CN211907203U - Power transformer - Google Patents
Power transformer Download PDFInfo
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- CN211907203U CN211907203U CN202020336576.6U CN202020336576U CN211907203U CN 211907203 U CN211907203 U CN 211907203U CN 202020336576 U CN202020336576 U CN 202020336576U CN 211907203 U CN211907203 U CN 211907203U
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- power transformer
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- primary winding
- iron core
- secondary windings
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Abstract
The utility model discloses a power transformer belongs to power electronic technology field. The utility model discloses a power transformer includes: an iron core; the primary winding is wound along the circumferential direction of the iron core; the secondary windings are wound along the circumferential direction of the iron core, are arranged on the outer side, opposite to the iron core, of the primary winding, and are arranged oppositely in a split mode. The utility model discloses a power transformer has adopted the structure of secondary winding split formula, under the condition that does not increase transformer overall dimension, single power transformer can realize one drags two, one drags many, will need the function integration that a plurality of power transformers realized originally in a power transformer, has compressed power transformer shared space in the converter, has realized the requirement of miniaturization, compactification.
Description
Technical Field
The utility model relates to a power electronic technology field, concretely relates to power transformer.
Background
The modularized power unit is an important component of a high-power electronic product, and the power electronic product relates to power conversion products such as rectification, inversion, frequency conversion and the like of high voltage, high power or high voltage and high power.
At present, along with the development of a high-voltage frequency converter, the trend of miniaturization and compactness of the high-voltage frequency converter is more obvious, in the space of a limited complete set of cabinet body of the frequency converter, factors such as insulation distance, copper bar or cable wiring, ventilation and heat dissipation, electrical insulation distance and the like are considered, the layout of each component and element is particularly important, the process requirement is more rigorous, and therefore a power transformer which is more miniaturized and more compact is necessary to be provided.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem of the prior art or partially solve the problem of the prior art, the embodiment of the utility model provides a power transformer that is more miniaturized, compact structure.
The utility model provides a power transformer, include:
an iron core;
the primary winding is wound along the circumferential direction of the iron core;
the secondary winding is arranged on the outer side of the iron core, opposite to the primary winding, and the secondary winding is arranged in a split manner.
Optionally, the at least two secondary windings are arranged in an axially split manner or in a radially split manner with respect to the core.
Optionally, a first insulating isolation layer is disposed between the primary winding and the at least two secondary windings, so that a first preset electrical distance is provided between the primary winding and the at least two secondary windings.
Optionally, the first insulating isolation layer is formed by epoxy resin encapsulation or insulating silica gel encapsulation.
Optionally, a second insulating isolation layer is arranged between the at least two secondary windings, so that a second preset electrical distance is reserved between the at least two secondary windings.
Optionally, the second insulating isolation layer is formed by epoxy resin encapsulation or insulating silica gel encapsulation.
Optionally, the secondary windings include two secondary windings, and the two secondary windings are axially split with respect to the iron core.
Optionally, the iron core further comprises a base, and the iron core is fixedly arranged on the base.
Optionally, the iron core and the base are grounded.
Optionally, the core is a wound core.
The utility model has the advantages that:
the utility model provides a power transformer, include: an iron core; the primary winding is wound along the circumferential direction of the iron core; the secondary winding is arranged on the outer side of the iron core, opposite to the primary winding, and the secondary winding is arranged in a split manner. The utility model discloses a power transformer has adopted the structure of secondary winding split formula, under the condition that does not increase transformer overall dimension, single power transformer can realize one drags two, one drags many, will need the function integration that a plurality of power transformers realized originally in a power transformer, has compressed power transformer shared space in the converter, has realized the requirement of miniaturization, compactification.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a power transformer according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a power transformer according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a power transformer according to another embodiment of the present invention.
Wherein the correspondence between the reference numbers and the names of the components in fig. 1 to 3 is:
1. an iron core; 2. a primary winding; 20. a primary winding lead-out wire; 3. a secondary winding; 30. a secondary winding lead-out wire; 4. a base; 40. and (6) installing hole sites.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
The embodiment of the utility model provides a power transformer, power unit control part's such as the high-power dc-to-ac converter of mainly used high pressure and switching power supply power circuit, of course, technical staff's in the field general knowledge can with the utility model discloses the power transformer that the embodiment discloses uses on other part or device, and these simple changes should belong to within the scope of protection of the utility model.
Next, refer to fig. 1 to 3 to explain in detail the power transformer of the embodiment of the present invention, as fig. 1, show the structure diagram of the power transformer of the first embodiment of the present invention, as fig. 2, show the structure diagram of the power transformer of the first embodiment of the present invention, as fig. 3, show the structure diagram of the power transformer of the second embodiment of the present invention, refer to fig. 1 to 3, the embodiment of the present invention provides a power transformer, including iron core 1, primary winding 2 and at least two secondary windings 3, primary winding 2 along the winding of iron core circumferencial direction, at least two secondary windings 3 set up in the outside of primary winding 2 for iron core 1, and at least two secondary windings 3 split relatively set up.
