Three-phase coherent isolating transformer

Abstract

The application discloses a three-phase coherent isolation transformer, and belongs to the technical field of transformers. The transformer comprises a winding, upper and lower yoke fixing structures arranged on the winding respectively, a first plate body with air holes arranged at the bottom of the winding, a first rod body arranged at the bottom of the first plate body, and a bottom frame connected to the bottom of the first rod body through a vertically arranged first support. The scheme solves the problems of traditional natural convection heat dissipation, poor adaptability of existing equipment and complex structure, and the device is stable in operation and long in service life.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformers, in particular to a three-phase dry-type isolation transformer. BACKGROUND

[0002] In the industrial production system, the three-phase dry-type isolation transformer as the core equipment of power conversion and safety isolation needs to be operated in the complex working conditions of high load, multiple vibration, dust or temperature fluctuation for a long time, and its structural stability and heat dissipation efficiency directly determine the equipment life, power supply reliability and operation safety. At present, the three-phase dry-type isolation transformer for industrial use generally has the problem of insufficient heat dissipation performance. When the transformer is running, the winding will continuously generate Joule heat due to electromagnetic induction, and if the heat cannot be timely discharged, it will cause the insulation layer of the winding to age accelerate, and even cause local overheating burnout failure. In the prior art, the traditional three-phase dry-type isolation transformer mostly adopts a natural convection heat dissipation scheme, and the natural convection relies on the spontaneous flow of air, and the heat dissipation efficiency is low and the positions around the winding that may not be cooled properly cannot realize full-domain efficient heat exchange.

[0003] To solve the above problems, some related improvement technologies have appeared in the industry, for example, the integrated core reactor containing a cooling structure disclosed in Korean Patent KR102857334B1, which forms an air layer by setting an angle pipe between the center core and the coil, and uses the air layer to assist heat dissipation, but this technology is aimed at the reactor rather than the three-phase dry-type isolation transformer, and its air layer relies on natural convection heat dissipation, and for example, the heat dissipation device for transformer disclosed in Korean Patent KR1020250084586A sets multiple phase flow inlets and multiple heat dissipation components, and uses refrigerant circulation to achieve heat dissipation, but this scheme has a complex structure, and needs to additionally configure a refrigerant storage and delivery system, which increases the equipment volume and cost, so the existing technology still has room for improvement in the adaptability and efficiency of heat dissipation. SUMMARY

[0004] The purpose of the present application is to provide a three-phase dry-type isolation transformer, which solves the problems of poor adaptability and complex structure of the traditional natural convection heat dissipation and existing equipment, and the device of the present application is stable in operation and has a long service life.

[0005] To solve the above technical problems, the present application specifically provides the following technical solutions: a three-phase coherent isolation transformer, comprising a winding, an upper yoke fixing structure and a lower yoke fixing structure arranged above and below the winding respectively, a first plate body with air holes arranged at the bottom of the winding, a first rod body arranged at the bottom of the first plate body, and a bottom frame connected to the first rod body through a vertically arranged first support.The upper yoke fixing structure and the lower yoke fixing structure are arranged above and below the winding respectively to position and fix the winding, thereby limiting the displacement of the winding during operation.Further, the first plate body at the bottom of the winding is used to bear the winding and the lower yoke fixing structure, and the air holes thereof provide a diffusion channel for the heat generated by the operation of the winding.The first rod body at the bottom of the first plate body cooperates with the vertically arranged first support and the bottom frame to form a layered support system to uniformly disperse the load of the components above, thereby avoiding local stress concentration and improving the overall structural stability and vibration resistance of the equipment.

[0006] According to an embodiment of the present application, first rod bodies are symmetrically arranged on both sides of the bottom of the first plate body and are parallel to each other, which are used to uniformly disperse the load of the components such as the winding and the lower yoke fixing structure borne by the first plate body to the support structure below, thereby avoiding deformation of the first plate body or imbalance of the support caused by unilateral stress concentration.The first rod body is connected to the first plate body through a damper arranged at intervals, which is used to absorb vibration energy in an industrial scene, weaken the transmission of vibration to the first plate body and the winding above, reduce the influence of vibration on the electromagnetic coupling accuracy of the winding, and further strengthen the overall vibration resistance and structural stability of the equipment.

