KR200465556Y1 - Aluminum wire winding on-board type inductor - Google Patents

Abstract

The present invention provides an annular magnetic core, an aluminum wire wound in a coil form along an edge of the magnetic core, each copper wire electrically connected to each of both ends of the aluminum wire and extending downward, An aluminum winding inductor comprising a connecting terminal made of a conductor that binds an end portion of an aluminum wire and the copper wire to each other, and a tube member including the connecting terminal therein and surrounding a binding portion of the aluminum wire and the copper wire. do.

Description

Aluminum Wire Inductors {ALUMINUM WIRE WINDING ON-BOARD TYPE INDUCTOR}

The present invention relates to an onboard inductor that can be fixed to a substrate by soldering, and more particularly, to an onboard aluminum winding inductor formed by winding an aluminum wire on an annular magnetic core.

A typical on-board inductor is manufactured by winding a copper wire in a coil shape along a rim of a toroidal magnetic core, and the end of the copper wire extending downward is inserted into a board hole in which electrical wiring is formed and then soldered. And fixed to the substrate.

1 shows a conventional on-board inductor. As shown in the figure, a conventional inductor comprises a copper wire surrounding the rim of an annular magnetic core, such as a ferromagnetic core, in the form of a coil.

However, in recent years, as copper demand soared internationally, the cost of inductors has risen. Therefore, various attempts have been made to reduce the manufacturing cost of the inductor, and one of them has been studied to use aluminum wire instead of copper wire.

Compared with copper wire, aluminum wire has similar characteristics such as conductivity, but the price is less than 50%, so if the inductor can be manufactured using aluminum wire, the manufacturing cost of the inductor can be lowered. However, on-board inductors using aluminum wires have not been commercialized yet, because aluminum wires have a problem in that soldering is not stable.

That is, the inductor manufactured by winding the wire around the magnetic core is seated on the board and then soldered by inserting both ends of the wire into the board hole. When aluminum wire is used instead of copper wire, the aluminum wire is well coated. Since it is not supported, there is a problem that the inductor is frequently dropped from the substrate because soldering is not performed stably.

As a result, aluminum wires are not utilized in on-board inductors despite their cost advantages.

The present invention has been devised to solve the above problems, and the on-board magnetic coil is wound around the aluminum core in the form of a coil to form an inductor while the soldered part is formed of copper wire, thereby enabling stable soldering It is an object of the present invention to provide an aluminum winding inductor in which the mounting can be made stable and robust.

In order to achieve the above object, the present invention provides an annular magnetic core, an aluminum wire wound in a coil form along an edge of the magnetic core, and electrically connected to each of both ends of the aluminum wire and extending downward. Each copper wire, a connecting terminal made of a conductor that binds the aluminum wire and an end of the copper wire to each other, and a tube member including the connecting terminal therein and surrounding the binding portion of the aluminum wire and the copper wire. An aluminum winding inductor is provided.

According to the present invention, both ends of the aluminum wire cross each other at the top of the magnetic core and extend to the front and the rear, respectively, and are bound to the copper wire by the connection terminals at the front and the rear of the magnetic core.

According to the present invention, the tube member includes a hermetic tube surrounding the binding portion where the ends of the aluminum wire and the copper wire are bound by the connection terminal to block contact with the outside air, and the tube member includes the And a shielding tube for receiving the aluminum wire and the bound copper wire disposed in the front and rear directions of the magnetic core therein to prevent contact with the aluminum wire wound around the magnetic core.

According to the present invention, the connection terminal is formed of a sleeve-type connection terminal in which the aluminum wire and the copper wire are coaxially connected, or a pair of connections such that the aluminum wire and the copper wire are laterally bound to each other. And an additionally formed splice type connection terminal, wherein the aluminum wire and the copper wire are electrically connected through the connection terminal without being directly contacted.

According to the present invention, it is possible to provide an aluminum winding inductor which can be stably soldered while forming an inductor by winding an aluminum wire around the magnetic core, thereby enabling stable on-board mounting. This enables the manufacture of low cost inductors.

