JPH0461309A - Fabric structure inductance element - Google Patents

Abstract

PURPOSE:To prevent deterioration of inductance by reducing the influence of demagnetizing-field by magnetic lines even in case the size is reduced, through formation of a closed magnetic path with longitude magnetic cores and latitude magnetic cores by forming the latitude thread with energizing conductor covered with insulating film and magnetic line. CONSTITUTION:An inductance is formed in a fabric structure wherein a magnetic core 12 formed by binding one or more amorphous magnetic lines 11 is used as the longitude thread and a magnetic core 14 formed by binding an energizing conductive lead 13 such as copper lead covered with formal as an insulating film and the one or more amorphous magnetic lines is used as the latitude thread. In this inductance, when a current i flows into the energizing conductor lead 13 in the direction of arrow mark i, a magnetic field is excited for the longitude thread magnetic core 12 and latitude thread magnetic core 14 as indicated by the arrow mark H. As a result, a closed magnetic path is formed between the magnetic cores 12 and 14. Thereby, a large inductance can be obtained effectively almost in proportional to increase of permeability without deteriorating the inductance even in case the magnetic core 12 is short in length.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to textile structure inductance elements such as inductors and transformers used in high frequency bands suitable for micronization.

[Prior Art] FIG. 4 is a schematic diagram of a conventional textile structure inductance element disclosed in, for example, Japanese Unexamined Patent Publication No. 61-219114. For convenience of explanation, the inductance element in the figure is
We are talking about inductors. In the figure, 1 is a metal magnetic wire that can be drawn, 2 is a magnetic core composed of one or more magnetic wires 1, and □ serves as the warp of a woven fabric structure. 3 is an excitation conductor wire coated with insulation. Now, an inductance can be easily produced by making a long belt-shaped woven fabric using the magnetic wire 1 as the warp and the excitation conductor wire 3 as the weft, and then cutting the magnetic core 2 made of the magnetic wire 1 to the required length. . In this inductance, the excitation conductor wire 3 is directed in the direction of arrow i in the figure.
When a current i flows through the magnetic core 2, magnetic fields are excited in mutually opposite directions between adjacent magnetic cores 2, as shown by arrows H. As a result, the leakage magnetic flux from the tip of each magnetic core 2 can easily flow into the tip of the adjacent magnetic core 2 as shown by the dotted arrow Φ, and the quasi-closed magnetic path with a small demagnetizing field is magnetic! 111. That is, it is possible to effectively obtain a large inductance approximately in proportion to the increase in magnetic permeability of the magnetic core 2. Furthermore, by reducing the diameter of the magnetic wire 1 forming the magnetic core 2, the eddy current flowing through the magnetic core 2 is reduced, the loss can be reduced, and use in a high frequency band becomes possible.

[Problem to be solved by the invention] When the magnetic wires are long in a textile structure, the influence of the demagnetizing field can be ignored, and the magnetic field excited by the magnetic cores causes adjacent magnetic cores to be excited in mutually opposite directions. A quasi-closed magnetic path is formed for the magnetic wire between adjacent magnetic cores. However, when the overall size of the inductance element becomes smaller due to miniaturization, the length of the magnetic wire becomes shorter, and therefore the influence of the demagnetizing field cannot be ignored. That is, since the demagnetizing field becomes larger, the excited magnetic field is weakened, resulting in a problem of deterioration of inductance.

Therefore, the present invention was made in view of the above circumstances.
It is an object of the present invention to provide a textile structure inductance element that can prevent deterioration of inductance by reducing the influence of demagnetizing fields caused by magnetic wires even when the size is reduced.

[Means and Effects for Solving the Problems] In order to solve the above problems, the present invention is characterized in that the magnetic wire is used as the warp, and the excitation conductor coated with an insulating film and the magnetic wire are used as the weft in a woven fabric. By constructing an excitation conductor whose weft threads are covered with an insulating film and magnetic wires, a closed magnetic path is created by the warp thread magnetic core and the weft thread magnetic core.

[Example] (Example 1) FIG. 1 is a schematic diagram of Embodiment 1 of the present invention.

A detailed explanation will be given below with reference to the drawings. For convenience of explanation, an inductor is taken up as an inductance element. 1
A magnetic core 12 formed by bundling a book or a plurality of amorphous magnetic wires 11 is used as a warp, and an excitation conductor wire 13 such as a copper wire coated with formal as an insulating film is formed by bundling one or a plurality of amorphous magnetic wires. The magnetic core 14 is a weft and is constructed in the form of a woven fabric. In this inductor, a current i flows through the excitation conductor wire 13 in the direction of the arrow i in the figure.
Flows, a magnetic field is excited in the warp magnetic core 12 and the weft magnetic core 14 as shown by arrow H. As a result, magnetic cores 12 and 14
A closed magnetic path is created between the two. As a result, even when the magnetic core 12 is short, it is possible to effectively obtain a large inductance substantially proportional to an increase in magnetic permeability without deteriorating the inductance.

(Embodiment 2) FIG. 2 is a schematic diagram of Embodiment 2 according to the present invention. Even when the weft magnetic cores 141 are not connected continuously, a closed magnetic path is formed as shown by arrow H in the figure, so that the same effect as in the embodiment shown in FIG. 1 can be obtained. In Figure 2,
The same parts as in FIG. 1 are given the same reference numerals, and the explanation thereof will be omitted.

(Embodiment 3) FIG. 3 is a schematic diagram of a transformer of an inductance element according to Embodiment 3 of the present invention. In FIG. 3, the same parts as those in FIG. 1 are given the same reference numerals, and the explanation thereof will be omitted. That is, 'I
Figure a3 shows a transformer in which the excitation conductor wire 13 in Figure 1 is replaced with two wires, a primary conductor wire 131 and a secondary conductor wire 132, woven into a fabric.

Furthermore, by connecting the two conductor wires 131 and 132 in series, an inductance approximately twice that of the first embodiment can be obtained. It is fully surmised that in this transformer, similar to the second embodiment, the present invention can be implemented in the same manner even when the weft magnetic core is not continuous.

As described above, by simultaneously using the conductor wire and the magnetic wire as weft threads, a closed magnetic path is created between the warp thread magnetic core and the weft thread magnetic core, so that deterioration of inductance due to micronization can be prevented. Naturally, this textile structure inductance element can be used even if it is integrated with a capacitor or a resistor. In this case, since this textile structure inductance element has a closed magnetic circuit configuration, it is less affected by other magnetic external conditions and is convenient for integration.

[Effects of the Invention] As described above, according to the textile structure inductance element of the present invention, the magnetic field excited in the magnetic core by the demagnetizing field of the magnetic wire can be prevented from weakening and the inductance from deteriorating. Therefore, the present invention is very useful for microfabrication of textile structure inductance elements.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the configuration of a textile structure inductor in Example 1 of the present invention, FIG. 2 is a schematic diagram showing the configuration of a textile structure inductor in Example 2 of the invention, and FIG. 3 is a schematic diagram showing the configuration of a textile structure inductor in Example 2 of the present invention. FIG. 4 is a schematic diagram showing the configuration of a textile structure transformer in Example 3, and FIG. 4 is a schematic diagram showing the configuration of a conventional textile structure inductor. DESCRIPTION OF SYMBOLS 1...Magnetic wire, 2...Warp magnetic core, 13...Exciting conductor wire, 14...Weft magnetic core, 1...-Secondary conductor wire, 32...Secondary conductor wire.

Claims (1)

[Claims] A textile structure inductance element characterized in that it is constructed in the form of a textile, with magnetic wires as warp threads, and an excitation conductor coated with an insulating film and magnetic wires as weft threads.