[0007] According to an embodiment of the present application, the bottom frame is arranged at the bottom of the first plate body and the bottom surface thereof is connected with a bottom plate, which is used to expand the contact area of the equipment with the mounting surface, disperse the load transmitted by the bottom frame to a larger area, and avoid excessive local pressure from causing the equipment to sink into the mounting surface or damage the mounting surface.

[0008] According to an embodiment of the present application, a heat sink is arranged on at least one side surface of the first plate body, which is used to realize directional heat dissipation of the heat generated by the operation of the winding, shorten the heat transfer path, and has a shell, the side surface of the shell relative to the winding is provided with heat dissipation openings, the upper end surface of the shell is provided with heat dissipation openings, and the two side surfaces of the shell are provided with inflow openings.The side surface of the shell relative to the winding is a slope, which is used to increase the heat exchange area between the shell and the winding, and is better than a planar structure in receiving heat dissipated by the winding.Further, the inflow openings on the two side surfaces of the shell are used to introduce external cold air flow to provide a heat dissipation cold source, and the heat dissipation openings on the side surface of the shell relative to the winding and the upper end surface of the shell can quickly lead out the heat absorbed in the shell, forming a convection circulation of cold air flow-in-heat absorption-heat air flow-out, which can avoid the retention of heat around the winding.

[0009] According to an embodiment of the present application, the second plate body is horizontally arranged in the heat sink, and the second plate body is provided with a second fan assembly corresponding to the inlet opening position at each end, and the bottom of the second plate body is provided with a first fan assembly. The horizontally arranged second plate body in the heat sink is used to carry the second fan assembly and the first fan assembly, and the second fan assembly corresponds to the inlet opening position, which can actively suck the external cold air flow from the inlet opening and direct the cold source into the shell, while the first fan assembly at the bottom of the second plate body sends air upward to push the air circulation in the shell, and the cold air flow introduced by the second fan assembly forms a convection, so that the cold air flow fully covers the inside of the heat sink and the periphery of the winding, quickly absorbs heat and is discharged from the heat dissipation opening to improve the heat dissipation efficiency, so as to avoid high temperature aging of the winding.

[0010] According to an embodiment of the present application, the second fan assembly is provided with metal sheets arranged in sequence and horizontally spaced in the outflow direction, and the metal sheets are provided with insertion holes and inserted with insertion rods. The metal sheets are arranged in parallel above the second plate body, and adjacent metal sheets have a spacing distance, and the metal sheets are horizontally placed to be parallel to the outflow direction of the second fan assembly.

[0011] The second fan assembly is provided with metal sheets arranged in sequence and horizontally spaced in the outflow direction and parallel to the outflow direction, the metal sheets can quickly absorb the heat emitted by the winding in the cold air flow transported by the second fan assembly, and the spacing distance between adjacent metal sheets can ensure smooth airflow, avoid heat retention, and further the insertion holes in the metal sheets are inserted with the insertion rods to fix the parallel position of the metal sheets above the second plate body, prevent the metal sheets from shifting and disturbing the airflow path, and strengthen the heat dissipation effect to quickly reduce the temperature of the winding.

[0012] According to an embodiment of the present application, the second fan assembly is provided with a substrate, and the two sides of the substrate are provided with flow guides, and the flow guides are vertically arranged plates relative to the second plate body, and the flow guides are hollow and through the two ends, so that the airflow at the bottom of the second plate body can flow upward through the flow guides.

