Integrally-formed inductor with high-precision resistance value

Abstract

An integrally formed inductor with high-precision resistance value relates to the technical field of inductance components and comprises a coil and a soft magnetic metal magnet. The coil is characterized in that the coil comprises an enameled wire coil body with an integrated copper wire structure and two electrodes located at the head end and the tail end of the enameled wire coil body; the two electrodes are formed into a flat shape by stamping a copper wire, and are metalized to form a weldable metal material layer; the enameled wire coil body is implanted into a mold and filled with soft magnetic powder for mold pressing, the soft magnetic powder is subjected to mold pressing forming to form a soft magnetic metal magnet, and the two electrodes extend to the outside of the soft magnetic metal magnet. The integrated inductor is high in resistance value precision (the tolerance range is + / -5%) and inductance value precision, has large saturation current, is suitable for mass production, and can be widely applied to server equipment such as a GPU (Graphic Processing Unit), a CPU (Central Processing Unit) and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of inductive components, particularly to the structure and manufacturing method improvement of high-precision resistance value integrated inductors. BACKGROUND

[0002] Integrated inductors are high-performance electronic components made through metal alloy powder die casting process. The coil is embedded inside the magnetic powder, forming a fully enclosed integrated structure, and the surface pins are directly led out from the coil. The structure is compact and stable in performance. Its working principle is based on electromagnetic induction: when current passes through the coil, the magnetic powder forms a closed magnetic circuit, generating magnetic flux that induces electromotive force at both ends of the coil, achieving energy storage and filtering functions. This design not only reduces magnetic leakage, but also effectively suppresses electromagnetic interference (EMI), and is widely used in modern electronic devices.

[0003] The pins of existing integrated inductors need to be welded by laser or resistance welding. The pins are the key to current conduction, and the difference in welding steps can result in low precision of resistance and inductance values, and the welding method cannot be applied to large saturation currents. SUMMARY

[0004] In summary, the purpose of the present application is to solve the above-mentioned deficiencies of existing integrated inductors and propose a high-precision resistance value integrated inductor.

[0005] To solve the deficiencies of the prior art, the technical solution adopted is as follows: A high-precision resistance value integrated inductor includes a coil and a soft magnetic metal magnet. The coil includes a lacquered wire coil body with an integrated copper wire structure and two electrodes at the ends of the lacquered wire coil body. The two electrodes are formed into a flat shape by copper wire stamping and form a weldable metal material layer after metallization treatment. The lacquered wire coil body is implanted in a mold and filled with soft magnetic powder for molding. The soft magnetic powder is molded into a soft magnetic metal magnet, and the two electrodes extend to the outside of the soft magnetic metal magnet.

[0006] Further improved technical features of the present application include: The weldable metal material layer attached to the surface of the two electrodes is a tin or silver weldable metal material.

[0007] The inner hole of the lacquered wire coil body is circular or elliptical, and the two electrodes are parallel pins or 180° pins.

[0008] The two electrodes are led out from the opposite sides of the soft magnetic metal magnet and extend to the bottom surface of the soft magnetic metal magnet after being attached to the side surface.

[0009] The enameled wire coil body and the two electrodes of the present application are in an integrated structure, the two electrodes are formed into a flat shape by punching copper wire, and a weldable metal material layer is formed after metallization treatment, replacing the existing laser welding or resistance welding pin, the integrated inductance of the present application has high resistance value precision (tolerance range is ±5%), high inductance value precision, large saturation current, is suitable for mass production, and can be widely applied to GPU, CPU and other server devices. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 The present application is a structural schematic diagram. DETAILED DESCRIPTION

[0011] The structure of the present application is further described below in combination with the drawings and preferred specific embodiments of the present application.

[0012] Referring to Figure 1 The present application discloses an integrated high-precision resistance value inductance, which comprises a coil and a soft magnetic metal magnet. The coil comprises a coil body 1 and two electrodes 2. The coil body 1 is wound by enameled wire into a structure with a circular or elliptical inner hole. The two electrodes 2 are located at the two ends of the enameled wire coil body 1 and are in an integrated copper wire structure with the coil body 1, that is, the two electrodes 2 are copper wires extended from the two ends of the coil body 1, which are formed into a flat shape by punching and then form a weldable metal material layer after metallization treatment. Compared with the existing structure, the pin welding is not required, so the integrated inductance of the present application has high resistance value precision (tolerance range is ±5%), high inductance value precision, large saturation current, is suitable for mass production, and can be widely applied to GPU, CPU and other server devices. The soft magnetic metal magnet 3 is filled with soft magnetic powder and molded in a mold in the enameled wire coil body. The two electrodes 2 extend to the outside of the soft magnetic metal magnet.

[0013] The preferred technical solution of the present application is that the weldable metal material layer attached to the surface of the two electrodes is a weldable metal material such as tin or silver, which avoids oxidation of the two electrodes and facilitates welding with the PCB board.

[0014] The two electrodes 2 of the present application can be parallel pins or 180° pins. The preferred lead-out mode of the two electrodes 2 is to lead out from the opposite sides of the soft magnetic metal magnet, and then extend to the bottom surface of the soft magnetic metal magnet after being attached to the side surface.

Claims

1. A high-precision integrally molded inductor, comprising a coil and a soft magnetic metal magnet; characterized in that: The coil includes an enameled wire coil body with an integral copper wire structure and two electrodes located at both ends of the enameled wire coil body; the two electrodes are formed into a flat shape by stamping copper wire and then metallized to form a solderable metal material layer; the enameled wire coil body is inserted into a mold and filled with soft magnetic powder for molding, and the soft magnetic powder is formed into a soft magnetic metal magnet after molding, and the two electrodes extend to the outside of the soft magnetic metal magnet.

2. The high-precision integrally molded inductor according to claim 1, characterized in that: The solderable metal material layer attached to the surfaces of the two electrodes is tin or silver solderable metal material.

3. The high-precision integrally molded inductor according to claim 1, characterized in that: The inner hole of the enameled wire coil body is circular or elliptical, and the two electrodes are parallel leads or 180° leads.

4. The high-precision integrally molded inductor according to claim 1, characterized in that: The two electrodes are led out from the opposite sides of the soft magnetic metal magnet, and after being led out, they extend to the bottom surface of the soft magnetic metal magnet by attaching to the back side.

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