CN204130325U - A kind of transformer being applicable to Switching Power Supply - Google Patents
A kind of transformer being applicable to Switching Power Supply Download PDFInfo
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- CN204130325U CN204130325U CN201420624792.5U CN201420624792U CN204130325U CN 204130325 U CN204130325 U CN 204130325U CN 201420624792 U CN201420624792 U CN 201420624792U CN 204130325 U CN204130325 U CN 204130325U
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Abstract
The utility model discloses a kind of transformer being applicable to Switching Power Supply, comprise skeleton (1), to be inserted in frame center's cavity and the iron core (2) be centered around outside skeleton, the bottom coiling armature winding (N1) of described skeleton, the power supply input pin of armature winding and grounding leg are stretched out by the side of skeleton, the grounding leg of armature winding connects iron core by wire, outer side covers one deck screen (E1) of armature winding, this screen connects the grounding leg of armature winding by wire, coiling first secondary winding (N2) and second subprime winding (N3) successively outside screen, the number of turn of the first and second secondary winding, around to identical with phase place.Compared with prior art, the utility model jamming incoherent signal is little, do not have leakage current, can remove input common mode filtering inductance in circuit and Y capacitance, can meet be correlated with EMC regulation and client's requirement extremely low to source-drain stream simultaneously.
Description
Technical field
The utility model relates to transformer, particularly relates to a kind of wattage transformer being applicable to Switching Power Supply.
Background technology
Switching Power Supply widely uses in power supply adaptor, lighting apparatus, low-power machine.The core component of Switching Power Supply is transformer, to the performance of transformer and safety requirements more and more higher, wish that its cost is more and more lower simultaneously, requiring that transformer leakage stream will meet the relevant laws and regulations requirements such as EMC while more and more less.There is common mode disturbances in existing inside transformer, elementary high frequency noise is coupled to secondary, thus have influence on the secondary electronic equipment of connection.Existing solution is cross-over connection Y capacitance between primary and secondary, and common mode disturbances noise forms loop by Y electric capacity, effectively reduces common mode disturbances noise amplitude.The drawback that this kind of scheme is brought is the side effect that can produce leakage current, adds the cost of circuit simultaneously.
So research and develop a kind of jamming incoherent signal little, there is no leakage current, Y capacitance can be removed reduce the transformer of circuit cost and become the technical problem needing in the industry solution badly.
Utility model content
The utility model is the problems referred to above that will solve prior art, propose a kind of jamming incoherent signal little, there is no leakage current, be applicable to the wattage transformer of Switching Power Supply.
For solving the problems of the technologies described above, the technical scheme that the utility model proposes is a kind of transformer being applicable to Switching Power Supply of design, comprise skeleton, to be inserted in frame center's cavity and the iron core be centered around outside skeleton, the bottom coiling armature winding of described skeleton, the power supply input pin of armature winding and grounding leg are stretched out by the side of skeleton, the grounding leg of armature winding connects iron core by wire, outer side covers one deck screen of armature winding, this screen connects the grounding leg of armature winding by wire, coiling first secondary winding and second subprime winding successively outside screen, the number of turn of the first and second secondary winding, around to identical with phase place.
The elementary auxiliary winding of outside coiling one deck of described second subprime winding, power supply output pin and the grounding leg of elementary auxiliary winding are stretched out by the side of skeleton, and the grounding leg of elementary auxiliary winding connects iron core by wire.
A layer insulating is provided with between described armature winding and described screen.
Insulating barrier, the first secondary winding, second subprime winding, elementary auxiliary winding, be all provided with insulating barrier between adjacent layer or winding.
The width of described armature winding is identical with the width of skeleton window.
Described screen is Copper Foil, and the width of this Copper Foil is identical with the width of skeleton window, and the thickness of Copper Foil is 0.025 millimeter to 0.1 millimeter.
Described screen is the enamelled wire that one deck is closely wound around, and the width of screen is identical with the width of skeleton window.
