CN101494115A - Apparatus f or improving transformer eddy flow attrition, electronic product and control method for the apparatus - Google Patents
Apparatus f or improving transformer eddy flow attrition, electronic product and control method for the apparatus Download PDFInfo
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- CN101494115A CN101494115A CNA2008100043891A CN200810004389A CN101494115A CN 101494115 A CN101494115 A CN 101494115A CN A2008100043891 A CNA2008100043891 A CN A2008100043891A CN 200810004389 A CN200810004389 A CN 200810004389A CN 101494115 A CN101494115 A CN 101494115A
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Abstract
The invention discloses a device used for improving eddy current loss of a transformer, an electronic product and a controlling method thereof, wherein, the device comprises a conductive shell and an insulating sheet; the conductive shell is provided with an eddy current reduction opening, wherein, the eddy current reduction opening is positioned at the front surface of the air gap so as to reduce the eddy current loss caused by the transformer; and the insulating sheet is arranged between the eddy current reduction opening and the transformer.
Description
Technical field
The present invention relates to a kind of control method of improving device, electronic product and the device of transformer eddy current loss (Eddy current loss), but especially refer to a kind ofly comprise that one has the device of elimination eddy current loss that an eddy current is subdued the external conductive casing of opening.
Background technology
For the unit intensity that makes integrated circuit or electronic product improves, enable to meet in unit are/volume, to comprise the more trend of polyelectron element, the electronic product of today is all pursued thinner, lighter and more miniaturization.Because ordering about of these requirements impels printed circuit board (PCB) (PCB) and electronic product all to pursue the development of slimming (low-profile); Because no matter printed circuit board (PCB) or electronic product if can be made thinly more, then in same volume, can hold more relatively electronic component or subsystem.Therefore, how the electronic product that comprises a transformer has at present moved towards the design of thin typeization.The cutaway view that is a known electronic product for example shown in Figure 1 with a transformer.Be conserve space, this transformer is the design of adopting a horizontal type transformer.But but this electronic product 1 comprises an external conductive casing loam cake 10, a transformer 11, a printed circuit board (PCB) 12 and an external conductive casing lower cover 13.This transformer 11 also comprises 111 and one air gap 112 (seeing Fig. 2 (a)) unshakable in one's determination.This electronic product 1 can be any one electronic product that comprises the transformer of a tool one air gap, for example, this electronic product wherein any of one in-building type supply unit that can be selected from an in-building type supply unit of an electric stabilizer, a LCD and a kneetop computer.
But the design of above-mentioned thin typeization and horizontal type transformer, then can bring a great shortcoming, that is exactly air gap 112 meeting generations one edge magnetic flux (the fringing flux of transformer, shown in Fig. 2 (a)), when but this edge flux contacts or penetrates this external conductive casing loam cake 10, because of these outer casing upper cover 10 cutting magnetic lines produce an electric current I (i.e. an eddy current, shown in Fig. 2 (b)-(c)).This eddy current flows on this outer casing upper cover 10, because of a resistance R of this outer casing upper cover 10, will produce a loss (=I
2R), this is an eddy current loss.
In global energy shortage at present, thus under must the consideration of energy savings, the elimination of this eddy current loss of above-mentioned this transformer or reduction, reality be an industrial quarters and consumer the important issue that must face jointly.
Therefore, the inventor improves prior art in view of the defective of known technology, has proposed device and control method thereof that the present invention improves transformer eddy current loss.
Summary of the invention
The main purpose of this case is to provide a kind of and is used for a device of elimination eddy current loss with transformer of an air gap, but this device is for to have the external conductive casing that an eddy current is subdued opening, in order to eliminate the eddy current loss that this air gap produces.
Another main purpose of this case is to provide a kind of device of subduing eddy current loss with transformer of an air gap that is used for, but comprise an external conductive casing, comprise that an eddy current subdues opening, wherein this eddy current is subdued the right opposite that opening is positioned at this air gap, to subdue the eddy current loss that this transformer is caused, and an insulating trip, subdue between opening and this transformer at this eddy current.
