JP2002075747A - Gapped magnetic core and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a gapped magnetic core which can secure required characteristics, while the gap width of the core is maintained at an arbitrary size, and to provide a method of manufacturing the core. SOLUTION: The magnetic core is provided with a magnetic core body 104, composed of a magnetic material and a gap G provided in the body 104. The magnetic core is also provided with a spacer 103 which is inserted into the gap G and is constituted of a composite material composed of a insulating member 101, made of a plate-like insulating material 101 and a magnetic member 102 made of plate-like magnetic materials 102a,..., 102i, and 102j.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic core with a gap used for an electric circuit element such as an inductor or a current transformer (hereinafter referred to as CT).

[0002]

2. Description of the Related Art Generally, a magnetic core is formed by winding a magnetic ribbon,
It is made by laminating a number of annular pieces made by punching out magnetic ribbons. When a gap is provided in the magnetic core, a part of the magnetic core is cut by a cutting machine. Next, a space of an insulator is inserted between the cut surfaces so as to sandwich the cut surfaces. There is a 1: 1 relationship between the gap width provided on the magnetic core and the DC superposition characteristics of the inductor of the magnetic core with a gap. That is, in order to manufacture a variety of inductors having a gap magnetic core, a variety of gap widths corresponding to the inductor must be provided.

[0003]

Since the conventional magnetic core with a gap is constructed as described above, it must be cut into a gap width according to the required characteristics. It takes time to change the setup of the cutting work, and there are problems such as the need for various types of cutting blades.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has an object to provide a magnetic core with a gap and a method of manufacturing the same, which can ensure required characteristics with high precision while keeping a gap width at an arbitrary size. The purpose is to get.

[0005]

According to a first aspect of the present invention, there is provided a magnetic core with a gap, comprising: a magnetic core main body made of a magnetic material; and a gap provided in the magnetic core main body. A spacer made of a composite member of a member and a magnetic member is provided.

In a magnetic core with a gap according to a second aspect of the present invention, a magnetic core body composed of an annular laminated body wound with a magnetic ribbon and a gap formed by cutting the annular laminated body into a magnetic path of the magnetic core body are provided. A magnetic core with a gap in which a spacer is inserted into a cut surface of the gap, wherein a composite member of an insulating member and a magnetic member is used as the spacer.

[0007] In the magnetic core with a gap according to a third aspect of the present invention, a magnetic core main body comprising an annular laminated body in which punched magnetic cores are laminated;
A magnetic core with a gap in which a gap formed by cutting an annular laminated body is provided in a magnetic path of the magnetic core body, and a spacer is inserted into a cut surface of the gap, and a composite member of an insulating member and a magnetic member is used as the spacer. Is used.

In a magnetic core with a gap according to a fourth aspect of the present invention, a composite member in which a plate-shaped insulating material and a plate-shaped magnetic material are laminated is used as a spacer.

In the magnetic core with a gap according to a fifth aspect of the present invention, a composite member in which a plate-shaped insulating material and a plate-shaped magnetic material are laminated is used as a spacer, and a direction in which the plate-shaped insulating material and the plate-shaped magnetic material extend. Is arranged in parallel with the end face of the magnetic core main body constituting the gap, and the composite member is disposed.

In the magnetic core with a gap according to a sixth aspect of the present invention, a composite member in which a plate-shaped insulating material and a plate-shaped magnetic material are laminated is used as a spacer, and the extending direction of the plate-shaped insulating material and the plate-shaped magnetic material is extended. Is arranged in parallel with the cut surface of the gap to dispose the composite member.

In a magnetic core with a gap according to a seventh aspect of the present invention, a composite member in which a plate-shaped insulating material and a plate-shaped magnetic material are laminated is used as a spacer, and the laminating direction of the plate-shaped insulating material and the plate-shaped magnetic material is changed. The composite member is disposed orthogonal to the laminating direction of the magnetic core body.

In a magnetic core with a gap according to an eighth aspect of the present invention, the magnetic core body in which a spacer is provided in the gap is placed in a case and configured as an inductor having a winding.

In a magnetic core with a gap according to a ninth aspect of the present invention, the magnetic core body having a spacer provided in the gap is placed in a case and configured as a current transformer having a winding.

According to a tenth aspect of the present invention, there is provided a method of manufacturing a magnetic core with a gap, the step of providing a gap in a magnetic core body, and adjusting the dimensions of a composite member in which a plate-shaped insulating material and a plate-shaped magnetic material are laminated. And a step of inserting the composite member as a spacer into the gap.

In the method of manufacturing a magnetic core with a gap according to an eleventh aspect of the present invention, the step of providing a gap in the magnetic core main body and the step of adjusting a dimension in a laminating direction of a composite member obtained by laminating a plate-shaped insulating material and a plate-shaped magnetic material are performed. A step of adjusting the width of the composite member as a spacer to be inserted into the gap, and a step of inserting the composite member as a spacer into the gap by adjusting the dimension in the stacking direction to the width of the gap. And

In the method of manufacturing a magnetic core with a gap according to a twelfth aspect, a step of forming a magnetic core body composed of a laminated body by stacking magnetic materials, and a pair of end faces forming a gap in the magnetic core body Forming a spacer, adjusting the dimensions of a composite member obtained by laminating a plate-shaped insulating material and a plate-shaped magnetic material, and configuring the composite member as a spacer inserted into the gap. Inserting the composite member into the gap with the extending direction being parallel to the end face of the magnetic core main body.

