CN202839258U - Transformer for switching power source - Google Patents
Transformer for switching power source Download PDFInfo
- Publication number
- CN202839258U CN202839258U CN 201220443406 CN201220443406U CN202839258U CN 202839258 U CN202839258 U CN 202839258U CN 201220443406 CN201220443406 CN 201220443406 CN 201220443406 U CN201220443406 U CN 201220443406U CN 202839258 U CN202839258 U CN 202839258U
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- Prior art keywords
- winding
- magnetic core
- transformer
- switching power
- power source
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Abstract
The utility model discloses a transformer for a switching power source. The transformer for the switching source comprises a magnetic core and a magnetic core wrap arranged in the magnetic core. The magnetic core wrap comprises a winding skeleton and a primary winding, a primary offset winding, a primary shield winding and a secondary winding, wherein the primary winding, the primary offset winding, the primary shield winding and the secondary winding are winded in sequence from inside to outside by using the winding skeleton as a center. The periphery of the magnetic core is provided with a magnetic core shield winding in a winding mode. The magnetic core shield winding is connected with a ground lead. According to the transformer for the switching power source, a traditional winding method that a transformer magnetic core shield winding of the switching power source is arranged inside the magnetic core is replaced by the method of arranging the transformer magnetic core shield winding of the switching power source outside the magnetic core, and the transformer for the switching power source has the advantages of reducing the number of the winding in the magnetic core, enlarging winding window area, enabling winding process of the transformer to be simple, achieving improving production efficiency and rate of finished products at the same time of satisfying requirements of an electro magnetic compatibility (EMC) test, reducing production cost, and therefore the transformer for the switching power source is applicable to mass production.
Description
Technical field
The utility model belongs to field transformer, relates in particular to the transformer for switching power supply with coiling wire winding on iron core.
Background technology
Electromagnetic compatibility (EMC) refers to that the operation that meets the requirements of equipment or system does not produce the ability of intolerable electromagnetic interference to any equipment in its environment in its electromagnetic environment.Because the transformer main member in the Switching Power Supply is primary coil, secondary coil and magnetic core.Therefore Switching Power Supply all needs to increase magnetic core shielding winding and primary shield winding to satisfy the demand of electromagnetic compatibility (EMC) when Design of Transformer.The winding method of existing switching mode power supply transformer normally shields winding and magnetic core is shielded winding at magnetic core innermost layer wound core and is connected to elementary ground wire, and then coiling is elementary successively puts on the spot, elementary biasing winding, primary shield winding, last coiling secondary winding.Such structure is easy to the test by EMC.Window area is too little but such winding method makes the magnetic core coiling, just can cause the transformer winding difficulty when winding is too much in the magnetic core, and rate of finished products and production efficiency reduce, and causes production cost to improve.
Therefore be necessary to provide a kind of transformer for switching power supply that improves rate of finished products and production efficiency, reduces production costs, is suitable for producing in batches.
The utility model content
The transformer for switching power supply that the utility model embodiment provides a kind of raising rate of finished products that improves rate of finished products and production efficiency, reduces production costs, is suitable for producing in batches and production efficiency, reduced production costs, is suitable for producing in batches.
According to embodiment of the present utility model, a kind of transformer for switching power supply is provided, comprise magnetic core and be arranged at the interior magnetic core bag of magnetic core, described magnetic core bag comprises the coiling skeleton and the from inside to outside successively armature winding of coiling, elementary biasing winding, primary shield winding and secondary winding centered by the coiling skeleton, it is characterized in that
Described magnetic core periphery is wound with magnetic core shielding winding, and described magnetic core shielding winding is connected with ground wire.
Preferably, between described armature winding, elementary biasing winding, primary shield winding and the secondary winding insulating barrier is set respectively, also is provided with insulating barrier between described secondary winding and the magnetic core inwall.
Wherein, described insulating barrier is insulating tape.
Preferably, be respectively equipped with insulating barrier between described armature winding, elementary biasing winding, primary shield winding and the secondary winding, described secondary winding utilizes the triple insulated wire coiling.
Between described magnetic core bag and the upper and lower inwall of magnetic core the insulation barricade is set.
Wherein, described insulation barricade is insulating tape.
Described coiling skeleton is plastic skeleton.
By above technical scheme as can be known, the winding method that the utility model is arranged at magnetic core inside with traditional switching mode power supply transformer magnetic core shielding winding is changed into and is arranged at the magnetic core outside, reduced the winding number of magnetic core inside, strengthened the coiling window area, so that transformer winding technique is simple.Therefore the utility model has improved production efficiency and rate of finished products when satisfying the EMC test request, has reduced production cost, is suitable for batch production.
Description of drawings
Fig. 1 is the structural representation of transformer for switching power supply among the embodiment 1;
Fig. 2 is the structural representation of transformer for switching power supply among the embodiment 2.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, referring to accompanying drawing and enumerate embodiment, the utility model is further described.
Embodiment 1:
Fig. 1 shows the structural representation of transformer for switching power supply among the embodiment 1.As shown in Figure 1, transformer for switching power supply comprises magnetic core 1 and the magnetic core bag that is arranged at magnetic core 1 inside.The magnetic core bag comprises the armature winding 3 of coiling skeleton 2 and from inside to outside successively coiling centered by coiling skeleton 2, elementary biasing winding 4, primary shield winding 5 and secondary winding 6.Coiling skeleton 2 can be selected plastic skeleton.Utilize insulating barrier 7 isolation between armature winding 3, elementary biasing winding 4, primary shield winding 5 and the secondary winding 6, secondary winding 6 peripheries also are provided with insulating barrier 7, are used for and the isolation of magnetic core 1 inwall.The upper and lower end of magnetic core 1 inner magnetic core bag is respectively equipped with insulation barricade 8.In the present embodiment, insulating barrier 7 can adopt insulating tape, and insulation barricade 8 is the insulating tape barricade.Certainly, it is a kind of implementation in the present embodiment that insulating barrier 7 and insulation barricade 8 all adopt insulating tape, insulating barrier 7 or the insulation barricade 8 every purposes that can isolate each winding and reach insulation of utilizing other insulating material to make all fall within the scope of the present embodiment.Be wound with magnetic core shielding winding 9 in magnetic core 1 periphery, magnetic core shielding winding 9 is connected with ground wire.
