A high-isolation transformer

Abstract

The utility model discloses a high isolation transformer, including sealed shell, set up primary side coil subassembly and secondary side coil subassembly on sealed shell, be provided with left connecting portion for primary side coil subassembly access and right connecting portion for secondary side coil subassembly access on sealed shell, left connecting portion with right connecting portion all are located in sealed shell. Through adopt above -mentioned structure, the utility model discloses a sealed shell realizes the installation of two coil subassembly, and adopts this mode to solve the problem of the creepage distance requirement of the safety regulations under the high -voltage scene, thereby satisfies the demand of using in high -voltage high -isolation occasion.

Description

Technical Field

[0001] This utility model relates to a high isolation transformer, and more particularly to a high isolation transformer with an integrated multi-isolation transformer structure. Background Technology

[0002] An isolation transformer is a transformer whose input and output windings are electrically isolated. Isolation transformers are used to prevent accidental simultaneous contact with live conductors. The isolation of the transformer involves isolating the currents in the primary and secondary windings. It is a specialized transformer with high insulation strength between the primary and secondary windings to isolate different potentials and suppress common-mode interference. The turns ratio of an isolation transformer is typically 1:1. With the continuous development of power systems, transformers play an increasingly important role as key equipment in power systems, and their safe operation is directly related to the reliability of the entire power system. Transformer coil deformation refers to the axial and radial dimensional changes, transformer body displacement, and coil twisting that occur when the coil is subjected to force. There are two main causes of transformer coil deformation: first, the transformer inevitably suffers from external short-circuit faults during operation; and second, accidental collisions occur during the transportation and hoisting of the transformer.

[0003] In view of the above, the current method is to use multiple series isolations. However, since such a structure is an independent separate structure, there are problems such as insufficient isolation at the series connection points and increased cost due to the series design in actual use. Therefore, there is an urgent need to provide a high isolation transformer that can overcome the above problems. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a high isolation transformer with an integrated structure and good isolation effect.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: a high isolation transformer, the innovation of which is that the high isolation transformer includes a sealed shell, a primary side coil assembly and a secondary side coil assembly disposed on the sealed shell, the sealed shell is provided with a left connecting part for the primary side coil assembly to be connected and a right connecting part for the secondary side coil assembly to be connected, and the left connecting part and the right connecting part are both located inside the sealed shell.

[0006] Preferably, the sealing shell is a rectangular shell structure that runs through the left and right sides, and both the left connecting part and the right connecting part are rectangular shell structures that run through the left and right sides. The left connecting part and the right connecting part are respectively connected to the inner wall of the sealing shell by ribs.

[0007] Preferably, the left connecting part and the right connecting part are an integral structure, and a heat dissipation cavity is formed between the left connecting part and the right connecting part and the inner wall of the sealing shell.

[0008] Preferably, the sealed outer shell is provided with air convection cooling holes that communicate with the heat dissipation cavity.

[0009] Preferably, the sealed outer shell is provided with at least two sets of air convection heat dissipation holes that communicate with the heat dissipation cavity.

[0010] Preferably, the primary coil assembly includes a primary bobbin, a primary coil wound on the primary bobbin, and a primary magnetic core disposed on the primary bobbin. The primary bobbin is provided with a primary mounting hole through which the intermediate magnetic post on the primary magnetic core passes. The intermediate magnetic post on the primary magnetic core is inserted into the left connecting portion, and the primary bobbin portion extends into the sealed housing.

[0011] Preferably, the middle magnetic post on the primary magnetic core is in direct contact with the middle of the left end face of the sealing shell, and the primary frame is provided with a left baffle that abuts against the left end face of the sealing shell. The left baffle includes an upper left baffle disposed above the primary frame and a lower left baffle disposed below the primary frame. The upper left baffle is in direct contact with the upper part of the left end face of the sealing shell, and the lower left baffle is in direct contact with the lower part of the left end face of the sealing shell.

[0012] Preferably, the secondary coil assembly includes a secondary frame, a secondary coil wound on the secondary frame, and a secondary magnetic core disposed on the secondary frame. The secondary frame is provided with a secondary mounting hole through which the intermediate magnetic post on the secondary magnetic core passes. The intermediate magnetic post on the secondary magnetic core is inserted into the right connecting part, and the secondary frame extends into the sealed housing.

[0013] Preferably, the middle magnetic post on the secondary magnetic core is in direct contact with the middle part of the right end face of the sealing shell, and the secondary frame is provided with a right baffle that abuts against the right end face of the sealing shell. The right baffle includes an upper right baffle disposed above the secondary frame and a lower right baffle disposed below the secondary frame. The upper right baffle is in direct contact with the upper part of the right end face of the sealing shell, and the lower right baffle is in direct contact with the lower part of the right end face of the sealing shell.

[0014] The advantages of this utility model are as follows: by adopting the above structure, this utility model uses a sealed shell to install two coil components. This method solves the problem of safety creepage distance requirements in high-voltage scenarios, thereby meeting the needs of use in high-voltage and high-isolation applications. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 This is a perspective view of a high isolation transformer according to this utility model.

[0017] Figure 2This is an exploded perspective view of a high isolation transformer according to this utility model.

[0018] Figure 3 This is a structural schematic diagram of a high isolation transformer according to this utility model.

[0019] Figure 4 This is a schematic diagram of the structure of a high isolation transformer of this utility model, which includes a sealed outer shell and a right connection part.

[0020] Figure 5 This is a schematic diagram of the application of a high isolation transformer of this utility model in a high isolation circuit.

[0021] In the diagram: 1-Sealed outer shell, 2-Left connecting part, 3-Right connecting part, 4-Heat dissipation cavity, 5-Air convection heat dissipation hole, 6-Primary frame, 7-Primary coil, 8-Primary magnetic core, 9-Primary mounting hole, 10-Upper left baffle, 11-Lower left baffle, 12-Secondary frame, 13-Secondary coil, 14-Secondary magnetic core, 15-Secondary mounting hole, 16-Upper right baffle, 17-Lower right baffle. Detailed Implementation

[0022] This utility model's high-isolation transformer includes a sealed housing 1, a primary-side coil assembly and a secondary-side coil assembly mounted on the sealed housing 1. The sealed housing 1 has a left connecting part 2 for accessing the primary-side coil assembly and a right connecting part 3 for accessing the secondary-side coil assembly, both located inside the sealed housing. By adopting the above structure, this utility model uses a single sealed housing to install two coil assemblies, thus solving the problem of creepage distance requirements under high-voltage scenarios and meeting the needs of high-voltage, high-isolation applications.

[0023] The sealing shell 1 of this utility model is a rectangular shell structure that runs through the left and right sides. The left connecting part 2 and the right connecting part 3 are also rectangular shell structures that run through the left and right sides. The left connecting part 2 and the right connecting part 3 are connected to the inner wall of the sealing shell 1 by ribs. To achieve good heat dissipation, the left connecting part 2 and the right connecting part 3 are an integral structure, forming a heat dissipation cavity 4 between the left connecting part 2 and the right connecting part 3 and the inner wall of the sealing shell 1. The sealing shell 1 is provided with air convection heat dissipation holes 5 that communicate with the heat dissipation cavity 4; at least two sets of air convection heat dissipation holes 5 communicating with the heat dissipation cavity 4 are provided on the sealing shell 1.

[0024] The aforementioned primary coil assembly includes a primary bobbin 6, a primary coil 7 wound on the primary bobbin 6, and a primary magnetic core 8 disposed on the primary bobbin 6. The primary bobbin 6 has a primary mounting hole 9 through which the intermediate magnetic post on the primary magnetic core 8 passes. The intermediate magnetic post on the primary magnetic core 8 is inserted into the left connecting part 2, and part of the primary bobbin 6 extends into the sealing shell 1. In order to seal the left end face of the heat dissipation cavity 4, the intermediate magnetic post on the primary magnetic core 8 is in direct contact with the middle part of the left end face of the sealing shell 1. The primary bobbin 6 is provided with a left baffle that abuts against the left end face of the sealing shell 1. The left baffle includes an upper left baffle 10 disposed above the primary bobbin 6 and a lower left baffle 11 disposed below the primary bobbin 6. The upper left baffle 10 is in direct contact with the upper part of the left end face of the sealing shell 1, and the lower left baffle 11 is in direct contact with the lower part of the left end face of the sealing shell 1.

