JPH0387008A - Lc composite element - Google Patents

Abstract

PURPOSE:To obtain an element which operates in distributed or concentrated constant manner by spirally a layer structure film in which two insulation films and two electrode foils are alternately laminated and integrally formed. CONSTITUTION:Electrode foils 11, 13 and insulation films 12, 14 are alternately laminated to form a layer structure film 15. Then, the film 15 is superposed in a hollow spiral state and intergrally formed. Thus, coils are formed between terminals 11a and 11b provided at both ends of the foil 11 and between terminals 13a and 13b provided at both ends of the foil 13, and a distributed capacity is formed in a capacitor between the layers. Thus, a noise film to be operated in distributed or concentrated constant manner, or an element having a common mode choke or a normal mode choke function is obtained.

Description

[Detailed description of the invention] [Industrial application field] This invention relates to LC composite parts.

(Prior Art) FIG. 14 is a diagram showing the structure of a layer structure film of a conventional LC composite element disclosed in, for example, Japanese Unexamined Patent Publication No. 59-139619.
FIG. 15 is a partially cutaway external view of an LC composite element in which the layered film shown in FIG. 14 is wound and a magnetic material is used for the winding core, and FIG. 16 is an equivalent circuit diagram of FIG. 15.

In the figure, 1.2 is an insulating film, 3,4°5 is an electrode foil, 3a, 3b, 4a, 5b are terminals provided on the electrode foil, and 6 is a magnetic material, as shown in Figure 15. 6 as the center, the insulating films 1 and 2 and the electrode foil 3 shown in FIG.
4.5 LC wrapped with layered film? An i combination element is formed.

Next, the operation will be explained. In Figures 14 and 15, an inductance coil is connected between terminals 3a and 3b.
The terminal 4a and Sb operate as a capacitor. FIG. 16 shows the equivalent circuit, with the inductance between the terminals 3a and 3b and the capacitance between the terminal 4a and the 5th layer.

[Problem to be solved by the invention]

As mentioned above, conventional LC composite parts include a foil-like coil formed by winding one electrode and two insulating films or paper on the core, and two foil-like coils on the outer circumferential surface of this coil. A capacitor formed by wrapping an electrode foil and two sheets of insulating film or paper that serve as dielectrics together concentrically, and the coil and capacitor form a single distributed constant coil and capacitor, respectively. However, it is nothing more than a concentrically integrated and composite part.

This invention was made to solve the above-mentioned problems, and its purpose is to provide an LC composite element that can constitute a distributed constant filter and also has common mode choke and normal mode leakage functions. shall be.

(Means for Solving the Problems) An LC composite element according to the present invention is an LC composite component consisting of a coil and a capacitor, which includes two insulating films,
The LC composite element is characterized in that it is integrally formed by winding a layered film alternately laminated with two electrode foils each having a terminal at both ends in a spiral shape from one end.

In addition, a laminated film in which multiple layers of 'rj18i foil with terminals provided on both sides and an intermediate electrode foil with terminals provided only on one side and which is shorter than the electrode foil, alternately laminated with an insulating film interposed therebetween, is twisted from one end side. The above objective is achieved by providing an LC3 composite element characterized by being integrally formed by winding it in a spiral shape.

[Effect]

With the above configuration, the two electrode foils form an inductance coil between their respective terminals, and at the same time, capacitors are formed dispersedly between the electrode foils with an insulating film interposed between them. It can be an LC composite element having a noise film, a common mode choke, or a normal mode choke function that operates in this manner.

(Example) (Example 1) Embodiments of the present invention will be described below with reference to the drawings.

Figure 1 is a structural diagram of a layered film according to Example 1 of the present invention, Figure 2 is an explanatory diagram of the assembly of Figure 1, and Figure 3 is 's
An external view of an LC composite element formed by winding the layered film shown in FIG. 1, and FIGS. 4 and 5 are equivalent circuit diagrams of the same embodiment.

In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

In FIG. 1, reference numerals 11 and 13 indicate strip-shaped electrode foils made of copper or aluminum, lla and flb terminals provided at both ends of the electrode foil 11, and 13a.

13b is a terminal provided at both ends of the electrode Wi13, and these terminals 11a, llb, 13a, 13b are electrode foils 11.13.
It may be a pull-out terminal provided integrally with the electrode foil 11.13 or a separate lead wire attached to the electrode foil 11.13 by welding or the like.
2.14 is a strip-shaped insulating film made of dielectric polyester, paper, etc. and having approximately the same shape and size as the electrode foil 11.13.