The below does the winding technique method of the transformer for switching power supply in the present embodiment and elaborates.
Coiling armature winding 3 on coiling skeleton 2 at first twines one deck insulating tape in the periphery after armature winding 3 coilings are finished;
The insulating tape of armature winding 3 peripheries twine complete after the then elementary biasing winding 4 of coiling, then twine one deck insulating tape after elementary biasing winding 4 coilings are finished in the periphery;
The insulating tape of elementary biasing winding 4 peripheries twines complete rear then coiling primary shield winding 5, and one deck insulating tape was twined in continuation after 5 coilings of primary shield winding were finished;
The insulating tape of primary shield winding 5 peripheries twine complete after then coiling secondary winding 6, after secondary winding 6 coilings are finished between the periphery of secondary winding 6 and magnetic core 1 inwall coiling one deck insulating tape again;
So far, the magnetic core wrapping is finished.
In magnetic core 1 bottom the insulating tape barricade is set, then the magnetic core bag is put into magnetic core 1 inside, the magnetic core bag installs afterwards at magnetic core 1 top installing insulating adhesive tape barricade.After the insulating tape barricade installs, check whether the insulating tape of whole winding and magnetic core bag meets the safety requirement.
After the insulating tape of whole winding and magnetic core bag meets the safety requirement, at magnetic core 1 outside wound core shielding winding 9.
Embodiment 2:
The structure basic simlarity of embodiment 2 and embodiment 1, its difference be, the secondary winding 6 in the present embodiment utilizes the triple insulated wire coiling.Fig. 2 shows the structural representation of transformer for switching power supply in this enforcement.As shown in Figure 2, because secondary winding 6 utilizes the triple insulated wire coiling, so the upper and lower side of the magnetic core in the present embodiment 1 does not need to arrange the insulating tape barricade again.
The winding method of each winding is all identical except secondary winding 6 usefulness triple insulated wire coilings among the winding technique method of the transformer for switching power supply among the embodiment 2 and the embodiment 1, therefore repeats no more herein.
By above each embodiment as can be known, the utility model shields winding 9 with magnetic core and is arranged at magnetic core 1 outside, thereby has reduced the winding number of magnetic core 1 inside, has strengthened the coiling window area, so that transformer winding technique is simple.Therefore the utility model has improved production efficiency and rate of finished products when satisfying the EMC test request, has reduced production cost, is suitable for batch production.
The above only is preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (7)
1. transformer for switching power supply, comprise magnetic core and be arranged at the interior magnetic core bag of magnetic core, described magnetic core bag comprise the coiling skeleton and centered by the coiling skeleton the from inside to outside successively armature winding of coiling, elementary biasing winding, primary shield winding and secondary winding, it is characterized in that
Described magnetic core periphery is wound with magnetic core shielding winding, and described magnetic core shielding winding is connected with ground wire.
2. transformer for switching power supply as claimed in claim 1 is characterized in that, between described armature winding, elementary biasing winding, primary shield winding and the secondary winding insulating barrier is set respectively, also is provided with insulating barrier between described secondary winding and the magnetic core inwall.
3. transformer for switching power supply as claimed in claim 2 is characterized in that, described insulating barrier is insulating tape.
4. transformer for switching power supply as claimed in claim 1 is characterized in that, is respectively equipped with insulating barrier between described armature winding, elementary biasing winding, primary shield winding and the secondary winding, and described secondary winding utilizes the triple insulated wire coiling.
5. transformer for switching power supply as claimed in claim 2 or claim 3 is characterized in that, between described magnetic core bag and the upper and lower inwall of magnetic core the insulation barricade is set.
6. transformer for switching power supply as claimed in claim 5 is characterized in that, described insulation barricade is insulating tape.
7. transformer for switching power supply as claimed in claim 1 is characterized in that, described coiling skeleton is plastic skeleton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220443406 CN202839258U (en) | 2012-08-31 | 2012-08-31 | Transformer for switching power source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220443406 CN202839258U (en) | 2012-08-31 | 2012-08-31 | Transformer for switching power source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202839258U true CN202839258U (en) | 2013-03-27 |
Family
ID=47950902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220443406 Expired - Fee Related CN202839258U (en) | 2012-08-31 | 2012-08-31 | Transformer for switching power source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202839258U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106158302A (en) * | 2015-04-17 | 2016-11-23 | 上海飞晶电气股份有限公司 | A kind of combined mechanism for eliminating amorphous transformer discharging sound |
| CN107112114A (en) * | 2014-11-03 | 2017-08-29 | 哈勃股份有限公司 | Essential safety transformer |
-
2012
- 2012-08-31 CN CN 201220443406 patent/CN202839258U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107112114A (en) * | 2014-11-03 | 2017-08-29 | 哈勃股份有限公司 | Essential safety transformer |
| CN106158302A (en) * | 2015-04-17 | 2016-11-23 | 上海飞晶电气股份有限公司 | A kind of combined mechanism for eliminating amorphous transformer discharging sound |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20200831 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |