Ferrite Cores powder core magnetic core

Permeability(µ)AL(nH/T2)6080+8% Dimensions (mm) Uncoated=39.9 nom*24.1 nom*14.5 nom Coated=40.77 max*23.31 min*15.37 max Introduction Magnetics Molypermalloy Powder (MPP) cores are distributed air gap toroidal cores made from a 79% nickel, 17% iron, and 4% molybdenum alloy powder for the lowest core losses of any powder core material. MPP cores possess many outstanding magnetic characteristics, such as high resistivity, low hysteresis and eddy current losses, excellent inductance stability after high DC magnetization or under high DC bias conditions and minimal inductance shift up to 2,000 gausses under AC conditions. ---------------------- Magnetics High Flux powder cores are distributed air gap toroidal cores made from a 50% nickel - 50% iron alloy powder for the highest available biasing capability of any powder core material. High Flux cores have certain advantages that make them quite useful for applications involving high power, high DC bias, or high AC bias at high power frequencies. High Flux cores have a saturation flux density of 15,000 gauss, as compared to 7,500 gauss for standard MPP cores or 4,500 gauss for ferrites. The core loss of High Flux powder cores is significantly lower than that of powdered iron cores. It is possible that High Flux cores will offer a reduction in core size over powdered iron cores in most applications. ---------------------- Magnetics Kool Mu powder cores are distributed air gap cores made from a ferrous alloy powder for low losses at elevated frequencies. The near zero magnetostriction alloy makes Kool Mu ideal for eliminating audible frequency noise in filter inductors. In high frequency applications, core losses of powdered iron, for instance, can be a major factor in contributing to undesirable temperature rises. Hence, Kool Mu cores are ideal because their losses are significantly less, resulting in lower temperature rises. It is possible that Kool Mu cores will offer a reduction in core size over powdered iron cores in a similar application. Extremely large Kool Mu toroids and racetrack cores are offered in sizes >101.6 mm (4.00 inches). These large shapes are ideal for high current inductors. MPP and High Flux versions are also available. Applications Magnetics powder cores are primarily used in power inductor applications, specifically in switch-mode power supply (SMPS) output filters, also known as DC Inductors. Other power applications include differential inductors, boost inductors, buck inductors, and flyback transformers. While all four materials are used in these applications, each has its own advantage. For the lowest loss inductor, MPP material should be used since it has the lowest core loss. For the smallest core size in a dc bias dominated design, High Flux material should be used since it has the highest flux capacity. For reasonably low losses and reasonably high saturation at a low cost, Kool Mu should be used since it has the lowest material costs. Other specialty applications, such as High Q low level filters, load coils, and temperature stabilized inductors can use MPP material.