In the method for manufacturing a magnetic core with a gap according to a thirteenth aspect, a step of forming a magnetic core body composed of a laminated body by laminating magnetic materials, a step of forming a gap in the magnetic core body, Adjusting the dimensions of a composite member formed by laminating a plate-shaped insulating material and a plate-shaped magnetic material to form a spacer to be inserted into the gap; and setting the laminating direction of the plate-shaped insulating material and the plate-shaped magnetic material to the magnetic core body. And inserting the composite member into the gap in a state perpendicular to the magnetic material laminating direction.

According to a fourteenth aspect of the present invention, there is provided a method of manufacturing a magnetic core with a gap, comprising the steps of winding a magnetic ribbon to form a magnetic core body composed of an annular laminated body, and cutting the annular laminated body of the magnetic core body. Forming a gap by adjusting the dimensions of a composite member formed by laminating a plate-shaped insulating material and a plate-shaped magnetic material to form a spacer inserted into the gap; Inserting the composite member into the gap with the extending direction of the material being parallel to the cut surface of the magnetic core body.

In the method of manufacturing a magnetic core with a gap according to a fifteenth aspect, a step of forming a magnetic core body composed of an annular laminated body by laminating punched magnetic cores, and cutting the annular laminated body of the magnetic core body is performed. Forming a gap, and adjusting the dimensions of a composite member obtained by laminating a plate-shaped insulating material and a plate-shaped magnetic material, and configuring the composite member as a spacer to be inserted into the gap,
Inserting the composite member into the gap with the extending direction of the plate-shaped insulating material and the plate-shaped magnetic material being parallel to the cut surface of the magnetic core body.

In the method for manufacturing a magnetic core with a gap according to a sixteenth aspect, the magnetic characteristics of the magnetic core with a gap are adjusted by adjusting the number of plate-like insulating materials and the number of plate-like magnetic materials in the composite member constituting the spacer. It includes a step of adjusting.

In the method of manufacturing a magnetic core with a gap according to a seventeenth aspect of the present invention, the magnetic properties of the magnetic core with a gap are adjusted by adjusting the relative position of the plate-like insulating material with respect to the plate-like magnetic material in the composite member constituting the spacer. Is adjusted.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Embodiment 1 of the present invention will be described with reference to FIGS. FIG.
FIG. 4 is an explanatory view showing a manufacturing process of the magnetic core with a gap in the embodiment according to the present invention. FIG. 3 is a characteristic diagram showing a relationship between the position of the insulator made of the plate-shaped insulating material 101 and the relative magnetic permeability of the spacer 103.

A magnetic core with a gap as a finished product after the completion of the manufacturing process is shown in FIG. 1 (c). FIG. 1 (c)
FIG. 1 shows a top view of the magnetic core with a gap. In the figure, 101 is an insulating member made of a plate-shaped insulating material made of an insulating thin plate, 102 is a magnetic member made by laminating a plate-shaped magnetic material made of a magnetic thin plate, and 103 is an insulating member 101 made of a plate-shaped insulating material. And a magnetic member formed by laminating a plate-like magnetic material, and a spacer as a gap body composed of a composite member laminated. 104 is a magnetic core body composed of an annular laminated body formed by winding a magnetic ribbon. A gap 105 provided in the core body 104 is a magnetic core with a gap formed by inserting a spacer 103 into the gap G of the magnetic core body 104. The spacer 103 as a gap body made of a composite member in which an insulating member 101 made of a plate-shaped insulating material and a magnetic member formed by stacking a plate-shaped magnetic material are
The magnetic core body 104 is inserted into a gap G having a gap width tg provided in the magnetic core main body 104 to secure predetermined magnetic characteristics of the magnetic core 105 with a gap.

The manufacturing process of the magnetic core with gap 105 having the spacer 103 shown in FIG. 1C is as follows.
First, in a first step: STEP 1 shown in FIG. 1A, a spacer 103 as a gap body is manufactured as a preparation stage. The spacer 103 is an insulating member 10 made of one plate-shaped insulating material 101a having a strip shape.
1 and a plate-shaped magnetic material 102 comprising a plurality of magnetic ribbons
a,..., 102i, and 102j are laminated and superposed on a magnetic member 102, and are fixed to each other. The rectangular parallelepiped spacer 103 thus configured has a thickness dimension in the stacking direction of the insulating member 101 formed of a plate-shaped insulating material and the magnetic member 102 formed by stacking a plurality of plate-shaped magnetic materials [ FIG.
Left and right dimensions in (a)] is the gap width t of the gap G
g [see FIG. 1 (b)], and the width dimension of an insulating member 101 made of a plate-shaped insulating material and a magnetic member 102 formed by laminating a plurality of plate-shaped magnetic materials [FIG. Of the magnetic core main body 104 formed of an annular laminate formed by winding a magnetic ribbon, and the thickness dimension of the end face forming the gap G (the right and left dimensions in FIG. 1A). The length dimension (depth dimension in FIG. 1 (a)) of the magnetic member 102 formed by laminating a plurality of insulating members 101 and plate-shaped magnetic materials is wound around a magnetic ribbon. The width dimension of the magnetic core main body 104 made of an annular laminated body is set. FIG. 1A is a cross-sectional view in a plane orthogonal to the extending direction of an insulating member 101 made of a plate-shaped insulating material and a magnetic member 102 made of a plate-shaped magnetic material.