[0013] The base plate between the second fan assemblies can effectively separate the two assemblies, avoid mutual interference of air flow, ensure the stability of the respective outflow direction, realize directional flow of air flow and provide structural support, and further, the flow guide members vertically arranged on both sides of the base plate relative to the second plate body, wherein the hollow through structure can not only guide the air flow at the bottom of the second plate body upwards, but also constrain the air flow path to avoid air flow dispersion leading to air supply loss, improve the air supply efficiency of the first fan assembly, and help the air flow to quickly reach the heat dissipation opening at the upper end of the shell for discharge, thereby strengthening the overall convection, specifically, the complete convection circulation of the air supply from the bottom and then the upward flow guide from the top, at the same time, the vertically arranged flow guide members can assist in supporting the base plate, enhance the structural stability of the base plate under the impact of air flow, prevent the base plate from shifting and disrupting the air flow direction, and the air flow guided by the flow guide members can be more uniformly combined with the cold air flow introduced by the second fan assembly, thereby avoiding the formation of hot spots due to local air flow weakness in the radiator, making the heat dissipation more balanced, and further protecting the winding from local high temperature damage.

[0014] According to an embodiment of the present application, the first fan assembly includes a fan, and metal fins are arranged around the side of the fan at intervals. The bottom of the radiator has an opening, and the opening is in communication with the bottom plate of the bottom. The fan in the first fan assembly actively supplies air upward, pushes the air flow at the bottom of the second plate body to flow upward, and makes it combine with the cold air flow introduced by the second fan assembly, thereby accelerating the movement of heat to the heat dissipation opening of the shell. Further, the metal fins arranged around the side of the fan at intervals are used to quickly absorb the surrounding heat, and the interval design does not hinder the flow of air.

[0015] According to an embodiment of the present application, at least two column sleeves are arranged between the fins, the second column body is arranged in the column sleeve, the second column body can move up and down relative to the column sleeve, a spring is arranged outside the second column body, and the upper end of the second column body is provided with a first column body connected with the bottom of the second plate body. The bottom of the second column body is connected with the bottom plate, thereby providing support for the second plate body, the second fan assembly and other components above, and uniformly dispersing the load, avoiding deformation of the second plate body and disrupting the air flow path, at the same time, the second column body can move up and down relative to the column sleeve, and the external spring can absorb the vibration of the industrial scene, reduce the vibration transmission to the second plate body and the fan, ensure the stable air supply of the fan, maintain the air circulation efficiency in the radiator, strengthen the heat dissipation effect, and avoid the winding from aging due to high temperature.

[0016] In addition, the column sleeve between the fins cooperates with the built-in second column, the external spring and the first column to provide vertical support for the second plate body in addition to buffering vibration. Specifically, through the connection of the first column and the bottom of the second plate body and the connection of the second column and the bottom plate, a support structure combining rigidity and elasticity is formed to avoid bending deformation of the second plate body due to bearing of the second fan assembly and other components. Meanwhile, the mobility of the second column relative to the column sleeve can adapt to the thermal expansion and contraction of the components during operation, and the elastic expansion and contraction of the spring can compensate for the size change to prevent cracks caused by thermal deformation of the rigid structure. In addition, the structure can also reduce the radial shaking of the fan during operation to ensure the stability of the fan air supply direction and avoid airflow deviation affecting the heat dissipation efficiency.

[0017] According to an embodiment of the present application, the second plate body is a hole plate, and the holes thereof can realize bidirectional airflow circulation up and down, so that the airflow delivered upward by the first fan assembly can penetrate above the second plate body and fully mix with the cold air introduced by the second fan assembly to avoid airflow stagnation inside the radiator, and at the same time, the weight of the second plate body is reduced while stably bearing the second fan assembly, the substrate and the flow guide.

[0018] Compared with the prior art, the present application has the following advantages: the present application optimizes the shell structure of the radiator, the built-in fan assembly, the flow guide, the metal sheet and other components to realize rapid heat transfer and full-area uniform heat dissipation, avoid local high-temperature aging of the winding, and weaken vibration transmission by means of the elastic support structure of the damper, the column sleeve, the second column and the spring 526, and the first rod, the first support and the chassis to prevent displacement of the winding and deformation of the components. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only exemplary, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0020] Figure 1 The first scheme of the three-phase dry-type isolation transformer of the present application is shown in the figure.

