CN101202156B

CN101202156B - Transformer with safety creepage distance

Info

Publication number: CN101202156B
Application number: CN2007101562379A
Authority: CN
Inventors: 何岳明
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-10-18
Filing date: 2007-10-18
Publication date: 2010-11-17
Anticipated expiration: 2027-10-18
Also published as: CN101202156A

Abstract

The invention relates to a transformer provided with a safe creepage distance, comprising at least one E-shaped iron core (1). A cylinder-shaped coil bracket (2) made of insulation material is sleeved on a central column (11) of the iron core (1). A coil (3) is winded on the coil bracket (2). An insulation jacket (4) is respectively and oppositely arranged on two sides of the central column (11) of the E-shaped iron core (1). The insulation jacket (4) looks as an L shape from a side-glance, two sides and a bottom side of which are all provided with outer-raised sides (41) are respectively attached to corresponding side faces of a side column (12) and a bottom side (13) of the E-shaped iron core (1). Compared with the prior art, the length of the insulation jacket of the invention does not need to be strictly matched with the length of the bottom side of the E-shaped iron core and the insulation jacket can just be positioned between the central column and the side column; and the necessary processing of a central through hole in the original components can be avoided, therefore, the structure of the insulation jacket can become simpler, and then not only materials can be conserved but a bulk manufacture can be realized more easily and an actual product qualified rate is largely raised.

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

Transformer is by electromagnetic induction principle, with identical frequency, and a kind of static electric equipment of voltage of transformation or electric current between two or more windings.Transformer is the indispensable assemblies of various electronic products, and electronic product more and more is tending towards lightly changing designs at present, causes transformer also to require dimensionally to dwindle relatively, and like this, the miniature transformer demand increases day by day.Wherein, the switchette power transformer generally comprise the insulation material coil brace, be wrapped in the coil on the coil brace and be coated on iron core outside the coil.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 the iron core, preventing the withstand voltage puncture in space, such as, require for Europe of switchette power transformer to be, at withstand voltage time less than 250V, creepage distance is not less than 4mm, greater than 250V withstand voltage down, creepage distance is not less than 6mm.Chinese invention patent application " a kind of transformer " as application number 200510060739.2 (publication number is CN1770334A) with safety creepage distance, exactly in order to satisfy this standard-required, this transformer is provided with insulating bushing between coil periphery and iron core, the obstruct by flanging on the insulating bushing makes and leaves enough gaps between the two.The insulating bushing that in this transformer, is " recessed " font, because the distance between the length of its bottom side and the dual-side needs respectively to adapt with the base and the lateral column of E sections core, and the width of insulating bushing flanging has determined the creepage distance of transformer, and the center through hole of insulating bushing needs again to be complementary with the newel of E sections core, wear for this newel, these factors make that all the processing request of the size of this insulating bushing and shape is all very accurate, former should insulating bushing size in miniature transformer smaller and more exquisite, thereby the production and processing of this insulating bushing required to become very high, actual product percent of pass is on the low side, therefore needs further improvement.

Summary of the invention

Technical problem to be solved by this invention is at above-mentioned prior art present situation, can reduce the element size requirement and makes parts be easier to the transformer with safety creepage distance of production and processing and provide a kind of.

The present invention solves the problems of the technologies described above the technical scheme that is adopted: this has the transformer of safety creepage distance, include the iron core that at least one is the E type, the tubular coil brace of one insulation material is enclosed within on the newel of iron core, be wound with coil on the described coil brace, it is characterized in that: in the newel both sides of described E sections core, relatively be provided with an insulation spacer respectively, this insulation spacer side-looking is the L type, its dual-side and base all have flanging and be attached to the lateral column of corresponding E sections core respectively and the side on base on.

The flanging of described insulation spacer has intercepted iron core and coil, therefore, the width of flanging has determined the safety creepage distance of transformer in this insulation spacer, as long as the width of flanging just can guarantee the safety creepage distance between coil and the iron core greater than desired safety creepage distance in the described insulation spacer.

Described E sections core can be two, and is oppositely arranged, and promptly the end of the end of their two lateral columns and newel is respectively relative in twos, at this moment, and all should sheathed two described insulation spacers on each E sections core;

Wherein, for the transformer that does not have the magnetic resistance requirement, the lateral column of two described E sections cores and newel two both ends of the surface respectively offset, at this moment, the side of two insulation spacers on E sections core also with respectively with another E sections core on the side of corresponding insulation spacer offset to good;

And for the transformer that the magnetic resistance requirement is arranged, the end of the lateral column of two described E sections cores and the end of newel are relative in twos respectively and leave the gap, at this moment, two side ends of described insulation spacer should extend to the end face of corresponding iron core lateral column and outside flanging always, and the end face of corresponding iron core lateral column is covered.

Described E sections core also can have only one, comprise also that in addition another is arranged on the iron core that is " one " font on the E sections core end face, promptly this E sections core newel is terminal offsets with described " one " font iron core, at this moment, described insulation spacer needs four, wherein first, the second insulation spacer is enclosed within on the E sections core, this is first years old, the side of the second insulation spacer envelopes two lateral columns of part E sections core respectively, the 3rd, the base of the 4th insulation spacer is enclosed within on " one " sections core and lays respectively at the both sides of E sections core newel end, and the 3rd, the side of the 4th insulation spacer envelopes all the other exposed parts of E sections core lateral column.

