KR20230139983A - Die for mold transformer and manufacturing method of mold transformer using the same - Google Patents

Abstract

The present invention relates to a mold for a mold transformer that can prevent lead wires from being separated during the injection process of a mold material and a method of manufacturing a mold transformer using the same, including a terminal fixing part coupled to a terminal portion of a mold transformer, and fixing the terminal to one side thereof. A mold transformer comprising an upper mold disposed adjacently and a lower mold coupled to the upper mold with the terminal fixing part interposed therebetween, wherein the bottom surface of the upper mold and the upper surface of the lower mold are depressed into shapes corresponding to each other. Disclosed is a mold for use and a method for manufacturing a mold transformer using the same.

Description

Mold for mold transformer and manufacturing method of mold transformer using the same {Die for mold transformer and manufacturing method of mold transformer using the same}

The present invention relates to a mold for a mold transformer and a method of manufacturing a mold transformer using the same. More specifically, to a mold for a mold transformer that can prevent separation of high-voltage lead wires during the mold injection process and a method of manufacturing a mold transformer using the same. It's about.

A transformer is a device that changes current or voltage using electromagnetic induction. Transformers can be classified into immersion transformers, dry transformers, and mold transformers depending on their insulation method.

Among these, a mold transformer refers to a transformer that insulates the outside of the winding by wrapping it with a solid insulator. The demand for mold transformers is increasing due to the emergence of insulators with excellent heat resistance and flame retardancy, such as epoxy, without using oil, which is highly likely to cause environmental pollution.

In a typical mold transformer, the mold is injected into the mold for the mold transformer with the high-voltage winding part of the mold transformer disposed inside the mold for the mold transformer. Afterwards, when the mold is hardened, the mold for the mold transformer is removed and other components of the mold transformer are removed. It is manufactured by combining.

However, during the mold injection and curing process, the lead wire of the high-voltage winding unit may rotate or move and deviate from its initial position. This may cause deflection of the lead wire within the mold. If the lead wire within the mold is deflected, the insulation performance of the entire mold transformer may deteriorate, resulting in insulation breakdown and burnout.

Therefore, the development of a mold for a mold transformer that can prevent the high-voltage lead wire from being separated during the mold injection process and a method of manufacturing a mold transformer using the same may be considered.

Korean Patent Publication No. 10-0500012 discloses an outdoor columnar mold transformer. Specifically, a mold transformer is disclosed in which epoxy resin is molded into a connection portion between a lead wire coated with an insulating material and a bushing.

However, this type of mold transformer does not disclose a specific molding structure or molding method of epoxy resin.

Korean Patent Publication No. 10-1658349 discloses a mold transformer with reinforced strength and insulation performance. Specifically, a mold transformer in which the thickness of the epoxy resin around the windings is increased is disclosed.

However, this type of mold transformer does not provide a fundamental solution to the problem of deflection of the high-voltage lead wire in the mold. Furthermore, there is a problem in that the manufacturing process and overall volume of the mold transformer are increased, resulting in an increase in materials and costs.

Korean Patent Publication No. 10-0500012 (2005.07.07.) Korean Patent Publication No. 10-1658349 (2016.09.21.)

One object of the present invention is to provide a mold for a mold transformer that can prevent separation of a high-voltage lead wire during the mold injection process and a method of manufacturing a mold transformer using the same.

Another object of the present invention is to provide a mold for a mold transformer that can simplify the manufacturing process and shorten the manufacturing time, and a method of manufacturing a mold transformer using the same.

Another object of the present invention is to provide a mold for a mold transformer and a method of manufacturing a mold transformer using the same, which can further reduce the manufacturing cost of the mold transformer.

In order to achieve the above object, a mold for a mold transformer according to an aspect of the present invention is a mold for a mold transformer used in the manufacture of a mold transformer, comprising: a terminal fixing part coupled to the terminal part of the mold transformer; an upper mold on one side of which the terminal fixing part is disposed adjacently; and a lower mold coupled to the upper mold with the terminal fixing part interposed therebetween, wherein the bottom surface of the upper mold and the upper surface of the lower mold are depressed into shapes corresponding to each other.

Additionally, the terminal fixing part may be coupled to the terminal portion of the mold transformer at its center, and the bottom surface of the upper mold and the upper surface of the lower mold may be spaced apart from the terminal portion of the mold transformer, respectively.

In addition, the terminal fixing part may be provided with a coupling protrusion inserted into and coupled to either the bottom surface of the upper mold or the upper surface of the lower mold.

In addition, at least one of the bottom surface of the upper mold and the upper surface of the lower mold may be formed in a shape corresponding to the coupling protrusion, so that a terminal fixing part coupling hole that engages and engages the coupling protrusion may be formed to be recessed.

In addition, the bottom surface of the upper mold and the upper surface of the lower mold include a winding portion mold recessed into a shape corresponding to the winding portion of the mold transformer; a bushing mold recessed into a shape corresponding to the lead wire of the mold transformer; and a terminal mold located on a side opposite to the winding mold of the bushing mold and recessed into a shape corresponding to the terminal fixing portion, wherein the insides of the winding mold, the bushing mold, and the terminal mold are provided. may communicate with each other to enable mutual material transfer.

Additionally, when the terminal fixing part is inserted into the terminal mold, a predetermined space may be formed between one end opposite to the bushing mold and an end of the terminal mold opposite to the bushing mold.

Additionally, the bottom surface of the upper mold and the upper surface of the lower mold include a mold inlet opening to one side of the upper mold and the lower mold; and a mold outlet that is open to one side of the upper mold and the lower mold and is spaced apart from the mold inlet, wherein the mold inlet and the mold outlet are closed except for the mold inlet and the mold outlet. Each may be in communication with the inside of the winding mold to enable mutual material movement.

Additionally, the bushing mold includes a plurality of bushing large diameter portions extending radially outward with respect to the axial direction; and a bushing small-diameter portion located between two neighboring large-diameter bushing portions and having a cross-sectional area smaller than that of the large-diameter bushing portion in the axial direction, wherein the large-diameter bushing portion and the small-diameter bushing portion alternate along the axial direction. can be arranged sequentially.

In addition, the winding portion of the mold transformer is wound on the outer peripheral surface, and further includes a bobbin mold disposed between the upper mold and the lower mold, and the bottom surface of the upper mold and the upper surface of the lower mold are each formed of a winding of the mold transformer. Wealth and wealth can be separated from each other.

In addition, the present invention is a method of manufacturing a mold transformer using a mold for a mold transformer according to an aspect of the present invention, which includes (a) the winding part, the terminal fixing part, and the shield in any one of the upper mold and the lower mold. A step of inserting a member; (b) combining the upper mold with the lower mold with the terminal fixing part interposed therebetween; (c) injecting mold material between the upper mold and the lower mold; (d) curing the mold to form the mold part; and (e) separating the upper mold, the lower mold, and the terminal fixing portion from the mold portion, respectively.

Additionally, before step (a), step (a0) of coupling the terminal of the winding unit to the terminal fixing unit may be performed.

In addition, step (d) includes: (d1) curing the mold at a preset temperature for a first preset time; and (d2) curing the mold by raising the temperature by a preset amount at each preset time interval for a preset second time period.

Additionally, after step (e), step (f) of drying the mold part at a preset drying temperature for a preset drying time may be performed.

Additionally, after step (f), step (g) of coating the winding portion mold and the shield portion mold with a semiconducting layer may be performed.

Additionally, after step (g), step (h) of coupling the iron core, insulating member, and support portion to the mold portion may be performed.

Among the various effects of the present invention, the effects that can be obtained through the above-described solution are as follows.

First, the mold for the mold transformer includes an upper mold, a lower mold, and a terminal fixing part. The terminal fixing part is located between the upper mold and the lower mold, and is disposed adjacent to the upper mold and the lower mold, respectively. Additionally, the terminal fixture is coupled to the high voltage terminal of the mold transformer.

Therefore, the high-voltage lead wire connected to the high-voltage terminal is fixed between the upper mold and the lower mold during the mold injection process, and arbitrary separation can be prevented. Accordingly, the high-voltage lead wire can be located in the center of the bushing mold. That is, a bushing mold of uniform thickness can be formed around the high-voltage lead wire. As a result, insulation breakdown and subsequent burnout accidents caused by high-voltage lead wires can be prevented. Furthermore, the durability and lifespan of the mold transformer can be further increased.

In addition, assembly and disassembly of the upper mold, lower mold, and terminal fixture are easy, and the mold portion surrounding the high-voltage winding portion can be completed in a single injection process.

Accordingly, the manufacturing process of the mold transformer can be simplified and the manufacturing time can be shortened. Accordingly, the productivity of the mold transformer can be maximized.

Additionally, the terminal fixture is removed after the mold injection and curing process is completed and is not included in the components of the mold transformer.

Accordingly, the structure of the mold transformer can be further simplified. Accordingly, the manufacturing cost of the mold transformer can be further reduced. Furthermore, the weight of the mold transformer can be further reduced.

1 is a perspective view showing a mold transformer manufactured using a mold for a mold transformer according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view showing the mold transformer of FIG. 1.
Figure 3 is an exploded perspective view showing the iron core, winding part, insulating member, shield member, and mold part provided in the mold transformer of Figure 1.
FIG. 4 is a perspective view showing the shield member of FIG. 3.
Figure 5 is a partial cross-sectional view showing the shield member of Figure 4;
Figure 6 is a perspective view showing the mold part of Figure 3.
FIG. 7 is a side view showing the mold part of FIG. 3.
FIG. 8 is a partial cross-sectional view showing the shield member and mold portion of FIG. 3.
Figure 9 is an exploded perspective view showing a mold for a mold transformer according to an embodiment of the present invention.
FIG. 10 is a perspective view showing an upper mold provided in the mold for the mold transformer of FIG. 9.
FIG. 11 is a perspective view showing a lower mold provided in the mold for the mold transformer of FIG. 9.
FIG. 12 is a perspective view showing a bobbin mold provided in the mold for the mold transformer of FIG. 9.
Figure 13 is a perspective view showing a terminal fixing part provided in the mold for the mold transformer of Figure 9.
Figure 14 is a perspective view showing a state in which the high-voltage winding part and shield member of the mold transformer are combined with the bobbin mold of Figure 12.
FIG. 15 is a plan view showing a state in which the high-voltage winding unit, shield member, and bobbin mold of FIG. 14 are combined with the upper mold or the lower mold.
Figure 16 is a perspective view showing the mold part in a state separated from the upper mold, lower mold, bobbin mold, and terminal fixing part.
Figure 17 is a flowchart showing a method of manufacturing a mold transformer according to an embodiment of the present invention.

