATERIAL B1.3 FERROCART | SUMMARY Application High Q circuits (Coils with high thermal and Frequency range Magnetic load Powder materials Core shape MHz FERROCART ≤ 10 Fe 818 Rod, tube, ≤ 100 Fe 810 screw, nipple temporal stability insensible of and cup cores external magnetic fields) All powder materials have a high Anti-interference and ≤ 10 damping coils saturation Fe 876 magnetization Fe 850 multi-aperture, E-, and are there- Fe 818 and pot cores, toroids fore usable Fe 810 Power applications at extremely Fe 897 (Inductors and transformers high magnetic Fe 896 with high thermal and temporal load. Fe 893 stability, for high AC amplitudes or high premagnetization, e.g. Rod, tube, Fe 892 Fe 876 ≤ 0,2 loading coils, noise Fe 875 suppression coils) Fe 850 Toroids Fe 835 Fe 818 Toroids for thyristor noise Fe 896 suppression chokes for Fe 892 dimmers. 179 Toroids B B1 MAGNETIC MATERIAL + CORES MAGNETIC MATERIAL B1.3 FERROCART | SUMMARY FERROCART Initial permeability Relative loss factor frequency Rel. temperature factor 25°C - 70°C Fe 897 µi Rel. temperature factor 140 110 100 75 ± 15% ± 15% ± 15% ± 15% 1600 120 1600 0,16 0,01 0,16 0,01 0,16 100 < 18 < 18 <5 °C 200 200 200 200 180 Toroids Toroids Toroids Toroids Toroids Fe 875 Fe 850 Fe 835 Fe 818 f 1) 75 55 35 ± 15% ± 15% ± 15% 1 MHz αF 0,01 1400 < 10 tanδ -6 µi 10 0,16 190 < 18 µi 0,01 1200 10-6 K Maximum operating temperature 1) 125 αF 25°C - 70°C preferred shapes Fe 876 MHz FERROCART frequency Fe 892 f preferred shapes Relative loss factor Fe 893 ± 15% 1 tanδ -6 µi 10 Maximum operating temperature ¹ Initial permeability Fe 896 0,01 0,16 Fe 810 18 10 ± 10% ± 10% 120 1300 140 800 100 180 110 200 500 2000 0,01 0,16 0,02 0,3 0,05 0,5 0,05 0,5 12 100 -6 10 K < 18 < 15 < 12 < 12 <2 °C 180 180 150 150 120 Toroids Toroids Toroids the maximum operating temperature of coated cores depends on the temperature behaviour of the coating material. 180 Toroid, rod, tube, screw cores