The specific relative magnetic permeability μ of the insulating member 101
1 is 1, and the magnetic member 102 has a relatively large predetermined relative magnetic permeability μ2 of, for example, more than 1000 as an intrinsic relative magnetic permeability. The insulating member 101 made of one plate-shaped insulating material 101a has a thickness ti in the laminating direction with the magnetic member 102, and the plate-shaped magnetic material 102 has a thickness ti in the laminating direction with the plate-shaped insulating material 101. .., 102i, 102 composed of a plurality of laminated magnetic ribbons having a thickness such that the total tm is tg-ti.
j. Here, tg is the gap width (see FIG. 1B). Here, the insulating member 101
And one plate-shaped insulating material 101a having the same thickness as the plate-shaped insulating material 101a and forming the magnetic member 102.
Zero plate-like magnetic materials 102a,..., 102i, 10
The spacer 103 is formed by 2j.

Next, a second step: S shown in FIG.
In TEP2, a magnetic core body 104 made of a wound core having a gap G is manufactured as a preparation stage. A magnetic plate made of a long magnetic ribbon is wound to form a wound core of an annular laminated body, and the annular portion of the wound core is partially cut to form a magnetic core body 104 having a gap G having a gap width tg. It is formed.

As a completion stage, the first step shown in FIG. 1A is formed in the gap G of the magnetic core main body 104 formed in the second step shown in FIG. A spacer 103 as a gap body is inserted. This plate-shaped insulating material 101
The spacer 103 composed of the plate-shaped magnetic material 102 and the plate-shaped insulating material 101 and the extending direction of the plate-shaped magnetic material 102 correspond to the end face 104 of the magnetic core body 104 forming the gap G.
a and 104b are inserted in the gap G so as to be parallel to them. End faces 104a, 104b of magnetic core body 104
Is formed by a cut surface obtained by partially cutting the annular portion of the wound iron core. Thus, by inserting the spacer 103 into the gap G of the magnetic core main body 104,
The magnetic core with gap 105 shown in FIG. 1C is configured.

Here, the spacer 103 is formed by the insulating member 10.
Insulating material 101a and magnetic member 10 constituting
2, plate magnetic material 102a,..., 102
The direction of extension of i, 102j is made parallel to the end faces 104a, 104b of the magnetic core body 104, which is formed by a cut surface obtained by partially cutting the annular portion of the wound core, and is inserted into the gap G. Laminating direction of annular laminated body composed of wound iron core in magnetic core body 104 and insulating member 101
And plate-shaped insulating material 101a constituting magnetic member 102
And plate-like magnetic materials 102a,..., 102i, 10
2j are orthogonal to each other, and the spacer 10
3 and the spacers 103 are attached to the magnetic core body 104 in a state where the adaptation between the end faces 104a and 104b of the magnetic core body 104 is secured.
Can be appropriately and easily inserted into the gap G, and the operation can be simplified.

The magnetic core with gap 105 thus configured
As shown in FIG. 1A, one plate-like insulating material 101 a forming the insulating member 101 is replaced with ten plate-like magnetic materials 102 forming the magnetic member 102.
a,..., 102i, 102j are disposed at the left ends in the drawing, and the position of the plate-shaped insulating material 101a is set to t = 0 (see FIGS. 2A and 2B). Magnetic core body 1
FIG. 3 shows the magnetic characteristics of the magnetic core with gap 105 in which the spacer 103 is inserted into the gap G of 04. Here, the number of the plate-like insulating materials 101a is one, and the position is t.
= 0, the magnetic characteristics correspond to the portion of the curve A in FIG. 3 corresponding to the horizontal axis t = 0. The equivalent relative magnetic permeability μs of the entire spacer 103 is about 910.

A winding for generating inductance is applied to a magnetic core with gap 105 composed of a magnetic core main body 104 in which a spacer 103 is inserted into a gap G. The core is housed in a case and configured as an inductor. The characteristic of this inductor is the equivalent relative permeability μ of the entire spacer 103.
It is governed by the magnetic characteristics of the magnetic core with gap 105 in which s is about 910, so that the desired inductance value can be secured and the desired characteristics can be obtained. And the magnetic core 105 with a gap
By adjusting the equivalent relative magnetic permeability μs of the spacer 103 as a whole, other desired inductance values and characteristics can be obtained.

A winding for current transformation is applied to a magnetic core with a gap 105 composed of a magnetic core body 104 in which a spacer 103 is inserted into a gap G, and the magnetic core with a gap provided with such a winding is provided. , Can be housed in a case and configured as a CT, that is, a current transformer. C
Also in the case of T, the characteristics are governed by the magnetic characteristics of the magnetic core with gap 105 whose equivalent relative magnetic permeability μs of the spacer 103 as a whole is about 910, and desired characteristics can be obtained. Then, if the equivalent relative permeability μs of the entire spacer 103 in the magnetic core with gap 105 is adjusted, other desired characteristics can be obtained.

The magnetic characteristics of the magnetic core with gap 105 are shown in FIG.
The plate-like insulating material 10 in the spacer 103 shown in FIG.
1 and the thickness tm of the plate-shaped magnetic material 102 =
By adjusting tg-ti and relative permeability μ2,
The desired characteristics can be adjusted while the gap width tg is fixed at a constant size.

The plate-shaped magnetic material 10 in the spacer 103
In general, the magnetic properties of the magnetic material No. 2 are the same as those of the magnetic material constituting the magnetic core body 104 and have the same relative magnetic permeability. , Further fine adjustments can be made.

In the magnetic core with a gap according to the embodiment of the present invention, an insulator having a thickness ti and a thickness tm = tg-ti are provided on a surface cut to a gap width tg of an arbitrary size.
The above magnetic ribbon is inserted. In the magnetic core with a gap in the embodiment according to the present invention, even if the gap width is arbitrary, the required characteristics can be accurately adjusted by adjusting the thickness of the insulator inserted into the gap surface as a spacer and the thickness of the magnetic ribbon. can get.