Hereinafter, the mold 2 for a mold transformer and the manufacturing method of the mold transformer 1 using the same according to an embodiment of the present invention will be described in more detail with reference to the drawings.

In the following description, in order to clarify the characteristics of the present invention, descriptions of some components may be omitted.

In this specification, the same reference numbers are assigned to the same components even in different embodiments, and duplicate descriptions thereof are omitted.

The attached drawings are only intended to facilitate understanding of the embodiments disclosed in this specification, and the technical idea disclosed in this specification is not limited by the attached drawings.

Singular expressions include plural expressions unless the context clearly dictates otherwise.

The terms “upper”, “lower”, “left”, “right”, “anterior side” and “posterior side” used in the following description will be understood with reference to the coordinate system shown in FIGS. 1 and 9.

1. Description of mold transformer (1) manufactured using mold (2) for mold transformer according to an embodiment of the present invention

Prior to the description of the mold 2 for a mold transformer according to an embodiment of the present invention, with reference to FIGS. 1 to 8, a description will be given of the mold transformer 1 manufactured using the mold 2 for a mold transformer according to an embodiment of the present invention. Explain.

The mold transformer 1 uses electromagnetic induction to change the voltage of the input current and output it. At this time, the mold transformer 1 insulates the outside of the high-voltage winding unit 132 by wrapping it with a solid insulator.

In the illustrated embodiment, the mold transformer 1 includes a support portion 11, an iron core 12, a winding portion 13, an insulating member 14, a shield member 15, and a mold portion 16.

Hereinafter, the support portion 11, the iron core 12, the winding portion 13, and the insulating member 14 will be described with reference to FIGS. 1 to 3.

The support portion 11 supports the iron core 12 and the winding portion 13, which will be described later, in the axial direction. In the illustrated embodiment, the support portion 11 supports the iron core 12 and the winding portion 13 in the vertical direction.

The support portion 11 separates the iron core 12 from the installation surface of the mold transformer 1. Through this, direct contact between the iron core 12 and the installation surface can be prevented, and resulting electric leakage accidents can also be prevented.

In one embodiment, the support portion 11 may be formed of a high-strength material. For example, the support portion 11 may be made of aluminum (Al).

In the illustrated embodiment, the support 11 includes an upper frame 111, a lower frame 112, and a support 113.

The upper frame 111 and the lower frame 112 form the upper and lower exterior surfaces of the support portion 11, respectively.

The upper frame 111 and the lower frame 112 are located above and below the iron core 12 and the winding section 13, respectively. At this time, the upper frame 111 and the lower frame 112 overlap the iron core 12 and the winding unit 13 in the vertical direction. In one embodiment, the upper frame 111 and the lower frame 112 may have a vertical cross-sectional area larger than the vertical cross-sectional area of the iron core 12 and the winding unit 13.

The upper frame 111 and the lower frame 112 are spaced apart from each other. In addition, the upper frame 111 and the lower frame 112 are coupled with the iron core 12 and the winding portion 13 interposed therebetween.

The upper frame 111 and the lower frame 112 may be formed in a plate shape extending in a direction intersecting the axial direction of the winding unit 13. In the illustrated embodiment, the upper frame 111 and the lower frame 112 are each formed in a plate shape perpendicular to the vertical direction.

In one embodiment, the upper frame 111 and the lower frame 112 may be formed in shapes corresponding to the upper and lower surfaces of the iron core 12, respectively. In another embodiment, a protrusion to which the iron core 12 can be fixed may be formed on the upper surface of the lower frame 112.

A support 113 is disposed between the upper frame 111 and the lower frame 112.

The support 113 maintains a certain distance between the upper frame 111 and the lower frame 112. For this purpose, the support 113 is coupled to the upper frame 111 and the lower frame 112, respectively. In one embodiment, the support 113 may be fastened to the upper frame 111 and the lower frame 112 by bolting.

The support 113 is arranged to overlap the upper frame 111, the lower frame 112, and the winding unit 13 in the axial direction. That is, the upper frame 111, the support 113, and the lower frame 112 are arranged side by side along the axial direction of the winding unit 13. In the illustrated embodiment, the axial direction is up and down.

In one embodiment, the support 113 may be formed in a pillar shape extending in the axial direction of the winding unit 13. In the illustrated embodiment, the support 113 extends in the vertical direction.

A plurality of supports 113 may be provided. In the illustrated embodiment, four supports 113 are provided.

An iron core 12 and a winding portion 13 are disposed inside the support portion 11.

The iron core 12 is formed of a magnetic material such as iron (Fe) and functions as a magnetic field of the mold transformer 1. Specifically, the iron core 12 functions as a magnetic field for the mutual induction phenomenon that occurs between the low-voltage winding section 131 and the high-voltage winding section 132 wound around its outer peripheral surface.

The iron core 12 is located between the upper frame 111 and the lower frame 112 and is coupled to the bottom surface of the upper frame 111 and the upper surface of the lower frame 112, respectively.

The iron core 12 may be formed as an inner convex structure surrounded by the winding part 13 or an outer convex structure surrounding the winding part 13. In the illustrated embodiment, the iron core 12 is formed in a rectangular ring-shaped iron-type structure and is arranged to be surrounded by the winding portion 13.

The iron core 12 may be formed by assembling a plurality of parts. In one embodiment, the iron core 12 may be formed by overlapping a plurality of steel plates in one direction. In the illustrated embodiment, the iron core 12 is formed by combining a plurality of parts in the vertical direction while penetrating the winding portion 13.

The winding unit 13 generates induced electromotive force according to changes in the magnetic field.

The winding portion 13 is formed of a wire made of electrically conductive material. For example, the wire of the winding unit 13 may be made of copper (Cu) or aluminum (Al).

The winding unit 13 is located between the upper frame 111 and the lower frame 112. Additionally, the winding unit 13 is arranged to overlap the upper frame 111 and the lower frame 112 in its axial direction. At this time, the winding unit 13 is spaced apart from the upper frame 111 and the lower frame 112.

The winding portion 13 is wound around the outer peripheral surface of the iron core 12. That is, the winding unit 13 is arranged to overlap the iron core 12 in the axial direction, and the iron core 12 is penetrated and coupled thereto. Accordingly, the magnetic field generated in the winding unit 13 may be formed along the iron core 12.

In the illustrated embodiment, the winding section 13 is arranged to surround the iron core 12 on a radial outer side of the iron core 12. In an embodiment not shown, the winding unit 13 may be located radially inside the iron core 12 and arranged to be surrounded by the iron core 12.

In addition, the winding unit 13 is electrically connected to the primary and secondary devices that are subject to transformation by the mold transformer (1).

The winding unit 13 includes a low-voltage winding unit 131 and a high-voltage winding unit 132.

The low-voltage winding unit 131 is electrically connected to one of the primary and secondary devices that are subject to transformation of the mold transformer (1).

The low-voltage winding unit 131 is located at the upper and lower ends of the winding unit 13, respectively. Additionally, the low-voltage winding unit 131 is wound around a portion of the iron core 12.

In the illustrated embodiment, the low-voltage winding unit 131 includes a first low-voltage winding 1311 and a second low-voltage winding 1312.

The first low-voltage winding 1311 and the second low-voltage winding 1312 are arranged side by side in the axial direction of the winding unit 13. At this time, the first low-voltage winding 1311 and the second low-voltage winding 1312 are spaced apart from each other.

In the illustrated embodiment, the first low-voltage winding 1311 and the second low-voltage winding 1312 are arranged side by side in the vertical direction. In the above embodiment, the first low-voltage winding 1311 is located above the second low-voltage winding 1312.

The first low-voltage winding 1311 and the second low-voltage winding 1312 may each have a lead wire and a terminal formed at one end.

The high-voltage winding unit 132 is electrically connected to the other one of the primary and secondary devices subject to transformation of the mold transformer 1 that is not connected to the low-voltage winding unit 131.

The high-voltage winding section 132 is located at the center of the winding section 13. In addition, the high-voltage winding unit 132 is wound around the iron core 12, and the low-voltage winding unit 131 is wound on one part of the iron core 12 and another part.

The high-voltage winding unit 132 has a first low-voltage wire and a second low-voltage winding 1312 disposed on the upper and lower sides, respectively, in the axial direction. At this time, the high-voltage winding unit 132 is spaced apart from the first low-voltage winding 1311 and the second low-voltage winding 1312. The high-voltage winding unit 132 and the low-voltage winding unit 131 are physically separated by a mold unit 16, which will be described later. A detailed description of this will be provided later.

In the illustrated embodiment, the high-voltage winding unit 132 includes a first high-voltage winding 1321 and a second high-voltage winding 1322.

The first high-voltage winding 1321 and the second high-voltage winding 1322 are arranged in a direction crossing the axial direction of the winding unit 13. In the illustrated embodiment, the first high-voltage winding 1321 and the second high-voltage winding 1322 are directly connected and arranged side by side in the left and right directions. In this embodiment, the first high-voltage winding 1321 is located to the left of the second high-voltage winding 1322.

A first high-voltage lead wire 1321a and a second high-voltage lead wire 1322a are formed at one end of the first high-voltage winding 1321 and the second high-voltage winding 1322, respectively.

The first high-voltage lead wire 1321a and the second high-voltage lead wire 1322a are arranged to be spaced apart from each other. At this time, the first high-voltage lead wire 1321a and the second high-voltage lead wire 1322a each extend in a direction away from the iron core 12.

