FeSiAl powder integrated pressed inductor and its production process

Abstract

The invention relates to a sendust powder integrated pressing inductor and a production process thereof and belongs to the technical field of the production of inductors. According to the sendust powder integrated suppression inductor and the production process thereof, a red copper band is used as a coil, the middle portion of the red copper band is wrapped in a sendust block, the exposed portions at both ends are bent downwards along the side of the sendust block and bent inwards at the bottom of the sendust block, and a cover sheet is connected with the upper surface of the sendust block through gelatinous materials. The production process includes the steps of forming a blank through pressing, sintering heat treatment, electro plating nickel and tin, cutting and bending, adhering cover sheet and obtaining sendust powder integrated pressing inductor. The sendust powder integrated pressing inductor and the production process thereof have the advantages of being less in iron loss and good in formability, saving space, reducing noise and having stable and reliable electromagnetic performance, and meanwhile improve the production efficiency and reduce the production costs.

Description

technical field [0001] The invention relates to a FeSiAl powder integrally pressed inductor and a production process thereof, belonging to the technical field of inductor production. Background technique [0002] With the development of computers, servers, telecommunication systems and other electronic products in the direction of miniaturization and low power consumption, the power supply is required to be high frequency, low voltage and high current. Power choke coils and filters are important inductive devices in power switching circuits, which should be able to carry high frequency and high current requirements. At present, choke coils and filters generally use surface mount inductors made of ferrite soft magnetic materials. Although the ferrite soft magnetic material has low power consumption, it is easy to saturate when passing a large current due to its low saturation magnetic flux density (Bs). Gapping the ferrite core magnetic circuit to prevent saturation has the...

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Problems solved by technology

Although the pressing method of this technical solution is suitable for automatic operation and can improve production efficiency, in the process, only the powder of the metal magnetic powder core is subjected to insulation and plastic treatment, that is, it is bonded and solidified with glue, and does not form crystallization. This solidified magnetic core, It is limited to the shortcomings of the glue-bonded and cured iron powder core itself, the iron loss is too high, the temperature characteristics are poor, about 20 times that of ferrite materials, and the magnetic permeability is low, usually below 35H / m, resulting in the production of power generation Poor temperature sensing characteristics, unstable electromagnetic performance, limited application range

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