JP2002025831A - Magnetic core, case for assembling the same, and method for assembling the core - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic core, which can significantly improve the workability at assembling of the core, can be stabilized in magnetic characteristic even against a high frequency, and can be reduced in size, and to provide a case used for assembling the core and a method for assembling the core. SOLUTION: The magnetic core is constituted with laminate blocks 23A and 23B, each of which is composed of a pair of symmetrically formed sheet-like magnetic materials being held appropriately between both end sections in the lengthwise direction of laminate blocks 21A and 21B which are composed of a pair of sheet-like magnetic materials formed symmetrically to the center line and used for winding coils 26A and 26B via magnetic gap forming members (spacers) 24 and, in addition, the laminating directions of laminate blocks 23A and 23B are set perpendicular to the laminating directions of the blocks 21A and 21B which are used for winding the coils 26A and 26B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an amorphous magnetic material used as a transformer or other inductance,
The present invention relates to a magnetic core formed by laminating sheet-like magnetic materials such as permalloy and silicon steel plates.

[0002]

2. Description of the Related Art Conventionally, transformers, induction reactors,
Ferrite is widely used in choke coils and the like as an iron core of the coil, that is, a magnetic core. However,
In recent years, the use of amorphous alloys instead of the ferrite has become common. The magnetic core made of this amorphous alloy has a high squareness ratio in the BH characteristic curve, has a small coercive force,
Core loss is small, temperature rise can be kept low,
The advantage that downsizing becomes easy is obtained. In addition, when the magnetic core made of the amorphous alloy is used as a magnetic core of an inductance for a power supply circuit, there are advantages such as improvement of efficiency, wide-range voltage control, and stable temperature characteristics, and the like. Kind of miniaturization, high efficiency and high performance can be achieved.

In order to manufacture a magnetic core using such an amorphous alloy, a magnetic core is formed as a magnetic core by winding and laminating those formed in a sheet shape for convenience in manufacturing. This magnetic core facilitates setting of an appropriate magnetic gap and winding work in order to obtain required magnetic characteristics when forming a transformer, an inductive reactor, a choke coil, etc. by applying a winding. Therefore, this is cut into a cut core shape.

When the above-described transformer or the like is formed using the cut core-shaped magnetic core, it is important to set the magnetic gap so as not to change.
Therefore, in the related art, as a method of forming a magnetic gap in the annularly formed magnetic core, a magnetic gap is previously set in the magnetic core (by means such as appropriate insertion of a spacer) and then inserted into a predetermined core case. Various methods have been proposed, such as a fixing method, or a method of setting a magnetic gap after inserting a magnetic core into a predetermined core case (by means such as appropriately inserting a spacer) (Japanese Patent Laid-Open No. 8-17649). Gazette, JP-A-6-188125).

[0005] However, in the magnetic core proposed hitherto, a laminated body made of a sheet-like magnetic material is formed into a circular or elliptical wound body forming a closed magnetic circuit, and this wound body is appropriately cut. By storing the magnetic core in a predetermined core case, the overall shape of the magnetic core can be held or fixed. In this case, the operation of housing and fixing the laminated body of the sheet-shaped magnetic material constituting a part of the wound body in the core case so as to maintain a predetermined magnetic gap is extremely complicated and difficult. There are some difficulties.

From this viewpoint, conventionally, as shown in FIGS. 5 and 6, in order to form the whole shape into a rectangular shape,
It has been proposed and implemented to configure a required magnetic core by using a laminated block made of a sheet-like magnetic material that is symmetrical in front, rear, left and right, respectively.

That is, as shown in FIG. 6, the magnetic core 10 shown in FIG. 5 is made up of laminated blocks 12A and 12B made of sheet-like magnetic materials symmetrical in front and rear, and sheet-like magnetic materials symmetrical in left and right. Laminate block 13
A and 13B are abutted at both ends via magnetic gap forming members (spacers) 14 as appropriate. Next, as shown in FIG. 5, the magnetic core 10 is bonded and bonded while applying pressure in the direction of the arrow to form the magnetic core 10 having a rectangular shape as a whole. The pair of left and right laminated blocks 13A and 13B of the magnetic core 10 formed in this manner are:
By appropriately winding the coils 16A and 16B, it is possible to adapt to uses such as a transformer, an induction reactor, and a choke coil.