A first high-voltage terminal 1321b and a second high-voltage terminal 1322b are coupled to one end of the first high-voltage lead wire 1321a and the second high-voltage lead wire 1322a, respectively.

The first high-voltage terminal 1321b and the second high-voltage terminal 1322b are each connected to a primary or secondary device to be transformed by the mold transformer 1 in a conductive manner.

The low-voltage winding unit 131 and the high-voltage winding unit 132 are physically separated by a mold unit 16, which will be described later. At this time, the low-voltage winding unit 131 may be physically separated from the mold unit 16 by an additional insulating member 14.

The insulating member 14 assists in electrical insulation between the low-voltage winding unit 131 and other components.

The insulating member 14 is coupled to the low-voltage winding portion 131 and is formed to surround at least a portion of the low-voltage winding portion 131.

The insulating member 14 is disposed between the inner peripheral surface of the low-voltage winding unit 131 and the iron core 12. Additionally, the insulating member 14 supports the low-voltage winding portion 131 in its axial direction and radially inside. In the illustrated embodiment, the insulating member 14 supports the low-voltage winding portion 131 in the vertical direction and radially inwardly.

The insulating member 14 is located on the upper or lower side of the mold portion 16, which will be described later. As described above, the insulating member 14 supports the low-voltage winding portion 131 in the vertical direction, and the low-voltage winding portion 131 can be physically separated from the mold portion 16 by the insulating member 14. .

A plurality of insulating members 14 may be provided. At this time, the number of insulating members 14 is formed to correspond to the number of low-voltage winding units 131. In the illustrated embodiment, the insulating member 14 is coupled to the first low-voltage winding 1311 and the second low-voltage winding 1312, respectively.

In one embodiment, the insulating member 14 is formed in a shape corresponding to the winding structure of the low-voltage winding unit 131. In the illustrated embodiment, the insulating member 14 is formed in a bobbin shape surrounding the top, bottom, and inner peripheral surface of the low-voltage winding unit 131.

The high-voltage winding unit 132 provides electrical insulation between other components by the shield member 15 and the mold unit 16, separately from the insulating member 14 coupled to the low-voltage winding unit 131.

Hereinafter, the shield member 15 and the mold portion 16 will be described in more detail with reference to FIGS. 3 to 8 .

The shield member 15 further alleviates the electric field distribution surrounding the mold transformer 1.

A high-voltage winding portion 132 penetrates and extends inside the shield member 15. That is, the shield member 15 is arranged to surround a portion of the high-voltage winding unit 132 and attracts a portion of the electric field generated by the high-voltage winding towards the high-voltage winding unit 132.

Specifically, the shield member 15 is arranged to surround the radial outside of the high-voltage lead wires 1321a and 1322a. That is, some of the high-voltage lead wires 1321a and 1322a are penetrated and coupled to the inside of the shield member 15. In one embodiment, the high-voltage lead wires 1321a and 1322a may be located in a straight line with the central axis of the shield member 15.

The shield member 15 is formed in a pillar shape with a hollow interior. Parts of the high-voltage lead wires 1321a and 1322a are coupled through the hollow.

In one embodiment, the shield member 15 may be formed in a mesh structure. This is to minimize air bubbles by passing through and absorbing the mold portion 16 through the mesh network during the injection process of the mold portion 16, which will be described later.

The shield member 15 is formed of an electrically conductive material. In one embodiment, the shield member 15 may be made of aluminum (Al). Accordingly, the shield member 15 can attract a portion of the electric field generated by the high-voltage winding unit 132 back toward the high-voltage winding unit 132.

In the illustrated embodiment, the shield member 15 includes a small diameter portion 151, a large diameter portion 152, and a ground portion 153.

The small diameter portion 151 forms the exterior of the shield member 15.

The small diameter portion 151 is formed in a cylindrical shape extending in one direction. The one direction is the same as the extension direction of the high voltage lead wires 1321a and 1322a. In the illustrated embodiment, the small diameter portion 151 extends in the front-to-back direction.

The small diameter portion 151 is provided with a hollow interior. Parts of the high-voltage lead wires 1321a and 1322a are penetrated into the hollow.

Large-diameter portions 152 are formed at both ends of the small-diameter portion 151, respectively.

The large diameter portion 152 is formed extending from both ends of the small diameter portion 151. In the illustrated embodiment, the large diameter portion 152 is formed at the front and rear ends of the small diameter portion 151.

The large diameter portion 152 is curved and extends toward the outer peripheral surface of the small diameter portion 151. In one embodiment, the end of the large diameter portion 152 may contact the side of the small diameter portion 151.

In summary, the large diameter portion 152 is curved and extends from both ends of the small diameter portion 151 toward the outer peripheral surface of the small diameter portion 151. Accordingly, the large-diameter portion 152 has an axial cross-sectional area larger than that of the small-diameter portion 151. In one embodiment, the large diameter portion 152 may have a maximum radius that is 3 mm larger than the radius of the small diameter portion 151.

A plurality of large-diameter portions 152 may be provided at both ends of the small-diameter portion 151 . In one embodiment, the plurality of large diameter portions 152 may be formed in shapes that correspond to each other. In another embodiment, the plurality of large diameter portions 152 may be formed in different shapes. In the illustrated embodiment, the large diameter portion 152 on the front side is formed so that its end does not contact the side of the small diameter portion 151, and the large diameter portion 152 on the rear side has its end adjacent to the small diameter portion 151. It is formed to contact the side.

A ground portion 153 is formed on the outer peripheral surface of the small diameter portion 151.

The ground portion 153 alleviates the external electric field of the shield member 15.

The ground portion 153 may be electrically connected to the ground by a ground wire.

The ground portion 153 is formed to protrude radially outward from the outer peripheral surface of the small diameter portion 151. Additionally, the ground portion 153 is exposed to the outside of the mold portion 16, which will be described later.

The exterior of the shield member 15 and the high-voltage winding portion 132 is surrounded by the mold portion 16.

Below, the mold portion 16 will be described with reference to FIGS. 6 to 8 .

The mold portion 16 surrounds the outside of the high-voltage winding portion 132 and insulates the surroundings of the high-voltage winding portion 132.

The mold portion 16 is made of an electrically insulating material. In one embodiment, the mold portion 16 may be formed of an epoxy material with excellent electrical insulation performance.

The mold portion 16 is located between the upper frame 111 and the lower frame 112. Additionally, the mold portion 16 is located between the first low-voltage winding 1311 and the second low-voltage winding 1312. In the illustrated embodiment, the mold part 16 is arranged to overlap the upper frame 111, the lower frame 112, the first low-voltage winding 1311, and the second low-voltage winding 1312 in the vertical direction.

The mold part 16 is arranged to surround the high-voltage winding part 132 and the shield member 15, and covers the high-voltage winding part 132 and the shield member 15. Accordingly, the mold part 16 can be formed integrally with the high-voltage winding part 132 and the shield member 15.

The mold part 16 is arranged to surround the periphery of the high-voltage winding part 132, and a high-voltage electric field may be generated on its surface. The high-voltage electric field can be alleviated by the shield member 15.

A shield member 15 is positioned between the outer peripheral surface of the mold portion 16 and the high-voltage lead wires 1321a and 1322a. Accordingly, the electric field generated by the high-voltage lead wires 1321a and 1322a may be concentrated inside the mold portion 16 by the shield member 15. Accordingly, the electric field distribution surrounding the mold transformer 1 can be more relaxed. As a result, the insulation performance of the mold portion 16 can be further improved by the shield member 15.

Additionally, as insulation performance improves, leakage current can be further reduced. That is, the loss of current passing through the mold transformer 1 can be further reduced. Accordingly, the voltage transformation reliability of the mold transformer 1 can be further improved. Furthermore, the reliability of power devices including the molded transformer 1 can also be improved.

The mold portion 16 may be formed in a shape corresponding to the high-voltage winding portion 132 and the shield member 15.

In the illustrated embodiment, the mold portion 16 includes a winding portion mold 161, a shield portion mold 162, and a bushing mold 163.

The winding portion mold 161 electrically insulates a portion of the high-voltage winding portion 132 excluding the high-voltage lead wires 1321a and 1322a.

The winding mold 161 is disposed between the upper frame 111 and the lower frame 112. At the same time, the winding mold 161 is disposed between the first low-voltage winding 1311 and the second voltage winding. In the illustrated embodiment, the upper frame 111, the first low-voltage winding 1311, the winding mold 161, the second low-voltage winding 1312, and the lower frame 112 are sequentially arranged along the vertical direction.

The winding portion mold 161 is arranged to cover and surround the high-voltage winding portion 132 except for the high-voltage lead wires 1321a and 1322a. As described above, the low-voltage winding unit 131 is located above and below the high-voltage winding unit 132, respectively. Through this, it will be understood that the mold part 16 is located between the low-voltage winding part 131 and the high-voltage winding part 132.

Electrical conduction between the high-voltage winding section 132 and the low-voltage winding section 131 is insulated by the winding section mold 161, which is a solid insulating material rather than a fluid, so the distance between the high-voltage winding section 132 and the low-voltage winding section 131 can be minimized.

The winding unit mold 161 is formed in a shape corresponding to the winding structure of the high-voltage winding unit 132. Accordingly, a through hole is formed in the winding unit 13 along the axial direction of the high-voltage winding unit 132. An iron core 12 is inserted and coupled to the through hole.

A semiconducting layer is coated on the surface of the winding mold 161. This is to alleviate the bias of the electric field on the surface of the mold part 16. In one embodiment, the semiconducting layer may be formed of a polymer resin material mixed with carbon black. In another embodiment, the semiconducting layer may be formed of a polymer resin material mixed with acetylene black or furnace black.

The shield mold 162 is located on one side of the winding mold 161.

The shield mold 162 insulates a portion of the high-voltage lead wires 1321a and 1322a located inside the shield member 15.

The shield mold 162 is disposed between the upper frame 111 and the lower frame 112. At this time, a portion of the shield mold 162 may overlap the support portion 11 and the winding portion 13 in the axial direction.