According to above-mentioned conception, it is a single opening that this eddy current is subdued opening, and this single opening is greater than this air gap, contained when but an edge magnetic flux that makes this air gap passes this external conductive casing one pass through the zone comprised by this single opening fully, but should external conductive casing be a metal shell, and this insulating trip is used to wrap up this transformer, to form an insulating barrier.
According to above-mentioned conception, this eddy current is subdued opening greater than this air gap, this eddy current is subdued opening and is also comprised the relative long and narrow opening with several of several long and narrow relatively shaded areas, but each this long and narrow relatively shaded areas is the part of this external conductive casing, and between two adjacent these long and narrow relatively shaded areas, form this long and narrow relatively opening, each this long and narrow relatively opening all is positioned at the opposite of this air gap, what contained when but an edge magnetic flux of this air gap passes this external conductive casing one passes through in the zone, each this long and narrow relatively shaded areas is all separated from one another with other arbitrary these relative long and narrow shaded areas, to subdue the eddy current loss that this transformer is caused.
According to above-mentioned conception, this eddy current is subdued opening and is passed through the zone greater than this.
According to above-mentioned conception, a width of each this long and narrow relatively shaded areas is equal in fact.
According to above-mentioned conception, each this long and narrow relatively shaded areas tool one first end and one second end, and this first end of each this long and narrow relatively shaded areas and this second end are subdued in the opening except that directly being connected by this shaded areas at this eddy current, and this first end and this second end are disconnected from each other each other.
A time main purpose of this case is to provide a kind of electronic product, comprise a transformer, has an air gap, and one subdue the device of transformer eddy current loss, but comprise an external conductive casing, have an eddy current and subdue opening, wherein this eddy current is subdued the right opposite that opening is positioned at this air gap, to subdue the eddy current loss that this transformer is caused.
According to above-mentioned conception, it is a single opening that this eddy current is subdued opening, and this single opening is greater than this air gap, but contained when making an edge magnetic flux of this air gap pass this external conductive casing one pass through the zone and comprised by this single opening fully, but should external conductive casing be a metal shell.
According to above-mentioned conception, this eddy current is subdued opening greater than this air gap, this eddy current is subdued opening and is also comprised the relative long and narrow opening with several of several long and narrow relatively shaded areas, but each this long and narrow relatively shaded areas is the part of this external conductive casing, and between two adjacent these long and narrow relatively shaded areas, form this long and narrow relatively opening, each this long and narrow relatively opening all is positioned at the opposite of this air gap, what contained when but an edge magnetic flux of this air gap passes this external conductive casing one passes through in the zone, each this long and narrow relatively shaded areas is all separated from one another with other arbitrary these relative long and narrow shaded areas, to subdue the eddy current loss that this transformer is caused.
According to above-mentioned conception, each this long and narrow relatively shaded areas tool one first end and one second end, and this first end of each this long and narrow relatively shaded areas and this second end are subdued in the opening except that directly being connected by this shaded areas at this eddy current, and this first end and this second end are disconnected from each other each other.
According to the conception of stating, this product is an electric stabilizer.
According to above-mentioned conception, this electric stabilizer is a thin type electric stabilizer.
According to above-mentioned conception, this transformer is a horizontal type transformer.
According to above-mentioned conception, but the external conductive casing of this product comprises a loam cake and a lower cover, and this loam cake has this eddy current and subdues opening.
According to above-mentioned conception, this electronic product also comprises an insulating trip and a circuit board, and this transformer is arranged on this circuit board, and this insulating trip is subdued between opening and this transformer at this eddy current, and be used to wrap up this circuit board and this transformer, to form an insulating barrier.
