A method for making an inductor and the product made therefrom

A technology of inductors and magnetic cores, which is applied in the field of passive components to reduce heat problems

Inactive Publication Date: 2019-04-05
TAIWAN GREEN POINT ENTERPRISE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, according to the inventor's research and development of the preparation method of magnetic core inductors for many years, although the relative permeability (relative permeability; μ r ) is low, so it has the characteristics of high saturation current value (saturation current; Isat); however, it needs to increase the number of winding coil turns under the premise of meeting the specified inductance value (inductance; L), which also produces high DC Impedance (DC resistance; DCR) and cause thermal problems of electronic equipment

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  • A method for making an inductor and the product made therefrom
  • A method for making an inductor and the product made therefrom
  • A method for making an inductor and the product made therefrom

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Embodiment Construction

[0046] Before the present invention is described in detail, it should be noted that in the following description, similar components are denoted by the same numerals.

[0047] refer to image 3 , a first embodiment of the manufacturing method of the inductor of the present invention, comprising a cold forming step S1, a heating step S2, a winding step S3, a package hot pressing forming step S4, and a punching step S5 , and a wire shaping step S6.

[0048] Such as Figure 4 As shown, the cold forming step S1 is to form a magnetic core 2 by cold pressing a first magnetic component in a magnetic core mold 71 having a columnar mold cavity 710 . In the first embodiment of the present invention, the pressure implemented in the cold forming step S1 is between 3000kgw / cm 2 to 7000kgw / cm 2 . Core 2 is along the same as Figure 7 and Figure 8 The shown axis Y extends, and the cross-section of the magnetic core 2 along the vertical direction of the axis Y is an oblong circle; whe...

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Abstract

A method for making an inductor comprises following steps: (a) preparing a magnetic core from a first magnetic component through cold pressing and moulding; (b) heating the magnetic core; (c) windingthe coil section of a wire around the heated magnetic core so that opposite bonded sections of the wire can extend in a direction opposite to the magnetic core from two opposite ends of the coil section; and (d), after the step (c), putting the wire wound magnetic core in a die, filling a second magnetic component in the die, and carrying out hot pressing moulding to form a magnetic shell that wraps the magnetic core and the coil section of the wire. The invention also provides an inductor prepared by the method mentioned above. The cold-press moulded magnetic core has the advantages of low relative magnetic permeability and high saturated current value. The hot-press moulded magnetic hell has high relative magnetic permeability and wraps the magnetic core and the coil section. The numberof turns of the coil section is not increased, the required inductance is reached, the heat caused by DC resistance is reduced, and the saturated current value is compensated at the same time.

Description

technical field [0001] The invention relates to a method for preparing a passive component, in particular to a method for preparing an inductor and its products. Background technique [0002] Passive components such as resistors, capacitors and inductors have been widely used in circuits of mobile electronic devices. Taking the magnetic core inductor in the aforementioned passive components as an example, it is an impedance coil used to weaken the high-frequency current in the circuit. Based on the characteristics of low impedance and high current resistance, the magnetic core inductor is often used in electronic The device's power supply. The basic structure of a conventional magnetic core inductor includes a magnetic core, a coil wound around the magnetic core, and a magnetic shell covering the magnetic core and the coil so that opposite ends of the coil are exposed to the outside. The above-mentioned magnetic core and magnetic shell were completed by cold pressing proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/00H01F41/04H01F41/02
CPCH01F41/005H01F41/0206H01F41/04
Inventor 陈正岳
Owner TAIWAN GREEN POINT ENTERPRISE
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