The shield mold 162 is coupled to one side of the winding mold 161. In the illustrated embodiment, the shield mold 162 is coupled to the rear side of the winding mold 161.

The shield mold 162 is arranged to cover and surround the shield member 15 and a portion of the high-voltage lead wires 1321a and 1322a located inside the shield member 15. In summary, the shield member 15 and the shield mold 162 are sequentially arranged radially outward around the high-voltage lead wires 1321a and 1322a.

Accordingly, the shield member 15 may be arranged so that its exterior is surrounded by the shield mold 162. For this purpose, the shield member 15 is disposed inside the manufacturing mold of the mold transformer 1 before mold injection. That is, in order to add the shield member 15 to the existing mold transformer 1, only a simple process is required in which the high-voltage lead wires 1321a and 1322a are penetrated and coupled to the shield member 15 before mold injection.

Accordingly, the shield member 15 can be added without excessive change to the existing structure of the mold transformer 1. Accordingly, the mold transformer 1 is provided with the shield member 15 and can be manufactured in a simple and easy manner.

The shield mold 162 is formed in a shape corresponding to the outer peripheral surface of the shield member 15. It will be understood that the shield member 15 is formed to have a height smaller than the height of the winding part 13, and thus the shield part mold 162 is also formed to have a height smaller than the winding part mold 161.

The shield mold 162 extends along the axial direction of the shield member 15. In one embodiment, the shield mold 162 may extend with an increased axial cross-sectional area toward the boundary with the winding mold 161 or the boundary with the bushing mold 163, which will be described later. This is to alleviate the electric field concentrated at the edge formed at the boundary.

At this time, the axial length of the shield mold 162 is formed to be smaller than the axial length of the shield member 15. In other words, the distance between the iron core 12 and one end of the shield mold 162 opposite to the iron core 12 is smaller than the distance between the iron core 12 and one end opposite to the iron core 12 of the shield member 15. is formed

In the illustrated embodiment, the rear end of the shield mold 162 is located ahead of the rear end of the shield member 15. At this time, the distance d between the rear end of the shield mold 162 and the large diameter part 152 located at the rear end of the shield member 15 may be adjusted according to conditions such as the capacity of the mold transformer 1.

A semiconducting layer is coated on the surface of the shield mold 162. In one embodiment, the surface of the shield mold 162 may be coated with a semiconducting layer made of the same material as the semiconducting layer coated on the surface of the winding mold 161.

A bushing mold 163 is located on one side of the shield mold 162.

The bushing mold 163 insulates other parts of the high-voltage lead wires 1321a and 1322a located outside the shield member 15.

The bushing mold 163 is coupled to the winding mold 161 with the shield mold 162 interposed therebetween. In the illustrated embodiment, the winding mold 161, the shield mold 162, and the bushing mold 163 are arranged side by side in the front-to-back direction.

The bushing mold 163 is arranged to cover and surround another part of the high-voltage lead wires 1321a and 1322a located outside the shield member 15. As described above, the high-voltage lead wires 1321a and 1322a extend in a direction away from the iron core 12. Accordingly, it will be understood that the bushing mold 163 also extends in a direction away from the iron core 12.

One end of the bushing mold 163 facing the iron core 12 contacts one end of the shield mold 162 opposite to the iron core 12. Accordingly, the distance between the iron core 12 and one end of the bushing mold 163 facing the iron core 12 is also smaller than the distance between the iron core 12 and one end opposite to the iron core 12 of the shield member 15. In summary, the large diameter portion 152 located at one end opposite to the iron core 12 of the shield member 15 is located inside the bushing mold 163.

Additionally, the height of the bushing mold 163 is formed to be greater than the height of the shield mold 162. This is to exclude protrusion of the shield portion mold 162 coated with the semiconducting layer. Accordingly, the electric field at the triple point where the shield mold 162, the bushing mold 163, and the air meet can be alleviated.

There is a possibility that an electric field concentration phenomenon still exists at the boundary between the bushing mold 163 and the shield mold 162 coated with a semiconducting layer. However, as described above, part of the surface electric field of the mold part 16 is concentrated inside the mold part 16 by the shield member 15, and occurs at the boundary between the bushing mold 163 and the shield mold 162. The electric field can be alleviated.

In the illustrated embodiment, bushing mold 163 includes protrusions 1631 and recesses 1632.

The protrusion 1631 is formed to extend radially outward from the high-voltage lead wires 1321a and 1322a. A plurality of protrusions 1631 may be provided. A concave portion 1632 is formed between two neighboring protrusions 1631. The concave portion 1632 is formed by being recessed radially inward of the high-voltage lead wires 1321a and 1322a. In summary, the protrusions 1631 and recesses 1632 are alternately arranged along the axial direction of the bushing mold 163.

As the bushing mold 163 includes a plurality of protrusions 1631 and recesses 1632, the contact area between the bushing mold 163 and the air can be further increased. Accordingly, the insulation distance of the bushing mold 163 can be further increased. As a result, the insulation performance of the mold transformer 1 can be further improved.

However, the structure of the mold part 16 is not limited to the shape shown, and may be formed in various embodiments. For example, the mold portion 16 may be integrally formed of an epoxy material.

2. Description of mold 2 for mold transformer according to an embodiment of the present invention

Hereinafter, the mold 2 for a mold transformer according to an embodiment of the present invention will be described with reference to FIGS. 9 to 13.

The mold transformer 1 uses electromagnetic induction to change the voltage of the input current and output it. At this time, the mold transformer 1 insulates the outside of the high-voltage winding part 132 by wrapping it with the mold part 16, which is a solid insulating material.

A mold 2 for a mold transformer may be used in the manufacturing process of the mold transformer 1.

The mold 2 for a mold transformer has an empty interior in the shape of the mold portion 16 of the mold transformer 1, and the mold portion 16 can be formed by injecting molten mold material into the mold.

In one embodiment, the mold may be formed of an epoxy material. However, the material of the mold is not limited to epoxy, and can be made of various materials with excellent electrical insulation performance.

The mold 2 for a mold transformer is formed by assembling a plurality of parts. At this time, the high-voltage winding part 132 and the shield member 15 of the mold transformer 1 may be inserted into the mold 2 for the mold transformer. In addition, the plurality of parts of the mold 2 for a mold transformer are coupled to be sealed except for one portion that forms an injection or discharge path of the mold material.

In the illustrated embodiment, the mold 2 for a mold transformer includes an upper mold 21, a lower mold 22, a bobbin mold 23, and a terminal fixing portion 24.

A depression corresponding to the mold portion 16 of the mold transformer 1 is formed on the bottom of the upper mold 21 and the upper surface of the lower mold 22.

The mold transformer 1 and the terminal fixing part 24 are inserted between the upper mold 21 and the lower mold 22. That is, the mold transformer 1 and the terminal fixing part 24 overlap the upper mold 21 and the lower mold 22 in the vertical direction. At this time, the terminal fixing part 24 is coupled to the terminal of the mold transformer (1).

The upper mold 21, the lower mold 22, and the terminal fixing part 24 are coupled to each other before injection of mold material for forming the mold part 16 of the mold transformer 1, and after the injection and curing process is completed. It can be separated and removed from the mold transformer (1).

Hereinafter, the upper mold 21 and the lower mold 22 will be described in more detail with reference to FIGS. 10 and 11.

The upper mold 21 forms the upper exterior of the mold portion 16 of the mold transformer 1.

The upper mold 21 is arranged to cover and surround the upper side of the mold portion 16.

A depression corresponding to the upper surface of the mold portion 16 of the mold transformer 1 is formed on the bottom of the upper mold 21. The high-voltage winding section 132 and the upper side of the shield member 15 are inserted into the depression.

In the illustrated embodiment, the upper mold 21 includes an upper mold inlet 211, an upper mold outlet 212, an upper winding mold 213, an upper shield mold 214, an upper bushing mold 215, and an upper mold. It can be divided into terminal molds 216.

The upper mold inlet 211 and the upper mold outlet 212 form an inflow and discharge path for mold material injected into the upper mold 21, respectively.

An upper mold inlet 211 and an upper mold outlet 212 are formed on the bottom of the upper mold 21. At this time, the upper mold inlet 211 and the upper mold outlet 212 are spaced apart from each other.

Additionally, the upper mold inlet 211 and the upper mold outlet 212 are open to one side of the upper mold 21. In the illustrated embodiment, the upper mold inlet 211 and upper mold outlet 212 open towards the front side.

The upper mold inlet 211 and the upper mold outlet 212 are each connected to the upper winding mold 213.

The upper winding mold 213 forms the upper exterior of the winding mold 161 surrounding the high-voltage winding portion 132 of the mold transformer 1.

The upper winding mold 213 is recessed in the bottom of the upper mold 21. The upper winding portion mold 213 is formed in a shape corresponding to the upper surface of the high-voltage winding portion 132. However, it is preferable that the recessed volume of the upper winding part mold 213 is formed to be larger than the total volume of the high pressure winding part 132 divided by half.

In the illustrated embodiment, a pillar penetrating the winding part of the high-voltage winding part 132 is formed to protrude from a portion of the upper winding part mold 213. The pillar forms a through hole in the winding mold 161, thereby providing a space for inserting the iron core 12. For this purpose, the pillar is preferably formed in a shape corresponding to the iron core 12.

The upper winding mold 213 is formed so that its interior communicates with the upper mold inlet 211 and the upper mold outlet 212 to enable mutual material transfer. In the illustrated embodiment, the upper winding mold 213 is connected to the rear sides of the upper mold inlet 211 and the upper mold outlet 212, respectively.

The upper shield mold 214 is connected to one side opposite to the upper mold inlet 211 and the upper mold outlet 212 of the upper winding mold 213.

The upper shield mold 214 forms the upper exterior of the shield mold 162 surrounding a portion of the high-voltage lead wires 1321a and 1322a of the mold transformer 1.

The upper shield mold 214 is recessed in the bottom of the upper mold 21. The upper shield mold 214 is formed in a shape corresponding to the upper surface of the shield mold 162.

