JPS59100505A - Core - Google Patents

Abstract

PURPOSE:To round the external shape, and to form space at the center of a core by a method wherein the two magnetic paths of a non-loop type and having arc parts are arranged facing mutually, and both the main magnetic paths are connected by coupling magnetic paths at both the edge parts. CONSTITUTION:An arc type main magnetic path 2 and a main magnetic path 3 having the same shape therewith are arranged vertically and facing mutually to construct a core 1. Both the edge parts of the magnetic paths 2, 3 are connected by coupling magnetic paths 4, 5. Thereupon space enabled to accommodate parts, etc., is formed at the center, and the external shape is formed roundly. Further, the magnetic path 2 is a laminate constructed by stacking magnetic thin leaves of the plural sheets. Moreover, permeability of the magnetic path 2 is reduced by heating a part of the laminate constructed by winding round the amorphous magnetic thin leaves.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to cores used in ballasts, transformers, chokes, etc.

When incorporating a core into electrical equipment such as lighting equipment, it is best to use a core with a rounded outer shape and a space in the center to accommodate sockets, switches, or core support metal fittings. Alternatively, it may be most preferable for reasons such as the arrangement relationship with other parts, and such a core has been sought in the past.

The present invention was made in view of the above circumstances, and provides a core that has a rounded outer shape and a space in the center into which parts can be placed.

That is, the gist of the present invention is to provide a core characterized in that two non-annular main magnetic paths having arcuate portions are arranged opposite to each other, and both secondary magnetic paths are connected at both ends by a relay magnetic path. do. DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings.

FIGS. 1 to 5 each show an example of the structure of the core according to the present invention. In the core l shown in FIG. 1, a main magnetic path 2 having an arc shape and a main magnetic path 3 having the same shape are vertically arranged opposite to each other, and both ends of the bidirectional magnetic path 2s30 are connected to a relay magnetic path ( In other words, one end and the other end of the magnetic paths 2 and 3 are connected by the relay magnetic paths 4 and 5, respectively. The main magnetic paths 2, 3 and the relay magnetic paths 4.degree. 5 are each composed of a laminate formed by stacking a large number of strip-shaped magnetic thin pieces (including plates and the like). Silicon steel is used as magnetic flakes.

Iron, permalloy, supermalloy 9 composition is FevsB1
A material made of an amorphous magnetic material such as 3Sig or Fe79BtsSis is used. The same applies to other examples below. A conducting wire 6 is wound around the main magnetic path 2 of this core 1 . By winding the wire in this manner, an inductance element is obtained. That is, when electricity is passed through the conductor 6,
The magnetic flux flows through the main magnetic path 2. Relay magnetic path5. Main magnetic path 3 and relay magnetic path 4
Since it passes through a closed magnetic path consisting of , inductance is obtained.

In the core 7 shown in FIG. 2, a small arc-shaped main magnetic path 9 is arranged inside a large arc-shaped main magnetic path 8, and a secondary magnetic path 10. 11, and a leakage magnetic path (shunt) 12 at the intermediate portion. Main magnetic path 8°9, relay magnetic path 1.0, l1
The leakage magnetic path 12 is composed of a laminate formed by stacking a large number of strip-shaped magnetic thin pieces. A conducting wire 13 is connected between the relay magnetic path 10 of the main magnetic path 8 of this core 7 and the leakage magnetic path 12,
A conducting wire 14 is wound between the relay magnetic path 11 and the leakage magnetic path 12, and by winding the wires in this manner, a magnetic leakage transformer is obtained.

The core 15 shown in FIG. 3 has a main magnetic path 1 in the shape of a circular arc.
6 and a main magnetic path 17 of the same shape are arranged above and below, and the dual magnetic paths 16 and 17 are connected to each other by wrapping thin pieces of magnetic material such as silicon steel strips around both ends. kept at regular intervals. The thin pieces made of this magnetic material serve as relay magnetic paths 18 and 19. On the other hand,
The bidirectional magnetic path consists of a laminate in which 16 and 17 strip-shaped magnetic thin pieces are stacked. Main magnetic path 1 of this core 15
A conducting wire 20 is wound around the wire 6. By winding the core 15 in this manner, an inductance element is obtained. The winding is preferably carried out before connecting the double magnetic paths 16, 17 with the relay magnetic paths 18, 19. Main magnetic paths 16 and 1 of this core 15
When attaching a coil bobbin to coil bobbin 7 and winding the conductor, adjust the thickness and number of turns of the thin piece that will become the relay magnetic path 18, 19 appropriately, and adjust the protrusion dimension of the relay magnetic path 18, 19 and the dimension of the coil bobbin (not shown). If you try to match the
It becomes possible to obtain an interftance element with flat upper and lower surfaces.

The core 21 shown in FIG. 4 is the core 15 shown in FIG. 3 provided with a leakage magnetic path 22, and common numbers in FIGS. 3 and 4 are the same. It's raining things down. A gap film 23 is wound around the intermediate portion of the main magnetic paths 16 and 17 of the core 21, and a thin piece of magnetic material such as a silicon steel strip is further wound thereon. This thin piece forms the leakage magnetic path 22.

If the conducting wires 24 and 25 are wound between the relay magnetic path 19 and the leakage magnetic path 22 in the main magnetic path 16 of the core 21, and between the relay magnetic path 18 and the leakage magnetic path 22, magnetic leakage (
Leakage) transformer is obtained.