[0021] Figure 2 The bottom scheme of the three-phase dry-type isolation transformer of the present application is shown in the figure.

[0022] Figure 3 The connection scheme of the first plate body and the first rod of the present application is shown in the figure.

[0023] Figure 4 The internal structure of the radiator of the present application is shown in the figure.

[0024] Figure 5A schematic diagram of a connection scheme of the flow guide and the base plate of the present application;

[0025] Figure 6 A schematic diagram of the first fan scheme of the present application;

[0026] Figure 7 A schematic diagram of the second scheme of the three-phase dry-type isolation transformer of the present application;

[0027] Figure 8 A schematic diagram of the third scheme of the three-phase dry-type isolation transformer of the present application.

[0028] Legend: 10. winding; 20. upper yoke fixing structure; 30. lower yoke fixing structure; 40. first plate body; 41. first support; 42. damper; 43. first rod body; 44. base frame; 45. bottom plate; 50. heat sink; 51. second plate body; 52. first fan assembly; 521. fan; 522. fin; 523. column sleeve; 524. first column body; 525. second column body; 526. spring; 53. second fan assembly; 54. flow guide; 55. base plate; 56. metal sheet; 57. insertion rod; 60. first side plate; 61. second side plate. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0030] The concepts involved in the present application will be described below with reference to the drawings. It should be noted that the following descriptions of the concepts are only for the purpose of making the content of the present application easier to understand, and do not limit the scope of protection of the present application. Meanwhile, the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0031] Embodiment 1

[0032] As shown in the drawings Figure 1 -Appendix Figure 6As shown, the three-phase coherent isolation transformer includes a winding 10, an upper yoke fixing structure 20 and a lower yoke fixing structure 30 arranged above and below the winding 10 respectively, a first plate body 40 with air holes arranged at the bottom of the winding 10, a first rod body 43 arranged at the bottom of the first plate body 40, and a bottom frame 44 connected to the first rod body 43 through a vertically arranged first support 41. The upper yoke fixing structure 20 and the lower yoke fixing structure 30 are arranged above and below the winding 10 respectively to position and fix the winding 10, thereby limiting the displacement of the winding 10 during operation. Further, the first plate body 40 at the bottom of the winding 10 is used to bear the winding 10 and the lower yoke fixing structure 30, and the air holes thereof provide a diffusion channel for the heat generated by the operation of the winding 10. The first rod body 43 at the bottom of the first plate body 40 cooperates with the vertically arranged first support 41 and the bottom frame 44 to form a layered support system to uniformly disperse the load of the components above, thereby avoiding local stress concentration and improving the overall structural stability and vibration resistance of the equipment.

[0033] The first plate body 40 is symmetrically provided with first rod bodies 43 parallel to each other at both sides of the bottom thereof, which are used to uniformly disperse the load of the components such as the winding 10 and the lower yoke fixing structure 30 borne by the first plate body 40 to the support structure below, thereby avoiding deformation or imbalance of the first plate body 40 caused by unilateral stress concentration. The first rod body 43 is connected to the first plate body 40 through the dampers 42 arranged at intervals, which are used to absorb vibration energy in industrial scenes, weaken the transmission of vibration to the first plate body 40 and the winding 10 above, reduce the influence of vibration on the electromagnetic coupling accuracy of the winding 10, and further strengthen the overall vibration resistance and structural stability of the equipment.

[0034] The bottom frame 44 is arranged at the bottom of the first plate body 40 and connected with a bottom plate 45 at the bottom surface thereof. The bottom plate 45 is used to expand the contact area of the equipment with the mounting surface, disperse the load transmitted by the bottom frame 44 to a larger area, and avoid excessive local pressure from causing the equipment to sink into the mounting surface or damage the mounting surface.