The embodiment of the utility model provides an in, iron core 1, primary winding 2, secondary winding 3 set up from interior to exterior in proper order, have primary winding lead-out wire 20 on the primary winding 2, and primary winding lead-out wire 20 is used for connecting input power, all has secondary winding lead-out wire 30 on every secondary winding 3, and secondary winding lead-out wire 30 is used for connecting other power unit, in order to give the power unit power supply. Traditional power transformer, when using, every power unit need be equipped with a power transformer alone, thereby make the volume of holistic equipment too big, and in this embodiment, a power transformer can be simultaneously for two at least power unit power supplies, after primary winding lead-out wire 20 has connected the input power promptly, if primary winding 2 cooperates two secondary winding 3 that are the split setting, two secondary winding 3 connect the power unit respectively, a power transformer realizes the effect of one drags two promptly, and the same reason, if a plurality of secondary winding 3 that are the split setting of primary winding 2 cooperation, a plurality of secondary winding 3 connect the power unit respectively, a power transformer realizes the effect of one drags more promptly, consequently, reduce power transformer's quantity, thereby reduced the holistic volume of equipment, realized the more compact purpose of structure.
In one embodiment, the primary winding outlet 20 can be connected to the commercial power, i.e. 220V ac power, and the secondary winding 3 acts with the primary winding 2 to transform the 220V ac power into 20V ac power and output the power through the secondary winding outlet 30. It should be noted that, in this embodiment, although the input side voltage and the output side voltage of the power transformer are not greatly different, in practical applications, the input side potential and the output side potential of the power transformer may be different by hundreds of volts, thousands of volts, or even more, and when the input side potential and the output side potential of the power transformer are greatly different, the primary winding 2 and the secondary winding 3 may break through the medium therebetween to interfere with each other.
In view of the above problems, in a conventional power transformer, when the power transformer is used, an input side of the power transformer needs a high potential and cannot be connected to an input power source at a low potential. In the embodiment of the present invention, a first insulation isolation layer is disposed between the primary winding 2 and the secondary winding 3, so that a first preset electrical distance is provided between the primary winding 2 and the secondary winding 3. In one embodiment, the first insulating isolation layer is formed by epoxy resin encapsulation or insulating silicon encapsulation.
In this embodiment, the electrical isolation performance between the primary winding 2 and the secondary winding 3 is improved by the arrangement of the first insulation isolation layer, so that the primary winding 2 is connected to the mains supply or other low-potential input power supplies, and when the secondary winding 3 is connected to the high-potential power unit, even if a higher potential difference exists between the primary winding 2 and the secondary winding 3, the isolation performance between the primary winding 2 and the secondary winding 3 can still be ensured, and the mutual interference between the primary winding 2 and the secondary winding 3 is avoided. The electrical distance is: during live working, air gap distances with small probability of discharge occur between live parts and/or between the live parts and the grounding part. In this embodiment, the first predetermined electrical distance is determined according to the potential of the input side to which the primary winding 2 is connected, the potential of the output side to which the secondary winding 3 is connected, and the material and thickness of the first insulating layer, so, in order to meet the requirements of miniaturization and compactness of the power transformer, the first insulating layer should be made of a material having the best possible insulating effect to reduce the electrical distance between the primary winding 2 and the secondary winding 3.
By adopting the power transformer of the embodiment, a high-voltage driving power supply and a low-voltage control power supply of power electronic devices such as a high-power inverter can be distinguished, namely, a high-potential voltage part of a power unit is independent from a control power supply voltage part, the state monitoring and control waveform monitoring of the power unit can be realized even under the condition that no high-voltage power supply is input, the monitoring and monitoring of the whole system control part including the power unit can be carried out after the system is not debugged or is in fault shutdown, the output waveform of a power loop can be checked and debugged under the condition of the low-voltage power supply, and the maintenance and debugging work is greatly facilitated.
High-voltage inverter is the utility model discloses an occasion that power transformer used of example, high-voltage inverter generally adopts the mode of a plurality of power unit series connection to realize high-voltage frequency conversion output, it is by moving rectifier transformer, power unit, controller and switch annex and constitute, this kind moves the cascade connection formula high-voltage inverter that moves phase and has adopted a plurality of independent power unit series connection, in prior art, need be equipped with an independent power transformer through every independent power unit, and adopt the utility model discloses a power transformer can realize two or a plurality of power unit of a power transformer drive to show ground and reduced power transformer's quantity, reduced the holistic volume of equipment, realize the compactification of structure.
It should be noted that, in the high-voltage inverter, there is interelectrode voltage between power unit and the power unit, has the potential difference between cascaded each power unit promptly, and alternate rank between two power units is more, and interelectrode voltage is just big more, consequently, the utility model discloses when power transformer drives a plurality of power units simultaneously, there is the potential difference between a plurality of secondary winding 3 of power transformer, if this potential difference is too big, can puncture medium between the two, and make mutual interference between the secondary winding 3.
