CN101091227B

CN101091227B - Core having insulating sheet and electric device provided with such core

Info

Publication number: CN101091227B
Application number: CN200680000040XA
Authority: CN
Inventors: 田畑芳行; 高见良一; 岛林信介
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 2005-10-05
Filing date: 2006-02-23
Publication date: 2010-08-25
Anticipated expiration: 2026-02-23
Also published as: CN101091227A; WO2007039939A1; JPWO2007039939A1; JP4325673B2

Abstract

In a core having an insulating sheet and an electric device provided with such core, a bobbin is inserted into one section of the core which is composed of at least two sections, and at the same time, a substantially strip-like insulating sheet bent in substantially T shape or L shape is inserted. An unbent portion of the insulating sheet is arranged along the surface of the core. The other section of the core is inserted into the bobbin to have the bent portion of the insulating sheet sandwiched with the facing portions of the core.

Description

Magnetic core and electric equipment with this magnetic core

Technical field

The present invention relates generally to magnetic core and has the electric equipments such as transformer of this magnetic core.

Background technology

The formation of one iron core is described and has this transformer unshakable in one's determination formation that referring now to Figure 12 to Figure 14 this iron core is an example of magnetic core in the past.Among Figure 12, when form constituting the air gap 10 (below be called gap 10) of the E font iron core 9 of transformer, when making 9 butt joints unshakable in one's determination of 1 group of E font by both contacted part central portions are carried out cut, and form the non-touching to each other formation of its central portion, form gap 10.

In addition,, use as shown in figure 13 under the situation of U font iron core 1, by clearance material 11 is inserted the docking site of the one group of U font iron core 1 that faces one another, and this clearance material 11 is attached on both sides' the U font iron core 1 and forms the gap as another example.In addition, can perhaps use the clearance material 12 that has with clearance material 11 different qualities, change characteristic as transformer by changing the thickness of the clearance material 11 that inserts.

In addition, as another example, known forming as shown in figure 14 inserted circular unshakable in one's determination 13 this formation in position, gap with several

pieces clearance materials

14 or 15, changes the characteristic (reference example such as Ri Bente Open 2002-75747 communique) of transformer by the combination of this

clearance material

14,15.

But above-mentioned existing iron core and having in this transformer unshakable in one's determination, described problem below aspect the formation of gap, existing.

Among Figure 12,, when being combined, one group of E font iron core 9 forms gap 10 by E font iron core 9 is carried out cut.Thereby extremely difficulty is carried out the size that cut changes gap 10 to iron core when the assembling transformer.And, the transformer of small lot batch manufacture is changed under the situation of gap 10 kinds, need carry out separately design alteration so that self design of E font iron core 9 conforms to all gaps 10.Therefore existing problems aspect shared, cost.

In addition, in the example with U font iron core 1 shown in Figure 13, can when making transformer, be disposed at U font iron core 1 contact-making surface to each other, change the gap material thickness of 1 unshakable in one's determination of U font by transposing clearance material 11,12.But in order to change the thickness of clearance material 11, must prepare the multiple clearance material 12 that self thickness of material is changed in advance.

In addition, in circular unshakable in one's determination 13 example shown in Figure 14, can change the characteristic of transformer by the material that changes several

pieces clearance materials

14,15 that insert.But, must prepare the different clearance material of multifrequency nature in advance in order to change the characteristic of transformer.

In sum, existing iron core and transformer, except the number of packages of clearance material, kind increased, what need also that fixing a plurality of clearance materials use mounted operation etc., and assembling procedure number, component costs can increase.

Have again, in U font iron core 1 shown in Figure 13, circular unshakable in one's determination 13 the example shown in Figure 14, when the assembling transformer, cover under each clearance material situation on every side with this parts of bobbin that form coil, can't confirm whether to have inserted clearance material in appearance after the transformer assembling.So, finish transformer assembling after, this transformer group is installed in the product, the characteristic of product to be confirmed just begins can confirm not put into clearance material.And because the characteristic of product fails to have found to forget to put under the situation of clearance material, product just might circulate on market like this.

