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Soft Magnetic Powder

The soft magnetic powder core can be processed into various forms. Measurements indicate that the powder core exhibits a different performance profile to magnetic steel laminations and ferrites employed in many applications over many years. The isolated individual particles contribute to the electrical resistivity of the material. The magnetic core material is composed chiefly of iron.

Soft Magnetic Powder Description

Soft magnetic materials can be readily magnetised and demagnetised. This occurs because only a small amount of energy is required. These materials exhibit a coercive field lower than 1 000A/m. Domain growth within these materials is easily initiated. They are principally used to increase magnetic flux or to provide a path for current‐generated flux. The key parameters for evaluating soft magnetic materials are permeability, coercive field strength, electrical conductivity and saturation magnetisation.

The soft magnetic powder core is a type of soft magnetic material. It is produced via powder metallurgy from insulated magnetic powder. These cores demonstrate measurable magnetic properties at high frequencies and can be manufactured by net shaping into various geometries.

Applications of Soft Magnetic Powder

The soft magnetic powder core can be formed into different shapes. It presents advantages compared to magnetic steel laminations and ferrites used in many applications. The individual insulated particles within the soft magnetic powder core result in high electrical resistivity, while the core material contains a significant proportion of iron. The combination of high resistivity and elevated iron content leads to increased electromagnetic conversion efficiency and magnetic flux density. Consequently, soft magnetic powder cores are applied in a growing number of fields. The demand for reduced-size devices with high performance is increasing, thereby requiring magnetic core materials suited to specific applications and operating environments.

Application in a common-rail system for diesel fuel injection valves

Application in ignition coils for petrol engines

Application in choke coils of DC–DC converters for hybrid vehicles

Products

HF-w/HF-g Powder

MPP-w/MPP-g Powder

FeSi-w/FeSi-g Powder

FeSiCr-w Powder

Amorphous Powder

FeSiNi-g Powder

Reference

Tomoyuki UENO, Hijiri TSURUTA, Tatsuya SAITO, Asako WATANABE, Tomoyuki ISHIMINE and Koji YAMADA: Practical and potential applications of soft magnetic powder cores with measured magnetic properties. https://global-sei.com/technology/tr/bn82/pdf/82-02.pdf

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Soft Magnetic Powder

Soft Magnetic Powder Description

Applications of Soft Magnetic Powder

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