CN205595196U - Switching power supply's transformer - Google Patents
Switching power supply's transformer Download PDFInfo
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- CN205595196U CN205595196U CN201620407444.1U CN201620407444U CN205595196U CN 205595196 U CN205595196 U CN 205595196U CN 201620407444 U CN201620407444 U CN 201620407444U CN 205595196 U CN205595196 U CN 205595196U
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- coil
- primary coil
- secondary coil
- ancillary
- power supply
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Abstract
The utility model provides a switching power supply's transformer, the transformer includes skeleton, magnetic core, primary, secondary coil, ancillary coil, shielding layer and electric tape layer, its characterized in that: the magnetic core is inlayed on the skeleton, primary includes inlayer primary and outer primary, inlayer primary is from winding on the magnetic core, ancillary coil is around on inlayer primary, secondary coil is around on ancillary coil, the shielding layer covers on secondary coil, outer primary is around on the shielding layer, the electric tape layer sets up between inlayer primary and ancillary coil, between ancillary coil and the secondary coil, between secondary coil and the shielding layer, between shielding layer and the outer primary, the utility model discloses a just, secondary coil's structure distributes, can make most noise current cancel each other out, at the beginning of the setting on shielding layer and electric tape layer can effectively be blocked, the electromagnetic interference between the secondary coil to switching mode power supply transformer's electromagnetic compatibility has been improved.
Description
Technical field
This utility model relates to the transformator of a kind of Switching Power Supply, the switching mode power supply transformer that a kind of effective anti-electromagnetic interference, raising Switching Power Supply electromagnetism are compatible.
Background technology
Switching Power Supply is as the modern life and the most universal industrial a kind of product, along with switching frequency constantly improves, its Electromagnetic Compatibility also becomes increasingly by one of important parameter of concern, emc issue is mainly derived from electromagnetic interference (EMI) noise, and electromagnetic interference noise is mainly conducted by the distribution capacity between the primary and secondary coil of transformator.
At present, the method solving emc issue mainly can effectively suppress electromagnetic interference noise at the input of power supply installation wave filter, but can increase cost, and wave filter can take bigger space simultaneously so that the volume of Switching Power Supply increases；Also have and metallic spacer is set between the primary and secondary coil of transformator, reduce the electromagnetic interference that the distribution capacity between primary and secondary coil produces, metallic spacer is directly grounded, and so can increase work mode noise electric current, and the Electro Magnetic Compatibility of transformator can be made equally to be deteriorated.
Summary of the invention
The purpose of this utility model is to overcome the shortcoming of prior art, it is provided that the transformator of a kind of Switching Power Supply, and this kind of novel structure, manufacture method simply, can the most anti-electromagnetic interference, raising Switching Power Supply electromagnetism compatibility.
For realizing above technical purpose, the technical solution adopted in the utility model is: the transformator of a kind of Switching Power Supply, including skeleton, magnetic core, primary coil, secondary coil, ancillary coil and screen layer, it is characterized in that: the described skeleton left and right sides is equipped with the pin for lead-out wire astragal head, left side includes five pins, it is respectively primary coil non-same polarity, empty foot, primary coil Same Name of Ends, ancillary coil non-same polarity and ancillary coil Same Name of Ends, right side includes two pins, including secondary coil non-same polarity and secondary coil Same Name of Ends；Described magnetic core is embedded on skeleton, described primary coil includes inner primary coil and outer primary coil, described inner primary coil starts close being wound on skeleton from primary coil Same Name of Ends, other end the end of a thread inflection is fixed on sky foot, described ancillary coil starts uniformly to dissipate to be wound on inner primary coil from ancillary coil non-same polarity, other end the end of a thread inflection is fixed to ancillary coil Same Name of Ends, described secondary coil starts close being wound on ancillary coil from secondary coil non-same polarity, other end the end of a thread inflection is fixed on secondary coil Same Name of Ends, described screen layer covers on the secondary winding, described outer primary coil starts close around on the shielding layer from empty foot, other end the end of a thread is fixed on primary coil non-same polarity.
As improvement, also include insulating cement belt, described insulating cement belt totally 4, be separately positioned between inner primary coil and ancillary coil, between ancillary coil and secondary coil, between secondary coil and screen layer, between screen layer and outer primary coil.
Further, described inner primary coil and outer primary coil are by empty foot is end to end and wire circle is suitable.
Further, described magnetic core is FERRITE CORE, and described FERRITE CORE is that symmetrical two E fonts are spliced.
As improvement, the coil of described primary coil and ancillary coil is enamel-covered wire, and the wire of described enamel-covered wire is copper cash, and the coil of described secondary coil is three layer insulation wire, and the center conductor of described three layer insulation wire is copper cash.
As improvement, described screen layer is copper strips, and described copper strips is the most disjoint posting on the secondary winding.
As improvement, described insulating cement belt includes that three-layer insulated adhesive tape, described insulating tape are wrapped on corresponding coil.