In one embodiment, a shield member 15 formed of an electrically conductive material to alleviate a surface electric field may be inserted between the upper shield mold 214 and the high-voltage lead wires 1321a and 1322a. In the above embodiment, the upper shield mold 214 is formed in a shape corresponding to the upper surface of the shield member 15. However, it is preferable that the upper shield mold 214 has a recessed volume larger than the total volume of the shield member 15 divided by half.

The interior of the upper shield mold 214 is in communication with the interior of the upper winding mold 213 to enable mutual material transfer. In the illustrated embodiment, the upper shield mold 214 is connected to the rear side of the upper winding mold 213.

The upper shield mold 214 may have an upper ground mold 2141 formed in one portion.

The upper ground portion mold 2141 provides a passage through which the ground portion 153 of the shield member 15 is exposed to the outside of the mold portion 16. To this end, the upper ground portion mold 2141 is formed in a shape corresponding to the ground portion 153 of the shield member 15. In one embodiment, the upper ground mold 2141 may be formed to protrude from a portion of the upper shield mold 214.

An upper bushing mold 215 is connected to one side of the upper shield mold 214 opposite to the upper winding mold 213.

The upper bushing mold 215 forms the upper exterior of the bushing mold 163 surrounding another part of the high-voltage lead wires 1321a and 1322a of the mold transformer 1.

The upper bushing mold 215 is recessed in the bottom of the upper mold 21. The upper bushing mold 215 is formed in a shape corresponding to the upper surface of the bushing mold 163.

In one embodiment, the upper bushing mold 215 may be recessed into a shape corresponding to the high-voltage lead wires 1321a and 1322a of the mold transformer 1.

The interior of the upper bushing mold 215 is in communication with the interior of the upper shield mold 214 to enable mutual material transfer. In the illustrated embodiment, the upper bushing mold 215 is connected to the rear side of the upper shield mold 214.

In the illustrated embodiment, the upper bushing mold 215 may be divided into an upper bushing large diameter part 2151 and an upper bushing small diameter part 2152.

The upper bushing large diameter portion 2151 is formed to extend radially outward with respect to the axial direction of the upper bushing mold 215. A plurality of upper bushing large diameter parts 2151 may be provided.

An upper bushing small diameter portion 2152 is formed between two adjacent upper bushing large diameter portions 2151. The upper bushing small diameter portion 2152 is formed by being recessed radially inward of the upper bushing mold 215. Accordingly, the upper bushing small diameter portion 2152 has a cross-sectional area smaller than that of the upper bushing large diameter portion 2151 in the axial direction.

In summary, the upper bushing large diameter portion 2151 and the upper bushing small diameter portion 2152 are alternately arranged along the axial direction of the upper bushing mold 215. Accordingly, a plurality of protrusions 1631 and concave portions 1632 are formed on the surface of the bushing mold 163, and the contact area between the bushing mold 163 and the air can be increased. Accordingly, the insulation distance of the bushing mold 163 can be further increased.

The upper terminal mold 216 is connected to one side of the upper bushing mold 215 opposite to the upper shield mold 214.

The upper terminal mold 216 provides a space in which the upper side of the terminal fixing portion 24 is accommodated.

The upper terminal mold 216 is recessed in the bottom of the upper mold 21. The upper terminal mold 216 is formed in a shape corresponding to the upper surface of the terminal fixing portion 24.

The interior of the upper terminal mold 216 is in communication with the interior of the upper bushing mold 215 to enable mutual material transfer. In the illustrated embodiment, the upper terminal mold 216 is connected to the rear side of the upper bushing mold 215.

The bottom surface of the upper mold 21 is coupled to the upper surface of the lower mold 22.

The lower mold 22 forms the lower exterior of the mold portion 16 of the mold transformer 1.

The lower mold 22 overlaps and is combined with the upper mold 21 in the vertical direction.

In the illustrated embodiment, the lower mold 22 largely corresponds to the upper mold 21 in structure and function. However, the lower mold 22 is different from the upper mold 21 in that the terminal fixing portion 24 and the coupling hole 2261 are provided.

The lower mold 22 is arranged to cover and surround the lower side of the mold portion 16.

A depression corresponding to the bottom of the mold portion 16 of the mold transformer 1 is formed on the upper surface of the lower mold 22. The high-voltage winding section 132 and the lower side of the shield member 15 are inserted into the depression.

The lower mold 22 may be coupled to the upper mold 21 with the terminal fixing part 24 interposed therebetween. At this time, the high-voltage winding part 132 and the shield member 15 are inserted between the upper mold 21 and the lower mold 22.

When the high-voltage winding part 132 and the shield member 15 are inserted between the upper mold 21 and the lower mold 22, mold material is injected between the upper mold 21 and the lower mold 22. After the injected mold material is hardened and the mold portion 16 is formed, the upper mold 21 and the lower mold 22 are separated from the mold portion 16.

In the illustrated embodiment, the lower mold 22 includes a lower mold inlet 221, a lower mold outlet 222, a lower winding mold 223, a lower shield mold 224, a lower bushing mold 225, and a lower mold. It can be divided into terminal molds 226.

The lower mold inlet 221 and the lower mold outlet 222 form an inflow and discharge path for molded material injected into the lower mold 22, respectively.

A lower mold inlet 221 and a lower mold outlet 222 are formed on the upper surface of the lower mold 22. At this time, the lower mold inlet 221 and the lower mold outlet 222 are spaced apart from each other.

Additionally, the lower mold inlet 221 and the lower mold outlet 222 are open to one side of the lower mold 22. In the illustrated embodiment, the lower mold inlet 221 and the lower mold outlet 222 open towards the front side.

The lower mold inlet 221 overlaps and is combined with the upper mold inlet 211 in the vertical direction to form an inflow path for molded material. Additionally, the lower mold discharge port 222 overlaps and is combined with the upper mold discharge port 212 in the vertical direction to form a discharge path for the mold product.

At this time, the bottom of the upper mold 21 and the upper surface of the lower mold 22 are the remaining portions excluding the upper mold inlet 211, the upper mold outlet 212, the lower mold inlet 221, and the lower mold outlet 222. It is sealed.

In the illustrated embodiment, the lower mold inlet 221 and the lower mold outlet 222 are symmetrical in the vertical direction with the upper mold inlet 211 and the upper mold outlet 212, respectively.

The lower mold inlet 221 and the lower mold outlet 222 are each connected to the lower winding mold 223.

The lower winding mold 223 forms the lower exterior of the winding mold 161 surrounding the high-voltage winding portion 132 of the mold transformer 1.

The lower winding mold 223 is recessed in the upper surface of the lower mold 22. The lower winding portion mold 223 is formed in a shape corresponding to the bottom of the high-voltage winding portion 132. However, it is preferable that the lower winding part mold 223 has a recessed volume larger than the total volume of the high-voltage winding part 132 divided by half.

In the illustrated embodiment, a pillar penetrating the winding part of the high-voltage winding part 132 is formed to protrude from a portion of the lower winding part mold 223. The pillar forms a through hole in the winding mold 161, thereby providing a space for inserting the iron core 12. For this purpose, the pillar is preferably formed in a shape corresponding to the iron core 12.

The lower winding mold 223 overlaps and is combined with the upper winding mold 213 in the vertical direction to form the appearance of the winding mold 161. In the illustrated embodiment, the lower winding mold 223 is symmetrical to the upper winding mold 213 in the vertical direction.

The lower winding mold 223 is formed so that its interior communicates with the lower mold inlet 221 and the lower mold outlet 222 to enable mutual material transfer. In the illustrated embodiment, the lower winding mold 223 is connected to each rear side of the lower mold inlet 221 and the lower mold outlet 222.

The lower shield mold 224 is connected to one side opposite to the lower mold inlet 221 and the lower mold outlet 222 of the lower winding mold 223.

The lower shield mold 224 forms the lower exterior of the shield mold 162 surrounding a portion of the high-voltage lead wires 1321a and 1322a of the mold transformer 1.

The lower shield mold 224 is recessed in the upper surface of the lower mold 22. The lower shield mold 224 is formed in a shape corresponding to the bottom of the shield mold 162.

In one embodiment, a shield member 15 formed of an electrically conductive material to alleviate the surface electric field may be inserted between the lower shield mold 224 and the high-voltage lead wires 1321a and 1322a. In the above embodiment, the lower shield mold 224 is formed in a shape corresponding to the bottom surface of the shield member 15. However, it is preferable that the lower shield mold 224 has a recessed volume larger than the total volume of the shield member 15 divided by half.

The interior of the lower shield mold 224 is in communication with the interior of the lower winding mold 223 to enable mutual material transfer. In the illustrated embodiment, the lower shield mold 224 is connected to the rear side of the lower winding mold 223.

The lower shield mold 224 overlaps and is combined with the upper shield mold 214 in the vertical direction to form the appearance of the shield mold 162. In the illustrated embodiment, the lower shield mold 224 is symmetrical to the upper shield mold 214 in the vertical direction.

The lower shield mold 224 may have a lower ground mold 2241 formed in one portion.

The lower ground portion mold 2241 provides a passage through which the ground portion 153 of the shield member 15 is exposed to the outside of the mold portion 16. To this end, the lower ground portion mold 2241 is formed in a shape corresponding to the ground portion 153 of the shield member 15. In one embodiment, the lower ground mold 2241 may be formed to protrude from a portion of the lower shield mold 224.

A lower bushing mold 225 is connected to one side of the lower shield mold 224 opposite to the lower winding mold 223.

The lower bushing mold 225 forms the lower exterior of the bushing mold 163 surrounding another part of the high-voltage lead wires 1321a and 1322a of the mold transformer 1.

The lower bushing mold 225 is recessed in the upper surface of the lower mold 22. The lower bushing mold 225 is formed in a shape corresponding to the bottom of the bushing mold 163.

In one embodiment, the lower bushing mold 225 may be recessed into a shape corresponding to the high-voltage lead wires 1321a and 1322a of the mold transformer 1.

The lower bushing mold 225 overlaps and is combined with the upper bushing mold 215 in the vertical direction to form the appearance of the bushing mold 163. In the illustrated embodiment, the lower bushing mold 225 is symmetrical to the upper bushing mold 215 in the vertical direction.

