TWI754494B - Isolation transformer - Google Patents

Abstract

The invention discloses an isolation transformer. The isolation transformer includes: an outer frame, a core and two high-voltage wire. The outer frame has a containing slot. Four electrodes are provided at one end of the core. Each high-voltage wire is wound around the core, and both ends of each high-voltage resistant wire are respectively fixed to one of the electrodes, and the withstand voltage of each high-voltage wire is not less than 3 kV. The core wrapped with two high-voltage wires is fixedly arranged on the outer frame, and the core wrapped with two high-voltage wires is correspondingly located in the containing slot, and the end of the core with four electrodes is exposed to one end of the outer frame.

Description

isolation transformer

The invention relates to a transformer, in particular to an isolation transformer with high-voltage resistant lines.

Please refer to FIG. 1 and FIG. 2 together, which are respectively a three-dimensional schematic diagram and a partial exploded schematic diagram of a conventional isolation transformer. A conventional isolation transformer A includes an outer frame A1 , a core A2 , a first wire A3 and a second wire A4 . One end of the outer frame A1 is provided with a first electrode A5, a second electrode A6, a third electrode A7 and a fourth electrode A8. A part of the first wire A3 is wound around the core body A2, and both ends of the first wire A3 are welded and fixed to the first electrode A5 and the second electrode A6, and a part of the second wire A4 is wound around the core body A2. Both ends are welded and fixed to the third electrode A7 and the fourth electrode A8. One end of the core body A2 has a first card slot A21, a second card slot A22, a third card slot A23 and a fourth card slot A24.

The manufacturing process of the isolation transformer A generally includes the following steps: a first wire winding step: firstly, one end of the first wire A3 is fixed to the first slot A21, then, the first wire A3 is wound around the core A2, and finally , fix the other end of the first wire A3 in the second slot A22; a second wire winding step: first fix one end of the second wire A4 in the third slot A23, and then wrap the second wire A4 around the core body A2, and finally, fix the other end of the second wire A4 to the fourth slot A24; an assembly and welding step: set the core A2 wound with the first wire A3 and the second wire A4 on the outer frame A1, and Solder the two ends of the first wire A3 and the two ends of the second wire A4 to the first electrode A5, The second electrode A6, the third electrode A7, and the fourth electrode A8.

In an application scenario where the first wire A3 and the second wire A4 are ordinary wires (non-high voltage resistant wires with a withstand voltage lower than 3 kV), the isolation transformer A can be produced by using relevant automated production equipment. However, when the first wire A3 and the second wire A4 are replaced with high-voltage wires (withstanding voltage higher than 3 kV), the insulating layer A31 of the first wire A3 and the insulating layer A41 of the second wire A4 will be significantly thicker, while The first wire A3 and the second wire A4 will become elastic due to the thickening of the insulating layers A31 and A41. Therefore, in the process of winding the first wire A3 around the core A2 by the related equipment, the elastic restoring force generated by the bent insulating layer A31 will make the first wire A3 stuck in the first card slot A21. One end bounces off the first card slot A21; when the first wire A3 bounces off the first card slot A21, the first wire A3 originally wound around the core A2 will no longer be wound around the core A2. That is, when the first wire A3 and the second wire A4 are replaced with high-voltage wires (withstanding voltage higher than 3 kV), the relevant automated production equipment will no longer be able to manufacture the isolation transformer A using the above manufacturing process.

The invention discloses an isolation transformer, which is mainly used to improve the problem that the conventional isolation transformer cannot be mass-produced in a traditional way after the wires are replaced with high-voltage resistant wires.

One of the embodiments of the present invention discloses an isolation transformer, which includes: an outer frame, a core and two high-voltage lines. The outer frame has an accommodating slot. One end of the core body is provided with four electrodes. Each high-voltage resistant wire is wound around the core, and the two ends of each high-voltage resistant wire are respectively fixed to one of the electrodes, and the withstand voltage of each high-voltage resistant wire is not less than 3 kilovolts. The core body wound with two high-voltage resistant wires is fixedly arranged in the accommodating groove, and one end of the core body with four electrodes is exposed at one end of the outer frame; each of the high-voltage resistant wires includes a wire core body and an insulating an elastic layer, the insulating elastic layer is wrapped around the conductive core, and each end of the conductive core of each of the high-voltage lines is welded and fixed to one of the electrodes; the The thickness of the insulating elastic layer is not less than 0.025 millimeters (mm).