First, the electrode foils 11 and 13 and the insulating films 12 and 14 are alternately laminated as shown in FIG.
5 is formed, and the layered film 15 consisting of these four layers is wound from one end side into a thin hollow spiral shape and formed integrally (FIG. 2).

Further, the two insulating films 12 and 14 are not made of the same material, but may have different materials and thicknesses. Here, the insulating film 12 sandwiched between the metal foils 11 and 13 had a high dielectric property, and the insulating film 14 on the other side had a low dielectric property.

The cylindrical coil 16 as shown in FIG. 3 is formed by forming a coil between the terminals 11a and flb and between terminals 13a and 13b, and dispersing capacitors as distributed capacitance between the layers, as shown in the equivalent circuit shown in FIG. 4.

Furthermore, from a lumped constant perspective, as shown in FIG. 5, it functions as a common mode choke composed of LC, and constitutes a distributed constant type common mode choke or line filter.

(Example 2) A second example according to the present invention will be described below with reference to the drawings.

FIG. 6 is a structural diagram of a layered film according to the second embodiment,
FIGS. 7(A) and 7(B) are equivalent circuit diagrams of the same embodiment, and FIG.
11 and 12 are configuration diagrams of other embodiments, and FIG.
The figure is an equivalent circuit diagram of FIG. 12.

In the drawings, the same reference numerals indicate the same or corresponding parts.

In FIG. 6, 21.25 is a strip-shaped electrode foil made of copper or aluminum, etc.; 23 is an intermediate electrode foil that is also strip-shaped and shorter than the electrode foil 21.25; 21g, 21b;
are terminals provided on both sides of the electrode foil 21, 25a, 25b
are terminals provided on both sides of the electrode foil 25, 23b is a terminal provided on one side of the intermediate electrode foil 23, and these terminals 21a
.

21b, 23b, 25a, and 25b are lead terminals provided integrally with the electrode foil 21.25 or the intermediate electrode foil 23, or lead wires or the like that are separate from the electrode foil 21.25 or the intermediate electrode foil 23 are attached by welding or the like. It can be anything. Reference numerals 22, 24, and 26 are strip-shaped insulating films made of polyester, paper, or the like and having substantially the same shape and size as the electrode foils 21, 25 and the intermediate electrode foil 26.

First, the electrode foil 21.25, the intermediate electrode foil 26, and the insulating films 22, 24.26 are alternately laminated to form a layered film 27 as shown in FIG. 6, and a three-layered structure consisting of six layers is formed. The film 27 is wound in a thin hollow spiral from one end thereof to form a coil as in Example 1 (see FIG. 2).

Equivalent circuit diagrams corresponding to the cylindrical laminated coils formed as described above in FIGS. 3 and 16 are shown in FIGS. 7(A) and 7(B).

In FIG. 7(A), ILa, ILb--5La, 5
Lb-1 indicates the distributed inductance that functions by the electrode foils 21 and 25, and is 28Ca.

28 Cb-m- is the interlayer capacitance between the electrode foils 21 and 25, 29 Ca, 29 Cb, --- is the interlayer capacitance between the electrode foil 21 and the intermediate electrode foil 23, 30
Ca, 30 Cb, --- indicates the interlayer capacitance between the electrode foil 25 and the intermediate electrode foil 23.

Here, terminals 21a, 25a and terminal 21b.

25b, it is equivalent to the lumped constant noise filter shown in FIG. 7(B), and the capacitance 2 in FIG. 7(A)
8Ca, 28Cb --- one is usually called x-con.

Also, the capacitance C in Fig. 7(B) and the capacitance C in Fig. 7(A)
The capacitance of 29ca and 30Ca is usually called Y capacitance. ILa in FIG. 7(A).

I Lb----, 5La, 5Lb are shown in Figure 7 (B)
The common mode choke coils La and Lb function as common mode choke coils La and Lb. Note that in this embodiment, each element functions in a distributed constant manner, so that the frequency characteristics are improved.

(Example 3) Example 3 shown below further develops Example 2 and increases the number of laminated layers to form a layered coil for three-phase alternating current.

FIG. 8 is a structural diagram of a layered film according to the third embodiment,
FIG. 9 is an equivalent circuit diagram of the same embodiment.

