CN102007554A

CN102007554A - Transformer and transformer assembly method

Info

Publication number: CN102007554A
Application number: CN2010800013571A
Authority: CN
Inventors: 田畑芳行; 大崎宪和
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 2009-02-25
Filing date: 2010-02-16
Publication date: 2011-04-06
Anticipated expiration: 2030-02-16
Also published as: CN102007554B; JPWO2010098029A1; WO2010098029A1; JP5177231B2

Abstract

A smaller and thinner transformer can be realized by wrapping a first secondary winding (5) so that a gap (5a) larger than the gauge of the first secondary winding (5) is formed between adjacent wraps of the first secondary winding (5), and so that two coils (A, B) are disposed in a structure in which the wraps of a second secondary winding (10) of one coil (B) are disposed between the wraps of the first secondary winding (5) of the other coil (A).

Description

The assemble method of transformer and transformer

Technical field

The present invention relates to the transformer of a kind of lift-launch on electric equipments such as arc welder and the assemble method of transformer.

Background technology

In recent years, the digitlization of popular electric equipment and the miniaturization of framework, no exception as the arc welder of an example of electric equipment.

Because hundreds of amperes big electric current flows through the secondary winding of the transformer coil that is used for arc welder, so be difficult to reduce the sectional area of secondary winding.Therefore, utilize the method secondary winding being cut apart and reel side by side or with paper tinsel or copper coin overlapping method side by side, the sectional area that increases secondary winding is with the big electric current of correspondence.

Like this, owing to must increase the sectional area of secondary winding in arc welder, this becomes the main cause that hinders the transformer miniaturization.In addition, also there is limit for miniaturization, even make the iron core miniaturization, as long as can not reduce the sectional area of secondary winding by forming ferrite core etc., just be difficult to realize the miniaturization of transformer integral body, thereby also be difficult to realize the miniaturization of the framework of arc welder.

As an example of in the past transformer, as shown in Figure 4, be well known that the reactance coil or the transformer 17 (for example with reference to patent documentation 1) of " mouth " font that constitutes relatively by two

coil

16a, 16b that make coiling.In this transformer 17, relative two

coil

16a, 16b are approaching each other.

Yet in transformer in the past 17 as shown in Figure 4, the sectional area (highly, width) that has increased the secondary winding 18a, the 18b that constitute

coil

16a, 16b is with the big electric current of correspondence.Therefore, when constituting the transformer 17 of big electric current, it is big that the height of

coil

16a, 16b (rolling up thick direction) becomes, and

relative coil

16a, 16b collide each other.So, the space (window) that must increase iron core 19.

Therefore, for the transformer of the big electric current of correspondence, exist for the space of guaranteeing necessary iron core 19 and the problem that transformer maximized and the framework of accommodating transformer 17 is also maximized.

Patent documentation 1: TOHKEMY 2007-173700 communique

Summary of the invention

The invention provides a kind of transformer that can realize miniaturization or slimming.

The invention provides a kind of transformer, possess two coils and two iron cores, wherein, coil possesses: bobbin; First winding of on bobbin, reeling; Second winding of on first winding, reeling across insulant, two coil configuration are, between the second adjacent winding, separate second winding of reeling greater than the interval of the thickness of second winding, and between second winding of a coil second winding of another coil of configuration.

In addition, the invention provides a kind of assemble method of transformer, transformer possesses two coils and two iron cores, in the assemble method of transformer, comprise the steps: behind first winding of reeling on the bobbin, across insulant on first winding between the second adjacent winding, separating greater than the mode at the interval of the thickness of second winding second winding of reeling, thereby obtain the step of two coils; Dispose the step of two coils in the mode of second winding of another coil of configuration between second winding of a coil; Two iron cores are inserted the step of hollow space of the inboard of two bobbins respectively.

According to described structure, the mode that is configured in the recess that second winding of not reeling between second winding of another coil forms owing to the protuberance that forms with coiling second winding with a coil disposes two coils, so can realize miniaturization, the slimming of transformer.

Description of drawings

Figure 1A is the front view of general configuration of the transformer of expression embodiments of the present invention 1.

Figure 1B is the upward view of the general configuration of this transformer of expression.

Fig. 2 A is the front view of general configuration of the transformer of expression embodiments of the present invention 2.

Fig. 2 B is the upward view of the general configuration of this transformer of expression.

Fig. 3 A is the front view of general configuration of the transformer of expression embodiments of the present invention 3.

Fig. 3 B is the upward view of the general configuration of this transformer of expression.

Fig. 4 is the figure that represents the general configuration of transformer in the past.

Symbol description

1 iron core

2 first bobbins

3 first elementary windings

4,6,9,11,12,13 insulating parts

5 first secondary winding

5a, 10a are at interval

5b, 10b protuberance

5c, 10c recess

7 second bobbins

8 second elementary windings

10 second subprime windings

14 casting insulation materials

20,30,40 transformers

Embodiment

(execution mode 1)

Use Figure 1A, Figure 1B that the transformer of present embodiment is described.Figure 1A is the front view of the general configuration of indication transformer, and Figure 1B is the upward view of the general configuration of this transformer of expression.Transformer 20 shown in Figure 1A, Figure 1B is made of iron core 1 and two loop A, B.And, a loop A among two loop A, the B by first bobbin 2 with the hollow space that can insert iron core 1, be wound on the first elementary winding (first winding) 3 on first bobbin 2, first secondary winding (second winding) 5 that is wound on the first elementary winding 3 across insulating part 4 constitutes.

