CN220155348U - Isolation driving transformer - Google Patents
Isolation driving transformer Download PDFInfo
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- CN220155348U CN220155348U CN202321315405.5U CN202321315405U CN220155348U CN 220155348 U CN220155348 U CN 220155348U CN 202321315405 U CN202321315405 U CN 202321315405U CN 220155348 U CN220155348 U CN 220155348U
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- magnetic core
- annular magnetic
- primary
- pins
- insulating shell
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- 238000002955 isolation Methods 0.000 title claims abstract description 11
- 238000004804 winding Methods 0.000 claims abstract description 58
- 229920006335 epoxy glue Polymers 0.000 claims abstract description 23
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 13
- 239000003292 glue Substances 0.000 claims description 6
- 230000035699 permeability Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 4
- 238000005538 encapsulation Methods 0.000 abstract description 3
- 230000006355 external stress Effects 0.000 abstract description 3
- 230000004907 flux Effects 0.000 abstract description 3
- 238000013461 design Methods 0.000 description 4
- 230000009466 transformation Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
Landscapes
- Coils Or Transformers For Communication (AREA)
Abstract
The utility model discloses an isolation driving transformer, which comprises an insulating shell, a plurality of primary pins, a plurality of secondary pins, an annular magnetic core, a primary winding and a secondary winding, wherein the insulating shell is provided with a plurality of first and second windings; the insulating shell is provided with a containing cavity with a downward opening, and epoxy glue is filled in the containing cavity; the annular magnetic core is made of a power ferrite material; through the annular magnetic core that adopts the power ferrite material, cooperation primary winding and secondary winding all twine on annular magnetic core evenly, annular magnetic core, primary winding and secondary winding all adopt epoxy glue encapsulation in the holding chamber simultaneously, reduced the volume of product greatly, required circuit board space is less, improve power density, epoxy glue embedment has higher reliability simultaneously, satisfy the rule test requirement, leakage inductance is also less, and the power ferrite magnetic core characteristic is less influenced by external stress, have higher curie temperature and magnetic flux density, inductance is guaranteed, the whole performance of product is better.
Description
Technical Field
The utility model relates to the technical field of transformers, in particular to an isolation driving transformer.
Background
A Transformer (Transformer) is a device for changing an ac voltage using the principle of electromagnetic induction, and the main components are a primary winding, a secondary winding, and an iron core (magnetic core). The main functions are as follows: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization (magnetic saturation transformers), and the like. The transformer can be divided into: distribution transformers, power transformers, fully sealed transformers, combination transformers, dry transformers, oil immersed transformers, single-phase transformers, electric furnace transformers, rectifier transformers, reactors, anti-interference transformers, lightning protection transformers, box-type transformer test transformers, corner transformers, heavy current transformers, excitation transformers and the like.
The transformer is widely applied to new energy automobiles, with the development of the new energy automobiles, the design tends to be small in volume and high in power density, the requirements on safety regulations are continuously improved, and particularly in a vehicle-mounted DC-DC module, the height of a product is required to be less than 10mm, and the application altitude reaches 5500m. Because of its high operating voltage, the safety distance between the primary stages is required to be more than 2 times greater than that of a normal low-voltage input DC-DC power supply module. Conventional designs have difficulty meeting design requirements or require larger dimensions.
At present, a typical driving transformer is mostly composed of an E-shaped ferrite core and a framework, most of the driving transformer is made of a ferrite core with high magnetic conductivity, the size of the driving transformer is overlarge, the power density of the driving transformer is low, a high-magnetic-conductivity material has a high inductance coefficient, the Curie temperature is generally low due to the material characteristics, the inductance coefficient of the ferrite core can be reduced due to the influence of stress, and product failure can occur in a specific application environment. Therefore, there is a need for improvements in current drive transformers.
Disclosure of Invention
In view of the above, the present utility model aims at overcoming the drawbacks of the prior art, and its primary objective is to provide an isolation driving transformer, which can effectively solve the problems of the existing driving transformer, such as oversized size, low power density and small inductance.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
an isolation driving transformer comprises an insulating shell, a plurality of primary pins, a plurality of secondary pins, a ring-shaped magnetic core, a primary winding and a secondary winding;
the insulating shell is provided with a containing cavity with a downward opening, and epoxy glue is filled in the containing cavity.
The plurality of primary pins are arranged on one side of the bottom of the insulating shell, and the plurality of secondary pins are arranged on the other side of the bottom of the insulating shell;
the annular magnetic core is arranged in the accommodating cavity and is completely covered by epoxy glue, and the annular magnetic core is made of a power ferrite material;
the primary winding is uniformly wound on the annular magnetic core and is completely encapsulated in the accommodating cavity by epoxy glue, and each lead end of the primary winding extends out of the glue surface and is respectively connected with a corresponding primary pin in a conducting way;
the secondary winding is uniformly wound on the annular magnetic core and is completely encapsulated in the accommodating cavity by epoxy glue, and each lead end of the secondary winding extends out of the glue surface and is respectively connected with the corresponding secondary pin in a conducting way.