To sum up, the isolation transformer of the present invention is provided with four The design of electrodes, etc., allows related automation equipment to automatically produce isolation transformers with high-voltage lines.

For further understanding of the features and technical content of the present invention, please refer to the following detailed descriptions and drawings related to the present invention, however, the drawings provided are only for reference and description, not for limiting the present invention.

Known technology:

A: Isolation Transformer

A1: Outer frame

A21: The first card slot

A22: The second card slot

A23: The third card slot

A24: Fourth card slot

A2: Core

A3: First wire

A31: Insulation layer

A4: Second wire

A41: Insulation layer

A5: The first electrode

A6: Second electrode

A7: The third electrode

A8: Fourth electrode

this invention:

100: Isolation Transformer

1: Outer frame

11: accommodating slot

12: Abutting part

13: The first avoidance slot

2: Core

21: Winding Department

22: End

221: Surface

23: Second Avoidance Slot

3: High-voltage line

31: Conductive core

32: Insulation elastic layer

4: Electrodes

41: The third avoidance slot

42: Surface

D: thickness

SP: threading space

FIG. 1 is a three-dimensional schematic diagram of a conventional isolation transformer.

FIG. 2 is an exploded schematic diagram of a conventional isolation transformer.

FIG. 3 and FIG. 4 are three-dimensional schematic views of the isolation transformer of the present invention from different viewing angles.

FIG. 5 is an exploded schematic diagram of the isolation transformer of the present invention.

FIG. 6 is a partial enlarged schematic diagram of the isolation transformer of the present invention.

In the following description, if it is indicated to refer to a specific figure or as shown in a specific figure, it is only used for emphasis in the subsequent description, and most of the related content mentioned appears in the specific figure, However, it is not limited that only the specific drawings may be referred to in this subsequent description.

Please refer to FIG. 3 to FIG. 6 together. FIG. 3 and FIG. 4 are schematic perspective views of the isolation transformer of the present invention. FIG. 5 is an exploded schematic view of the isolation transformer of the present invention. FIG. 6 is a partial view of the isolation transformer of the present invention. Enlarge the schematic. The isolation transformer 100 of the present invention includes an outer frame 1 , a core 2 and two high-voltage lines 3 . The outer frame 1 has an accommodating slot 11 . For example, the accommodating groove 11 may be provided through the outer frame 1 . The accommodating groove 11 is mainly used for accommodating the part of the core 2 wound with the two high-voltage resistant wires 3 , and the shape and size of the accommodating groove 11 are not limited to those shown in the drawings.

The core body 2 may be made of magnetically conductive material, and the core body 2 may include a winding portion 21 and two end portions 22, the two end portions 22 are located at both ends of the winding portion 21, and the winding portion 21 is used to provide two A high-voltage wire 3 is wound. One of the ends 22 of the core 2 is provided with four electrodes 4 . At least one end portion 22 may be used for mutual fixation with the outer frame 1 . About the outer shape of the core body 2, the size of the core body 2, and the size of each electrode 4 The size, the shape of each electrode 4 and the arrangement position of the four electrodes 4 can be changed according to requirements, and the figure shown in the figure is only an exemplary aspect.

Each high-voltage resistant wire 3 is wound around the core body 2 . Each high-voltage resistant wire 3 includes a conductive core 31 and an insulating elastic layer 32 , and the insulating elastic layer 32 wraps the conductive core 31 . Both ends of the conductive core 31 of each high-voltage line 3 are welded and fixed to one of the electrodes 4 respectively, and the withstand voltage of each high-voltage line 3 is not less than 3 kilovolts. The material of the insulating elastic layer 32 may include, for example, polyethylene, polyurethane, rubber, polyimide and other elastic materials. The type of the wire core 2 and its outer diameter can be selected according to requirements, which are not limited here.

The core body 2 wound with two high-voltage resistant wires 3 is fixedly arranged on the outer frame 1, and the part of the core body 2 wound with the two high-voltage resistant wires 3 is correspondingly located in the accommodating groove 11, and the core body 2 is provided with four electrodes 4. One end is the end exposed to the outer frame 1 .