[0035] The first plate body 40 is provided with a heat sink 50 on at least one side surface thereof, which realizes directional heat dissipation of the heat generated by the operation of the winding 10, shortens the heat transfer path, and has a shell with heat dissipation openings on the side surface opposite to the winding 10, a heat dissipation opening on the upper end surface, and inflow openings on the two side surfaces. The side surface of the shell opposite to the winding 10 is inclined, which increases the heat exchange area between the shell and the winding 10, and helps to better receive the heat dissipated by the winding 10 compared to a planar structure. Further, the inflow openings on the two side surfaces of the shell are used to introduce external cold air flow to provide a heat dissipation cold source. The heat dissipation openings on the side surface and the upper end surface of the shell opposite to the winding 10 can quickly lead out the heat absorbed in the shell, forming a convection circulation of cold air inflow-heat absorption-heat outflow, which can avoid the retention of heat around the winding 10.

[0036] The second plate body 51 is horizontally arranged in the radiator 50, and the second plate body 51 is provided with the second fan assembly 53 corresponding to the position of the inflow opening at both ends, and the bottom of the second plate body 51 is provided with the first fan assembly 52. The horizontal second plate body 51 arranged in the radiator 50 is used to carry the second fan assembly 53 and the first fan assembly 52, and the second fan assembly 53 corresponds to the position of the inflow opening, can actively suck the external cold air flow from the inflow opening, and direct the cold source to the shell, and the first fan assembly 52 at the bottom of the second plate body 51 blows air upward to push the air circulation in the shell, and forms convection with the cold air flow introduced by the second fan assembly 53, so that the cold air flow fully covers the inside of the radiator 50 and the periphery of the winding 10, quickly absorbs heat and is discharged from the heat dissipation opening to improve the heat dissipation efficiency, so as to avoid high temperature aging of the winding 10.

[0037] The second fan assembly 53 is provided with metal sheets 56 arranged in sequence and horizontally spaced in the outflow direction, and the metal sheets 56 are provided with insertion holes and inserted with insertion rods 57. The metal sheets 56 are arranged in parallel above the second plate body 51, and adjacent metal sheets 56 have a spacing distance, and the metal sheets 56 are horizontally arranged to be parallel to the outflow direction of the second fan assembly 53.

[0038] The second fan assembly 53 is provided with metal sheets 56 arranged in sequence and horizontally spaced in the outflow direction, and the metal sheets 56 are provided with insertion holes and inserted with insertion rods 57. The metal sheets 56 are arranged in parallel above the second plate body 51, and adjacent metal sheets 56 have a spacing distance, and the metal sheets 56 are horizontally arranged to be parallel to the outflow direction of the second fan assembly 53.

[0039] The second fan assembly 53 is provided with a base plate 55, and the base plate 55 is provided with a flow guide 54 on both sides. The flow guide 54 is a plate body arranged vertically relative to the second plate body 51, and the flow guide 54 is hollow and penetrates both ends, so that the air flow at the bottom of the second plate body 51 can flow upward through the flow guide 54.

[0040] The base plate 55 between the second fan assemblies 53 can effectively separate the two assemblies to avoid mutual interference of air flow, ensure the stability of the respective outflow direction, realize directional air flow, and provide structural support. Further, the flow guide 54 vertically arranged on both sides of the base plate 55 can guide the air flow upwards from the bottom of the second plate body 51 and constrain the air flow path to avoid air flow dispersion and loss, thereby improving the air supply efficiency of the first fan assembly 52 and helping the air flow to quickly reach the heat dissipation opening at the upper end of the shell for discharge, thereby strengthening the overall convection. Specifically, the complete convection cycle is achieved by directing the air flow upwards from the bottom and discharging it from the top. At the same time, the vertically arranged flow guide 54 can assist in supporting the base plate 55 to enhance the structural stability of the base plate 55 under the impact of air flow, prevent the base plate from shifting and disrupting the air flow direction, and more evenly combine the air flow guided by the flow guide 54 with the cold air flow introduced by the second fan assembly 53 to avoid the formation of hot spots due to weak air flow in the local area of the heat sink 50, thereby achieving more balanced heat dissipation and further protecting the winding 10 from local high temperature damage.