In this embodiment, the spacer 10
As 3, a single plate-like insulating material 101 a having a thickness ti is used as the insulating member 101, and a plurality of plate-like magnetic materials made of a magnetic ribbon having the same thickness as the plate-like insulating material 101 a are used as the magnetic member 102. Used, the plate-shaped magnetic material 102a,
………, the total thickness of 102i and 102j is tm = tg−
Although the description has been given of the structure in which the ti is set, the insulating member 101 may be formed of a plate-like insulating material composed of a plurality of insulating thin plates that are superposed and stacked on each other. In this case as well, it goes without saying that the total thickness of the plurality of plate-like insulating materials 101a,... Constituting the insulating member 101 may be ti.

The insulating member 1 is used as the spacer 103.
01, a plurality of plate-like insulating materials made of an insulating thin plate are used so that the total thickness of the insulating member 101 is ti;
As the magnetic member 102, a plurality of plate-shaped magnetic materials made of a magnetic ribbon having the same thickness as the insulating thin plate of the plate-shaped insulating material 101 are used, and the total thickness of the plate-shaped magnetic materials 102a,.
In the case where m = tg-ti, the number of plate-like insulating materials 101a,... constituting the insulating member 101 is adjusted within a range of one or more, and the magnetic member 102 is accordingly adjusted. , A plate-shaped magnetic material 102a,.
By adjusting…, in the range of one or more sheets,
The magnetic characteristics of the magnetic core with gap 105 can be adjusted to desired characteristics with high accuracy. Also in this case, the insulating member 10
1 or a plate-like insulating material 1 comprising a plurality of sheets
If the total thickness of 01a,..., Is ti, the total thickness of one or more plate-shaped magnetic materials 102a,. Needless to say, it is necessary to do so.

In this embodiment, the case where the magnetic core body 104 made of an annular laminated body wound with a magnetic ribbon is used has been described. However, the magnetic core body 104 may be formed by a punched magnetic core. The punched magnetic core constituting the magnetic core main body 104 is manufactured by stacking and laminating a number of annular pieces formed by punching a magnetic ribbon and fixing them together.
As in the above-described embodiment, the annular portion thus manufactured is partially cut in the annular portion to form the magnetic core body 104 having the gap G having the gap width tg. Other manufacturing steps and the like are the same as those in the above-described embodiment. A spacer 103 made of a plate-shaped insulating material 101 and a plate-shaped magnetic material 102 is inserted into a gap G of a magnetic core body 104, Magnetic core 10
5 (FIG. 1 (c)).

According to the first embodiment of the present invention, the magnetic core main body 104 made of an annular laminated body formed by winding a magnetic ribbon, or an annular laminated body obtained by laminating thin sheet-shaped punched magnetic cores.
And a gap G formed by cutting the annular laminated body in the magnetic path of the magnetic core body 104, and the end face 1 of the magnetic core body 104 formed by the cut surface of the gap G and constituting the gap G.
A magnetic core 105 with a gap in which spacers 103 are inserted into 04a, 104b, and a plate-like magnetic material 102a,..., 102i, 10 laminated as an insulating member 101 made of a plate-like insulating material 101a as the spacer 103.
A composite material in which a magnetic member 102 made of 2j is superposed and laminated is used, and a plate-like insulating material 101a of the plate-like member 101 and a plate-like magnetic material 1 of the magnetic member 102 in the spacer 103 are used.
Since the spacers 103 were inserted into the gaps G in parallel with the extending directions of 02a,. , Gap width t
It is possible to obtain the magnetic core with gap 105 that can secure necessary characteristics appropriately and accurately with a simple operation while fixing g to an arbitrary size.

Further, according to the first embodiment of the present invention, the magnetic core main body 1 formed by winding a magnetic ribbon into an annular laminated body
04, or a step of forming a magnetic core body 104 made of an annular laminated body by laminating annular pieces formed by punching a magnetic ribbon, and cutting the annular laminated body of the magnetic core body 104 to form a gap. The process of forming G and the plate-like insulating material 101
a of a composite member formed by laminating an insulating member 101 made of a and a magnetic member 102 made of plate-like magnetic materials 102a,..., 102i, 102j laminated on each other, and inserted into the gap G. , And the lamination direction of the plate-shaped insulating material 101a and the plate-shaped magnetic materials 102a,..., 102i, 102j is orthogonal to the magnetic lamination direction of the magnetic core body 104, and the plate-shaped insulating material 101a And the plate-shaped magnetic material 102a,.
The extending direction of 102i, 102j is parallel to the cut surface of the magnetic core body 104, and the insulating member 101 made of a plate-shaped insulating material 101a as the spacer 103 is laminated with the plate-shaped magnetic material 102a,. , 102j, and inserting a composite member obtained by stacking and laminating the magnetic members 102 into the gap G. Therefore, the plate-shaped insulating material 101a and the plate-shaped magnetic materials 102a,.
, 102i, 102j, the extending direction is parallel to the cut surface of the magnetic core body 104, and the insulating member made of the plate-shaped insulating material 101a and the plate-shaped magnetic materials 102a,.
With the easy operation of inserting the composite material as the spacer 103 composed of the magnetic member 102 made of 02j and the gap G into the gap G, the necessary characteristics are appropriately and easily and accurately secured while the gap width tg is fixed to an arbitrary size. A method of manufacturing a magnetic core with a gap can be obtained.

Further, according to the first embodiment of the present invention, the plate-like insulating material 101 constituting the insulating member 101 in the rectangular parallelepiped composite material constituting the spacer 103
The step of adjusting the magnetic characteristics of the magnetic core with gap 105 by adjusting the number of a,... is included in the plate of the composite member including the insulating member 101 and the magnetic member 102 constituting the spacer 103. Insulating material 1
By adjusting the number of 01a, it is possible to obtain a method of manufacturing a magnetic core with a gap that can appropriately and easily secure necessary characteristics with a fixed gap width tg of an arbitrary size.

Embodiment 2 Second Embodiment A second embodiment of the present invention will be described with reference to FIGS. FIG. 2 is a cross-sectional view of the spacer 103 showing a comparison when the insertion position of the insulator made of the plate-shaped insulating material 101 in the spacer 103 is changed. FIG. 3 is a characteristic diagram showing a relationship between the position of the insulator made of the plate-shaped insulating material 101 and the relative magnetic permeability of the spacer 103.

FIG. 2A shows the insulating member 1 in the spacer 103 manufactured by the manufacturing process according to the first embodiment.
01 is a plate-shaped insulating material composed of one insulating thin plate
01a is a plate-shaped magnetic material 102a, which is a magnetic member 102 and is composed of ten laminated magnetic thin plates.
, 102i, 102j in the stacking direction, that is, on the left side in the figure. This is the same as that of the first embodiment shown in FIG.

FIG. 2B shows a plate-like insulating material made of one insulating thin plate constituting the insulating member 101 in the spacer 103 manufactured by the manufacturing process according to the first embodiment. Magnetic member 1 of 101a
02, a plate-like magnetic material 102a,..., 102
The plate-like insulating material 101a is moved from the position of t = 0 shown in FIG.
It has moved to the position of. Here, t is the value shown in FIG.
1A and 1B, a plate-shaped insulating material 101a made of an insulating thin plate and a magnetic member
2, a plate-shaped magnetic material 102a made of a magnetic thin plate,
,..., 102i, and 102j show the positions on the left side in the drawing of both flat surfaces, and show the left side in the drawing of the spacer 103 composed of the insulating member 101 and the magnetic member 102, ie, FIG. Plate-shaped insulating material 1
It is assumed that the left side position of 01a in the figure is t = 0. In addition, tg indicates the width of the gap G (see FIG. 1), and ti indicates the thickness of the plate-shaped insulating material 101a made of an insulating thin plate.

At the position of t = 0 shown in FIG. 2A, an insulating member 101 made of a plate-shaped insulating material 101a and a magnetic member 102 made of plate-shaped magnetic materials 102a,..., 102i, 102j are formed. As shown in FIG. 3, the equivalent relative magnetic permeability μs of the entire spacer 103 is represented by a curve A
And is approximately 910. When the plate-like insulating material 101a of the spacer 103 is moved to the position of t = 2 shown in FIG. 2A, the plate-like insulating material 101a and the plate-like magnetic materials 102a,.
The equivalent relative magnetic permeability μs of the entire spacer 103 made of j is indicated by t = 2 in the curve A, and is about 1030. The plate-shaped magnetic material 102a of the plate-shaped insulating material 101a in the spacer 103,.
The relative position with respect to 102i and 102j is moved, and t is
When t is changed in the range of t = 1 to t = 10, a relative magnetic permeability μs corresponding to this can be obtained.

In this embodiment, the plate-shaped insulating material 101a made of one insulating thin plate and the plate-shaped insulating material 1
, 102 i, 102 i, consisting of ten laminated magnetic thin plates having the same thickness as the insulating thin plate No. 01.
Although the spacer 103 is constituted by 102j, the magnetic thin plates 102a,.
, 102i, 102j, two or three insulating thin plates 101a,... Having the same thickness as one of the thin insulating plates 101a,.
May be reduced to 9 or 8 to form the spacer 103. Curve B in FIG.
Is a plate-shaped insulating material 1 made of an insulating thin plate of the insulating member 101;
01,..., And the relative magnetic permeability μs in the case where the spacer 103 is formed by using two
And the curve C in FIG.
Is a plate-shaped insulating material 1 made of an insulating thin plate of the insulating member 101;
The relative magnetic permeability μs when three spacers 01a,.
, Are shown in correspondence with the left side position t.

As described above, when an arbitrary position of the insulator ti made of the plate-shaped insulating material 101a in the spacer 103 manufactured according to the first embodiment is changed within a gap width tg of an arbitrary dimension of the magnetic core with a gap, Fine adjustment of the characteristics is possible as shown in FIG. 3 (tg = 11, t
i = 1, 2, 3). As a result, it is possible to obtain characteristics that are as close as possible to the desired DC superimposition characteristics.

According to the second embodiment of the present invention, one or a plurality of plate-like insulating materials 101a,... In a rectangular parallelepiped composite material comprising the insulating member 101 and the magnetic member 102 constituting the spacer 103 are provided. , Relative positions of the plurality of plate-like magnetic materials 10
2a,..., So as to include the step of adjusting the magnetic characteristics of the magnetic core with gaps 105. Therefore, the plate-like insulating materials 101a,. By adjusting the relative position of the gap G with respect to the plate-shaped magnetic material 102a, the gap G that can secure necessary characteristics appropriately and easily and accurately with the width tg of the gap G fixed at an arbitrary size. Thus, a method for manufacturing the magnetic core can be obtained.

As described above, according to the embodiment of the present invention, while the gap width tg of the magnetic core 105 with the gap in which the spacer 103 is inserted into the gap G of the magnetic core body 104 is fixed to an arbitrary size, By adjusting the thickness of the insulator and the thickness of the magnetic ribbon to be inserted into the gap surface as 103, necessary characteristics can be obtained, and there is an effect that a highly accurate one can be obtained.