Compared with prior art, the utility model jamming incoherent signal is little, do not have leakage current, can remove input common mode filtering inductance in circuit and Y capacitance, can meet be correlated with EMC regulation and client's requirement extremely low to source-drain stream simultaneously.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the utility model preferred embodiment;
Fig. 2 is the front view of the utility model preferred embodiment skeleton;
Fig. 3 is the front view of the utility model preferred embodiment;
Fig. 4 is the cutaway view of the utility model preferred embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is described in further detail.Should be appreciated that specific embodiment described herein only for explaining the utility model, and be not used in restriction the utility model.
A kind of transformer (being mainly suitable for the transformer within power output 18W) being applicable to Switching Power Supply, it comprises skeleton 1, and as shown in Figure 2, the interior and outer peripheral of frame center's cavity is around iron core 2 for the picture of skeleton.Fig. 3 is the front view of preferred embodiment, and in the window of skeleton, after winding around, iron core has been gone up in assembling.Referring to the circuit theory diagrams shown in Fig. 1, this transformer has armature winding N1, first secondary winding N2 and second subprime winding N3, referring to the cutaway view shown in Fig. 4, the bottom coiling armature winding N1 of described skeleton, the power supply input pin of armature winding and grounding leg are stretched out by the side of skeleton, the grounding leg 5 of armature winding connects iron core 2 by wire 6, outer side covers one deck screen E1 of armature winding, this screen connects the grounding leg of armature winding by wire, coiling first secondary winding N2 and second subprime winding N3 successively outside screen, the number of turn of the first and second secondary winding, around to identical (be all along around or be all back-roll), and phase place is identical.Screen shields the jamming incoherent signal that armature winding sends, and these jamming incoherent signals is imported to ground, eliminates leakage current.After using this transformer, Switching Power Supply can remove Y capacitance, thus reduces circuit cost.It may be noted that the first secondary winding N2 and second subprime winding N3 can separately to different load supplyings, also can in parallelly use, to solve the too thick and problem of hard bad coiling of solid wire.After in parallel, wire glass doubles, by more big current, and again can to EMC better effects if.
In the preferred embodiment, the elementary auxiliary winding N4 of outside coiling one deck of described second subprime winding N3, power supply output pin and the grounding leg of elementary auxiliary winding are stretched out by the side of skeleton, and the grounding leg of elementary auxiliary winding connects iron core by wire.Second subprime winding N3 is mainly used in providing working power to the chip in Switching Power Supply.
In the preferred embodiment, a layer insulating 3 is provided with between described armature winding N1 and described screen E1.For reaching better insulation effect, insulating barrier 3, first secondary winding N2, second subprime winding N3, elementary auxiliary winding N4, be all provided with insulating barrier 3 between adjacent layer or winding.
In the preferred embodiment, the width of described armature winding N1 is identical with the width of skeleton window.
In certain embodiments, described screen E1 is Copper Foil, and the width of this Copper Foil is identical with the width of skeleton window, and the thickness of Copper Foil is 0.025 millimeter to 0.1 millimeter.
In further embodiments, described screen E1 is the enamelled wire that one deck is closely wound around, and the width of screen is identical with the width of skeleton window.
This novel contradiction solved between Switching Power Supply properties of product and cost, has production technology simple, the advantages such as reliability is high, easy operation, and particularly using on low-power power adapter has obvious superiority of effectiveness.Experiment proves, uses the power supply product primary and secondary leakage current of this transformer extremely low, produces interference hardly to consumer.Experiment proves, uses the power supply product of this novel no Y capacitance switching mode power supply transformer to have more than 6dB allowance when meeting electromagnetic interference regulation EN55022 Class B/FCC part15 classB.
Above embodiment is only and illustrates, non-ly provides constraints.Anyly do not depart from the application's spirit and category, and to its equivalent modifications of carrying out or change, among the right that all should be contained in the application.
Claims (7)
1. one kind is applicable to the transformer of Switching Power Supply, comprise skeleton (1), to be inserted in frame center's cavity and the iron core (2) be centered around outside skeleton, it is characterized in that: the bottom coiling armature winding (N1) of described skeleton, the power supply input pin of armature winding and grounding leg are stretched out by the side of skeleton, the grounding leg of armature winding connects iron core by wire, outer side covers one deck screen (E1) of armature winding, this screen connects the grounding leg of armature winding by wire, coiling first secondary winding (N2) and second subprime winding (N3) successively outside screen, the number of turn of the first and second secondary winding, around to identical with phase place.