As can be seen from the above description, the beneficial effects of the utility model are: the defect existed for prior art, the distributed architecture of the primary and secondary coil that this utility model uses, can make major part noise current cancel out each other, thus reduce the noise current being eventually coupled to secondary coil；The screen layer arranged between primary and secondary coil and insulating tape, can be effectively isolated primary and secondary coil, thus can reduce the parasitic capacitance between primary and secondary coil, effectively blocks the propagation of electromagnetic interference noise, improves Electro Magnetic Compatibility.
Accompanying drawing explanation
Fig. 1 is cross-sectional view of the present utility model.
Fig. 2 is skeleton pin configuration schematic diagram of the present utility model.
Fig. 3 (a) is the noise pattern of the switching mode power supply transformer of prior art, and Fig. 3 (b) is the noise pattern of switching mode power supply transformer of the present utility model.
Accompanying drawing illustrates: 1-skeleton, 1.1-primary coil non-same polarity, 1.2-sky foot, 1.3-primary coil Same Name of Ends, 1.4-ancillary coil non-same polarity, 1.5-ancillary coil Same Name of Ends, 1.6-secondary coil non-same polarity, 1.7-secondary coil Same Name of Ends, 2-magnetic core, 3-primary coil, 3.1-inner primary coil, 3.2-outer primary coil, 4-secondary coil, 5-ancillary coil, 6-screen layer, 7-insulating cement belt.
Detailed description of the invention
Below in conjunction with concrete drawings and Examples, the utility model is described in further detail.
With reference to the accompanying drawings shown in 1, the transformator of a kind of Switching Power Supply that this utility model is proposed, including skeleton 1, magnetic core 2, primary coil 3, secondary coil 4, ancillary coil 5 and screen layer 6, it is characterized in that: described skeleton 1 left and right sides is equipped with the pin for lead-out wire astragal head, left side includes five pins, it is respectively primary coil non-same polarity 1.1, empty foot 1.2, primary coil Same Name of Ends 1.3, ancillary coil non-same polarity 1.4 and ancillary coil Same Name of Ends 1.5, right side includes two pins, including secondary coil non-same polarity 1.6 and secondary coil Same Name of Ends 1.7；nullDescribed magnetic core 2 is embedded on skeleton 1，Described primary coil 3 includes inner primary coil 3.1 and outer primary coil 3.2，Described inner primary coil 3.1 starts close being wound on skeleton 1 from primary coil Same Name of Ends 1.3，Other end the end of a thread inflection is fixed on sky foot 1.2，Described ancillary coil 5 starts uniformly to dissipate to be wound on inner primary coil 3.1 from ancillary coil non-same polarity 1.4，Other end the end of a thread inflection is fixed to ancillary coil Same Name of Ends 1.5，Described secondary coil 4 starts close being wound on ancillary coil 5 from secondary coil non-same polarity 1.6，Other end the end of a thread inflection is fixed on secondary coil Same Name of Ends 1.7，Described screen layer 6 covers on secondary coil 4，Described outer primary coil 3.2 starts close being wound on screen layer 6 from empty foot 1.2，Other end the end of a thread is fixed on primary coil non-same polarity 1.1 and also includes insulating cement belt 7，Described insulating cement belt 7 totally 4，It is separately positioned between inner primary coil 3.1 and ancillary coil 5、Between ancillary coil 5 and secondary coil 4、Between secondary coil 4 and screen layer 6、Between screen layer 6 and outer primary coil 3.2.
Described magnetic core 2 is FERRITE CORE, and described FERRITE CORE is that symmetrical two E fonts are spliced.
Described inner primary coil 3.1 and outer primary coil 3.2 are by empty foot 1.2 is end to end and wire circle is suitable.
The coil of described primary coil 3 and ancillary coil 5 is enamel-covered wire, and the wire of described enamel-covered wire is copper cash, and the coil of described secondary coil 4 is three layer insulation wire, and the center conductor of described three layer insulation wire is copper cash.
Described screen layer 6 is copper strips, and described copper strips is the most disjoint posting on secondary coil 4.
Described insulating cement belt 7 includes that three-layer insulated adhesive tape, described insulating tape are wrapped on corresponding coil.
With reference to the accompanying drawings shown in 1, first, inner primary coil 3.1 and the distribution of outer primary coil 3.2 structure, major part noise current can be made to cancel out each other, thus reduce the noise current being eventually coupled to secondary coil 4, secondly, ancillary coil 5 it is provided with between inner primary coil 3.1 and secondary coil 4, screen layer 6 it is provided with between secondary coil 4 and outer primary coil 3.2, all can effectively reduce electromagnetic interference, it addition, the setting of insulating cement belt 7 also can reduce the parasitic capacitance between primary and secondary coil and electromagnetic interference, thus improve the Electro Magnetic Compatibility of transformator.
Accompanying drawing 3(a) it is the noise pattern of the switching mode power supply transformer of prior art, accompanying drawing 3(b) it is the noise pattern of switching voltage of the present utility model, compared with prior art, the noise of transformator of the present utility model is significant lower, reduce about 10-15 Db, illustrate that this transformator can effectively suppress the conduction of noise；This utility model transformator is less along with the increase noise fluctuations of frequency, illustrates that this transformer performance is stable.