As shown in FIG. 4 and FIG. 5 , the manufacturing process of the isolation transformer 100 of the present invention may include the following steps: a step of fixing a high-voltage line: first, one end of one of the high-voltage lines 3 is welded and fixed to one of the electrodes 4, and then, the The rest of the high-voltage wire 3 is wound around the core 2, and finally, the other end of the high-voltage wire 3 is welded to another electrode 4; then, in the same way, another high-voltage wire 3 is wound around the core 2, and The two ends of the high-voltage resistant wire 3 are welded and fixed to the remaining two electrodes 4 successively; an assembly step: the core 2 and the outer frame 1 wound with the two high-voltage resistant wires 3 are fixed to each other, so as to complete the assembly of the isolation transformer 100 .

According to the above, the isolation transformer 100 of the present invention is designed by arranging four electrodes 4 at one end of the core body 2 . Any high-voltage line 3 is wound around the core body 2 and the core body 2 is assembled to the outer frame 1 . During the process, the high-voltage wire 3 will be tightly wound around the core 2, and the high-voltage wire 3 will not be loosened due to the elastic restoring force generated by the bending of the insulating elastic layer 32 (that is, the high-voltage wire 3 bounces off the core 2 ). ) problem, and the isolation transformer 100 of the present invention can be directly mass-produced automatically by using related automation equipment.

Please refer to FIG. 2 and FIG. 5 together. As mentioned above in the prior art, in the prior art, when the first wire A3 and the second wire A4 of the isolation transformer 100 are replaced with high-voltage wires, the automation equipment cannot be directly used for automation. On the other hand, the isolation transformer 100 of the present invention can be mass-produced directly through automation equipment. Specifically, the thickness of the insulation layer of an ordinary non-high-voltage wire should not exceed 0.015 millimeters (mm). The non-high-voltage wire of this thickness can be easily applied to the conventional method shown in FIG. 2 . Technology, and related automation equipment can easily produce such non-high-voltage wires with conventional manufacturing processes. In contrast, in order to carry high voltage, the thickness of the insulating elastic layer 32 of the high-voltage wire 3 defined in the present invention is mostly greater than 0.015 mm. Such high-voltage wire 3 cannot be produced by conventional related automation equipment.

In one specific embodiment, the diameter of each high-voltage resistant wire 3 may be no greater than 0.5 millimeters (mm), but not limited thereto. The diameter of the high-voltage line 3 can be determined according to the requirements of the relevant personnel for the withstand voltage of the high-voltage line 3 . Generally speaking, the larger the diameter of the high-voltage line 3 is, the greater the withstand voltage is.

As shown in FIG. 6 , in practical applications, in order to ensure that the withstand voltage of each high-voltage line 3 is not less than 3 kV, the conductive core 31 may be sprayed for at least three times, so that the The outer surface is formed with an insulating elastic layer 32 having a thickness D of not less than 0.025 millimeters (mm). In another embodiment, in order to ensure that the withstand voltage of each high-voltage line 3 is not less than 5 kV, the conductive core 31 may be sprayed at least 6 times to form a thickness on the outer surface of the conductive core 31 D is not less than 0.035 millimeters (mm) of the insulating elastic layer 32 . In other words, in the embodiment in which the withstand voltage of the high-voltage line 3 is not less than 3 kilovolts, the thickness D of the insulating elastic layer 32 is not less than 0.025 millimeters (mm), and the withstand voltage of the high-voltage line 3 is not less than 5 kilovolts In the embodiment of Volt, the thickness D of the insulating elastic layer 32 is not less than 0.035 millimeters (mm). Of course, in a specific implementation, the thickness of the insulating elastic layer 32 may also be changed according to the type of the conductive core 31 , and the above-mentioned values are only an example. In addition, the method of forming the insulating elastic layer 32 on the conductive core 31 is not limited to the method of spraying, and it can be formed on the outside of the conductive core 31 in various ways according to requirements. surface.

The shape of the outer frame 1, the shape of the core body 2 and the shape of each electrode 4 of the above-mentioned isolation transformer 100 of the present invention can all be changed according to requirements. For example, one end of the outer frame 1 may have two abutting portions 12 and two first avoidance grooves 13, the two abutting portions 12 are disposed facing each other, and each first avoidance groove 13 is formed by the outer frame One end of the 1 is concavely formed, and the two first escape grooves 13 are arranged facing each other.