Newel in the above-mentioned E sections core can be columniform, also can be square, and described insulation spacer all is applicable to above two kinds of situations.

Compared with prior art, the invention has the advantages that: because the insulating element between iron core and the coil has made to lay respectively at the insulation spacer of the newel both sides of E sections core into, like this, the length of insulation spacer does not just need the strict base length with E sections core to mate, as long as can be placed between the newel and lateral column of E sections core, and exempted the processing of the necessary center through hole of original parts, make the structure of insulation spacer simpler, compare with original technology, not only saved material, and be easier to produce in enormous quantities processing, actual product percent of pass is risen significantly, as long as and the flanging size of insulation spacer meets the safety creepage distance requirement, just can make whole transformer have safety creepage distance.

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 of Fig. 1.

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 of Fig. 4.

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

Fig. 8 be among Fig. 7 iron core and the insulation spacer three-dimensional exploded view.

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, the transformer that this has safety creepage distance includes two tubular coil braces 2 that are the iron core 1 of E type and are enclosed within the insulation material on the newel 11 of E sections core 1;

Wherein, be wound with coil 3 on the described coil brace 2;

The lateral column 12 of described two E sections cores 1 is relative in twos respectively with newel 11, and tubular coil brace 2 promptly passes through its center borehole jack on the newel 11 of two E sections cores 1;

Newel 11 both sides at described E sections core 1, relatively be provided with an insulation spacer 4 respectively, these insulation spacer 4 side-lookings are the L type, its dual-side and base all have flanging 41 and be attached to the lateral column 12 of corresponding E sections core 1 respectively and the side on base 13 on, all should sheathed two described insulation spacers 4 on each E sections core 1;

Transformer shown in the present embodiment does not have magnetic resistance to require, promptly the lateral column 12 of two described E sections cores 1 and newel 11 respectively two both ends of the surface offset.

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 described E sections cores 1 is relative in twos respectively with newel 11 and leave the gap, two side ends of described insulation spacer 4 extend to the end face of corresponding iron core 1 lateral column 12 and outside flanging 42 always, and the end face of corresponding iron core 1 lateral column 12 is covered.

As Fig. 7, shown in Figure 8, be embodiments of the invention three, with embodiment one, two different are, described E sections core 1 has only one, comprise also that in addition another is arranged on the iron core 5 that is " one " font on E sections core 1 end face, 4 of described insulation spacers still need four, the first insulation spacer 4a wherein, the second insulation spacer 4b is enclosed within on the E sections core 1, this is first years old, the second insulation spacer 4a, the side of 4b envelopes two lateral columns 12 of part E sections core 1 respectively, the 3rd, the 4th insulation spacer 4c, the base of 4d is enclosed within on " one " sections core 5 and lays respectively at the both sides of E sections core 1 newel 11 ends, and the 3rd, the 4th insulation spacer 4c, the side of 4d envelopes all the other exposed parts of E sections core 1 lateral column 12.

Claims

1. transformer with safety creepage distance, include at least one iron core that is the E type (1), the tubular coil brace (2) of one insulation material is enclosed within on the newel (11) of iron core (1), be wound with coil (3) on the described coil brace (2), it is characterized in that: in newel (11) both sides of described E sections core (1), relatively be provided with an insulation spacer (4) respectively, this insulation spacer (4) side-looking is the L type, its dual-side and base all have flanging (41) and be attached to the lateral column (12) of corresponding E sections core (1) 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 the end of their two lateral columns (12) is relative in twos respectively with the end of newel (11), all sheathed two described insulation spacers (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 two described E sections cores (1) and newel (11) two both ends of the surface respectively offset, and the side of on the E sections core (1) two insulation spacers (4) also offsets with the side that another E sections core (1) is gone up corresponding insulation spacer (4) respectively.

4. the transformer with safety creepage distance according to claim 2, it is characterized in that: the end of the lateral column (12) of two described E sections cores (1) is relative in twos respectively with the end of newel (11) and leave the gap, two side ends of described insulation spacer (4) extend to the end face of corresponding iron core (1) lateral column (12) and outside flanging (42) always, and the end face of corresponding iron core (1) lateral column (12) is covered.

5. the transformer with safety creepage distance according to claim 1, it is characterized in that: described E sections core (1) has only one, comprise also that in addition another is arranged on the iron core that is " one " font (5) on E sections core (1) end face, described insulation spacer (4) then needs four, wherein first the insulation spacer (4a), the second insulation spacer (4b) is enclosed within on the E sections core (1), this is first years old, the second insulation spacer (4a, side 4b) envelopes two lateral columns (12) of part E sections core (1) respectively, the 3rd, the 4th insulation spacer (4c, base 4d) is enclosed within " one " sections core (5) and goes up and lay respectively at the terminal both sides of E sections core (1) newel (11), and the 3rd, the 4th insulation spacer (4c, side 4d) envelopes all the other exposed parts of E sections core (1) lateral column (12).