[0041] The first fan assembly 52 includes a fan 521, and metal fins 522 are arranged around the sides of the fan 521. The bottom of the heat sink 50 has an opening that is in communication with the bottom plate 45. The fan 521 in the first fan assembly 52 actively supplies air upwards to push the air flow at the bottom of the second plate body 51 upwards, thereby combining with the cold air flow introduced by the second fan assembly 53 to accelerate the movement of heat towards the heat dissipation opening of the shell. Further, the metal fins 522 arranged around the sides of the fan 521 are used to quickly absorb the surrounding heat, and the spacing design does not hinder the flow of air.

[0042] At least two column sleeves 523 are arranged between the fins 522, and a second column 525 is arranged in the column sleeve 523. The second column 525 can move up and down relative to the column sleeve 523. A spring 526 is arranged outside the second column 525. The upper end of the second column 525 is connected to the first column 524 at the bottom of the second plate body 51. The bottom of the second column 525 is connected to the bottom plate 45, thereby providing support for the second plate body 51, the second fan assembly 53 above, and other components, and evenly distributing the load to avoid deformation of the second plate body 51 and disruption of the air flow path. At the same time, the second column 525 can move up and down relative to the column sleeve 523, and the external spring 526 can absorb the vibration of the industrial scene to reduce the transmission of vibration to the second plate body 51 and the fan 521, thereby ensuring stable air supply of the fan 521, maintaining the air circulation efficiency inside the heat sink 50, strengthening the heat dissipation effect, and avoiding aging of the winding 10 due to high temperature.

[0043] In addition, the sleeves 523 between the fins 522 cooperate with the built-in second column 525, the external spring 526, and the first column 524 to not only buffer vibration but also provide vertical support for the second plate 51. Specifically, the connection between the first column 524 and the bottom of the second plate 51, and between the second column 525 and the base plate 45, forms a support structure that combines rigidity and elasticity. This prevents the second plate 51 from bending and deforming due to bearing the second fan assembly 53 and other components. At the same time, the mobility of the second column 525 relative to the sleeves 523 can adapt to the thermal expansion and contraction of the components during equipment operation. The elastic extension and contraction of the spring 526 compensates for dimensional changes, preventing the rigid structure from cracking due to thermal deformation. Furthermore, this structure can reduce the radial sway of the fan 521 during operation, ensuring the stability of the fan 521's airflow direction and preventing airflow deviation from affecting heat dissipation efficiency.

[0044] The second plate 51 is a perforated plate, and its holes can realize bidirectional airflow. This allows the airflow delivered upward by the first fan assembly 52 to penetrate to the top of the second plate 51 and fully mix with the cold airflow introduced by the second fan assembly 53, preventing the airflow from stagnating inside the heat sink 50. It can also reduce its own weight while stably supporting the second fan assembly 53, the base plate 55 and the air guide 54.

[0045] Example 2

[0046] See appendix Figure 1 As shown, the heat sink 50 is located below the first plate 40. The heat sink 50, located below the first plate 40, can directly receive the heat transferred downwards from the winding 10 through the first plate 40 with ventilation holes, shortening the heat transfer path and preventing heat from accumulating at the bottom of the winding 10.

[0047] Example 3

[0048] See appendix Figure 7 As shown, the radiator 50 is located above the first plate 40. The radiator 50 is positioned above the first plate 40, allowing it to be directly close to the heat-generating winding 10, thus shortening the heat transfer path from the winding 10 to the radiator 50 and preventing heat from accumulating between the winding 10 and the first plate 40.

[0049] Example 4

[0050] See appendix Figure 8As shown, the first side plate 60 is arranged obliquely on both sides of the winding 10, the bottom of the first side plate 60 is connected with the first plate body 40, the upper end of the first side plate 60 is provided with a second side plate 61 which is arranged parallel to the first plate body 40. The first side plate 60 arranged obliquely on both sides of the winding 10 is connected with the first plate body 40 at the bottom, so as to block the dust in the industrial scene and the external force impacting the winding 10, avoid damaging the insulation layer of the winding 10, and guide the airflow on the side to gather in the heat dissipation area, thereby assisting the heat dissipation of the winding 10. In addition, the second side plate 61 parallel to the first plate body 40 at the upper end of the first side plate 60 is used for guiding the top hot airflow, and cooperates with the heat dissipation opening of the heat sink 50 to accelerate the heat dissipation of the hot air.