The core 26 shown in FIG. 5 has an annular main magnetic path 27.
and a main magnetic path 28 of the same shape are arranged above and below, and a relay magnetic path 29. is located close to the positive magnetic paths 27, 28.
30 are interposed. The main magnetic paths 27 and 28 are formed by winding an amorphous magnetic thin piece (amorphous ribbon) to form a toroidal laminate, and then forming a local (both relay magnetic paths 2
9.30) is heated and crystallized to lower the magnetic permeability, thereby making this laminate into a substantially non-annular magnetic path (open magnetic path), In the figure, the areas surrounded by dashed lines are crystallized portions 31° and 32. Therefore, the relay magnetic paths 29 and 30 essentially connect both ends of the main magnetic paths 27 and 28. The relay magnetic paths 29 and 30 are composed of a laminate formed by stacking a large number of strip-shaped magnetic thin pieces. A conductor 33 is wound around the main magnetic path 27 of this core 26 . By winding the wire in this manner, an inductance h is obtained.

, cores 1, 7, 15, 21 and 2 described so far
No. 6 has a space in the center where parts can be stored and has a rounded outer shape.

By making the core according to the present invention using an amorphous magnetic thin piece, the excellent soft magnetic properties of the amorphous magnetic thin piece can be utilized without deteriorating. This will be explained next.

Although amorphous magnetic flakes have excellent soft magnetic properties, they have the disadvantage that these properties deteriorate when stress and strain occur during processing. In particular, iron-based amorphous magnetic flakes having a composition of FeXMY have a significant tendency for properties to deteriorate due to stress strain. In the composition formula, M is B,
At least one of Si, C, Cr, and Mo, X has 70 to 85 atoms, and Y has 15 to 30 atoms. For example, an amorphous magnetic thin piece whose composition is Fet9B1aSis (Met manufactured by Allied Chemical Co., Ltd.)
glas■260553) to create a laminate.
After impregnating the laminate with resin so that it does not lose its shape when cutting, the laminate is cut to make a cut core. Compared to the laminate before resin immersion, the laminate is impregnated with resin at 50 mm, and after cutting it is 100 mm. Iron loss also increased. Therefore, when a cut core is wound and a current is passed through the winding, the effect of inductance becomes smaller (inductance loss occurs) and the temperature of the cut core increases significantly. This is because stress strain occurs in the amorphous magnetic thin piece when the impregnating resin cures and shrinks and when it is cut. However, when making the core according to the present invention, there is no cutting step that causes large stress and strain. Since there is no cutting process, there is no need to impregnate the laminate such as the main magnetic path with resin to firmly retain its shape, and it is possible to retain its shape by taping, etc., which causes almost no stress and strain. . Therefore, in the core according to the present invention, the soft magnetic properties of the amorphous magnetic flakes can be used without deteriorating them.

Note that the shape of the main magnetic path is not limited to a circular arc shape, but may be a horseshoe shape, a U-shape, or the like, as long as it has at least an arc-shaped portion. However, the main magnetic path is not necessarily a laminate. The same applies to the relay magnetic path and the leakage magnetic path. moreover,
The two main magnetic paths of the core do not necessarily have the same shape.

The core according to the present invention is configured as described above, in which two non-annular main magnetic paths having arcuate portions are arranged opposite to each other, and two bidirectional magnetic paths are provided at both ends and are a relay magnetic path. Since they are connected, they have a space in the center where parts can be placed, and they also have a rounded outer shape.

Next, examples will be described.

[Example 1] A core (inductance element) with a wire as shown in FIG. 1 was produced in the following manner.

A large number of rectangular silicon steel plates with a thickness of 0.3 mg and a width of 10 m are bent and overlapped to form an inner surface with a diameter of 40 m.
A laminate was made so that the outer surface became an arc with a radius of 50 mm, and then this was molded with resin to fix the shape, thereby creating two main magnetic paths. An example of winding in which the two main magnetic paths are connected at both ends using a relay magnetic path created by winding a conductor around one of the main magnetic paths and then laminating silicon steel plates made of the same material as above. I got 1 core.

[Example 2] A wire-wound core (magnetic leakage transformer) having the structure shown in FIG. 2 was produced in the following manner.

A long amorphous magnetic thin piece (Metglas 260552 manufactured by Allied Chemical Co., Ltd.) coated with the composition FeysBx3Sis was slit to have a width of 10w11, and then cut into short pieces to form a large number of strips. Then, these strips were bent into an arc shape and stacked to form an arc-shaped laminate. The main magnetic path was obtained by fixing the shape of the laminate with taping. After winding the conductor around the two main magnetic paths created as described above, the winding of Example 2 was achieved by connecting both ends of the two magnetic paths with two laminates made by overlapping the strips. Got the core.

[Brief explanation of the drawing]

1 to 5 are perspective views of examples of cores suitable for the present invention, respectively. 1.7, 15, 21, 26... Core 2, 3, 8, 9
゜16.17, 27.28... Main magnetic path 4, 5, 10
, 11゜1.8, 19, 29.30... Relay magnetic path agent Patent attorney Takehiko Matsumoto Figure 1 Figure 2 Figure 5

Claims (4)

[Claims] (1) A core characterized in that two non-annular main magnetic paths each having an arcuate portion are arranged opposite to each other, and both secondary magnetic paths are connected at both ends by a relay magnetic path. (2) The core according to claim 1, wherein a leakage magnetic path is provided between the two main magnetic paths. (3) The core according to claim 1 or 2, wherein the main magnetic path is a laminate formed by stacking a plurality of magnetic thin pieces. (4) The core according to claim 1 or 2, wherein the main magnetic path is formed by heating a part of a laminate formed by winding amorphous magnetic thin pieces to lower the magnetic permeability.