The another main purpose of this case is to provide a kind of control method of device of the eddy current loss that is used to eliminate a transformer, wherein this transformer has an air gap, but this device comprises an external conductive casing, tool one eddy current is subdued opening, and this eddy current is subdued the right opposite that opening is positioned at this air gap, and this method comprises following step: this eddy current that (a) makes this air gap be positioned at its right opposite is fully subdued opening and is contained; And (b) make an edge magnetic flux of this air gap subdue opening by this eddy current, but and this edge flux and this eddy current that should external conductive casing are subdued between part beyond the opening do not produce common factor, to eliminate the eddy current loss that this transformer is caused.
According to above-mentioned conception, this step (b) also comprises following step: arbitrary other this relative long and narrow shaded areas that each this long and narrow relatively shaded areas and this eddy current are subdued in the opening is all separated from one another; And (b2) make each this long and narrow relatively shaded areas form several non-overlapping each other eddy current to reduce this eddy current loss because of penetrating of this edge flux.
According to above-mentioned conception, have one first edge and one second edge between each this long and narrow relatively shaded areas and adjacent two these relative long and narrow openings, and each this eddy current is to be formed between this first edge and this second edge.
Description of drawings
Fig. 1 is the cutaway view that shows a known electronic product with a transformer;
Fig. 2 (a) is the vertical view that shows the edge magnetic flux that this air gap produced in the known transformer with an air gap;
Fig. 2 (b) shows that this air gap produces the cutaway view that this edge flux penetrates the electronic product casing of a conduction and produces an eddy current in the known transformer with an air gap;
Fig. 2 (c) shows just like this Eddy Distribution shown in Fig. 2 (b) in the vertical view of the electronic product casing of this conduction;
Fig. 3 (a) to (f) but be to show a vertical view according to the external conductive casing of the electronic product with transformer of first to the 6th preferred embodiment of the present invention conception respectively;
But Fig. 4 shows one according to being somebody's turn to do the vertical view that external conductive casing produces several eddy current in the 3rd preferred embodiment of the present invention's conception; And
Fig. 5 is the exploded view of demonstration one according to the electronic product with transformer of the 7th preferred embodiment of the present invention's conception.
Embodiment
Please referring to Fig. 3 (a), but be to show a vertical view according to the external conductive casing with transformer of first preferred embodiment of the present invention's conception.This electronic product 2 comprises a transformer 11 (fully show), and it has 111 and one air gap 112 unshakable in one's determination, but and an external conductive casing 20, subdue opening 201 but this external conductive casing 20 also comprises an eddy current.The edge magnetic flux that this air gap 112 is produced outwards penetrates formed one and passes through the zone shown in the point-like elliptical region among Fig. 3 (b).And this eddy current is subdued opening 201 and must be passed through the zone greater than this, but makes this edge flux with should external conductive casing 20 non-intersect, to eliminate aforesaid eddy current fully, makes and avoids this transformer to produce an eddy current loss.Because the metal shell of thin type electronic product and the distance of its electronic component are little, therefore between must install an insulating trip additional, preventing unnecessary electric leakage and discharge, so this eddy current is subdued and is also comprised an insulating trip (not shown) between opening 201 and this transformer 11; In addition, this eddy current is subdued and also can be sticked on a Product labelling paster (also show) on the opening.
