CN1770334A

CN1770334A - Transformer with safety creepage distance

Info

Publication number: CN1770334A
Application number: CN 200510060739
Authority: CN
Inventors: 何岳明
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-09-13
Filing date: 2005-09-13
Publication date: 2006-05-10
Anticipated expiration: 2025-09-13
Also published as: CN100485832C

Abstract

This invention relates to one safe climbing electricity distance transducer, which comprises at least one E shape iron core, one isolation material cylinder coil rack on the center column with rack rolled with coil. The invention is characterized by the following: the said E shape iron core has one isolated underlay cover in concaved shape; its bottom center is opened with whole E shaped iron core and its two sides and bottom side has turned over side sticking to the iron core two side columns. This invention adds isolated underlay to ensure the side sizes meet the climbing requirement to make total transducer with climbing distance without limit. In equal volume, the transducer achieves the required power.

Description

A kind of transformer with safety creepage distance

Technical field

The present invention relates to a kind of miniature transformer, particularly a kind of transformer with safety creepage distance.

Background technology

In safety standard, the standard that transformer is had a safety creepage distance, be under certain requirement of withstand voltage, to have certain creepage distance between coil and core unshakable in one's determination, in case the withstand voltage puncture in space, as Europe requirement be for the switchette power transformer, at withstand voltage time less than 250V, creepage distance is not less than 4mm, at withstand voltage time greater than 250V, creepage distance is not less than 6mm, according to the switching mode power supply transformer structure, satisfy this standard-required, must leave enough gaps between coil periphery and the iron core, that is to say, when volume of transformer hour, the size of coil will be restricted, this just makes the switching mode power supply transformer of small size can't reach qualified power, voltage, every index such as electric current.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of to make the coil that has more volume on the iron core of certain size and still have the transformer of safety creepage distance simultaneously at above-mentioned prior art present situation.

The present invention solves the problems of the technologies described above the technical scheme that is adopted: this transformer with safety creepage distance includes the iron core that is the E type by at least one, the tubular coil brace of one insulation material is enclosed within on the newel of iron core, be wound with coil on the support, it is characterized in that, described E sections core retainer plate has the lining of an insulation material, this lining side-looking is " recessed " font, the newel that its base central authorities have pore volume E font iron core passes, its dual-side and base all have flanging and be attached to two lateral columns of E font iron core respectively and the side on base on.

As long as the flange width of described insulating bushing just can guarantee the safety creepage distance between coil and the iron core greater than desired safety creepage distance.

Described E sections core can be two, and their lateral column and newel two both ends of the surface are relative respectively, at this moment, all should sheathed described insulating bushing on each E sections core; Wherein, for the transformer that does not have the magnetic resistance requirement, the lateral column of described two E sections cores and newel two both ends of the surface respectively offset, and at this moment, the side of two insulating bushings is also to offset in twos respectively to good; And for the transformer that the magnetic resistance requirement is arranged, the lateral column of described two E sections cores is relative in twos respectively with newel and leave the gap, at this moment, two side ends of insulating bushing should extend to the terminal and outward flanging of corresponding iron core lateral column always, and the end of corresponding iron core lateral column is covered.

Described E sections core also can have only one, also comprise an iron core that is oppositely arranged and is " one " font in addition, at this moment, described insulating bushing still needs two, wherein first insulating bushing is enclosed within on the E sections core, the side of this first insulating bushing envelopes the lateral column of part E sections core, the base of second insulating bushing is enclosed within on " one " sections core, the newel end of E sections core promptly penetrates in the medium pore of this second insulating bushing, and the side of second insulating bushing envelopes all the other exposed parts of E sections core lateral column.

Compared with prior art, the present invention is owing to set up the insulating bushing with flanging between iron core and coil, therefore, as long as guarantee the flanging size conforms safety creepage distance requirement of insulating bushing, just can make whole transformer have safety creepage distance, thereby make the size of coil no longer restricted, under equal volume, make transformer can reach every indexs such as desired power, voltage, electric current.

Description of drawings

Fig. 1 is the schematic perspective view of the embodiment of the invention one.

Fig. 2 is the sectional perspective exploded view of Fig. 1.

Fig. 3 is the perspective exploded view behind Fig. 1 Rotate 180 °.

The schematic perspective view of Fig. 4 embodiment of the invention two.

Fig. 5 is the sectional perspective exploded view of Fig. 4.

Fig. 6 is the perspective exploded view behind Fig. 4 Rotate 180 °.