Summary of the invention

Magnetic core of the present invention comprises at least 2 magnetic core parts of relative configuration; Have the bending part and the insulating trip of the band shape of bending part not, the dogleg section of described insulating trip (below be called bending part) is sandwiched between 2 described magnetic cores parts forms the gap, the not dogleg section of described insulating trip (below be called not bending part) is along the surface configuration of magnetic core part.In addition, insulating trip is to be bent into the roughly banded of approximate T word shape or approximate L word shape or at least two roughly band shapes that are bent into the approximate L word shape that faces with each other.

According to magnetic core of the present invention, can not change the shape of magnetic core because of the kind of electric equipment, more needn't lean on the thickness of clearance material, material to change self gap.In addition, can suppress assembling procedure number, component costs to preventing to forget that putting into clearance material confirms, and the stability that improves the quality.

Description of drawings

Fig. 1 is the outside drawing of the U font iron core in the embodiment of the present invention 1;

Fig. 2 is the assembly drawing of the unshakable in one's determination and bobbin of banded sheet in the embodiment of the present invention 1 and U font;

Fig. 3 is the outside drawing of the banded sheet in the embodiment of the present invention 1;

Fig. 4 illustrates banded sheet in the embodiment of the present invention 1 and the U font is unshakable in one's determination and the outside drawing of the assembled state of bobbin;

Fig. 5 is the outside drawing that the state of the banded sheet bending 2 times in the embodiment of the present invention 2 is shown;

Fig. 6 is the outside drawing of the banded sheet in the embodiment of the present invention 3;

Fig. 7 is the assembly drawing of the unshakable in one's determination and bobbin of banded sheet in the embodiment of the present invention 3 and U font;

Fig. 8 illustrates banded sheet in the embodiment of the present invention 3 and the U font is unshakable in one's determination and the outside drawing of the assembled state of bobbin;

Fig. 9 is the outside drawing of the banded sheet in the embodiment of the present invention 4;

Figure 10 is the assembly drawing of the unshakable in one's determination and bobbin of banded sheet in the embodiment of the present invention 4 and U font;

Figure 11 illustrates banded sheet in the embodiment of the present invention 4 and the U font is unshakable in one's determination and the outside drawing of the assembled state of bobbin;

Figure 12 is the outside drawing of existing E font iron core;

Figure 13 changes the schematic diagram of usefulness for the gap material thickness of the existing U font iron core of explanation;

Figure 14 changes the schematic diagram of usefulness for the existing circular clearance material unshakable in one's determination of explanation.

The drawing reference numeral explanation

1 U font iron core

2 banded sheets

3A V-shape bending part

3B is bending part not

4 bobbins

5 coil terminals

6 legs

7 bolts

The continuous V-shape bending part of 8A

8B is bending part not

9 E font iron cores

10 air gaps

11,12 clearance materials

13 is circular unshakable in one's determination

14,15 clearance materials

16 banded sheets

17A L font bending part

17B is bending part not

Embodiment

(execution mode 1)

With Fig. 1 to Fig. 4 embodiments of the present invention 1 are described below.Fig. 1 is the outside drawing of formation as 1 group of U font iron core 1 of the iron core of an example of magnetic core.Fig. 2 is the key diagram that is used to illustrate the formation in gap unshakable in one's determination, described iron core comprises: going out outside coil terminals 5 has under the situation that the mechanical force from the outside adds, might coil terminals 5 and U font iron core 1 contact, but can utilize banded sheet 16 to make coil terminals 5 and U font iron core 1 electric insulation between the two.

In addition, as shown in figure 11,, thereby when installing to transformer group in the product, can whether be inserted into the gap material of the banded sheet 16 of visual confirmation because the outside of bobbin 4 has the banded sheet 16 that exposes to exist.

As mentioned above, according to present embodiment 4, as shown in figure 10, banded sheet 16 needn't mount operation and just can fix very naturally, is the operation that mounts of gap material so do not need to carry out the L font bending part 17A of banded sheet 16.