The interior of the lower bushing mold 225 is in communication with the interior of the lower shield mold 224 to enable mutual material transfer. In the illustrated embodiment, the lower bushing mold 225 is connected to the rear side of the lower shield mold 224.

In the illustrated embodiment, the lower bushing mold 225 may be divided into a lower bushing large diameter part 2251 and a lower bushing small diameter part 2252.

The lower bushing large diameter portion 2251 is formed to extend radially outward with respect to the axial direction of the lower bushing mold 225. A plurality of lower bushing large diameter parts 2251 may be provided.

A lower bushing small diameter portion 2252 is formed between two adjacent lower bushing large diameter portions 2251. The lower bushing small diameter portion 2252 is formed by being recessed radially inward of the lower bushing mold 225. Accordingly, the lower bushing small diameter portion 2252 has a cross-sectional area smaller than that of the lower bushing large diameter portion 2251 in the axial direction.

In summary, the lower bushing large diameter portion 2251 and the lower bushing small diameter portion 2252 are alternately arranged along the axial direction of the lower bushing mold 225. The resulting effect is the same as the effect resulting from the alternating arrangement of the upper bushing large diameter portion 2151 and the upper bushing small diameter portion 2152.

The lower terminal mold 226 is connected to one side of the lower bushing mold 225 opposite to the lower shield mold 224.

The lower terminal mold 226 provides a space in which the lower side of the terminal fixing portion 24 is accommodated.

The lower terminal mold 226 is recessed in the upper surface of the lower mold 22. The lower terminal mold 226 is formed in a shape corresponding to the bottom surface of the terminal fixing portion 24.

The lower terminal mold 226 overlaps and is combined with the upper terminal mold 216 in the vertical direction to form an accommodating space for the terminal fixing portion 24. In one embodiment, the lower terminal mold 226 is symmetrical to the upper terminal mold 216 in the vertical direction.

The interior of the lower terminal mold 226 is in communication with the interior of the lower bushing mold 225 to enable mutual material transfer. In the illustrated embodiment, the lower terminal mold 226 is connected to the rear side of the lower bushing mold 225.

In the illustrated embodiment, a terminal fixing part 24 coupling hole 2261 is formed in a portion of the lower terminal mold 226.

The coupling hole 2261 of the terminal fixing part 24 may be coupled to the terminal fixing part 24 by inserting the engaging protrusion 242 of the terminal fixing part 24, which will be described later.

In the illustrated embodiment, the terminal fixing part 24 coupling hole 2261 is recessed in the upper surface of the lower mold 22. Specifically, a depression is formed on the upper surface of the lower terminal mold 226.

However, the terminal fixing part 24 coupling hole 2261 is not limited to the illustrated embodiment and may be provided on at least one of the bottom surface of the upper mold 21 and the upper surface of the lower mold 22. In one embodiment, the terminal fixing part 24 coupling hole 2261 may be provided on the bottom of the upper mold 21 and the upper surface of the lower mold 22, respectively.

In addition to the high-voltage winding unit 132, a bobbin mold 23 supporting the high-voltage winding unit 132 may be inserted between the upper mold 21 and the lower mold 22.

Below, the bobbin mold 23 will be described with reference to FIG. 12.

The bobbin mold 23 supports the high-voltage winding portion 132 radially on the inside to prevent the high-voltage winding portion 132 from arbitrarily moving between the upper mold 21 and the lower mold 22.

The bobbin mold 23 has a high-voltage winding unit 132 wound around its outer peripheral surface. Thereafter, when the high-voltage winding portion 132 is inserted between the upper mold 21 and the lower mold 22, it is inserted together with the high-voltage winding portion 132. Accordingly, the high-voltage winding unit 132 can maintain its winding structure between the upper mold 21 and the lower mold 22.

Additionally, since the bobbin mold 23 is located radially inside the high-voltage winding unit 132, the radial inside of the high-voltage winding unit 132 may be spaced apart from the surface of the winding unit mold 161 at a certain distance.

A plurality of bobbin molds 23 may be provided. At this time, the number of bobbin molds 23 is formed to be the same as the number of high-voltage windings provided in the high-voltage winding unit 132.

The bobbin mold 23 is formed to extend along the axial direction of the high-voltage winding unit 132. In the illustrated embodiment, the bobbin mold 23 includes a head portion 231 and a pillar portion 232.

The head portion 231 is located on the upper and lower sides of the bobbin mold 23, respectively, to form the upper and lower portions of the bobbin mold 23.

The head portion 231 supports the high-voltage winding portion 132 coupled to the bobbin mold 23 from the upper and lower sides and prevents the high-voltage winding portion 132 from being separated in the vertical direction. Accordingly, the upper and lower ends of the high-voltage winding unit 132 may be spaced apart from the upper and lower ends of the winding unit mold 161 at a certain distance, respectively.

The head portion 231 is formed to extend radially outward from the high-voltage winding portion 132. At this time, the head portion 231 overlaps the winding portion of the high-voltage winding portion 132 in the vertical direction.

A pillar portion 232 is formed between the two head portions 231.

The pillar portion 232 is a portion where the high-voltage winding portion 132 is directly wound.

A high-voltage winding portion 132 is wound around the outer peripheral surface of the pillar portion 232. Accordingly, the pillar portion 232 supports the high-voltage winding portion 132 radially on the inside and can prevent the high-voltage winding portion 132 from being separated at random.

The pillar portion 232 is formed in a pillar shape extending across the two head portions 231. In the illustrated embodiment, the pillar portion 232 is formed in the shape of a square pillar extending in the vertical direction. However, the pillar portion 232 is not limited to the shape shown and may be formed in various structures into which the high-voltage winding portion 132 can be wound.

High-voltage terminals 1321b and 1322b are formed at one end of the high-voltage winding portion 132 wound around the pillar portion 232. The high-voltage terminals 1321b and 1322b are supported by the terminal fixing part 24 to prevent arbitrary separation.

Below, the terminal fixing portion 24 will be described in more detail with reference to FIG. 13 .

The terminal fixing unit 24 fixes the high-voltage terminals 1321b and 1322b at a specific position so that the high-voltage lead wires 1321a and 1322a located inside the bushing mold 163 are not accidentally separated during the injection and curing process of the mold material.

The terminal fixing part 24 is located between the upper mold 21 and the lower mold 22 and is coupled to the upper mold 21 and the lower mold 22, respectively. Specifically, the terminal fixing part 24 is located between the upper terminal mold 216 and the lower terminal mold 226.

Additionally, the terminal fixing portion 24 is disposed adjacent to one side of the upper mold 21 and one side of the lower mold 22, respectively. In the illustrated embodiment, the terminal fixing portion 24 is disposed adjacent to the bottom surface of the upper mold 21 and the upper surface of the lower mold 22.

In one embodiment, one end of the terminal fixing part 24 is attached to the upper terminal mold 216 or the lower terminal mold when the terminal fixing part 24 is inserted between the upper terminal mold 216 and the lower terminal mold 226. One end of (226) may be spaced apart from each other at a certain distance. Accordingly, a predetermined space may be formed between one end of the terminal fixing part 24 and one end of the upper terminal mold 216 or the lower terminal mold 226.

In the illustrated embodiment, when the terminal fixing part 24 is inserted between the upper terminal mold and the lower terminal mold 226, its rear end is the rear end of the upper terminal mold 216 or the rear end of the lower terminal mold 226. They are spaced apart from each other at a certain distance.

The terminal fixing part 24 is coupled to the high voltage terminals 1321b and 1322b of the mold transformer 1. At this time, the high-voltage terminals 1321b and 1322b are spaced apart from the bottom surface of the upper mold 21 and the upper surface of the lower mold 22, respectively. In one embodiment, the high-voltage terminals 1321b and 1322b may be coupled to the center of the terminal fixing portion 24.

Accordingly, the high-voltage lead wires 1321a and 1322a connected to the high-voltage terminals 1321b and 1322b are fixed between the upper mold 21 and the lower mold 22 during the injection process of the mold material, and arbitrary separation can be prevented. That is, the bushing mold 163 with a uniform thickness can be formed around the high-voltage lead wires 1321a and 1322a. As a result, insulation breakdown and subsequent burnout accidents caused by the high-voltage lead wires 1321a and 1322a can be prevented. Furthermore, the durability and lifespan of the mold transformer 1 can be further increased.

The terminal fixing portion 24 is separated from the high-voltage terminals 1321b and 1322b after the injection and curing process of the mold material is completed, and is not included in the components of the mold transformer 1. Accordingly, the structure of the mold transformer 1 can be further simplified. Accordingly, the manufacturing cost of the mold transformer 1 can be further reduced. Furthermore, the weight of mold transformer 1 can be further reduced.

The terminal fixing portion 24 is formed in a plate shape. In the illustrated embodiment, the terminal fixing portion 24 is formed in a disk shape. However, the terminal fixing part 24 is not limited to the shape shown and may be formed in various structures. For example, the terminal fixing part 24 may be formed in a hexagonal plate shape.

The terminal fixing portion 24 has its upper and lower exteriors formed in shapes corresponding to the upper terminal mold 216 and the lower terminal mold 226, respectively. Accordingly, when the terminal fixing part 24 is inserted between the upper terminal mold 216 and the lower terminal mold 226, arbitrary separation of the terminal fixing part 24 can be prevented.

A terminal insertion portion 241 is formed on one surface of the terminal fixing portion 24.

The terminal insertion portion 241 is a portion where the high-voltage terminals 1321b and 1322b of the mold transformer 1 are directly coupled.

The terminal insertion portion 241 is recessed in one surface of the terminal fixing portion 24. The terminal insertion portion 241 is formed in a shape corresponding to the high voltage terminals 1321b and 1322b. In one embodiment, the terminal insertion portion 241 may be located at the center of the terminal fixing portion 24.

A plurality of terminal insertion portions 241 may be provided. At this time, the number of terminal insertion portions 241 is formed to be the same as the number of high-voltage terminals 1321b and 1322b.