[0008]

In the above-mentioned conventional magnetic core, since the whole shape is rectangular, advantages such as setting of the magnetic gap and stabilization of the whole shape can be obtained. However, in order to stabilize the setting of the magnetic gap, a high level of skill and high precision are required in an assembling operation for joining and bonding and fixing the laminated body blocks. In addition, when applied to a high-frequency transformer, a magnetic gap is not required, so that it is necessary to create a laminated block so that no magnetic resistance is generated when bonding and bonding the blocks, and a high level of skill is required in the assembly work. And high accuracy are required.

The inventors of the present invention have conducted various studies and trial productions, and as a result, have found that when bonding and fixing the laminate block,
At both ends of the laminated block made of a sheet-like magnetic material around which a coil formed symmetrically is wound, the laminated block made of a vertically-symmetrically-formed sheet-like magnetic material is appropriately interposed via a magnetic gap forming member (spacer). By setting the stacking direction of the stacked blocks so as to be orthogonal to the stacking direction of the stacked blocks on which the coil is wound, the work for assembling the magnetic core is performed. Not only can be achieved, and the magnetic characteristics of the magnetic core can be stabilized, and not only can the magnetic core be reduced in size, but also the magnetic characteristics at high frequencies can be sufficiently stabilized. Was.

[0010] Further, at the time of coupling and fixing the laminated blocks, a pair of core cases having the same or symmetrical shape are provided so as to be mutually inserted into the laminated blocks on which the symmetrically formed coils are wound. By connecting and holding the vertically symmetrically formed laminate blocks at predetermined positions of a pair of core cases, workability in assembling the magnetic core can be significantly improved. I found it.

Accordingly, an object of the present invention is to significantly improve workability in manufacturing a magnetic core, achieve stabilization of magnetic characteristics of the magnetic core, and realize a reduction in the size of the magnetic core. An object of the present invention is to provide a magnetic core, a case for assembling the same, and a method of assembling the same, which can sufficiently stabilize magnetic characteristics with respect to a high frequency.

[0012]

In order to achieve the above-mentioned object, a magnetic core according to the present invention comprises a longitudinally extending laminated body block comprising a pair of sheet-like magnetic bodies for winding coils formed symmetrically. At both ends in the direction, a laminated body block composed of a pair of symmetrically formed sheet-shaped magnetic bodies is sandwiched appropriately via a magnetic gap forming member (spacer), and a pair of laminated bodies sandwiched by these are formed. The stacking direction of the blocks is set to be orthogonal to the stacking direction of a pair of stacked blocks for winding the coil.

[0013] In this case, a pair of core cases having the same or symmetrical shape are provided for coupling and fixing the respective laminated body blocks, and a pair of laminated body blocks for winding the symmetrically formed coil is provided. The pair of laminated blocks can be inserted into each other and housed in a predetermined position of the pair of core cases.

However, the magnetic core assembling case for assembling the magnetic core according to the present invention comprises a pair of core cases having the same or symmetrical shape, and a pair of left and right sheets for winding the coil. A case coupling portion having a storage portion for storing a laminated block made of a magnetic material, and a storage for storing the laminated block made of the pair of sheet-like magnetic materials to be clamped as a fixing base of the case coupling portion. And a case base provided with respective parts.

In this case, a fitting projection and a fitting hole for coupling and fixing each other can be respectively provided at the open ends of the case coupling portions of the pair of core cases.

Further, a magnetic gap forming portion (spacer storing portion) can be provided adjacent to a storing portion for storing the laminated block formed at the case base of the pair of core cases.

Further, the method of assembling a magnetic core using the magnetic core assembling case includes a method of forming coils symmetrically formed in storage portions formed in a case coupling portion of a pair of core cases having the same or symmetric shape. A laminate block composed of a pair of sheet-like magnetic bodies for winding is stored, and a pair of laminate blocks are respectively stored in the storage portions formed in the case base, and pressure is directly applied to each laminate block. The present invention is characterized in that a rectangular magnetic core is assembled by connecting the case connecting portions to each other without adding.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a magnetic core, a case for assembling the same, and a method of assembling the same according to the present invention will be described below in detail with reference to the accompanying drawings.

[0019]

First Embodiment FIGS. 1 to 3 show one embodiment of a magnetic core and a method of assembling the same according to the present invention.