[0049]

According to the first invention, there is provided a magnetic core body made of a magnetic material, and a gap provided in the magnetic core body, and a composite member of an insulating member and a magnetic member inserted into the gap. Since the spacer made of is provided, it is possible to obtain a magnetic core with a gap capable of ensuring necessary characteristics with high accuracy while keeping the gap width at an arbitrary size.

According to the second aspect of the present invention, there is provided a magnetic core body formed of an annular laminated body wound with a magnetic ribbon, and a gap formed by cutting the annular laminated body in a magnetic path of the magnetic core body. This is a magnetic core with a gap in which a spacer is inserted into the cut surface of the above.Since a composite member of an insulating member and a magnetic member is used as the spacer, it is provided on a magnetic core body composed of an annular laminated body wound with a magnetic ribbon. With the spacer made of a composite member of an insulating member and a magnetic member inserted into the gap, a magnetic core with a gap can be obtained in which required characteristics can be secured with high accuracy while keeping the gap width at an arbitrary size.

According to the third aspect of the present invention, a magnetic core body composed of an annular laminated body in which punched magnetic cores are laminated, and a gap formed by cutting the annular laminated body in the magnetic path of the magnetic core body are provided. This is a magnetic core with a gap in which a spacer is inserted into a cut surface, and since a composite member of an insulating member and a magnetic member is used as the spacer, a gap provided in a magnetic core body composed of an annular laminated body in which punched magnetic cores are laminated. The spacer consisting of a composite member of an insulating member and a magnetic member inserted into the
It is possible to obtain a magnetic core with a gap that can ensure required characteristics with high accuracy while keeping the gap width at an arbitrary size.

According to the fourth aspect of the present invention, since the composite member in which the plate-shaped insulating material and the plate-shaped magnetic material are laminated is used as the spacer, the composite member in which the plate-shaped insulating material and the plate-shaped magnetic material are laminated is used. With the spacer, it is possible to obtain a magnetic core with a gap that can ensure necessary characteristics with high precision while keeping the gap width at an arbitrary size.

According to the fifth aspect of the present invention, a composite member in which a plate-shaped insulating material and a plate-shaped magnetic material are laminated is used as a spacer, and the extending direction of the plate-shaped insulating material and the plate-shaped magnetic material is changed by the gap. Since the composite member is arranged in parallel with the end face of the magnetic core body to be configured, the extending direction of the plate-shaped insulating material and the plate-shaped magnetic material is parallel to the end face of the magnetic core body that forms the gap. With the spacer made of the composite member described above, it is possible to obtain a magnetic core with a gap that can ensure necessary characteristics with high accuracy while keeping the gap width at an arbitrary size.

According to the sixth aspect, a composite member in which a plate-shaped insulating material and a plate-shaped magnetic material are laminated is used as a spacer, and the extending direction of the plate-shaped insulating material and the plate-shaped magnetic material is set to be equal to the gap. Since the composite member is arranged parallel to the cut surface, the spacer is made of a composite member in which the extending direction of the plate-shaped insulating material and the plate-shaped magnetic material is parallel to the cut surface of the gap. It is possible to obtain a magnetic core with a gap which can ensure necessary characteristics with high accuracy while keeping the gap width at an arbitrary size.

According to the seventh aspect, a composite member in which a plate-shaped insulating material and a plate-shaped magnetic material are laminated is used as a spacer, and the laminating direction of the plate-shaped insulating material and the plate-shaped magnetic material is changed to the magnetic core body. Since the composite member is arranged orthogonal to the lamination direction of the magnetic core body, the gap formed by the composite member having the lamination direction of the plate-shaped insulating material and the plate-shaped magnetic material perpendicular to the lamination direction of the magnetic core body is formed. It is possible to obtain a magnetic core with a gap that can ensure necessary characteristics with high precision while keeping the width at an arbitrary size.

According to the eighth aspect of the present invention, since the magnetic core body provided with the spacers in the gaps is formed as an inductor in which a coil is wound in a case, necessary characteristics can be obtained while keeping the gap width at an arbitrary size. It is possible to obtain an inductor composed of a magnetic core with a gap that can be secured with high accuracy.

According to the ninth aspect of the present invention, the magnetic core main body having the spacers provided in the gaps is configured as a current transformer in which a coil is wound in a case, so that it is necessary to keep the gap width at an arbitrary size. It is possible to obtain a current transformer constituted by a magnetic core with a gap capable of ensuring characteristics with high accuracy.

According to the tenth aspect, there is provided a step of providing a gap in the magnetic core main body, and adjusting a dimension of a composite member obtained by laminating a plate-shaped insulating material and a plate-shaped magnetic material to constitute a spacer inserted into the gap. And the step of inserting the composite member as a spacer into the gap, so that the spacer is appropriately inserted into the gap by adjusting the dimensions of the composite member as the spacer, and the gap width is set to an arbitrary size by an easy operation. It is possible to obtain a method for manufacturing a magnetic core with a gap, which can ensure necessary characteristics with high accuracy.

According to the eleventh aspect, the step of providing a gap in the magnetic core main body and the dimension in the laminating direction of the composite member obtained by laminating the plate-shaped insulating material and the plate-shaped magnetic material are adjusted according to the width of the gap. And configuring the spacer as a spacer to be inserted into the gap, the composite member as a spacer,
By adapting the dimension in the stacking direction to the width of the gap,
Inserting the spacer into the gap by adjusting the dimension of the composite member as a spacer in the laminating direction, and easily adjusting the required characteristics while keeping the gap width at an arbitrary size by an easy operation. It is possible to obtain a method of manufacturing a magnetic core with a gap that can be secured well.

According to the twelfth aspect, a step of forming a magnetic core body composed of a laminated body by laminating magnetic bodies, a step of forming a pair of end faces forming a gap in the magnetic core body, Adjusting the dimensions of a composite member formed by laminating a plate-shaped insulating material and a plate-shaped magnetic material to form a spacer to be inserted into the gap; and setting the extending direction of the plate-shaped insulating material and the plate-shaped magnetic material to the magnetic core. Inserting the composite member into the gap in parallel with the end surface of the main body,
By making the extending direction of the plate-shaped insulating material and the plate-shaped magnetic material parallel to the end face of the magnetic core body and inserting the composite member into the gap, the gap width was set to an arbitrary size by an easy operation. It is possible to obtain a method for manufacturing a magnetic core with a gap, which can ensure necessary characteristics with high accuracy.

According to the thirteenth aspect, a step of forming a magnetic core body made of a laminated body by laminating magnetic materials, a step of forming a gap in the magnetic core body, a step of forming a plate-shaped insulating material and a plate-shaped magnetic material. Adjusting the dimensions of the composite member obtained by laminating the material and configuring the spacer as a spacer to be inserted into the gap; and making the laminating direction of the plate-shaped insulating material and the plate-shaped magnetic material perpendicular to the magnetic laminating direction of the magnetic core body. And the step of inserting the composite member into the gap, so that the laminating direction of the plate-shaped insulating material and the plate-shaped magnetic material is orthogonal to the magnetic laminating direction of the magnetic core body, By inserting the composite member into the gap, it is possible to obtain a method of manufacturing a magnetic core with a gap that can ensure required characteristics with high precision while maintaining a desired gap width by an easy operation.

According to the fourteenth aspect, a step of winding a magnetic ribbon to form a magnetic core body composed of an annular laminated body, and a step of cutting the annular laminated body of the magnetic core body to form a gap. Adjusting the dimensions of a composite member formed by laminating a plate-shaped insulating material and a plate-shaped magnetic material to form a spacer to be inserted into the gap, and setting the extending direction of the plate-shaped insulating material and the plate-shaped magnetic material to Parallel to the cut surface of the magnetic core body,
Inserting the composite member into the gap so that the extending direction of the plate-shaped insulating material and the plate-shaped magnetic material is parallel to the cut surface of the magnetic core body, and inserting the composite member into the gap. By doing so, it is possible to obtain a method of manufacturing a magnetic core with a gap, which can ensure necessary characteristics with high precision while maintaining the gap width at an arbitrary size by an easy operation.

According to the fifteenth aspect, a step of laminating the punched magnetic cores to form a magnetic core body composed of an annular laminated body;
A step of forming a gap by cutting the annular laminated body of the magnetic core body, and a step of adjusting a dimension of a composite member obtained by laminating a plate-shaped insulating material and a plate-shaped magnetic material to form a spacer inserted into the gap And a step of inserting the composite member into the gap with the extending direction of the plate-shaped insulating material and the plate-shaped magnetic material being parallel to the cut surface of the magnetic core main body. By making the extending direction of the plate-shaped magnetic material parallel to the cut surface of the magnetic core body and inserting the composite member into the gap, it is possible to easily perform the required characteristics while keeping the gap width at an arbitrary size by an easy operation. A method of manufacturing a magnetic core with a gap that can be ensured with high accuracy can be obtained.

According to the sixteenth aspect, the method includes the step of adjusting the magnetic characteristics of the magnetic core with the gap by adjusting the number of plate-shaped insulating materials and the number of plate-shaped magnetic materials in the composite member constituting the spacer. By adjusting the number of plate-shaped insulating materials and plate-shaped magnetic materials, it is possible to obtain a method of manufacturing a magnetic core with a gap that can ensure necessary characteristics with high accuracy while keeping the gap width at an arbitrary size.

According to the seventeenth aspect, since the step of adjusting the relative position of the plate-like insulating material with respect to the plate-like magnetic material in the composite member forming the spacer is included, the step of adjusting the magnetic characteristics of the magnetic core with a gap is included. By adjusting the relative position of the plate-shaped insulating material with respect to the plate-shaped magnetic material, it is possible to obtain a method of manufacturing a magnetic core with a gap that can ensure required characteristics with high accuracy while keeping the gap width at an arbitrary size.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a manufacturing process of a magnetic core with a gap in an embodiment according to the present invention.

FIG. 2 is a cross-sectional view of a spacer showing a comparison when an insertion position of an insulator made of a plate-like insulating material is changed in an embodiment according to the present invention.

FIG. 3 is a characteristic diagram showing a relationship between a position t of an insulator made of a plate-shaped insulating material and a relative magnetic permeability in an embodiment according to the present invention.

[Explanation of symbols]

Reference Signs List 101 Insulating member made of plate-shaped insulating material, 102 Magnetic member made of plate-shaped magnetic material, 103 Spacer made of composite member, 104 Core body, G gap, 105
Magnetic core with gap.