1 shows a copper winding inductor according to the prior art.
2 is a perspective view of an aluminum winding inductor according to the present invention.
3 is a side view of the aluminum winding inductor according to the present invention.
Figure 4 is a block diagram for explaining each part of the aluminum winding inductor according to the present invention.
5 is a view for explaining the binding portion between the aluminum wire and the copper wire in the aluminum winding inductor according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a perspective view of the aluminum winding inductor according to the present invention, Figure 3 is a side view of the aluminum winding inductor according to the present invention, Figure 4 is a configuration diagram for explaining each part of the aluminum winding inductor according to the present invention, 5 is a view for explaining the binding portion between the aluminum wire and copper wire in the aluminum winding inductor according to the present invention.

Referring to the drawings, the aluminum winding inductor according to the present invention is an annular magnetic core 10 and the aluminum wire 20 wound in the form of a coil along the edge of the magnetic core 10 and the end of the aluminum wire 20 And a tube member including a copper wire 30 to be bonded with the aluminum wire 20, a connection terminal 40 to bind the aluminum wire 20 to the copper wire 30, and a sealing tube 51 and / or a shielding tube 55. It includes.

In the aluminum winding inductor according to the present invention, the wire surrounds the edge of the toroidal magnetic core 10 in the form of a coil, and the wire is an aluminum wire 20 formed of an aluminum material.

According to the present invention, the aluminum wire 20 is wound in a coil form as the winding starts at the top of the magnetic core 10 and proceeds in one direction and finishes again at the top. Accordingly, both ends of the aluminum wire 20 cross each other at the top of the magnetic core 10 and extend downward from the top at each of the front and rear surfaces of the magnetic core 10.

As shown in FIG. 4, the copper wire 30 is bound to the aluminum wire 20 extending downward from the top at the front and rear of the magnetic core 10. The copper wire 30 may be in the form of a single wire and may be in the form of a lead wire in which a plurality of thin copper wires are twisted.

According to the present invention, the aluminum wire 20 and the copper wire 30 are fixed to each other using the connection terminal 40 made of a conductor.

Referring to FIG. 5, the connection terminal may be a sleeve type connection terminal 40 (see FIG. 5A) or a splice type connection terminal 40 ′ (see FIG. 5B). .

As shown in FIG. 5A, the sleeve-type connection terminal 40 is formed of a uniaxial cylindrical connection portion in which the aluminum wire 20 and the copper wire 30 are coaxially connected, and the aluminum wire at each of the upper and lower ends thereof. 20 and the ends of the copper wire 30 are inserted and engaged by the pressing force to be electrically connected.

As shown in (b) of FIG. 5, the splice type connection terminal 40 ′ has a pair of cylindrical connection portions such that the aluminum wire 20 and the copper wire 30 are laterally arranged and bound together. In the type 41 is formed, the aluminum wire 20 and the copper wire 30 are inserted into each of the connecting portions 41 and engaged by the pressing force to be electrically connected.

At the time of the binding by the connection terminals 40 and 40 ', the aluminum wire 20 and the copper wire 30 are not connected directly but are connected through the connection terminals 40 and 40 as a medium.

Referring back to FIG. 4, according to the present invention, a sealed tube 51 such as a heat shrink tube is covered with a binding portion where the aluminum wire 20 and the copper wire 30 are crimped together using the connection terminal 40. Protect the binding site.

When aluminum and copper are in contact with each other in air, there is a disadvantage in that damage due to galvanic corrosion occurs. According to the present invention, the aluminum wire 20 and the copper wire 30 may be connected via the connection terminal 40, but may be directly coupled to each other without being in contact with each other, and may use a closed tube 51 such as a heat shrink tube. This prevents the galvanic corrosion from occurring because the binding site is exposed to the outside to prevent direct contact with air.