In FIG. 1, a magnetic core 20 according to the present embodiment is shown.
Are laminated body blocks 21 each formed of a pair of sheet-like magnetic bodies for forming coils symmetrically and winding coils respectively.
A, 21B, and a laminated block 23 made of a pair of sheet-like magnetic bodies formed symmetrically at both upper and lower ends in the longitudinal direction of the laminated blocks 21A, 21B.
A and 23B (see FIG. 2).

At the upper and lower ends of the symmetrical laminate blocks 21A and 21B having the above-described structure, the pair of laminate blocks 23A and 23B are properly held via magnetic gap forming members (spacers) 24. In addition, the stacking direction of the pair of stacked blocks 23A and 23B to be sandwiched is set so as to be orthogonal to the stacking direction of the pair of stacked blocks 21A and 21B for winding the coil. 1 and FIG. 2).

The magnetic core 20 constructed as described above
After the coils 26A and 26B are wound in advance on the middle portions of the pair of laminated blocks 21A and 21B via an insulator 28 as appropriate (see FIG. 3), the coils 26A and 26B are inserted and fitted in the directions of arrows shown in FIG. The magnetic core 20 is combined and adhesively bonded to form the magnetic core 20 having a rectangular shape as a whole.

In the magnetic core 20 of this embodiment having the above-described configuration, the laminating directions are respectively set at the upper and lower ends of a pair of left and right laminated magnetic blocks 21A and 21B for winding coils. By sandwiching a pair of stacked blocks 23A and 23B set to be orthogonal to each other, the magnetic characteristics due to the high-frequency current can be stabilized, and the overall configuration of the magnetic core 20 can be the same as the conventional magnetic characteristics. The size can be reduced as compared with a magnetic core having the same.

[0024]

Embodiment 2 FIG. 4 shows another embodiment of the magnetic core 20 and the method of assembling the same according to the present invention, and particularly shows an assembling method using a case for assembling the magnetic core 20. .

In FIG. 4, the laminated blocks constituting the magnetic core 20 of the present embodiment are a pair of laminated blocks 21A, 21B and 23 in the first embodiment.
A and 23B can be applied.

Therefore, a pair of core cases 30A and 30B having the same or symmetrical shape are applied to the assembling case used in this embodiment. That is, each of the core cases 30A and 30B has a laminated block 21A made of a pair of left and right sheet-shaped magnetic bodies for winding coils.
Case connecting portions 32A and 32B including storage portions 31A and 31B for storing the storage portion 21B;
Case bases 3 each having a storage portion 33 for storing the laminated body blocks 23A and 23B made of the pair of sheet-like magnetic materials to be clamped as fixed base portions of A and 32B.
And 8. Note that these core cases 30
A and 30B can each be constituted by integral molding of a known heat-resistant synthetic resin having excellent insulation properties.

At the open ends of the case coupling portions 32A and 32B of the pair of core cases 30A and 30B, a fitting projection 39a and a fitting hole 39b for coupling and fixing each other are provided, respectively. When the laminated body blocks 21A and 21B are housed in the housing portions 31A and 31B, respectively, the bonding and fixing can be stabilized when they are connected to each other.

The pair of core cases 30A, 30
A laminate block 23A formed on the case base 38 of FIG.
By providing the magnetic gap forming section (spacer storing section) 34 adjacent to the storing section 33 for storing the 23B, it is possible to easily and easily form a constant and stable magnetic gap. It is also possible to adopt a configuration in which the magnetic gap forming section (spacer storage section) 34 is not provided, depending on the use of the magnetic core 20.

Therefore, when assembling the magnetic core 20 according to the present invention shown in the first embodiment by using the pair of core cases 30A and 30B having the above-described configuration, as shown in FIG. The connection and fixing of the rectangular magnetic core 20 can be easily and easily achieved without applying pressure.

The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and many design changes can be made without departing from the spirit of the present invention. Of course you can.