In order to solve the problem of potential difference between the secondary windings, a second insulating isolation layer is further arranged between the at least two secondary windings 3, so that a second preset electrical distance is reserved between the at least two secondary windings 3. In one embodiment, the second insulating isolation layer is formed by epoxy resin encapsulation or insulating silica gel encapsulation.
In this embodiment, through the arrangement of the second insulating isolation layer, the electrical isolation between the secondary windings 3 is improved, mutual interference between the secondary windings 3 due to inter-electrode voltage is avoided, and it is ensured that each secondary winding 3 can respectively drive the corresponding power unit to operate without being affected by the inter-electrode voltage between the power units, wherein the second preset electrical distance is determined according to the inter-electrode voltage between the power units to be connected and the material and thickness of the second insulating isolation layer.
It should be noted that the greater the number of secondary windings 3, the greater the influence of the interpolar voltage on the secondary windings 3, the higher the requirement for the second insulating barrier, and therefore the number of secondary windings 3 is preferably 2 or 3, although in alternative embodiments the number of secondary windings 3 may be greater, but in this case the interpolar voltage between the secondary windings 3 may be up to several kilovolts, requiring the second insulating barrier to have sufficient insulating properties to ensure the second predetermined electrical distance.
Referring to fig. 1, the utility model discloses power transformer still includes base 4, and base 4 is used for iron core 1, primary winding 2 and secondary winding 3's installation and fixed, as fig. 1, iron core 1 sets firmly on base 4, still is provided with installation hole site 40 on base 4, when installing, and base 4 passes through installation hole site 40 fastening on the regulator cubicle to make base 4 and regulator cubicle together ground, iron core 1 links to each other with base 4, so iron core 1 and base 4 together ground.
In an embodiment, iron core 1 is for rolling up the iron core, rolls up the characteristics that the iron core has high power, low loss, can improve the utility model discloses power transformer's power reduces the loss.
The utility model discloses power transformer compares in traditional power transformer, adopts the structure of a plurality of secondary winding schizonts formula, realizes a plurality of power unit of power transformer drive to holistic miniaturization and compactification's effect has been realized, wherein, in the embodiment of difference, can adopt radial fission or axial fission's structure between two at least secondary windings.
It should be noted that, according to conventional technical means, a person skilled in the art can combine the structure of radial splitting and the structure of axial splitting of the secondary winding, and such a simple transformation shall fall within the scope of the present invention.
The utility model discloses a power transformer compares in traditional power transformer and has following advantage:
1. the split structure of a plurality of secondary windings is adopted, so that one power transformer drives a plurality of power units, the number of the power transformers is reduced, the overall size is further reduced, and the structure is more compact;
2. the first insulating isolation layer is arranged between the primary winding and the secondary winding so as to improve the electrical isolation performance between the primary winding and the secondary winding, and the primary winding can still normally work even if the primary winding is connected with an input power supply with low potential under the condition that the secondary winding acts on a high potential side, so that the power transformer of the utility model is not influenced by the potential difference of the input end and the output end, and is more convenient and wide in application;
3. set up the second insulating isolation layer between each secondary winding to promote the electrical isolation performance between the secondary winding, thereby avoid each secondary winding to the influence of interelectrode voltage when different power unit supplies power, guarantee that power transformer is not influenced by interelectrode voltage when realizing that one drags many.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the communication may be direct, indirect via an intermediate medium, or internal to both elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. A power transformer, comprising:
an iron core;
the primary winding is wound along the circumferential direction of the iron core;
the secondary winding is arranged on the outer side of the iron core, opposite to the primary winding, and the secondary winding is arranged in a split manner.
2. The power transformer according to claim 1, wherein the at least two secondary windings are arranged in an axially split arrangement or in a radially split arrangement with respect to the core.
3. The power transformer of claim 2, wherein a first insulating isolation layer is disposed between the primary winding and the at least two secondary windings to provide a first predetermined electrical distance between the primary winding and the at least two secondary windings.
4. The power transformer of claim 3, wherein the first insulating isolation layer is formed by epoxy resin encapsulation or insulating silica gel encapsulation.
5. The power transformer of claim 2, wherein the at least two secondary windings have a second insulating spacer layer therebetween to provide a second predetermined electrical distance between the at least two secondary windings.
6. The power transformer of claim 5, wherein the second insulating isolation layer is formed by epoxy resin encapsulation or insulating silica gel encapsulation.
7. The power transformer of claim 1, wherein the secondary windings comprise two, and the two secondary windings are axially split with respect to the core.
8. The power transformer of claim 1, further comprising a base, wherein the core is fixedly disposed on the base.
9. The power transformer of claim 8, wherein the core is grounded to the base.
10. The power transformer of claim 1, wherein the core is a wound core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020336576.6U CN211907203U (en) | 2020-03-17 | 2020-03-17 | Power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020336576.6U CN211907203U (en) | 2020-03-17 | 2020-03-17 | Power transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211907203U true CN211907203U (en) | 2020-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020336576.6U Active CN211907203U (en) | 2020-03-17 | 2020-03-17 | Power transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211907203U (en) |
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2020
- 2020-03-17 CN CN202020336576.6U patent/CN211907203U/en active Active
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