As a preferable scheme, the annular magnetic core is annular, and is made of a power ferrite material with initial magnetic permeability of 3000 gauss, so that the product can be applied to a higher temperature environment.
As a preferable scheme, the insulating shell is square, the accommodating cavity is square correspondingly, and the annular magnetic core is horizontally arranged at the center of the accommodating cavity, so that the volume of a product is greatly reduced, the required circuit board space is less, and the power density is improved.
As a preferable scheme, the insulating shell is made of plastic.
As a preferred scheme, the plurality of primary pins and the plurality of secondary pins are respectively positioned on two opposite sides of the insulating shell, and the primary pins and the secondary pins are respectively L-shaped and are respectively four.
As a preferred solution, the primary winding and the secondary winding are three layers of insulated wires.
Compared with the prior art, the utility model has obvious advantages and beneficial effects, and in particular, the technical scheme can be as follows:
through the annular magnetic core that adopts the power ferrite material, cooperation primary winding and secondary winding all twine on annular magnetic core evenly, annular magnetic core, primary winding and secondary winding all adopt epoxy glue encapsulation in the holding chamber simultaneously, reduced the volume of product greatly, required circuit board space is less, improve power density, epoxy glue embedment has higher reliability simultaneously, satisfy the rule test requirement, leakage inductance is also less, and the power ferrite magnetic core characteristic is less influenced by external stress, have higher curie temperature and magnetic flux density, inductance is guaranteed, the whole performance of product is better.
In order to more clearly illustrate the structural features and efficacy of the present utility model, the present utility model will be described in detail below with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is an assembled perspective view of a preferred embodiment of the present utility model;
FIG. 2 is an assembled perspective view of another angle of the preferred embodiment of the present utility model;
FIG. 3 is an exploded view of a preferred embodiment of the present utility model;
FIG. 4 is a cross-sectional view of a preferred embodiment of the present utility model.
The attached drawings are used for identifying and describing:
10. insulating housing 11, accommodation chamber
20. Primary pin 30, secondary pin
40. Toroidal core 50, primary winding
60. Secondary winding 70, epoxy glue.
Detailed Description
Referring to fig. 1 to 4, a specific structure of an isolation driving transformer according to a preferred embodiment of the present utility model is shown, which includes an insulating housing 10, a plurality of primary pins 20, a plurality of secondary pins 30, a toroidal core 40, a primary winding 50 and a secondary winding 60.
The insulating housing 10 has a housing cavity 11 with a downward opening, and the housing cavity 11 is filled with epoxy glue 70. In this embodiment, the insulating housing 10 is made of plastic, the insulating housing 10 is square, and the accommodating cavity 11 is square, so that the volume of the product is greatly reduced, the required circuit board space is less, and the power density is improved.
The plurality of primary pins 20 are disposed on one side of the bottom of the insulating housing 10, and the plurality of secondary pins 20 are disposed on the other side of the bottom of the insulating housing 10. In the present embodiment, the plurality of primary pins 20 and the plurality of secondary pins 30 are respectively located on two opposite sides of the insulating housing 10, and the primary pins 20 and the secondary pins 30 are L-shaped and four, but not limited to.
The annular magnetic core 40 is disposed in the accommodating cavity 11 and is completely covered by the epoxy glue 70, and the annular magnetic core 40 is made of a power ferrite material. In this embodiment, the annular magnetic core 40 is horizontally disposed at the center of the accommodating cavity 11, and the annular magnetic core 40 is circular, and the annular magnetic core 40 is made of a power ferrite material with an initial permeability of 3000 gauss, so that the product can be applied in a higher temperature environment.
The primary winding 50 is uniformly wound on the annular magnetic core 40 and is completely encapsulated in the accommodating cavity 11 by epoxy glue 70, and each lead end of the primary winding 50 extends out of the glue surface and is respectively connected with the corresponding primary pin 20 in a conductive manner. In this embodiment, the primary winding 50 is a three-layer insulated wire, and each lead end of the primary winding 50 is connected to the corresponding primary pin 20 in a conductive manner by uniformly winding and welding, so that the connection is more stable and reliable.
