JPH08250333A - Inductor array - Google Patents

Abstract

PURPOSE: To provide an inductor array, wherein inductors are capable of being lessened in space between them, and cross talk is restrained from occurring between adjacent inductors. CONSTITUTION: An inductor array 10 is composed of inductors 11, 12, and 13 arranged in array, wherein the inductors 11, 12, and 13 are so arranged as to make the flows of magnetic flux of the adjacent inductors cross each other at right angles, so that the flows of magnetic flux of the inductors 11, 12, and 13 are not coincident with each other in direction, and as a result the inductors 11, 12, and 13 are hardly magneticaily coupled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inductor array in which a plurality of inductors used as a noise removing filter are arranged in parallel.

[0002]

2. Description of the Related Art Generally, a digital signal of an electronic device has many harmonics, and these harmonics flow out to a cable connected to another device, causing unnecessary radiation as noise.
Therefore, in order to remove this noise, an inductor is inserted in each signal line near the connector. On the other hand, as the number of signal lines between devices increases with the miniaturization and higher functionality of electronic devices, the pitch of connectors is being narrowed.

Therefore, when inserting and connecting the inductor in the vicinity of the connector, it is necessary to arrange the inductor at a narrow pitch as in the case of the connector. As a corresponding one, the one shown in FIG. 5 has been proposed. FIG. 5 shows a compact inductor array 1 in which the inductors 2 to be inserted in the respective signal lines are arranged in one magnetic body.

This inductor array 1 is formed by arranging three inductors 2 in a lateral direction, and each inductor 2 is formed by laminating a plurality of ferrite green sheets printed with a conductor paste. The printed conductor pastes are vertically connected by through holes to form a circular pattern 2a that vertically circulates. Both ends of the circular pattern 2a are connected to a connector or a signal line of an electronic device through external electrodes 2b.

[0005]

By the way, since the respective inductors 2 of the inductor array 1 are provided so that the conductor patterns respectively circulate vertically, they are formed in the respective inductors 2 as shown in FIG. The magnetic flux φ is flowing vertically.

However, in such an inductor array 1, when the space between the adjacent inductors 2 is narrowed to make it compact, the magnetic fluxes φ1, φ2, and φ3 generated in the inductors 2 are adjacent to each other. There is a problem that the inductor 2 is coupled (φ1 and φ2, φ2 and φ3 are coupled) to cause crosstalk.

In view of the above conventional problems, it is an object of the present invention to provide an inductor array which can suppress the crosstalk between adjacent inductors and can reduce the distance between the inductors.

[0008]

According to the present invention, in order to solve the above-mentioned problems, in an inductor array in which a plurality of inductors are arranged in parallel, the inductors are arranged such that the magnetic flux flow directions of the adjacent inductors are orthogonal to each other. It is characterized by having done.

[0009]

According to the present invention, since the inductors are arranged so that the magnetic flux flowing directions of the adjacent inductors are orthogonal to each other, the magnetic flux flowing directions of the adjacent inductors do not coincide with each other, which makes it difficult to couple them.

[0010]

1 to 4 show one embodiment of an inductor array according to the present invention. FIG. 1 is a perspective view showing the structure of the inductor array, FIG. 2 is an external perspective view of the inductor array, and FIG. A perspective view showing a laminated structure of an inductor array,
FIG. 4 is a sectional view showing the flow of magnetic flux in the inductor array.

As shown in FIG. 1, the inductor array 10 is formed in a lateral rectangular shape, and first to third inductors 11, 12, 13 are arranged in the left-right direction.

The first inductor 11 is formed so that its winding pattern 11a extends vertically, and the second inductor 12 is formed so that its winding pattern 12a extends in the left-right direction. The inductor 13 is formed such that its winding pattern 13a extends in the front-rear direction, and both ends of each winding pattern 11a, 12a, 13a are connected to the external electrode 14.

As shown in FIG. 3, the laminated structure of the inductor array 10 is formed by laminating a large number of ferrite green sheets 10a, and the dummy layers 10 are formed on the upper and lower sides.
b is arranged, and a plurality of conductor layers 10c are arranged between the dummy layers 10b.

Here, in each conductor layer 10b, a winding pattern 11a is vertically wound on the left side in FIG. 3, and a winding pattern 12a is horizontally rotated on the right side of the first inductor 11. In addition, a conductor paste 10d and a through hole 10e are formed on the right side of the second inductor 12 so that the winding pattern 13a goes back and forth.

The dummy layer 10b and the conductor layer 10c thus configured are sequentially laminated and pressure-bonded, the external electrodes 14 are applied to the laminated body, and then baked to manufacture the inductor array 10.

In order to form a large number of inductor arrays 10 at the same time, a large number of sets of conductor pastes 10d and through holes 10e are formed on each green sheet 10a, and these are divided into individual inductor arrays 10 after lamination and pressure bonding. You can

According to the inductor array 10 of this embodiment, as shown in FIG. 4, the magnetic flux φ1 is formed in the vertical direction in the first inductor 11, and the magnetic flux φ1 is formed in the horizontal direction in the second inductor 12 adjacent thereto. A magnetic flux φ2 is formed, and a magnetic flux φ3 is formed in the front-rear direction in the third inductor 13 adjacent to the second inductor 12, and the magnetic fluxes φ1, φ2, φ3 of the adjacent inductors 11, 12, 13 are formed.
Flow so that they are orthogonal to each other.

As a result, the adjacent magnetic flux φ1 and magnetic flux φ
2. Further, it is difficult for the adjacent magnetic fluxes φ2 and φ3 to be coupled with each other, and crosstalk is less likely to occur. Further, since the inductors 11, 12, 13 can be arranged close to each other, the size of the inductor array 10 can be reduced. Be promoted.

[0019]

As described above, according to the present invention,
Crosstalk between adjacent inductors can be suppressed,
In addition, the spacing between the inductors can be narrowed accordingly, so that the inductor array can be downsized.

[Brief description of drawings]

FIG. 1 is a perspective view showing a structure of an inductor array according to the present invention.

FIG. 2 is an external perspective view of an inductor array according to the present invention.

FIG. 3 is a perspective view showing a laminated structure of an inductor array according to the present invention.

FIG. 4 is a cross-sectional view showing the flow of magnetic flux in the inductor array according to the present invention.

FIG. 5 is a perspective view showing a structure of a conventional inductor array.

FIG. 6 is a sectional view showing the flow of magnetic flux in a conventional inductor array.

[Explanation of symbols]

10 ... Inductor array, 11, 12, 13 ... Inductor, φ1, φ2, φ3 ... Magnetic flux.

Claims (1)

[Claims] 1. An inductor array in which a plurality of inductors are arranged in parallel, wherein the inductors are arranged such that the magnetic flux flow directions of the adjacent inductors are orthogonal to each other.