[0031]

As is apparent from the above-described embodiment, the magnetic core according to the present invention is provided at both ends in the longitudinal direction of a laminated block composed of a pair of sheet-like magnetic bodies for winding coils formed symmetrically. In the above method, a laminated block composed of a pair of symmetrically formed sheet-like magnetic materials is sandwiched appropriately via a magnetic gap forming member (spacer), and the laminated block of the sandwiched pair is laminated. By setting the direction to be perpendicular to the laminating direction of the pair of laminated blocks for winding the coil, the operation for assembling the magnetic core can be facilitated and the magnetic core can be easily assembled. Not only achieves the stabilization of the magnetic properties of the magnetic core, thereby realizing the downsizing of the magnetic core, but also sufficiently stabilizes the magnetic properties at high frequencies. , It has a number of advantages.

According to the method for assembling a magnetic core of the present invention, a pair of core cases having the same or symmetrical shape are provided when connecting and fixing the laminated blocks, and the coil formed symmetrically with the left and right sides is provided. By being mutually inserted and coupled to the laminated block to be wound, by being configured to house and hold the vertically symmetrically formed laminated block at predetermined positions of the pair of core cases,
The workability at the time of assembling the magnetic core can be remarkably improved, and advantages such as the downsizing of the magnetic core and the reduction of the manufacturing cost can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing an assembled state of an embodiment of a magnetic core according to the present invention.

FIG. 2 is a schematic perspective view showing each laminated block constituting the magnetic core shown in FIG. 1 and a coupling arrangement thereof.

FIG. 3 is a schematic front view of the magnetic core shown in FIG. 1;

FIG. 4 is a schematic perspective view showing another embodiment of the magnetic core according to the present invention, in a state in which the laminated blocks are connected and fixed using an assembling case.

FIG. 5 is a schematic plan view of a conventional magnetic core in an assembled state.

FIG. 6 is a schematic perspective view showing each laminated block constituting the magnetic core shown in FIG. 5 and a coupling arrangement thereof.

[Explanation of symbols]

Reference Signs List 20 magnetic core 21A, 21B left / right paired laminate block 23A, 23B upper / lower paired laminate block 24 magnetic gap forming member (spacer) 26A, 26B coil 28 insulator 30A, 30B paired core case 31A, 31B laminated block ( 21A, 21B) Storage section 32A, 32B Case coupling section 33 Storage section of laminated block (23A, 23B) 34 Magnetic gap forming section (spacer storage section) 38 Case base 39a Fitting projection 39b Fitting hole

Claims (6)

[Claims] 1. A laminated body composed of a pair of symmetrically formed sheet-shaped magnetic materials at both ends in the longitudinal direction of a laminated block composed of a pair of sheet-shaped magnetic materials for winding coils formed symmetrically to the left and right. The blocks are appropriately sandwiched via a magnetic gap forming member (spacer), and the stacking direction of the sandwiched pair of stacked blocks is adjusted to the direction of the pair of stacked blocks for winding the coil. A magnetic core, which is set so as to be orthogonal to the laminating direction. 2. A pair of core cases having the same or symmetrical shape are provided at the time of bonding and fixing each of the laminated body blocks, and a pair of laminated body blocks for winding the symmetrically formed coils are provided. 2. The magnetic core according to claim 1, wherein said pair of laminated body blocks are inserted and connected to each other to house and hold said pair of sandwiched blocks at predetermined positions of said pair of core cases. 3. A case combination comprising a pair of core cases having the same or symmetrical shape, and a storage portion for storing a laminated body block comprising a pair of left and right sheet-shaped magnetic bodies for winding a coil. And a case base having a storage portion for storing the laminated block made of the pair of sheet-like magnetic materials to be clamped as a fixing base of the case coupling portion. Assembly case. 4. The magnetic core according to claim 3, wherein a fitting projection and a fitting hole for coupling and fixing each other are provided at the open ends of the case coupling portions of the pair of core cases. Assembling case. 5. A magnetic gap forming portion (spacer storing portion) is provided adjacent to a storing portion for storing a laminated body block formed at a case base of the pair of core cases. Case for assembling a magnetic core. 6. A laminated body composed of a pair of sheet-like magnetic bodies for winding coils formed symmetrically in left and right sides in storage portions formed in a case coupling portion of a pair of core cases having the same or symmetric shape. By storing the blocks, storing a pair of laminated blocks respectively in the storage part formed in the case base, without directly applying pressure to each laminated block, by coupling the case coupling parts to each other, 6. A method for assembling a magnetic core using the case for assembling a magnetic core according to claim 3, wherein a rectangular magnetic core is assembled.