According to the present invention, starting from the aluminum wire 20 extending downward from the front and rear surfaces of the magnetic core 10 and including the binding portion of the aluminum wire and the copper wire wrapped with the sealing tube 51, Extension portions located in the front and rear surfaces are covered with a shielding tube 55 such as a silicone tube or a class tube.

Shielding tubes 55, such as silicon and class tubes, electrically shield the extension at the front and back of the magnetic core 10 to prevent the aluminum wire 20 and copper wire 30 from affecting inductor characteristics. can do.

According to this configuration, the copper wire 30 bound to the aluminum wire 20 to the front and rear surfaces of the inductor according to the present invention is formed to extend down.

Aluminum is more ductile than copper, so aluminum wire is more flexible than copper wire. Therefore, when the winding coil is formed using only the aluminum wire 20, there is a concern that the inductor is relatively vulnerable to the impact applied to the substrate when the inductor is onboard. In other words, there is a possibility that the inductor will flow on the substrate when an impact is applied, which may increase the fragility of the solder. However, according to the present invention, the copper wire 30 extends in a state in which the aluminum wire 20 is bound to the front and rear surfaces of the inductor, and thus the copper wire 30 is interposed between both front and rear surfaces of the inductor. Support function. This makes it possible to prevent inductors from flowing on the substrate while using ductile aluminum wires.

According to the present invention, the inductor may further include a base 60. The upper surface of the base 60 is formed with a seating groove 62 in which the annular magnetic core 10 is seated. The magnetic core 10 wound around the aluminum wire 20 is seated in the seating groove 62 of the base 60 and fixed using an epoxy resin. At this time, the copper wire 30 bound with the aluminum wire 20 extends down through the through hole 65 formed in the base 60. The inductor is on board so that the bottom surface of the base 60 rests on the substrate.

With this configuration, it is possible for the inductor according to the present invention to be fixed to the substrate in a conventional manner in which copper wire is soldered on the substrate after being seated on the substrate in the same manner as the conventional inductor. Therefore, it is possible to manufacture an inductor with low cost while eliminating the problem that solder is not attached when using aluminum wire.

10: magnetic core 20: aluminum wire
30: copper wire 40: connection terminal
51: sealed tube 55: shielded tube

Claims (5)

An annular magnetic core 10,
Aluminum wire 20 wound in the form of a coil along the edge of the magnetic core 10,
Each copper wire 30 electrically connected to each of both ends of the aluminum wire and extending downward;
A connection terminal 40 made of a conductor that binds the ends of the aluminum wire 20 and the copper wire 30 to each other;
And a tube member including the connection terminal (40) therein and surrounding a binding portion of the aluminum wire (20) and the copper wire (30). The method of claim 1,
Both ends of the aluminum wire 20 cross each other at the upper end of the magnetic core 10 and extend to the front and the rear, respectively, and the copper wire (by the connection terminal 40 at the front and rear of the magnetic core) 30) and an aluminum winding inductor. The method of claim 1,
The tube member,
Aluminum, characterized in that it comprises a sealing tube (51) for blocking the contact with the outside air wrapped around the binding portion where the end of the aluminum wire 20 and the copper wire 30 is bound by the connection terminal 40 Winding inductor. The method according to claim 2 or 3,
The tube member receives the aluminum wire 20 and the bundled copper wire 30 disposed in the front and rear directions of the magnetic core 10 therein and is wound around the magnetic core 10. Aluminum shielding inductor comprising a shielding tube (55) which prevents contact with 20). 3. The method according to claim 1 or 2,
The connection terminal is formed of a sleeve type connection terminal 40 to which the aluminum wire 20 and the copper wire 30 are coaxially connected, or the aluminum wire 20 and the copper wire 30 are side surfaces. A splice type connecting terminal 40 'formed with a pair of connecting portions 41 so as to be coupled to each other,
In the connection terminals 40 and 40 ', the aluminum wire 20 and the copper wire 30 are electrically connected to each other via the connection terminals 40 and 40' without being directly contacted. Winding inductor.

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