Please referring to Fig. 3 (b), but be to show a vertical view according to the external conductive casing of the electronic product with transformer of second preferred embodiment of the present invention's conception.This electronic product 3 comprises this transformer 11, and it also has this iron core 111 and this air gap 112 (above all show), but and an external conductive casing 30, but should external conductive casing 30 also comprise the rectangular long and narrow relatively opening 301 of several levels trends.The edge magnetic flux that this air gap 112 produced outwards penetrates above-mentioned this of forming and passes through the zone shown in the point-like elliptical region among Fig. 3 (b).And form a long and narrow relatively shaded areas 302 301 of two these rectangular openings adjacent one another are, (it is according to eddy current of second preferred embodiment of the present invention's conception and subdues opening the formed zone of protection of set of these several rectangular long and narrow relatively opening 301 and these several relative long and narrow shaded areas 302, shown in Fig. 3 (c)), must pass through the zone greater than this edge flux, and arbitrary this long and narrow relatively shaded areas 302 has one first end 3021 and one second end 3022, this first with this second end 3021 and 3022 in this zone of protection, except that directly connecting by this long and narrow relatively shaded areas 302, this first separates with 3022 each other with this second end 3021, this long and narrow relatively shaded areas 302 just, all separated from one another with arbitrary other relative long and narrow shaded areas 302 in this zone of protection, but to avoid on this external conductive casing 30, producing a large amount of eddy current (the follow-up detailed description again of this point), to reduce this eddy current loss that aforesaid this transformer is produced.Second preferred embodiment of the present invention also comprises an insulating trip (not shown) between these several long and narrow relatively opening 301 and this transformer 11, and also can stick on a Product labelling paster (also showing) on these several long and narrow relatively opening 301.This one second preferred embodiment is the regulation that more easily meets as finger test Ampere's law such as (finger test) than the advantage of this first preferred embodiment, but shortcoming is then for producing the eddy current of trace, therefore this second preferred embodiment is than this first preferred embodiment, and system effectiveness is lower slightly.
Please referring to Fig. 3 (c), but be to show a vertical view according to the external conductive casing with transformer of the 3rd preferred embodiment of the present invention's conception.This electronic product 4 comprises this transformer 11, and it also has this iron core 111 and this air gap 112 (above all show), but and an external conductive casing 40, but should external conductive casing 40 also comprise the rectangular long and narrow relatively opening 401 of several capwises.This does not exist together for itself and second preferred embodiment, and all the other operation principles are all identical with this second preferred embodiment with pluses and minuses.And form a long and narrow relatively shaded areas 402 at 401 of the rectangular long and narrow relatively openings of two these capwises adjacent one another are, these several rectangular long and narrow relatively opening 401 promptly forms aforesaid this zone of protection (shown in Fig. 3 (c)) with the set of these several relative long and narrow shaded areas 402, it also passes through the zone greater than this edge flux, and arbitrary this long and narrow relatively shaded areas 402, all separated from one another with arbitrary other relative long and narrow shaded areas 402 in this zone of protection, but to avoid on this external conductive casing 40, producing a large amount of eddy current, to reduce this eddy current loss that aforesaid this transformer is produced.
Please referring to Fig. 3 (d), but be to show a vertical view according to the external conductive casing with transformer of the 4th preferred embodiment of the present invention's conception.This electronic product 5 comprises this transformer 11, and it also has this iron core 111 and this air gap 112 (above all show), but and an external conductive casing 50, but should external conductive casing 50 also comprise the rectangular long and narrow relatively opening 501 of several inclinations.This is for its and this second and not the existing together of the 3rd preferred embodiment.And forming a long and narrow relatively shaded areas 502 501 of the rectangular long and narrow relatively openings of two these inclinations adjacent one another are, all the other operation principles and pluses and minuses are all second identical with the 3rd preferred embodiment with this.The formed zone of protection of set of the rectangular long and narrow relatively opening 501 of these several inclinations and these several relative long and narrow shaded areas 502, also must pass through the zone greater than this edge flux, and arbitrary this long and narrow relatively shaded areas 502, all separated from one another with arbitrary other relative long and narrow shaded areas 502 in this zone of protection, but to avoid on this external conductive casing 50, producing a large amount of eddy current, to reduce this eddy current loss that aforesaid this transformer is produced.