The secondary winding 60 is uniformly wound on the annular magnetic core 40 and is completely encapsulated in the accommodating cavity 11 by epoxy glue 70, and each lead end of the secondary winding 60 extends out of the glue surface and is respectively connected with the corresponding secondary pin 30 in a conductive manner. In this embodiment, the secondary winding 60 is a three-layer insulated wire, and each lead end of the secondary winding 60 is respectively connected with the corresponding secondary pin 30 in a conductive manner by uniformly winding and welding, so that the connection is more stable and reliable.
The utility model also discloses a preparation method of the isolation driving transformer, which comprises the following steps:
(1) The plurality of primary pins 20 and the plurality of secondary pins 30 are put into an injection mold to be injection-molded into the insulating housing 10, so that the plurality of primary pins 20 and the plurality of secondary pins 30 are fixed on the insulating housing 10.
(2) The primary winding 50 and the secondary winding 60 are uniformly wound on the annular magnetic core 40 respectively, so that the product has smaller leakage inductance, and the annular magnetic core 40, the primary winding 50 and the secondary winding 60 are placed in the accommodating cavity 11 after the winding is completed.
(3) Each lead end of the primary winding 50 is connected to the corresponding primary pin 20 in a conductive manner, and each lead end of the secondary winding 60 is connected to the corresponding secondary pin 30 in a conductive manner.
(4) The annular magnetic core 40, the primary winding 50 and the secondary winding 60 are suspended in the accommodating cavity 11, and the epoxy glue 70 is injected into the accommodating cavity 11, so that the annular magnetic core 40, the primary winding 50 and the secondary winding 60 are completely covered by the epoxy glue 70, thereby meeting the requirement of safety insulation, and the safety distance can be more than 8.5 mm.
(5) The isolation driving transformer is obtained after the epoxy glue 70 is solidified.
The design focus of the utility model is that: through the annular magnetic core that adopts the power ferrite material, cooperation primary winding and secondary winding all twine on annular magnetic core evenly, annular magnetic core, primary winding and secondary winding all adopt epoxy glue encapsulation in the holding chamber simultaneously, reduced the volume of product greatly, required circuit board space is less, improve power density, epoxy glue embedment has higher reliability simultaneously, satisfy the rule test requirement, leakage inductance is also less, and the power ferrite magnetic core characteristic is less influenced by external stress, have higher curie temperature and magnetic flux density, inductance is guaranteed, the whole performance of product is better.
The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the technical scope of the present utility model, so any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical principles of the present utility model are still within the scope of the technical solutions of the present utility model.
Claims (6)
1. An isolation driving transformer, characterized in that: the device comprises an insulating shell, a plurality of primary pins, a plurality of secondary pins, an annular magnetic core, a primary winding and a secondary winding;
the insulating shell is provided with a containing cavity with a downward opening, and epoxy glue is filled in the containing cavity;
the plurality of primary pins are arranged on one side of the bottom of the insulating shell, and the plurality of secondary pins are arranged on the other side of the bottom of the insulating shell;
the annular magnetic core is arranged in the accommodating cavity and is completely covered by epoxy glue, and the annular magnetic core is made of a power ferrite material;
the primary winding is uniformly wound on the annular magnetic core and is completely encapsulated in the accommodating cavity by epoxy glue, and each lead end of the primary winding extends out of the glue surface and is respectively connected with a corresponding primary pin in a conducting way;
the secondary winding is uniformly wound on the annular magnetic core and is completely encapsulated in the accommodating cavity by epoxy glue, and each lead end of the secondary winding extends out of the glue surface and is respectively connected with the corresponding secondary pin in a conducting way.
2. The isolated drive transformer of claim 1, wherein: the annular magnetic core is annular, and is made of a power ferrite material with initial magnetic permeability of 3000 gauss.
3. The isolated drive transformer of claim 2, wherein: the insulating shell is square, and correspondingly, the accommodating cavity is square, and the annular magnetic core is horizontally arranged at the center of the accommodating cavity.
4. The isolated drive transformer of claim 1, wherein: the insulating shell is made of plastic materials.
5. The isolated drive transformer of claim 1, wherein: the primary pins and the secondary pins are respectively positioned on two opposite sides of the insulating shell, and the primary pins and the secondary pins are L-shaped and are four.
6. The isolated drive transformer of claim 1, wherein: the primary winding and the secondary winding are all three layers of insulated wires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321315405.5U CN220155348U (en) | 2023-05-26 | 2023-05-26 | Isolation driving transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321315405.5U CN220155348U (en) | 2023-05-26 | 2023-05-26 | Isolation driving transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220155348U true CN220155348U (en) | 2023-12-08 |
Family
ID=89008216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321315405.5U Active CN220155348U (en) | 2023-05-26 | 2023-05-26 | Isolation driving transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220155348U (en) |
-
2023
- 2023-05-26 CN CN202321315405.5U patent/CN220155348U/en active Active
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