[0025] The secondary coil assembly of this utility model includes a secondary frame 12, a secondary coil 13 wound on the secondary frame 12, and a secondary magnetic core 14 disposed on the secondary frame 12. The secondary frame 12 is provided with a secondary mounting hole 15 for the intermediate magnetic post on the secondary magnetic core 14 to pass through. The intermediate magnetic post on the secondary magnetic core 14 is inserted into the right connecting part 3, and part of the secondary frame 12 extends into the sealing shell 1. In order to seal the right end face of the heat dissipation cavity 4, the intermediate magnetic post on the secondary magnetic core 14 is in direct contact with the middle part of the right end face of the sealing shell 1. The secondary frame 12 is provided with a right baffle that abuts against the right end face of the sealing shell 1. The right baffle includes an upper right baffle 16 disposed above the secondary frame 12 and a lower right baffle 17 disposed below the secondary frame 12. The upper right baffle 16 is in direct contact with the upper part of the right end face of the sealing shell 1, and the lower right baffle 17 is in direct contact with the lower part of the right end face of the sealing shell 1.

[0026] like Figure 5 As shown, the high isolation transformer and optocoupler of this invention are used in combination in a high isolation circuit and are positioned between the input rectifier filter circuit and the output synchronous rectifier filter circuit.

[0027] The above embodiments are merely exemplary embodiments of this utility model and are not intended to limit this utility model. The scope of protection of this utility model is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this utility model within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered as falling within the scope of protection of this utility model.

Claims

1. A high isolation transformer, characterized in that: The high isolation transformer includes a sealed housing, a primary coil assembly and a secondary coil assembly disposed on the sealed housing. The sealed housing is provided with a left connection portion for accessing the primary coil assembly and a right connection portion for accessing the secondary coil assembly. Both the left connection portion and the right connection portion are located inside the sealed housing.

2. The high isolation transformer as described in claim 1, characterized in that: The sealing shell is a rectangular shell structure that runs through the left and right sides. Both the left connecting part and the right connecting part are rectangular shell structures that run through the left and right sides. The left connecting part and the right connecting part are connected to the inner wall of the sealing shell by stiffeners.

3. A high isolation transformer as described in claim 2, characterized in that: The left connecting part and the right connecting part are an integral structure, and a heat dissipation cavity is formed between the left connecting part and the right connecting part and the inner wall of the sealed shell.

4. A high isolation transformer as described in claim 3, characterized in that: The sealed outer shell is provided with air convection cooling holes that connect to the heat dissipation cavity.

5. A high isolation transformer as described in claim 4, characterized in that: The sealed outer shell is provided with at least two sets of air convection heat dissipation holes that connect to the heat dissipation cavity.

6. A high isolation transformer as described in claim 1, characterized in that: The primary coil assembly includes a primary bobbin, a primary coil wound on the primary bobbin, and a primary magnetic core disposed on the primary bobbin. The primary bobbin is provided with a primary mounting hole through which the intermediate magnetic post on the primary magnetic core passes. The intermediate magnetic post on the primary magnetic core is inserted into the left connecting part, and the primary bobbin part extends into the sealed housing.

7. A high isolation transformer as described in claim 6, characterized in that: The middle magnetic post on the primary magnetic core is in direct contact with the middle of the left end face of the sealing shell. The primary frame is provided with a left baffle that abuts against the left end face of the sealing shell. The left baffle includes an upper left baffle located above the primary frame and a lower left baffle located below the primary frame. The upper left baffle is in direct contact with the upper part of the left end face of the sealing shell, and the lower left baffle is in direct contact with the lower part of the left end face of the sealing shell.

8. A high isolation transformer as described in claim 1, characterized in that: The secondary coil assembly includes a secondary frame, a secondary coil wound on the secondary frame, and a secondary magnetic core disposed on the secondary frame. The secondary frame is provided with a secondary mounting hole through which the intermediate magnetic post on the secondary magnetic core passes. The intermediate magnetic post on the secondary magnetic core is inserted into the right connecting part, and the secondary frame part extends into the sealed housing.

9. A high isolation transformer as described in claim 8, characterized in that: The middle magnetic post on the secondary magnetic core is in direct contact with the middle of the right end face of the sealing shell. The secondary frame is provided with a right baffle that abuts against the right end face of the sealing shell. The right baffle includes an upper right baffle located above the secondary frame and a lower right baffle located below the secondary frame. The upper right baffle is in direct contact with the upper part of the right end face of the sealing shell, and the lower right baffle is in direct contact with the lower part of the right end face of the sealing shell.

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