In the illustrated embodiment, two terminal insertion units 241 are provided, a first terminal insertion unit 2411 and a second terminal insertion unit 2412. Two different high-voltage terminals 1321b and 1322b are coupled to the first terminal insertion portion 2411 and the second terminal insertion portion 2412. In one embodiment, the second terminal insertion portion 2412 and the second terminal insertion portion 2412 may be disposed in positions symmetrical to each other with respect to the center of the terminal insertion portion 241 .

A coupling protrusion 242 is provided on the side of the terminal fixing part 24.

The coupling protrusion 242 is inserted and coupled to at least one of the bottom surface of the upper mold 21 and the upper surface of the lower mold 22. In the illustrated embodiment, the coupling protrusion 242 engages and is coupled to the coupling hole 2261 of the terminal fixing part 24 of the lower terminal mold 226.

The coupling protrusion 242 is formed to protrude radially outward from the side surface of the terminal fixing portion 24. The coupling protrusion 242 is formed in a shape corresponding to the coupling hole 2261 of the terminal fixing part 24.

A plurality of coupling protrusions 242 may be provided. However, the number of coupling protrusions 242 is the same as the number of coupling holes 2261 of the terminal fixing part 24.

Above, the structure and components of the mold 2 for a mold transformer according to an embodiment of the present invention have been described. Below. The manufacturing process of the mold transformer 1 using the mold 2 for mold transformer will be described with reference to FIGS. 14 to 16.

FIG. 14 shows a state in which the high-voltage winding portion 132 and shield member 15 of the mold transformer 1 and the bobbin mold 23 of the mold transformer mold 2 are combined.

First, the high-voltage winding unit 132 is wound around the outer peripheral surface of the bobbin mold 23. In the illustrated embodiment, two different high-voltage windings 1321 and 1322 provided in the high-voltage winding unit 132 are each wound around two different bobbin molds 23.

At this time, the high-voltage lead wires 1321a and 1322a formed at one end of the high-voltage winding unit 132 extend in a direction away from the bobbin mold 23. Thereafter, the high-voltage lead wires 1321a and 1322a are penetrated and coupled to the shield member 15, and are disposed so that a portion thereof is surrounded by the shield member 15.

Next, the high-voltage winding part 132 is inserted into the upper mold 21 or the lower mold 22 in a state in which the high-voltage terminals 1321b and 1322b and the terminal fixing part 24 are combined (see FIG. 15). As described above, the high-voltage lead wires 1321a and 1322a are coupled to the shield member 15, and the shield member 15 is also inserted into the upper mold 21 or the lower mold 22 together with the high-voltage winding portion 132. .

The high-voltage winding portion 132 excluding the high-voltage lead wires 1321a and 1322a is inserted into the winding portion molds 213 and 223. The shield member 15 and some of the high-voltage lead wires 1321a and 1322a located inside the shield member 15 are inserted into the shield molds 214 and 224. Another part of the high-voltage lead wires 1321a and 1322a located outside the shield member 15 is inserted into the bushing molds 215 and 225. Additionally, the terminal fixing portion 24 into which the high-voltage terminals 1321b and 1322b are inserted is inserted into the terminal molds 216 and 226.

When the high-voltage winding part 132, the shield member 15, and the terminal fixing part 24 are inserted into any one of the upper mold 21 and the lower mold 22, one of the upper mold 21 and the lower mold 22 The remaining one is combined to cover the high-voltage winding part 132, the shield member 15, and the terminal fixing part 24.

Afterwards, the molten mold material is injected between the upper mold 21 and the lower mold 22. At this time, the mold material is injected through the mold inlets 211 and 221 to fill the space between the upper mold 21 and the lower mold 22, and excess mold material is discharged through the mold outlets 212 and 222.

In one embodiment, the mold material may be injected while the space between the upper mold 21 and the lower mold 22 is vacuum. Accordingly, the mold material can be uniformly distributed regardless of the injection direction.

When the injection of the mold material is completed, the mold material goes through a curing process and then the upper mold 21, lower mold 22, bobbin mold 23, and terminal fixing portion 24 are separated from the mold portion 16. (See Figure 16).

The mold portion 16 separated from the mold transformer mold 2 is dried for a certain period of time.

The mold portion 16 may be divided into a winding portion mold 161, a shield portion mold 162, and a bushing mold 163. The winding portion mold 161 is arranged to surround the high-voltage winding portion 132 except for the high-voltage lead wires 1321a and 1322a. The shield mold 162 is arranged to surround the shield member 15 and a portion of the high-voltage lead wires 1321a and 1322a located inside the shield member 15. The bushing mold 163 is arranged to surround another part of the high-voltage lead wires 1321a and 1322a located outside the shield member 15.

The bushing mold 163 is provided with a protrusion 1631 and a concave portion 1632 corresponding to the bushing large diameter portions 2151 and 2252 and the bushing small diameter portions 2152 and 2252 of the mold transformer mold 2.

Thereafter, the surfaces of the winding mold 161 and the shield mold 162 are coated with a semiconducting layer.

When the above process is completed, the mold portion 16 and the remaining components of the mold transformer 1 are combined. In the illustrated embodiment, the mold portion 16 is coupled with the winding portion 13, the insulating member 14, the iron core 12, and the support portion 11 excluding the high-voltage winding portion 132 (see Figure 1).

The winding unit 13 excluding the high-voltage winding unit 132 is coupled to the upper and lower sides of the winding unit mold 161, respectively. At this time, the winding part 13 may be supported radially on the inside by the bobbin-shaped insulating member 14.

The iron core 12 is coupled through the through hole formed in the winding mold 161. Accordingly, the winding portion 13 may be wound around the outer peripheral surface of the iron core 12.

The winding mold 161 combined with the iron core 12 may be supported in the vertical direction by the upper frame 111 and the lower frame 112. A support bar 113 is positioned between the upper frame 111 and the lower frame 112, so that a certain distance between the upper frame 111 and the lower frame 112 can be maintained.

3. Description of the manufacturing method of the mold transformer (1) according to an embodiment of the present invention

Hereinafter, a method of manufacturing the mold transformer 1 according to an embodiment of the present invention will be described with reference to FIG. 17.

The manufacturing method of the mold transformer 1 according to an embodiment of the present invention includes the step of coupling the terminal of the high-voltage winding part 132 to the terminal fixing part 24 (S100), the upper mold 21, and the lower mold 22. ) A step (S200) in which the high-voltage winding part 132, the terminal fixing part 24, and the shield member 15 are inserted into any one of the steps (S200), and the upper mold 21 is formed into the lower mold with the terminal fixing part 24 in between. A step of combining with (22) (S300), a step of injecting mold material between the upper mold 21 and the lower mold 22 (S400), a step of curing the mold material (S500), upper mold 21, lower mold The mold 22 and the terminal fixing part 24 are separated from the mold part 16 formed by curing the mold (S600), and the mold part 16 is dried at a preset drying temperature for a preset drying time. Step (S700), coating the winding portion mold 161 and the shield portion mold 162 with a semiconducting layer (S800), and forming the iron core 12, the insulating member 14, and the support portion 11 on the mold portion 16. It includes a step (S900) where each is combined.

First, the step (S100) in which the terminal of the high-voltage winding unit 132 is coupled to the terminal fixing unit 24 will be described.

First, the high-voltage winding portion 132 is wound around the outer peripheral surface of the bobbin mold 23 of the mold transformer mold 2. High-voltage lead wires 1321a and 1322a are formed at one end of the high-voltage winding unit 132 and are pulled out in a direction away from the bobbin mold 23.

The high-voltage lead wires 1321a and 1322a extend through the interior of the shield member 15. That is, a portion of the high-voltage lead wires 1321a and 1322a is surrounded by the shield member 15.

High-voltage terminals 1321b and 1322b are formed at one end of the high-voltage lead wires 1321a and 1322a. The high-voltage terminals 1321b and 1322b are inserted into and fixed to the terminal fixing portion 24 of the mold transformer mold 2.

The high-voltage winding part 132 combined with the terminal fixing part 24 is inserted into either the upper mold 21 or the lower mold 22.

Hereinafter, the step (S200) in which the high-voltage winding part 132, the terminal fixing part 24, and the shield member 15 are inserted into either the upper mold 21 or the lower mold 22 will be described.

The high-voltage winding part 132 is inserted into either the upper mold 21 or the lower mold 22 while being coupled to the shield member 15 and the terminal fixing part 24.

At this time, the high-voltage winding part 132 is inserted into the winding part molds 213 and 223, the shield part molds 214 and 224, and the bushing molds 215 and 225. The shield member 15 is inserted into the shield molds 214 and 224 while surrounding a portion of the high-voltage winding portion 132. Additionally, the terminal fixing part 24 is inserted into the terminal molds 216 and 226.

Afterwards, a step (S300) is performed in which the upper mold 21 is coupled to the lower mold 22 with the terminal fixing part 24 interposed therebetween.

As described above, the high-voltage winding part 132, the shield member 15, and the terminal fixing part 24 are inserted into either the upper mold 21 or the lower mold 22, and the upper mold 21 and A high-voltage winding unit 132 and a shield member 15 are located between the lower mold 22.

The upper mold 21 and the lower mold 22 overlap and are combined in the vertical direction. Specifically, the bottom surface of the upper mold 21 and the upper surface of the lower mold 22 are coupled so as to contact each other. In addition, the upper mold 21 and the lower mold 22 are coupled so that the interior is sealed except for the mold inlets 211 and 221 and mold outlets 221 and 222.

When the upper mold 21 and the lower mold 22 are combined, the molten mold material is injected between the upper mold 21 and the lower mold 22.

Below, the step (S400) in which mold material is injected between the upper mold 21 and the lower mold 22 will be described.

As the upper mold 21 and the lower mold 22 are combined, the upper mold inlet 211 and the lower mold inlet 221 are combined to form an inflow path for mold material, and the upper mold outlet 212 and the lower mold outlet (222) is combined to form a mold discharge path.

