Coating type inductor

Abstract

The invention discloses a coating type inductor which comprises a totally-closed magnet structure, a coil, a shielding layer, an upper insulating layer and an electrode, the totally-closed magnet structure comprises a magnetic core and a magnetic glue layer, the coil is wound on a side face wire groove of the magnetic core, the depth of the wire groove of the magnetic core is 0.4-0.8 time of the thickness of the coil, and the shielding layer is arranged on the side face of the magnetic glue layer. The magnetic glue layer completely wraps the coil and the side face of the magnetic core, the electrode is arranged on the lower portion of the totally-closed magnet structure, the wiring end of the coil is connected with the electrode, the shielding layer covers the upper portion of the totally-closed magnet structure, and the upper insulating layer covers the shielding layer. The contact surface of the magnetic core and the magnetic rubber layer is covered with the shielding layer, so that magnetic leakage is avoided, eddy current formed by the magnetic leakage and external metal is avoided, the ACR of the inductor is still stable under frequency change, and the energy conversion efficiency of a current switching power supply is improved.

Description

Technical field [0001] The invention involves the field of inductance technology, especially a coating inductance. Background technique [0002] With the development of switching power supply, high -frequencyization has become an important trend of switching power supply, and the coating -type winding inductance is low due to low cost and high qualification rate. The risk has waited for a large number of applications, but with the development of high frequency, due to the magnetic core and coated shielded magnetic glue layer, there is a certain leakage between the magnetic gum layer and the external metal forming vortex current, resulting in the inductance ACR as the frequency increases. The degradation is reduced, which reduces the conversion efficiency of the switching power supply. [0003] Therefore, there are defects in existing technology and need to be improved. Invention content [0004] To solve the technical problem of the present invention: providing a coating -type i...

AI Technical Summary

Problems solved by technology

[0002]With the development of switching power supplies, high frequency has become an important trend of switching power supplies, and the coating-type wound inductors are low in cost and qualified High efficiency, no one-piece forming required for pressure forming, the risk of open and short circuit of copper wires has been applied in a large number of applications, but with the development of high frequency, there is a certain amount of magnetic flux leakage between the magnetic core and the coated shielding magnetic layer and the external The metal of the metal forms an eddy current, which causes the ACR of the inductor to deteriorate as the frequency increases, thereby reducing the conversion efficiency of the switching power supply

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