And, as shown in figure 10, can remain and avoid banded sheet 16 to stagger, thereby can stablize that to keep the L font bending part 17A of banded sheet 16 be the thickness of gap material with respect to the butted part of U font iron core 1.

In addition, as shown in figure 11, can utilize banded sheet 16 to make coil terminals 5 and U font iron core 1 electric insulation between the two, thereby accident such as can prevent to leak electricity constitute safer transformer.

And, as shown in figure 11, for can whether having inserted this structure of gap material of banded sheet 16, thereby can prevent to forget and put into the gap material with visual confirmation.

In addition, in above-mentioned execution mode 3 and the execution mode 4, also can manage the L font bending part 17A of banded sheet 16 is bent into continuous V-shape.By carrying out like this, change bending times, just can form the gap material of all thickness.

And above-mentioned execution mode 1 also can be managed banded sheet 2 or the use stacked together of banded sheet 16 multi-discs to execution mode 4.Carry out like this, just can be by changing the size that stacked sheet number changes the gap easily.In addition, can be by the degree of freedom that adopts different banded sheet 2 of thickness separately or banded sheet 16 to increase formed gap size.

In addition, above-mentioned execution mode 1 to the execution mode 4 explanation be the example situation promptly unshakable in one's determination that adopts magnetic core, but magnetic core is not limited to iron core, the material that has magnetic with the FERRITE CORE known to adopting usually etc. is advisable.

In addition, above-mentioned execution mode 1 to the execution mode 4 explanation be that to adopt an example of electric equipment be the situation of transformer, but electric equipment is not limited to transformer, can be applied to the equipment that reactor for example etc. has magnetic core and coil.

The industry practicality

Magnetic core and electrical equipment with insulation sheet of the present invention can mount operation to the gap material, reduces to mount the operation process number, and prevents from forgetting and put into the gap material, gives an example, and can use as device assembles with magnetic core and electrical equipment.

Claims

1. a magnetic core is characterized in that, comprising:

At least 2 magnetic core parts of relative configuration;

Have the bending part and the insulating trip of the band shape of bending part not,

The described bending part of described insulating trip is sandwiched between 2 described magnetic cores parts forms the gap,

The described not bending part of described insulating trip is along the surface configuration of described magnetic core part.

2. magnetic core as claimed in claim 1 is characterized in that,

Described insulating trip is the band shape that is bent into the T word shape.

3. magnetic core as claimed in claim 1 is characterized in that,

Described insulating trip is the band shape that is bent into the L word shape.

4. magnetic core as claimed in claim 1 is characterized in that,

Described insulating trip is at least 2 band shapes that are bent into the L word shape that face with each other.

5. magnetic core as claimed in claim 1 is characterized in that,

The bending part of described insulating trip is by bending continuously.

6. magnetic core as claimed in claim 1 is characterized in that,

Described gap forms stacked being sandwiched between described at least 2 magnetic cores part of described insulating trip multi-disc.

7. an electric equipment is characterized in that, comprising:

Bobbin;

Insert the magnetic core as claimed in claim 1 of described bobbin; And

Be wound on the coil on the described bobbin,

At least a portion of the not bending part of described insulating trip is to constitute between the two along described bobbin and described magnetic core surface partly.

8. electric equipment as claimed in claim 7 is characterized in that,

The bending part of described insulating trip is by bending continuously.

9. electric equipment as claimed in claim 7 is characterized in that,

10. electric equipment as claimed in claim 8 is characterized in that,

11. electric equipment as claimed in claim 7 is characterized in that,

The length that makes the total length of the not bending part of described insulating trip be longer than coil.

12. electric equipment as claimed in claim 7 is characterized in that,

The length that makes the total length of the not bending part of described insulating trip be longer than described bobbin.

13. electric equipment as claimed in claim 7 is characterized in that,

The not bending part of described insulating trip is disposed at described magnetic core part and described coil between the two, makes described magnetic core partly insulate with described coil between the two.