Please referring to Fig. 3 (e), but be to show a vertical view according to the external conductive casing with transformer of the 5th preferred embodiment of the present invention's conception.This electronic product 6 comprises this transformer 11, also have this iron core 111 and this air gap 112 (above all demonstrations), a but and external conductive casing 60, but be somebody's turn to do the long and narrow relatively opening 601 that external conductive casing 60 also comprises several lightning shapes, all the other operation principles are all identical with this second to the 4th preferred embodiment with pluses and minuses.The formed zone of protection of set of the long and narrow relatively opening 601 of these several lightning shapes and these several relative long and narrow shaded areas 602, also must pass through the zone greater than this edge flux, and arbitrary this long and narrow relatively shaded areas 602, all separated from one another with arbitrary other relative long and narrow shaded areas 602 in this zone of protection, but to avoid on this external conductive casing 60, producing a large amount of eddy current, to reduce this eddy current loss that aforesaid this transformer is produced.
Please referring to Fig. 3 (f), but be to show a vertical view according to the external conductive casing with transformer of the 6th preferred embodiment of the present invention's conception.This electronic product 7 comprises this transformer 11, also has this iron core 111 and this air gap 112 (above all show), but and an external conductive casing 70, but should external conductive casing 70 also comprise the long and narrow relatively opening 701 of several hot dog shapes.And form a long and narrow relatively shaded areas 702 at 701 of the long and narrow relatively openings of two these hot dog shapes adjacent one another are, the formed zone of protection (not shown) of set of the long and narrow relatively opening 701 of these several hot dog shapes and these several relative long and narrow shaded areas 702, must pass through the zone greater than this edge flux, and arbitrary this long and narrow relatively shaded areas 702, all separated from one another with arbitrary other relative long and narrow shaded areas 702 in this zone of protection, but to avoid on this external conductive casing 70, producing a large amount of eddy current, to reduce this eddy current loss that aforesaid this transformer is produced.
Please referring to Fig. 4, but be to show one according to the vertical view that should external conductive casing in the 3rd preferred embodiment of the present invention's conception produces several eddy current.In the 3rd preferred embodiment of the present invention, but this electronic product 4 comprises this external conductive casing 40, this shell 40 also comprises the relative long and narrow shaded areas 402 with several of the oblong openings 401 of several capwises, wait on several long and narrow relatively shaded areas 402 at these, form several eddy current because of being penetrated by this edge flux, but each this eddy current is to be formed between one first edge 4021 and one second edge 4022 of this long and narrow relatively shaded areas 402 adjacent to these two rectangular long and narrow relatively openings 401, therefore it is with respect to the eddy current shown in Fig. 2 (c), little very many on the magnitude of current, so also relative having significantly reduced of its eddy current loss.
, be the exploded view of demonstration one please according to the electronic product with transformer of the 7th preferred embodiment of the present invention's conception referring to Fig. 5.This electronic product 8 comprises a transformer 81, also have unshakable in one's determination and an air gap (above all show) but with an external conductive casing loam cake 80, but should external conductive casing loam cake 80 also comprise the long and narrow relatively opening 801 of several hot dog shapes.And form a long and narrow relatively shaded areas 802 at 801 of the openings of two these hot dog shapes adjacent one another are, certainly, the formed zone of protection (not shown) of set of the opening 801 of these several hot dog shapes and these several relative long and narrow shaded areas 802, also must pass through regional (not shown) greater than an edge magnetic flux, and arbitrary this long and narrow relatively shaded areas 802, all separated from one another with arbitrary other relative long and narrow shaded areas 802 in this zone of protection, but to avoid on this external conductive casing loam cake 80, producing a large amount of eddy current, to reduce this eddy current loss that aforesaid this transformer is produced.In addition, this electronic product 8 also comprises a circuit board 82 (comprising two terminals 821 and a screw 822), in order to but this transformer 81, an external conductive casing lower cover 83 and an insulating trip 84 to be set, be used to wrap up this circuit board 82 and this transformer 81, to form an insulating barrier, and a Product labelling paster 85, but it will be attached on this external conductive casing loam cake 80.