In FIG. 8, 31, 35.39 is a strip-shaped electrode foil made of copper or aluminum, etc.; 33°37.41 is an intermediate electrode foil that is also strip-shaped and shorter than the electrode foil;
a, 31b are terminals provided on both sides of the electrode foil 31;
a, 35b are terminals provided on both sides of the electrode foil 35, 39
a, 39b are terminals provided on both sides of the electrode foil 39;
b is a terminal provided on one side of the intermediate electrode foil 33; 37b is a terminal provided on one side of the intermediate electrode foil 37; 41b is a terminal provided on one side of the intermediate electrode foil 41;
Similarly, a lead terminal provided integrally with the electrode foil, or a lead wire separate from the electrode foil may be attached by welding or the like. 32, 34, 36°, 38, 40, 42 are strip-shaped insulating films made of polyester, paper, etc. and having substantially the same shape and dimensions as the electrode foils 31, 35, 39 and the intermediate electrode foil 33°, 37.41.

First, electrodes 31, 35.39 and intermediate electrode foil 33.3
7.41 and the insulating film 33.37°41 are laminated alternately to form a layered film 43 as shown in FIG. It is rolled up into a roll, as shown in Figure 2.
A cylindrical laminated coil as shown in Figure 3 (Figure 3,
16 equivalent) is formed.

FIG. 9 shows an equivalent circuit of the laminated coil formed as described above.

In addition, it is possible to manufacture a complex distributed constant coil with multiple layers by stacking any number of layers in the same manner. Moreover, the intermediate electrode foil used in Example 2 and Example 3 can be used for common mode removal. Furthermore, as shown by dotted lines in FIG.
If 7b and 41b are short-circuited with a short-circuit wire 44, a non-inductive structure can be achieved.

In the embodiment described above, the layered coil is formed into an air-centered cylindrical shape, but as shown in FIG. 10,
U-shaped magnetic cores 17a and 17b are inserted into the center of the cylinder to form a magnetic core 1 made of ferrite or the like as shown in FIG.
7a, 17b may be used as an LC composite element, or the first
As shown in FIG. 2, magnetic cores 17a and 17b can be inserted into a plurality of cylindrical laminated coils 16 and 16' to magnetically couple the plurality of coils. FIG. 13 shows this equivalent circuit. Therefore, it can also be used as a distributed constant type common mode choke or a transformer. Furthermore, although the cross-sectional shape of the winding core is shown as round in the embodiment, it can be similarly implemented even if it is square. In addition, in the figure, 11a', llb', 1
3a' and 13b' are terminals provided on the laminated coil 16'.

〔Effect of the invention〕

As described above, according to the present invention, since a layered coil and a capacitor are constructed using two electrode foils with an insulating film interposed therebetween, a compact common mode choke coil or line filter with distributed constant type characteristics can be created. can get.

In addition to the electrode foil with terminals on both sides, an intermediate electrode foil that is shorter than the electrode foil and has a terminal on only one side can be used as a common mode noise grounding terminal. L with non-inductive structure by shorting between terminals
C? It can be made into a single element.

Furthermore, a distributed constant type filter for three or more phases is formed by stacking the electrode foils and insulating layers in multiple stages.
It can be a Ca composite element.

[Brief explanation of drawings]

Fig. 1 is a structural diagram of a layered film according to Example 1 of the present invention, Fig. 2 is an explanatory diagram of assembly of Fig. 1, and Fig. 3 is an LC composite element formed by winding the layered film of Fig. 1. 4 and 5 are equivalent circuit diagrams of the same embodiment. Figure 6 is a structural diagram of the layered film of Example 2, and Figure 7 (A
). (B) is an equivalent circuit diagram of FIG. 6, FIG. 8 is a configuration diagram of the layered film of Example 3, FIG. 9 is an equivalent circuit diagram of FIG. 8, FIGS. 10, 11, and 12. is a block diagram showing another embodiment, FIG. 13 is an equivalent circuit diagram of FIG. 12, FIG. 14 is a block diagram of a layered film of a conventional LC composite element, and FIG. 15 is a layered film of FIG. 14. FIG. 16 is a partially cutaway external view of an LC composite element formed by winding and using a magnetic material for the winding core, and FIG. 16 is an equivalent circuit diagram of FIG. 15. In the drawings, the same reference numerals indicate the same or corresponding parts. 11.13---One electrode foil 12.14---Insulating film 11a, flb, 13a, 13b=・One terminal 15...
...layer structure film

Claims (2)

[Claims] (1) In an LC composite component consisting of a coil and a capacitor, two insulating films and two electrode foils each having a terminal at both ends are alternately laminated and wound in a spiral shape from one end. An LC composite element characterized by being integrally formed by turning. (2) In an LC composite component consisting of a coil and a capacitor, electrode foils with terminals on both sides and intermediate electrode foils with terminals on only one side and shorter than the electrode foils are alternately layered via insulating films. An LC composite element characterized in that it is integrally formed by winding laminated layered films in a spiral shape from one end side.