Iron powder core, Iron powder cores, toroids, toroidal cores, magnetic winding core, iron powder toroidal core, powdered cores, ferrite toroidal core, alpha-core, microscopic toroidal core
WHAT IS, AND WHY USING IRON POWDER CORE?
Iron powder cores are commonly used in power conversion, line filter applications and radio frequency applications. Oftentimes, iron powder cores substitute ferrite cores. Ferrite cores have a high permeability so it needs an air gap to reduce this permeability. This air gap has the disadvantage of power loss, leading to the risk of a hot spot.
Iron powder cores do not need the additional air gap. The characteristics of iron powder cores reduce the power loss. Furthermore, the saturation flux density in ferrite cores is around 400 mT and decreases with temperature. Iron powder cores have the saturation flux densities of more than 1T.
IRON POWDER COREs
Iron powder cores may come in numerous sizes and configurations, each of which is available in different materials. However, the toroidal cores are the most efficient configuration due to its highly shelf-shielding characteristic. Iron powder toroidal core is seldom necessary to shield a toroidal inductor as most of the flux lines are contained within the core.
Features of toroidal cores
The maximum operating temperature of toroidal cores is 150℃.
The toroidal cores are coated with epoxy resin with minimum 500V AC breakdown.
The toroidal shape provides good magnetic flux coupling and low stray flux leakage.
The toroidal shape is the height (also referred as “thickness”) is easy to vary and requires no tooling changes.
Application of toroidal cores
This toroids products offer a simple, compact solution for making inductors, coupled inductors and transformers. RF circuits, EC power supply chokes, motors dimmer control filters.
Various types of cores are designed as standard series as listed in the catalog. None standard cores may be designed and produced to meet customer’s specifications as requested. The next several pages are devoted to iron Powder materials and the toroidal core configuration in particular. You will find physical dimensions of available items, their AL values and other magnetic properties, as well as how to select the proper core for your application.
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