Experimental result
For verifying benefit of the present invention, this experiment is to experimentize with a high-frequency electrical minor stabilizer T5 and two of 35W fluorescent lamps, is divided into (product casing) and does not improve (please referring to Fig. 1 and Fig. 2 (c)) and (product casing) and improve two groups of back (please referring to Fig. 5 the 7th preferred embodiment according to the present invention's conception).Wherein the input voltage of this electric stabilizer of two groups be 230VAC, incoming frequency be 50Hz, power factor be 0.993 and switching frequency be all 72KHz; The light tube electric voltage of fluorescent tube one is 210VAC in addition, and the fulgurite electric current is 0.173A, and power of lamp tube is 35.6W, and the light tube electric voltage of fluorescent tube two is 209VAC, and the fulgurite electric current is 0.175A, and power of lamp tube is 35.84W.Improve with all the other experimental datas of improving two groups of backs more as shown in Table 1.The efficient of not improvement group is 86.90%, is 90.67% and improve the efficient of organizing the back, and its improved efficiency reaches 3.8%; To reducing an eddy current loss that is caused by the transformer that it comprised, its achievement is very obvious.
Table one does not improve and the comparison that improves the two groups of experimental datas in back
| Parameter | Input power | Two power of lamp tube | Efficient | Improve |
| Do not improve | 82.22 | 71.45 | 86.90％ | |
| After the improvement | 78.79 | 71.45 | 90.67％ | 3.8％ |
By above-mentioned explanation as can be known, the invention reside in provides a kind of device of elimination eddy current loss with transformer of an air gap that is used for, but this device is for having the external conductive casing that an eddy current is subdued opening, it is a single opening that this eddy current is subdued opening, in order to eliminate the eddy current loss that this air gap produces.In addition the present invention also is to provide another kind to be used for a device of reduction eddy current loss with transformer of an air gap, but this device is for having the external conductive casing that an eddy current is subdued opening, this eddy current is subdued opening and is had the relative long and narrow shaded areas with several of several long and narrow relatively openings, in order to reduce the eddy current loss that this air gap produces.The edge magnetic flux that this air gap produced outwards penetrates formation one and passes through the zone.And between two these openings adjacent one another are, form a long and narrow relatively shaded areas (in sum, it can be any long and narrow shaded areas with same widths), the formed zone of protection of set of several relative long and narrow shaded areas of these several long and narrow relatively opening and these, must pass through the zone greater than one of this edge flux, and arbitrary this long and narrow relatively shaded areas is all separated from one another with arbitrary other relative long and narrow shaded areas, but to avoid on this external conductive casing, producing a large amount of eddy current.Therefore its benefit that has a preferable relatively elimination or reduce the eddy current loss that transformer produced.
Be with, even this case is described in detail by the above embodiments, can be changed, but not within the protection range of appended claims by those skilled in the art.
Claims (10)
1, a kind of device of subduing eddy current loss with transformer of an air gap that is used for is characterized in that, comprises:
But an external conductive casing comprises that an eddy current subdues opening,
Wherein said eddy current is subdued the right opposite that opening is positioned at described air gap, to subdue the eddy current loss that described transformer is caused; And
One insulating trip is subdued between opening and the described transformer at described eddy current.
2, device as claimed in claim 1 is characterized in that, it is a single opening that wherein said eddy current is subdued opening, and described single opening is greater than described air gap, but described external conductive casing is a metal shell, and described insulating trip is used to wrap up described transformer, to form an insulating barrier.
3, device as claimed in claim 1 is characterized in that:
Described eddy current is subdued opening greater than described air gap, described eddy current is subdued opening and is also comprised the relative long and narrow opening with several of several long and narrow relatively shaded areas, but each described long and narrow relatively shaded areas is the part of described external conductive casing, and forms described long and narrow relatively opening between two adjacent described long and narrow relatively shaded areas;
One width of each described long and narrow relatively shaded areas is equal in fact; And
Each described long and narrow relatively shaded areas has one first end and one second end, and described first end of each described long and narrow relatively shaded areas and described second end are subdued in the opening except that directly being connected by described shaded areas at described eddy current, and described first end and described second end are disconnected from each other each other.