The mold material is introduced into the space between the upper mold 21 and the lower mold 22 through the mold inlets 211 and 221. The injected mold material fills the space between the upper mold 21 and the lower mold 22, and excess mold material is discharged through the mold discharge ports 212 and 222.

Accordingly, the mold part 16 surrounding the high-voltage winding part 132 can be completed through a single injection process. In addition, the upper mold 21, lower mold 22, and terminal fixing part 24 are easy to assemble and disassemble. Accordingly, the manufacturing process of the mold transformer 1 can be simplified and the manufacturing time can be shortened. As a result, the productivity of the mold transformer 1 can be maximized.

In one embodiment, the mold material may be injected while the space between the upper mold 21 and the lower mold 22 is vacuum. This is to ensure that the mold is uniformly distributed regardless of the injection direction.

In another embodiment, the mold portion 16 may be formed using an Automatic Pressure Gelation (APG) method.

Afterwards, a step (S500) in which the mold portion 16 is hardened is performed.

In the illustrated embodiment, the step of curing the mold portion 16 (S500) includes the step of curing the mold portion 16 at a preset temperature for a preset first time (S510) and the step of curing the mold portion 16 for a preset first time. It includes a step of curing by raising the temperature by a preset amount at each preset time interval for a second period of time (S520).

First, the step (S510) in which the mold part 16 is cured at a preset temperature for a preset first time will be described.

Prior to curing the mold portion 16, the mold transformer mold 2 may be preheated. In one embodiment, the mold transformer mold 2 may be preheated to 85° C. prior to curing the mold portion 16.

The preset first time is designed in consideration of the preset temperature and the possibility of cracks occurring inside the mold portion 16. Accordingly, the preset first time corresponding to the preset temperature decreases as the preset temperature increases.

In one embodiment, the preset temperature may be 70°C, and the first preset time may be 12 hours. In another embodiment, the preset temperature may be 130°C or more and 140°C or less, and the preset first time may be 1 hour or less.

When the primary curing process of the mold portion 16 is completed, a step (S520) in which the mold portion 16 is cured by raising the temperature by a preset amount at preset time intervals for a preset second time period is performed.

In an embodiment not shown, the step of curing the mold portion 16 (S500) may be performed in one step. However, in order to improve the durability of the mold portion 16, it may be performed in multiple steps as shown in the illustrated embodiment.

In one embodiment, the preset second time may be 8 hours, the preset time interval may be 2 hours, and the preset temperature may be 10°C. In the above embodiment, the temperature before secondary curing of the mold portion 16 may be 80°C.

In another embodiment, the temperature before secondary curing of the mold portion 16 may be 110°C or more and 130°C or less.

When the curing process of the mold part 16 is completely completed, the upper mold 21, the lower mold 22, and the terminal fixing part 24 are each separated from the mold part 16 (S600) and the mold part 16 ) is sequentially dried at a preset drying temperature for a preset drying time (S700).

In one embodiment, the preset drying temperature may be 110°C, and the preset drying time may be 6 hours.

Next, a step (S800) in which a semiconducting layer is coated on the winding portion mold 161 and the shield portion mold 162 is performed.

As described above, the mold portion 16 may be divided into a winding portion mold 161, a shield portion mold 162, and a bushing mold 163. At this time, a semiconducting layer is coated on the surfaces of the winding mold 161 and the shield mold 162. This is to alleviate the bias of the electric field on the surface of the mold part 16.

As a result, an electric field concentration phenomenon may occur at the boundary between the shield mold 162 coated with the semiconducting layer and the bushing mold 163 not coated with the semiconducting layer, but this occurs inside the shield mold 162 as described above. It can be alleviated by the shield member 15 being positioned.

Finally, when the step (S900) of coupling the iron core 12, the insulating member 14, and the support portion 11 to the mold portion 16 is performed, the manufacturing process of the mold transformer 1 is completed and the mold transformer ( 1) is completed.

Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited to the configuration of the above-described embodiments.

In addition, the present invention can be modified and changed in various ways by those skilled in the art to which the present invention pertains without departing from the spirit and scope of the present invention as set forth in the claims below.

Furthermore, the above embodiments may be configured by selectively combining all or part of each embodiment so that various modifications can be made.

1: mold transformer
11: support part
111: upper frame
112: lower frame
113: support
12: iron core
13: Winding section
131: Low-voltage winding section
1311: first low voltage winding
1312: second low voltage winding
132: High-voltage winding section
1321: first high voltage winding
1321a: first high voltage lead wire
1321b: first high pressure terminal
1322: Second high voltage winding
1322a: Second high voltage lead wire
1322b: second high voltage terminal
14: Insulating member
15: Shield member
151: blind man
152: Daegyeongbu
153: Ground section
16: Mold part
161: Winding part mold
162: Shield mold
163: Bushing mold
1631: protrusion
1632: recess
2: Mold for mold transformer
21: upper mold
211: upper mold inlet
212: upper mold outlet
213: Upper winding part mold
214: Upper shield mold
2141: Upper ground mold
215: upper bushing mold
2151: Upper bushing large diameter
2152: Upper bushing small diameter part
216: Upper terminal mold
22: Lower mold
221: lower mold inlet
222: Lower mold outlet
223: Lower winding mold
224: Lower shield mold
2241: Lower ground mold
225: Lower bushing mold
2251: Lower bushing large diameter
2252: Lower bushing small diameter part
226: Lower terminal mold
2261: Terminal fixing part coupling hole
23: Bobbin mold
231: Head part
232: Column part
24: terminal fixing part
241: terminal insertion part
2411: First terminal insertion part
2412: Second terminal insertion part
242: Combined protrusion

Claims (15)

A mold for a mold transformer used in the manufacture of a mold transformer,
a terminal fixing part coupled to the terminal part of the mold transformer;
an upper mold on one side of which the terminal fixing part is disposed adjacently; and
It includes a lower mold coupled to the upper mold with the terminal fixing part interposed therebetween,
The bottom surface of the upper mold and the upper surface of the lower mold are,
Collapsed into shapes that correspond to each other,
Mold Mold for transformer. According to paragraph 1,
The terminal fixing part,
The terminal portion of the mold transformer is coupled to the center,
The bottom surface of the upper mold and the upper surface of the lower mold are,
Each is spaced apart from the terminal portion of the mold transformer,
Mold Mold for transformer. According to paragraph 1,
The terminal fixing part,
Provided with a coupling protrusion inserted into and coupled to one of the bottom surface of the upper mold and the upper surface of the lower mold,
Mold Mold for transformer. According to paragraph 3,
At least one of the bottom surface of the upper mold and the upper surface of the lower mold,
The terminal fixing part coupling hole is formed in a shape corresponding to the coupling protrusion and engages with the coupling protrusion, and the coupling hole is recessed.
Mold Mold for transformer. According to paragraph 1,
On the bottom of the upper mold and the upper surface of the lower mold,
a winding portion mold recessed into a shape corresponding to the winding portion of the mold transformer;
a bushing mold recessed into a shape corresponding to the lead wire of the mold transformer; and
A terminal mold is provided, which is located on a side of the bushing mold opposite to the winding mold and is recessed into a shape corresponding to the terminal fixing portion,
The interior of the winding mold, the bushing mold, and the terminal mold are in communication with each other to enable mutual material movement,
Mold Mold for transformer. According to clause 5,
The terminal fixing part,
When inserted into the terminal mold, a predetermined space is formed between an end opposite to the bushing mold and an end opposite to the bushing mold of the terminal mold,
Mold Mold for transformer. According to clause 5,
The bottom surface of the upper mold and the upper surface of the lower mold are,
a mold inlet opening to one side of the upper mold and the lower mold; and
Open to one side of the upper mold and the lower mold, and comprising a mold outlet that is spaced apart from the mold inlet,
The remaining portions except the mold inlet and the mold outlet are sealed,
The mold inlet and the mold outlet are,
Each of the winding parts is in communication with the inside of the mold, allowing mutual material movement,
Mold Mold for transformer. According to clause 5,
The bushing mold is,
a plurality of bushing large diameter portions extending radially outward with respect to the axial direction; and
It is located between two neighboring large-diameter bushing parts, and includes a small-diameter bushing part whose cross-sectional area in the axial direction is formed to be smaller than the cross-sectional area of the large-diameter bushing part,
The bushing large diameter portion and the bushing small diameter portion are arranged alternately along the axial direction,
Mold Mold for transformer. According to paragraph 1,
The winding portion of the mold transformer is wound on an outer peripheral surface, and further includes a bobbin mold disposed between the upper mold and the lower mold,
The bottom surface of the upper mold and the upper surface of the lower mold are,
Each is spaced apart from the winding part of the mold transformer,
Mold Mold for transformer. A method of manufacturing a mold transformer using a mold for a mold transformer according to any one of claims 1 to 9,
(a) inserting the winding part, the terminal fixing part, and the shield member into one of the upper mold and the lower mold;
(b) combining the upper mold with the lower mold with the terminal fixing part interposed therebetween;
(c) injecting mold material between the upper mold and the lower mold;
(d) curing the mold to form the mold part; and
(e) comprising the step of separating the upper mold, the lower mold, and the terminal fixing portion from the mold portion, respectively,
Manufacturing method of mold transformer. According to clause 10,
Before step (a) above,
(a0) the step of coupling the terminal of the winding unit to the terminal fixing unit is performed,
Manufacturing method of mold transformer. According to clause 10,
In step (d),
(d1) curing the mold at a preset temperature for a first preset time; and
(d2) comprising curing the mold by raising the temperature by a preset amount at preset time intervals for a preset second time,
Manufacturing method of mold transformer. According to clause 10,
After step (e) above,
(f) drying the mold part at a preset drying temperature for a preset drying time is performed,
Manufacturing method of mold transformer. According to clause 13,
After step (f) above,
(g) a step of coating a semiconducting layer on the winding mold and the shield mold is performed,
Manufacturing method of mold transformer. According to clause 14,
After step (g) above,
(h) a step of coupling the iron core, the insulating member, and the support portion to the mold portion, respectively, is performed.
Manufacturing method of mold transformer.

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