Fig. 7 is the schematic perspective view of the embodiment of the invention three.

Fig. 8 is the three-dimensional exploded view of iron core and insulating bushing among Fig. 7.

Embodiment

Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.

As Fig. 1～shown in Figure 3, be embodiments of the invention one, this transformer with safety creepage distance includes by two and is the iron core 1 of E type and the tubular coil brace 2 of an insulation material, be wound with coil 3 on the support 2, two both ends of the surface are relative respectively with newel 11 for the lateral column 12 of described two E sections cores, and coil brace 2 promptly is enclosed within on the newel 11 of two E sections cores by its centre bore 21;

Equal lining has the lining 4 of an insulation material on the described E sections core 1, the lateral column 12 of iron core is separated with coil brace 2, these lining 4 side-lookings are " recessed " font, the newel 11 that its base central authorities have pore volume E font iron core passes, its dual-side and base all have flanging 41 and be attached to two lateral columns 12 of E font iron core respectively and the side on base 13 on;

Transformer shown in the present embodiment does not have magnetic resistance to require, and the lateral column 12 of promptly described two E sections cores and newel 11 two both ends of the surface respectively offset, and the side of described two insulating bushings is also to offset in twos respectively.

As long as flange 41 width of described insulating bushing just can guarantee the safety creepage distance between coil 3 and the iron core 1 greater than desired safety creepage distance.

As Fig. 4～shown in Figure 6, be embodiments of the invention two, different with embodiment one is, present embodiment is the transformer that the magnetic resistance requirement is arranged, promptly the lateral column 12 of two E sections cores is relative in twos respectively with newel 11 and leave the gap, therefore, two side ends of insulating bushing 4 also extend to the terminal and outward flanging 42 of corresponding iron core lateral column 12 always, and the end of corresponding iron core lateral column 12 is covered.

As Fig. 7, shown in Figure 8, be embodiments of the invention three, with embodiment one, two different is, E sections core 1 has only one, also comprise an iron core 5 that is oppositely arranged and is " one " font in addition, described insulating bushing 4 then still is two, wherein first insulating bushing 4 is enclosed within on the E sections core 1, the side of this first insulating bushing 4 envelopes the lateral column 12 of part E sections core, the base of second insulating bushing 4 is enclosed within on " one " sections core 5, newel 11 ends of E sections core promptly penetrate in the medium pore of this second insulating bushing 4, and the side of second insulating bushing 4 envelopes all the other exposed parts of E sections core lateral column 12.

Claims

1, a kind of transformer with safety creepage distance, include the iron core (1) that is the E type by at least one, the tubular coil brace (2) of one insulation material is enclosed within on the newel (11) at iron core, be wound with coil (3) on the support (2), it is characterized in that, described E sections core (1) is with the lining (4) of an insulation material, this lining (4) side-looking is " recessed " font, the newel (11) that its base central authorities have pore volume E font iron core passes, its dual-side and base all have flanging (41) and be attached to two lateral columns (12) of E font iron core respectively and the side of base (13) on.

2, the transformer with safety creepage distance according to claim 1, it is characterized in that described E sections core (1) is two, and their lateral column (12) is relative in twos respectively with newel (11), all should sheathed described insulating bushing (4) on each E sections core (1).

3, the transformer with safety creepage distance according to claim 2, it is characterized in that the lateral column (12) of described two E sections cores and newel (11) respectively two both ends of the surface offset, the side of described two insulating bushings (4) also respectively two both ends of the surface offset.

4, the transformer with safety creepage distance according to claim 2, it is characterized in that the lateral column (12) of described two E sections cores is relative in twos respectively with newel (11) and leave the gap, two side ends of described insulating bushing (4) extend to the terminal and outward flanging (42) of corresponding iron core lateral column (12) always, and the end of corresponding iron core lateral column (12) is covered.

5, transformer with safety creepage distance according to claim 1, it is characterized in that described E sections core (1) has only one, and comprise that another is oppositely arranged the iron core (5) that is " one " font, described insulating bushing (4) then needs two, wherein first insulating bushing (4) is enclosed within on the E sections core (1), the side of this first insulating bushing (4) envelopes the lateral column (12) of part E sections core, the base of second insulating bushing (4) is enclosed within on " one " sections core (5), newel (11) end of E sections core promptly penetrates in the medium pore of this second insulating bushing (4), and the side of second insulating bushing (4) envelopes all the other exposed parts of E sections core lateral column (12).