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) H01F 41/02 H01F 27/24 A 40/06 (72) Inventor Yoshihiro Horiuchi 1-1-57 Miyashita 1-chome Miyashita Sagamihara City, Kanagawa Prefecture (72) Inventor Shiro Tsukada 1-57, Miyashita 1-chome, Sagamihara-shi, Kanagawa F term (reference) 5E062 AA10 AB20 AC20 5E081 AA05 BB10 CC01 DD05 DD17 EE07 EE11 FF01

Claims (17)

[Claims] 1. A magnetic core body made of a magnetic material, and a gap provided in the magnetic core body, and a spacer made of a composite member of an insulating member and a magnetic member inserted into the gap is provided. Magnetic core with gap. 2. A magnetic core body comprising an annular laminate wound with a magnetic ribbon, a gap formed by cutting the annular laminate in a magnetic path of the magnetic core body, and a spacer provided on a cut surface of the gap. An inserted magnetic core with a gap, wherein a composite member of an insulating member and a magnetic member is used as the spacer. 3. A magnetic core body composed of an annular laminated body in which punched magnetic cores are laminated, a gap formed by cutting the annular laminated body in a magnetic path of the magnetic core body, and a spacer inserted into a cut surface of the gap. A magnetic core with a gap, wherein a composite member of an insulating member and a magnetic member is used as the spacer. 4. The magnetic core with a gap according to claim 1, wherein a composite member obtained by laminating a plate-shaped insulating material and a plate-shaped magnetic material is used as the spacer. 5. A composite member in which a plate-shaped insulating material and a plate-shaped magnetic material are laminated as a spacer, and a direction in which the plate-shaped insulating material and the plate-shaped magnetic material extend is defined by a length of the magnetic core body constituting the gap. 2. The magnetic core with a gap according to claim 1, wherein the composite member is arranged in parallel with an end face. 6. A composite member in which a plate-shaped insulating material and a plate-shaped magnetic material are laminated as a spacer, and a direction in which the plate-shaped insulating material and the plate-shaped magnetic material extend is parallel to a cut surface of the gap. The magnetic core with a gap according to claim 2 or 3, wherein the composite member is provided. 7. A composite member in which a plate-shaped insulating material and a plate-shaped magnetic material are laminated as a spacer, and a laminating direction of the plate-shaped insulating material and the plate-shaped magnetic material is orthogonal to a laminating direction of the magnetic core body. The magnetic core with a gap according to claim 2 or 3, wherein the composite member is disposed by using the magnetic member. 8. The magnet with a gap according to claim 1, wherein the magnetic core body having a spacer provided in the gap is placed in a case and configured as an inductor which is wound. core. 9. The gap according to claim 1, wherein the magnetic core body having a spacer provided in the gap is placed in a case and configured as a current transformer having a winding. With magnetic core. Providing a gap in the magnetic core body;
Adjusting the dimensions of a composite member obtained by laminating a plate-shaped insulating material and a plate-shaped magnetic material to form a spacer inserted into the gap; and inserting the composite member as a spacer into the gap. The manufacturing method of the magnetic core with a gap characterized by the above-mentioned. Providing a gap in the core body;
A step of adjusting the dimension in the laminating direction of the composite member obtained by laminating the plate-shaped insulating material and the plate-shaped magnetic material in accordance with the width of the gap to constitute a spacer inserted into the gap,
Inserting the composite member as a spacer into the gap with its dimension in the stacking direction adapted to the width of the gap. 12. A step of forming a magnetic core body composed of a laminated body by laminating magnetic bodies, a step of forming a pair of end faces forming a gap in the magnetic core body, and a step of forming a plate-shaped insulating material and a plate-shaped insulating material. Adjusting the dimensions of the composite member obtained by laminating the magnetic material and configuring the composite member as a spacer to be inserted into the gap; and making the extending direction of the plate-shaped insulating material and the plate-shaped magnetic material parallel to the end face of the magnetic core body. Inserting the composite member into the gap. 13. A composite comprising a step of forming a magnetic core body composed of a laminated body by laminating magnetic bodies, a step of forming a gap in the magnetic core body, and a step of laminating a plate-shaped insulating material and a plate-shaped magnetic material. Adjusting the dimensions of the members and configuring them as spacers to be inserted into the gaps, and setting the laminating direction of the plate-shaped insulating material and the plate-shaped magnetic material to be perpendicular to the magnetic laminating direction of the magnetic core body, Inserting a composite member into the gap. 14. A step of winding a magnetic thin ribbon to form a magnetic core body composed of an annular laminated body, a step of cutting the annular laminated body of the magnetic core body to form a gap, Adjusting the dimensions of the composite member formed by laminating the plate-shaped magnetic material and configuring the spacer as a spacer to be inserted into the gap; and setting the extending direction of the plate-shaped insulating material and the plate-shaped magnetic material to a cut surface of the magnetic core body. Inserting the composite member into the gap in parallel with the magnetic core. 15. A step of forming a magnetic core body composed of an annular laminated body by laminating punched magnetic cores; a step of forming a gap by cutting the annular laminated body of the magnetic core body; Adjusting the dimensions of the composite member formed by laminating the plate-shaped magnetic material and configuring the spacer as a spacer to be inserted into the gap; and setting the extending direction of the plate-shaped insulating material and the plate-shaped magnetic material to a cut surface of the magnetic core body. Inserting the composite member into the gap in parallel with the magnetic core. 16. The method according to claim 10, further comprising the step of adjusting the magnetic characteristics of the magnetic core with a gap by adjusting the number of plate-shaped insulating materials and plate-shaped magnetic materials in the composite member forming the spacer. A method for manufacturing a magnetic core with a gap according to any one of claims 15 to 15. 17. The method as claimed in claim 17, further comprising the step of adjusting the relative position of the plate-like insulating material with respect to the plate-like magnetic material in the composite member forming the spacer to adjust the magnetic characteristics of the magnetic core with a gap. A method for manufacturing a magnetic core with a gap according to any one of claims 10 to 15.