In addition, another coil B by second bobbin 7 with the hollow space that can insert iron core 1, be wound on the second elementary winding (first winding) 8 on second bobbin 7, the second subprime winding (second winding) 10 that is wound on the second elementary winding 8 across insulating part 9 constitutes.Between a loop A and another coil B, be provided with insulating part 6 and insulating part 11.Need to prove,, can list Nomex (Nomex nylon) sheet (ノ one メ Star Network スシ one ト) (registered trade mark of E.I.Du Pont Company) etc. as the example of insulating part 6, insulating part 11.

And, iron core 1 can constitute by being divided into roughly " ∏ " font two parts of (comprising " ∏ " font) (part up and down among Figure 1A), and so that these two parts constitute iron core 1 in the mode of the inside of the hollow space of first bobbin 2 and second bobbin 7 butt joint.In addition, iron core 1 also can by " コ " font roughly and roughly these two parts of " I " font (comprising " I " font) constitute, and with will be roughly the part of " コ " font pass first bobbin 2 and second bobbin 7 and the mode of docking with the part of " I " font roughly constitutes iron core 1.

Below, the assemble method of the transformer of formation in the above described manner is described.With first elementary winding 3 single-row being wound on first bobbin 2.Finish the first elementary winding 3 back fixed insulation spares 4 of reeling.Then, separate greater than the interval 5a of the thickness of first secondary winding 5 and equally spaced with first secondary winding, 5 single-row being wound on the insulating part 4.With it as first loop A.

In addition, with second elementary winding 8 single-row being wound on second bobbin 7.Finish the second elementary winding 8 back fixed insulation spares 9 of reeling.Then, separate greater than the interval 10a of the thickness of second subprime winding 10 and equally spaced with second subprime winding 10 single-row being wound on the insulating part 9.With it as the second coil B.

And on first loop A and the second coil B, the position that is wound with secondary winding 5,10 becomes

protuberance

5b, 10b, and the position (adjacent secondary winding 5 to each other, secondary winding 10 to each other) that is not wound with secondary winding 5,10 becomes recess 5c, 10c.And the bottom of

recess

5c, 10c is provided with insulating part 4 or insulating part 9.

Then, dispose first loop A and the second coil B as follows, promptly, constitute the equally spaced protuberance 5b (first secondary winding 5) of first secondary winding 5 of first loop A in the equally spaced recess 10c (10 of adjacent second subprime windings) of the second subprime winding 10 that constitutes second coil B configuration, and, constitute the equally spaced protuberance 10b (second subprime winding 10) of the second subprime winding 10 of the second coil B in the equally spaced recess 5c (5 of the first adjacent secondary winding) of first secondary winding 5 that constitutes first loop A configuration.

In addition, the second subprime winding 10 opposed opposed portions with constituting the second coil B at first secondary winding 5 that constitutes first loop A dispose insulating part 6.Insulating part 6 has the effect that makes insulation between first secondary winding 5 and the second subprime winding 10.It is shaped as sheet, and has along the folding line of the shape of jog 5b, the 5c of first secondary winding 5.

In addition, first secondary winding, the 5 opposed opposed portions with constituting first loop A at the second subprime winding 10 that constitutes the second coil B dispose insulating part 11.Insulating part 11 has the effect that makes insulation between the second subprime winding 10 and first secondary winding 5.It is shaped as sheet, and has along the folding line of the shape of jog 10b, the 10c of second subprime winding 10.

That is, the protuberance 5b that forms at first secondary winding 5 of the coiling on the loop A be configured on another coil B do not reel second subprime winding 10 and the position of the recess 10c that forms disposes insulating part 6.In addition, the protuberance 10b that forms at first secondary winding 10 of the coiling on another coil B be configured on the loop A do not reel second subprime winding 5 and the position of the recess 5c that forms disposes insulating part 11.In the present embodiment, though use two

insulating parts

6,11 to be illustrated, also can use an insulating part.

Then, under the state that has disposed first loop A and the second coil B in the above-described manner, be divided into two-part iron core 1 in the hollow space butt joint with being divided into the inboard that two-part iron core 1 inserts the hollow space of first bobbin 2 and second bobbin 7, making, and bonding docking section.

Be divided into two-part iron core 1 fixedly be not limited to utilize the fixing of bonding agent, as fixing means, also can consider based on the fixing of the combination of screw, nut and metal parts or based on the whole bag of tricks such as fixing of fixed band.

In addition, the shape of winding can be circle line, rectangular wire, twisted wire etc., so long as not paper tinsel shape, its cross section no matter for which kind of shape can, and winding also can not be one, but is provided with two, three etc. many side by side.