2. be applicable to the transformer of Switching Power Supply as claimed in claim 1, it is characterized in that: the elementary auxiliary winding (N4) of outside coiling one deck of described second subprime winding (N3), power supply output pin and the grounding leg of elementary auxiliary winding are stretched out by the side of skeleton, and the grounding leg of elementary auxiliary winding connects iron core by wire.
3. be applicable to the transformer of Switching Power Supply as claimed in claim 2, it is characterized in that: between described armature winding (N1) and described screen (E1), be provided with a layer insulating (3).
4. be applicable to the transformer of Switching Power Supply as claimed in claim 3, it is characterized in that: described insulating barrier (3), the first secondary winding (N2), second subprime winding (N3), elementary auxiliary winding (N4), between adjacent layer or winding, be all provided with insulating barrier (3).
5. be applicable to the transformer of Switching Power Supply as claimed in claim 4, it is characterized in that: the width of described armature winding (N1) is identical with the width of skeleton window.
6. the transformer being applicable to Switching Power Supply as described in any one of claim 1 to 5, is characterized in that: described screen (E1) is Copper Foil, and the width of this Copper Foil is identical with the width of skeleton window, and the thickness of Copper Foil is 0.025 millimeter to 0.1 millimeter.
7. the transformer being applicable to Switching Power Supply as described in any one of claim 1 to 5, is characterized in that: the enamelled wire that described screen (E1) is closely wound around for one deck, and the width of screen is identical with the width of skeleton window.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420624792.5U CN204130325U (en) | 2014-10-27 | 2014-10-27 | A kind of transformer being applicable to Switching Power Supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420624792.5U CN204130325U (en) | 2014-10-27 | 2014-10-27 | A kind of transformer being applicable to Switching Power Supply |
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| Publication Number | Publication Date |
|---|---|
| CN204130325U true CN204130325U (en) | 2015-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420624792.5U Active CN204130325U (en) | 2014-10-27 | 2014-10-27 | A kind of transformer being applicable to Switching Power Supply |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108305764A (en) * | 2018-01-19 | 2018-07-20 | 全球能源互联网研究院有限公司 | A kind of dry type high frequency transformer |
| CN108806956A (en) * | 2017-05-05 | 2018-11-13 | 台湾东电化股份有限公司 | Transformer device |
| CN114864240A (en) * | 2022-05-25 | 2022-08-05 | 东科半导体(安徽)股份有限公司 | Planar transformer for inhibiting common-mode interference by adopting auxiliary winding interference cancellation method |
-
2014
- 2014-10-27 CN CN201420624792.5U patent/CN204130325U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108806956A (en) * | 2017-05-05 | 2018-11-13 | 台湾东电化股份有限公司 | Transformer device |
| CN108806956B (en) * | 2017-05-05 | 2021-02-09 | 台湾东电化股份有限公司 | Transformer device |
| CN108305764A (en) * | 2018-01-19 | 2018-07-20 | 全球能源互联网研究院有限公司 | A kind of dry type high frequency transformer |
| CN114864240A (en) * | 2022-05-25 | 2022-08-05 | 东科半导体(安徽)股份有限公司 | Planar transformer for inhibiting common-mode interference by adopting auxiliary winding interference cancellation method |
| CN114864240B (en) * | 2022-05-25 | 2023-10-17 | 东科半导体(安徽)股份有限公司 | Planar transformer for inhibiting common-mode interference by adopting auxiliary winding interference cancellation method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 518000 New Lake Street, Guangming New District, Shenzhen City, Guangdong Province Patentee after: SHENZHEN FRECOM ELECTRONICS CO., LTD. Address before: 518000 Shenzhen Guangming New District, Guangdong Province, Fuchuan rich science and Technology Park Patentee before: SHENZHEN FRECOM ELECTRONICS CO., LTD. |
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| CP02 | Change in the address of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220217 Address after: 423000 No. 18, Jintian Road, bailutang Town, Suxian District, Chenzhou City, Hunan Province Patentee after: Hunan furuikang Electronics Co.,Ltd. Address before: 518000 New Lake Street, Guangming New District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN FRECOM ELECTRONICS Co.,Ltd. |
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| TR01 | Transfer of patent right |