4, a kind of electronic product is characterized in that, comprises:
One transformer has an air gap; And
One subdues the device of transformer eddy current loss, comprising:
But an external conductive casing has an eddy current and subdues opening,
Wherein said eddy current is subdued the right opposite that opening is positioned at described air gap, to subdue the eddy current loss that described transformer is caused.
5, electronic product as claimed in claim 4 is characterized in that:
It is a single opening that described eddy current is subdued opening, and described single opening is greater than described air gap, but described external conductive casing is a metal shell; Or
Described eddy current is subdued opening and is also comprised the relative long and narrow opening with several of several long and narrow relatively shaded areas, but each described long and narrow relatively shaded areas is the part of described external conductive casing, and between two adjacent described long and narrow relatively shaded areas, form described long and narrow relatively opening, subdue in the opening at described eddy current, each described long and narrow relatively shaded areas is all separated from one another with other arbitrary described relative long and narrow shaded areas, to subdue the eddy current loss that described transformer is caused.
6, electronic product as claimed in claim 4 is characterized in that:
Described product is an electric stabilizer, and described electric stabilizer is a thin type electric stabilizer; And/or
Described transformer is a horizontal type transformer.
7, electronic product as claimed in claim 4 is characterized in that:
But the external conductive casing of described product comprises a loam cake and a lower cover, and described loam cake has described eddy current and subdues opening; And/or
Described electronic product also comprises an insulating trip and a circuit board, described transformer is arranged on the described circuit board, described insulating trip is subdued between opening and the described transformer at described eddy current, and is used to wrap up described circuit board and described transformer, to form an insulating barrier.
8, a kind of control method of device of the eddy current loss that is used to eliminate a transformer, wherein said transformer has an air gap, but described device comprises an external conductive casing, have an eddy current and subdue opening, and described eddy current is subdued the right opposite that opening is positioned at described air gap, and described method comprises the following step:
(a) the described eddy current that makes described air gap be positioned at its right opposite is fully subdued opening and is contained; And
(b) make an edge magnetic flux of described air gap subdue opening by described eddy current, but and the described eddy current of described edge flux and described external conductive casing is subdued between part beyond the opening do not produce common factor, to eliminate the eddy current loss that described transformer is caused.
9, method as claimed in claim 8 is characterized in that:
Described device is a device as claimed in claim 2; Or
Described device is a device as claimed in claim 3, and described step (b) also comprises the following steps:
(b1) make each described long and narrow relatively shaded areas all separated from one another with arbitrary other the described relative long and narrow shaded areas in described eddy current is subdued opening; And
(b2) make each described long and narrow relatively shaded areas form several non-overlapping each other eddy current to reduce described eddy current loss because of penetrating of described edge flux.
10, method as claimed in claim 8 is characterized in that:
Have one first edge and one second edge between each described long and narrow relatively shaded areas and adjacent two described relative long and narrow openings, and each described eddy current is to be formed between described first edge and described second edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100043891A CN101494115A (en) | 2008-01-22 | 2008-01-22 | Apparatus f or improving transformer eddy flow attrition, electronic product and control method for the apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100043891A CN101494115A (en) | 2008-01-22 | 2008-01-22 | Apparatus f or improving transformer eddy flow attrition, electronic product and control method for the apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN101494115A true CN101494115A (en) | 2009-07-29 |
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| CNA2008100043891A Pending CN101494115A (en) | 2008-01-22 | 2008-01-22 | Apparatus f or improving transformer eddy flow attrition, electronic product and control method for the apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109950709A (en) * | 2019-04-09 | 2019-06-28 | 深圳供电局有限公司 | Connection assembly and connection method for coaxial cable and coaxial cable system |
-
2008
- 2008-01-22 CN CNA2008100043891A patent/CN101494115A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109950709A (en) * | 2019-04-09 | 2019-06-28 | 深圳供电局有限公司 | Connection assembly and connection method for coaxial cable and coaxial cable system |
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