The core 2 is provided with the ends 22 of the four electrodes 4 , and may have four second avoidance grooves 23 , and each electrode 4 may have a third avoidance groove 41 . When each electrode 4 is fixed on the end portion 22 of the core body 2 , each of the third escape grooves 41 communicates with one of the second escape grooves 23 . When the core body 2 is provided with one side of the end portions 22 of the four electrodes 4 and is fixedly arranged on the two abutting portions 12, each of the first escape grooves 13, two of the second escape grooves 23 and two of the third escape grooves The avoidance grooves 41 communicate with each other, and each of the first avoidance grooves 13 , the two second avoidance grooves 23 and the two third avoidance grooves 41 will together form a threading space SP, and the threading space SP is used to provide high-voltage resistant wires. 3 through. Through the design of the two first avoidance grooves 13 , the four second avoidance grooves 23 and the four third avoidance grooves 41 , it can be ensured that when the core body 2 is fixed to the outer frame 1 , the two high-voltage resistant wires 3 will not be connected to the outer frame. 1 An interference problem occurs. The dimensions, shapes and installation positions of the first escape groove 13 , the second escape groove 23 and the third escape groove 41 are not limited to those shown in the drawings of this embodiment.

It is worth mentioning that, as shown in FIG. 4 , in one embodiment, each electrode 4 is opposite to a surface 42 of the core 2 , which may be a surface 221 of the end 22 of the core 2 where the electrodes 4 are disposed. Flush, so, in practical applications, the isolation transformer 100 can be fixed on the circuit board by surface mount technology (SMT).

To sum up, the isolation transformer of the present invention is designed with four electrodes arranged at one end of the core body, and can be mass-produced using automated production equipment in conjunction with the manufacturing process described in this embodiment above. In the process, the production equipment can be directly used to wind and fix the high-voltage wire to the core, and basically no human intervention is required in the process. Conversely, accustomed Isolation transformers, if their wires are replaced with high-voltage wires, can no longer be mass-produced with the same manufacturing method and the same automatic production equipment.

The above descriptions are only preferred feasible embodiments of the present invention, which do not limit the scope of the present invention. Therefore, any equivalent technical changes made by using the contents of the description and drawings of the present invention are included in the protection scope of the present invention. .

1: Outer frame

11: accommodating slot

12: Abutting part

13: The first avoidance slot

2: Core

21: Winding Department

22: End

3: High-voltage line

31: Conductive core

32: Insulation elastic layer

4: Electrodes

Claims (8)

An isolation transformer, comprising: an outer frame with an accommodating slot; a core body, one end of which is provided with four electrodes; two high-voltage resistant wires, each of which is wound around the core body, and each The two ends of the high-voltage lines are respectively fixed to one of the electrodes, and the withstand voltage of each of the high-voltage lines is not less than 3 kV; wherein, the core body wound with the two high-voltage lines is fixed on the In the accommodating groove, and one end of the core body provided with the four electrodes is exposed at one end of the outer frame; wherein, each of the high-voltage wires includes a wire core body and an insulating elastic layer, so The insulating elastic layer is wrapped around the conductive core, and each end of the conductive core of each high-voltage wire is welded and fixed to one of the electrodes; wherein, the insulating elasticity of each high-voltage wire is The thickness of the layer is not less than 0.025 millimeters (mm). The isolation transformer according to claim 1, wherein the insulating elastic layer of each of the high-voltage resistant wires is formed on the conductive core by at least three spraying operations. The isolation transformer according to claim 1, wherein the withstand voltage of each of the high-voltage lines is not less than 5 kilovolts. The isolation transformer according to claim 3, wherein the thickness of the insulating elastic layer of each of the high-voltage resistant wires is not less than 0.035 millimeters (mm). The isolation transformer according to claim 4, wherein the insulating elastic layer of each of the high-voltage resistant wires is formed on the conductive core by at least six spraying operations. The isolation transformer according to claim 1, wherein the material of the insulating elastic layer is Materials include polyethylene, polyurethane, rubber, polyimide. The isolation transformer according to claim 1, wherein the diameter of each of the high-voltage resistant wires is not greater than 0.5 millimeters (mm). The isolation transformer according to claim 1, wherein one end of the outer frame has two first avoidance grooves, and one end of the core body provided with the four electrodes has four second avoidance grooves, each of the The first avoidance groove is disposed adjacent to one of the second avoidance grooves, and the first avoidance groove and the second avoidance groove adjacent to each other can jointly form a threading space, and the threading space is used to provide the One of the high-voltage lines is passed through.

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