[0051] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting" and the like should be broadly understood, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium; and can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] The above-described embodiments and / or implementations are only used to illustrate the preferred embodiments and / or implementations of the present application, and do not limit the embodiments of the present application in any form. Any person skilled in the art can make some changes or modifications to other equivalent embodiments without departing from the scope of the technical means disclosed in the present application, but should be considered as substantially the same technology or embodiment as the present application.

[0053] The principles and implementations of the present application are described by using specific examples. The above description of the embodiments is only used to help understand the method and its core idea. The above description is only the preferred embodiment of the present application. It should be pointed out that due to the limitation of the expression, there are infinite specific structures. For those skilled in the art, without departing from the principles of the present application, some improvements, refinements or changes can be made, and the above technical features can be combined in an appropriate way. These improvements, refinements, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be considered as the protection scope of the present application.

Claims

1. A three-phase coherent isolation transformer comprising a winding (10), an upper yoke fixing structure (20) and a lower yoke fixing structure (30) being respectively arranged above and below the winding (10), characterized in that, The winding (10) is provided with a first plate body (40) with air holes at the bottom, the first plate body (40) is provided with a first rod body (43) at the bottom, and the first rod body (43) is connected with a bottom frame (44) through a vertically arranged first support (41); At least one side of the first plate body (40) is provided with a radiator (50), the radiator (50) has a shell, the shell has heat dissipation openings on the side surface relative to the winding (10), the shell has heat dissipation openings on the upper end surface, and the shell has inflow openings on the two side surfaces; The radiator (50) is provided with a horizontally arranged second plate body (51) inside, the second plate body (51) is provided with a second fan assembly (53) corresponding to the position of the inflow opening at each end, and the second plate body (51) is provided with a first fan assembly (52) at the bottom; The base plate (55) is provided between the second fan assemblies (53), the base plate (55) is provided with a flow guide piece (54) on each side surface, the flow guide piece (54) is a vertically arranged plate body relative to the second plate body (51), and the flow guide piece (54) is hollow and penetrates through both ends, so that the airflow at the bottom of the second plate body (51) can flow upwards through the flow guide piece (54).

2. The three-phase dry-type isolation transformer of claim 1, wherein, The first plate body (40) is provided with first rod bodies (43) that are parallel to each other and symmetrically arranged at the bottom of the first plate body (40), and the first rod bodies (43) are connected with the first plate body (40) through the dampers (42) arranged at intervals.

3. The three-phase dry-type isolation transformer of claim 1, wherein, The bottom frame (44) is arranged at the bottom of the first plate body (40) and connected with the bottom plate (45) at the bottom surface.

4. The three-phase dry-type isolation transformer of claim 1, wherein, The second fan assembly (53) is provided with metal sheets (56) arranged at intervals in sequence in the outflow direction, the metal sheets (56) are provided with insertion holes and inserted with insertion rods (57).

5. The three-phase dry-type isolation transformer of claim 1, wherein, The first fan assembly (52) comprises a fan (521), and the fan (521) is surrounded by metal fins (522) arranged at intervals on the side surface.

6. The three-phase dry-type isolation transformer of claim 5, wherein, At least two column sleeves (523) are arranged between the fins (522), the column sleeves (523) are provided with second column bodies (525) inside, the second column bodies (525) can move up and down relative to the column sleeves (523), springs (526) are arranged outside the second column bodies (525), and the second column bodies (525) are provided with first column bodies (524) connected with the bottom of the second plate body (51) at the upper end.

7. The three-phase dry-type isolation transformer of claim 1, wherein, The second plate body (51) is a perforated plate.

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