As mentioned above,, the space be can effectively utilize, miniaturization, the slimming of transformer realized according to the transformer of present embodiment.

In addition, because

secondary winding

5,10 basic configuration are on the surface of transformer 20, so can expect air cooling cooling effect based on cooling fan etc.

Like this, according to present embodiment, can realize the transformer of the good and miniaturization of cooling effectiveness, slimming.

(execution mode 2)

In the present embodiment, for the structure mark identical symbol identical, and omit explanation to it with execution mode 1.And the difference of execution mode 1 is the shape of the insulating part that is provided with between first loop A and the second coil B.

Below, use Fig. 2 A and Fig. 2 B that the transformer of present embodiment is described.In the transformer 30 of Fig. 2 A and Fig. 2 B, structure and the configuration of first loop A and the second coil B are identical with execution mode 1.Between first loop A and the second coil B, be provided with insulating part 12 and insulating part 13.

Insulating part 12 has first secondary winding 5 and the effects 10 opposed opposed the insulation of second subprime winding of making, and it is shaped as sheet and does not have folding line.Insulating part 13 has second subprime winding 10 and the effects 5 opposed opposed the insulation of first secondary winding of making, and it is shaped as sheet and does not have folding line.

Need to prove that the state of the assembling of iron core 1 and structure, winding etc. are identical with execution mode 1.In addition, the example as insulating part 12 and insulating part 13 can list Nomex (Nomex nylon) sheet etc.

In the present embodiment, by between first loop A and the second coil B, sandwiching the

insulating part

12,13 that does not have folding line, jog 10b, the 10c of the second subprime winding 10 of jog 5b, the 5c of first secondary winding 5 of insulating part 12 and insulating part 13 and first loop A and the second coil B are extended matchingly.

As mentioned above, according to present embodiment, can realize the effect identical with execution mode 1.In the present embodiment, though use two

insulating parts

12,13 to be illustrated, also can use an insulating part.

(execution mode 3)

In the present embodiment, for the structure mark identical symbol identical, and omit explanation to it with execution mode 1.Be with the difference of execution mode 1, will cast between first loop A and the second coil B by insulating material.And, make the winding direction of the second coil B be different from

execution mode

1,2.

Use the transformer of Fig. 3 A, Fig. 3 B explanation present embodiment.In the transformer 40 of Fig. 3 A, Fig. 3 B, the structure of first loop A and the second coil B is identical with execution mode 1 with configuration.

In the present embodiment, at first secondary winding 5 that constitutes first loop A with constitute between the second subprime winding 10 of the second coil B between recess 10c, the 5c of i.e. a

side protuberance

5b, 10b and the opposing party, fill casting insulation material 14 and also make this casting insulation material 14 sclerosis with concaveconvex shape with concaveconvex shape.Utilize casting insulation material 14, can fix the position of first secondary winding 5 and second subprime winding 10.In addition, can also make 10 insulation of first secondary winding 5 and second subprime winding.The states of the assembling of iron core 1 and structure, winding etc. are identical with execution mode 1.Need to prove,, for example can list epoxy resin etc. as casting insulation material 14.

In the present embodiment, make the winding direction of the second coil B be different from execution mode 1,2.Yet, in the present embodiment, so long as for a side protuberance 5b, recess 10c, the 5c that 10b is configured in the opposing party, and the interval that makes 10 of the interval of 5 of the first adjacent secondary winding and adjacent second subprime windings gets final product greater than the thickness of first secondary winding 5 and second subprime winding 10.

As mentioned above, according to present embodiment, can realize the effect identical with execution mode 1,2.In addition, compare, can carry out the insulation between fixing and first loop A and the second coil B of first loop A and the second coil B more reliably with

execution mode

1,2.

Utilizability on the industry

Even transformer of the present invention also can be realized miniaturization and slimming owing to increase the sectional area of secondary windings, so be effective as the transformer that is used for the big arc welder of secondary current etc. especially.

Claims

1. a transformer possesses two coils and two iron cores, and described transformer is characterised in that,

Described coil possesses:

Bobbin;

First winding of on described bobbin, reeling;

Second winding of on described first winding, reeling across insulant,

Described two coil configuration are, separate described second winding of reeling greater than the interval of the thickness of described second winding between adjacent described second winding, and between second winding of a described coil second winding of another described coil of configuration.

2. transformer as claimed in claim 1 is characterized in that,

The position of described second winding of described another coil of configuration between described second winding of a described coil disposes insulating part.

3. transformer as claimed in claim 1 is characterized in that,

Cast by insulating resin in the position of described second winding of described another coil of configuration between described second winding of a described coil.

4. the assemble method of a transformer, described transformer possesses two coils and two iron cores, and the assemble method of described transformer is characterised in that, comprises the steps:

Behind first winding of reeling on the bobbin, across insulant on described first winding between adjacent described second winding, separating greater than the mode at the interval of the thickness of described second winding second winding of reeling, thereby obtain the step of described two coils;

Dispose the step of described two coils in the mode of second winding of another described coil of configuration between second winding of a described coil;

Two described iron cores are inserted the step of hollow space of the inboard of two described bobbins respectively.