Being described this utility model and embodiment thereof above, this description does not has restricted, and shown in accompanying drawing is also one of embodiment of the present utility model, and actual structure is not limited thereto.If those of ordinary skill in the art is enlightened by it, in the case of creating objective without departing from this utility model, design the frame mode similar to this technical scheme and embodiment without creative, protection domain of the present utility model all should be belonged to.
Claims (7)
1. the transformator of a Switching Power Supply, described transformator includes skeleton (1), magnetic core (2), primary coil (3), secondary coil (4), ancillary coil (5) and screen layer (6), it is characterized in that: described skeleton (1) left and right sides is equipped with the pin for lead-out wire astragal head, left side includes five pins, it is respectively primary coil non-same polarity (1.1), empty foot (1.2), primary coil Same Name of Ends (1.3), ancillary coil non-same polarity (1.4) and ancillary coil Same Name of Ends (1.5), right side includes two pins, it is respectively secondary coil non-same polarity (1.6) and secondary coil Same Name of Ends (1.7)；nullDescribed magnetic core (2) is embedded on skeleton (1)，Described primary coil (3) includes inner primary coil (3.1) and outer primary coil (3.2)，Described inner primary coil (3.1) starts close being wound on skeleton (1) from primary coil Same Name of Ends (1.3)，Other end the end of a thread inflection is fixed on sky foot (1.2)，Described ancillary coil (5) starts uniformly to dissipate to be wound on inner primary coil (3.1) from ancillary coil non-same polarity (1.4)，Other end the end of a thread inflection is fixed to ancillary coil Same Name of Ends (1.5)，Described secondary coil (4) starts close being wound on ancillary coil (5) from secondary coil non-same polarity (1.6)，Other end the end of a thread inflection is fixed on secondary coil Same Name of Ends (1.7)，Described screen layer (6) covers on secondary coil (4)，Described outer primary coil (3.2) starts close being wound on screen layer (6) from empty foot (1.2)，Other end the end of a thread is fixed on primary coil non-same polarity (1.1).
The transformator of a kind of Switching Power Supply the most according to claim 1, it is characterized in that: also include insulating cement belt (7), described insulating cement belt (7) totally 4, is separately positioned between inner primary coil (3.1) and ancillary coil (5), between ancillary coil (5) and secondary coil (4), between secondary coil (4) and screen layer (6), between screen layer (6) and outer primary coil (3.2).
The transformator of a kind of Switching Power Supply the most according to claim 1, it is characterised in that: described inner primary coil (3.1) and outer primary coil (3.2) they are by empty foot (1.2) is end to end and wire circle is suitable.
The transformator of a kind of Switching Power Supply the most according to claim 1, it is characterised in that: described magnetic core (2) is FERRITE CORE, and described FERRITE CORE is that symmetrical two E fonts are spliced.
The transformator of a kind of Switching Power Supply the most according to claim 1, it is characterized in that: the coil of described primary coil (3) and ancillary coil (5) is enamel-covered wire, the wire of described enamel-covered wire is copper cash, the coil of described secondary coil (4) is three layer insulation wire, and the center conductor of described three layer insulation wire is copper cash.
The transformator of a kind of Switching Power Supply the most according to claim 1, it is characterised in that: described screen layer (6) is copper strips, and described copper strips is the most disjoint posting on secondary coil (4).
The transformator of a kind of Switching Power Supply the most according to claim 2, it is characterised in that: described insulating cement belt (7) includes that three-layer insulated adhesive tape, described insulating tape are wrapped on corresponding coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620407444.1U CN205595196U (en) | 2016-05-09 | 2016-05-09 | Switching power supply's transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620407444.1U CN205595196U (en) | 2016-05-09 | 2016-05-09 | Switching power supply's transformer |
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| Publication Number | Publication Date |
|---|---|
| CN205595196U true CN205595196U (en) | 2016-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620407444.1U Active CN205595196U (en) | 2016-05-09 | 2016-05-09 | Switching power supply's transformer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107147093A (en) * | 2017-04-28 | 2017-09-08 | 东莞市奥海电源科技有限公司 | Applied to the anti thunder strike circuit in large power supply adapter and the power supply adaptor |
| CN113012904A (en) * | 2021-03-15 | 2021-06-22 | 广东迅扬科技股份有限公司 | Semi-winding main transformer and winding method thereof |
-
2016
- 2016-05-09 CN CN201620407444.1U patent/CN205595196U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107147093A (en) * | 2017-04-28 | 2017-09-08 | 东莞市奥海电源科技有限公司 | Applied to the anti thunder strike circuit in large power supply adapter and the power supply adaptor |
| CN113012904A (en) * | 2021-03-15 | 2021-06-22 | 广东迅扬科技股份有限公司 | Semi-winding main transformer and winding method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |