CN217588624U

CN217588624U - Transformer with high-low voltage general structure

Info

Publication number: CN217588624U
Application number: CN202221335007.5U
Authority: CN
Inventors: 钱江
Original assignee: Wuxi Fule Electronics Co ltd
Current assignee: Wuxi Fule Electronics Co ltd
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2022-10-14
Anticipated expiration: 2032-05-31

Abstract

The utility model discloses a transformer with high-low voltage universal architecture, including magnetic core, primary, secondary and skeleton, the magnetic core is the annular structure, just the magnetic core contains the iron core post that two symmetries set up, two the cover is equipped with the skeleton respectively on the iron core post, two around being equipped with primary, secondary on the skeleton respectively, interval setting and constitution heat dissipation air flue between primary and the secondary can be applicable to in low pressure and the high-pressure environment, and also the mounting means has the commonality. The primary winding, the secondary winding and the end plates of the corresponding frameworks are arranged at intervals, air channels are formed in the coils and close to the edges of the end plates of the frameworks to serve as end spaces, the creepage distance and the electric clearance can be increased, and the air channels can be filled with epoxy resin to ensure the effective safety distance of high voltage aiming at a high-voltage application scene.

Description

Transformer with high-low voltage general structure

Technical Field

The utility model belongs to the transformer field, in particular to transformer with high-low pressure universal architecture.

Background

At present, a low-voltage transformer and a high-voltage transformer are designed independently, and the structure of the low-voltage transformer cannot be directly applied to the high-voltage transformer. On the contrary, the structure of the high-voltage transformer often adopts complex processes such as epoxy potting and the like, and the high-voltage transformer cannot be well transplanted to the design and production of the medium and small power transformer. However, the voltage magnitude is not clearly distinguished between low voltage and high voltage (especially in medium voltage), it is difficult to visually identify whether the transformer belongs to a low-voltage transformer or a high-voltage transformer, and due to the specificity of the high voltage, if the insulation characteristic is not processed well, the influence which is not intended is possibly brought. The traditional low-voltage transformer and high-voltage transformer are fixed in installation modes, are designed specifically for specific application occasions, have no universality and universality, and have large limitations.

Disclosure of Invention

The invention aims to: in order to overcome the not enough that exists among the prior art, the utility model provides a transformer with high-low pressure universal architecture can be applicable to in low pressure and the high-pressure environment, and also the mounting means has the commonality.

The technical scheme is as follows: in order to achieve the above purpose, the technical scheme of the utility model is as follows:

the utility model provides a transformer with high-low voltage universal architecture, includes magnetic core, primary, secondary and skeleton, the magnetic core is the annular structure, just the magnetic core contains the magnetic core post that two symmetries set up, two the cover is equipped with the skeleton respectively on the magnetic core post, two around being equipped with primary, secondary on the skeleton respectively, interval setting just constitutes the heat dissipation air flue between primary and the secondary, just the axial both ends of skeleton include the end plate respectively, interval setting between the end plate of primary, secondary and the skeleton that corresponds, the both sides of the iron yoke portion of magnetic core are provided with upper bracket, lower carriage respectively, be provided with the wiring terminal platform on the upper bracket.

Furthermore, the magnetic core contains a plurality of silicon steel sheets that are stacked, the silicon steel sheets are provided with mounting holes for fastening in a penetrating manner, the magnetic core is fastened between the upper support and the lower support through a connecting mechanism, and an upper insulating clamping plate and a lower insulating clamping plate are respectively arranged between the magnetic core and the upper support and between the magnetic core and the lower support.

Furthermore, T-shaped insulating sleeves are arranged in the mounting holes of the magnetic cores corresponding to the connecting mechanisms.

Further, coupling mechanism includes screw rod and nut one, the screw rod wear to establish through after lower carriage, lower insulating splint, mounting hole, insulating cover, upper insulating splint, the upper bracket with nut one is connected.

Further, still be provided with the terminal backup pad on the screw rod, terminal backup pad interval is in the upper bracket device, the terminal platform sets up on the terminal backup pad.

Furthermore, a grounding copper foil is arranged between one iron yoke part of the magnetic core and the lower bracket, and the grounding copper foil is respectively in close contact with the iron yoke part and the lower bracket.

Furthermore, the grounding copper foil is of a U-shaped folding structure, two arms of the grounding copper foil are attached to two sides of the lower insulating clamp plate, and the grounding copper foil is clamped by the magnetic core, the lower insulating clamp plate and the lower support together.

Furthermore, the framework is of a sleeve type structure, two axial ends of the framework respectively comprise end plates, and a plurality of heat dissipation grooves are formed in the end plates.

Has the advantages that: the utility model discloses a skeleton is kept apart winding coil and magnetic core insulation, has stronger insulating properties and security, and the heat dissipation air flue that constitutes between two coil windings can strengthen the air current convection current, promotes heat dispersion, and overall structure can be installed on the supporting body with modes such as horizontal, vertical through the lower carriage.

The primary winding, the secondary winding and the end plates of the corresponding frameworks are arranged at intervals, air channels are formed in the coils and close to the edges of the end plates of the frameworks to serve as end spaces, the creepage distance and the electric clearance can be increased, and the air channels can be filled with epoxy resin to ensure the effective safety distance of high voltage aiming at a high-voltage application scene.

Drawings

FIG. 1 is a perspective view of the transformer of the present invention;

FIG. 2 is an exploded view of the transformer structure of the present invention;

FIG. 3 is a schematic structural view of the framework of the present invention;

fig. 4 is a schematic structural diagram of the silicon steel sheet in the magnetic core of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1 and fig. 2, a transformer with a high-voltage and low-voltage general structure includes a magnetic core 1, a primary winding 2, a secondary winding 3, and a skeleton, where the magnetic core 1 is in a "mouth" shaped annular structure, the magnetic core 1 includes two iron core columns symmetrically arranged, the two iron core columns are arranged in parallel, the two iron core columns are respectively sleeved with a skeleton, the skeleton is an insulator structure, the two skeletons are respectively wound with the primary winding 2 and the secondary winding 3, the primary winding 2 and the secondary winding 3 are arranged at an interval and form a heat dissipation air duct, two sides of an iron yoke portion of the magnetic core 1 are respectively provided with an upper bracket 4 and a lower bracket 5, the upper bracket 4 is provided with a connection terminal block 13, the connection terminal block 13 is used as an outgoing line of a coil winding to connect, and is used as a transformer pin, and the overall structure can be installed on a supporting body in a horizontal and vertical manner through the lower bracket without interfering with the pin portion. The winding coils are isolated from the magnetic core in an insulating mode through the framework, the insulating property and the safety are high, the heat dissipation air channel formed between the two coil windings can enhance air flow convection, and the heat dissipation performance is improved.

As shown in fig. 3, the framework is of a sleeve type structure, and adopts an i-shaped structure with a rectangular through hole therein for mounting the silicon steel sheet, and the two axial ends of the framework respectively include an end plate 21, and the end plate 21 is provided with a plurality of heat dissipation grooves 22. When the transformer is used, the heat dissipation performance of the coil winding can be improved.

The primary winding, the secondary winding and the end plates 21 of the corresponding frameworks are arranged at intervals, namely, the two ends of the primary winding and the secondary winding are arranged at intervals with the end plates 21 on the two sides in the installation process of the primary winding and the secondary winding, an air channel is formed inside the coil and close to the edges of the end plates of the frameworks to serve as an end air, the creepage distance and the electric gap can be increased for the air channel under low pressure, and the air channel can be filled with epoxy resin to ensure the effective safety distance under high pressure for a high-pressure application scene.

The coils are distributed on the two iron core columns, and through the serial connection and the parallel connection of the coils, various selections of single-winding output or multi-winding output are formed, and the use flexibility is increased.

The magnetic core is formed by splicing punched single thin silicon steel sheets, the size of the steel sheets can be properly increased or shortened according to the requirements of the power capacity and the voltage value of the transformer, and the limitation of the capacity of the original iron core is solved. The iron core with the square-shaped structure can be suitable for the actual installation environment to the maximum extent, can be horizontally installed in a spacious environment, can also be vertically installed in a long and narrow environment, and can also be laterally installed in a flat environment, so that the universality is greatly increased.

As shown in fig. 4, the magnetic core 1 includes a plurality of silicon steel sheets stacked in layers, a mounting hole 20 for fastening is formed in each silicon steel sheet in a penetrating manner, the magnetic core 1 is fastened between the upper bracket and the lower bracket through a connecting mechanism, and an upper insulating clamping plate 6 and a lower insulating clamping plate 7 are respectively arranged between the magnetic core 1 and the upper bracket and between the magnetic core 1 and the lower bracket, so that the insulating property of the magnetic core is ensured.

All be provided with the insulating cover 10 of T type in the magnetic core 1 mounting hole 20 corresponding to coupling mechanism, coupling mechanism includes screw rod 8 and nut 11, screw rod 8 wears to establish in proper order through after lower carriage 5, lower insulating splint, mounting hole, insulating cover 10, the last insulating splint, the upper bracket with nut 11 is connected. The flat pad 9 is arranged between the lower insulating plate and the insulating sleeve, the insulating property of the bolt and the magnetic core is improved through the insulating sleeve 10, and the insulating plate and the T-shaped insulating sleeve are arranged at the upper end and the lower end of the magnetic core, so that the magnetic core is integrally insulated, the magnetic core can be suitable for high-voltage application occasions, and the local short circuit of the magnetic core is avoided. The upper and lower support frames are made of cold rolled steel, and the upper and lower insulating splints are made of epoxy plates.

Still be provided with terminal backup pad 12 on the screw rod 8 to lock fixedly through nut two 23, terminal backup pad 12 interval is in the setting of upper bracket 4, guarantees the ann rule distance, terminal platform 13 sets up on terminal backup pad 12, contains a plurality of direction copper bars on the terminal platform 13 for the lead-out wire end of connecting coil winding to and access circuit.

As shown in fig. 2, a grounding copper foil 17 is disposed between one of the iron yoke portions of the magnetic core 1 and the lower bracket 5, and the grounding copper foil 17 is in close contact with the iron yoke portion and the lower bracket 5, respectively. The grounding copper foil 17 is of a U-shaped folding structure, two arms of the grounding copper foil 17 are attached to two sides of the lower insulating clamp plate 7, and the grounding copper foil 17 is clamped by the magnetic core, the lower insulating clamp plate and the lower support. The iron core and the support are reliably connected through the single-point grounding copper foil, and the harm of multipoint grounding is effectively avoided.

The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. A transformer with high-low voltage general structure is characterized in that: including magnetic core (1), primary (2), secondary (3) and skeleton, magnetic core (1) is the annular structure, just magnetic core (1) contains the iron core post that two symmetries set up, two the cover is equipped with the skeleton respectively on the iron core post, two wind respectively on the skeleton and be equipped with primary (2), secondary (3), interval setting and constitution heat dissipation air flue between primary (2) and secondary (3), the axial both ends of skeleton include end plate (21) respectively, interval setting between the end plate of primary, secondary and the skeleton that corresponds, the both sides of the indisputable yoke portion of magnetic core (1) are provided with upper bracket (4), lower carriage (5) respectively, be provided with wiring terminal platform (13) on upper bracket (4).

2. A transformer having a high-low voltage common structure according to claim 1, wherein: the magnetic core (1) comprises a plurality of silicon steel sheets which are stacked, mounting holes (20) for fastening are formed in the silicon steel sheets in a penetrating mode, the magnetic core (1) is fastened between the upper support and the lower support through a connecting mechanism, and an upper insulating clamping plate (6) and a lower insulating clamping plate (7) are arranged between the magnetic core (1) and the upper support and between the magnetic core and the lower support respectively.

3. The transformer with high-low voltage general structure as claimed in claim 2, wherein: t-shaped insulating sleeves (10) are arranged in the magnetic cores (1) corresponding to the mounting holes (20) of the connecting mechanisms.

4. A transformer having a high-low voltage common structure according to claim 3, wherein: the connecting mechanism comprises a screw rod (8) and a first nut (11), wherein the screw rod (8) is connected with the first nut (11) in a penetrating mode through a lower support (5), a lower insulating clamping plate, a mounting hole, an insulating sleeve (10), an upper insulating clamping plate and an upper support.

5. The transformer of claim 4, wherein the transformer has a high-low voltage common structure, and the transformer comprises: still be provided with terminal fagging (12) on screw rod (8), terminal fagging (12) interval sets up in upper bracket (4), terminal platform (13) set up on terminal fagging (12).

6. A transformer having a high-low voltage common structure according to claim 2, wherein: a grounding copper foil (17) is arranged between one iron yoke of the magnetic core (1) and the lower support (5), and the grounding copper foil (17) is respectively in close contact with the iron yoke and the lower support (5).

7. The transformer of claim 6, wherein the transformer has a high-low voltage common structure, and the transformer further comprises: the grounding copper foil (17) is of a U-shaped folding structure, two arms of the grounding copper foil (17) are attached to two sides of the lower insulating clamp plate (7), and the grounding copper foil (17) is clamped by the magnetic core, the lower insulating clamp plate and the lower support together.

8. The transformer with high-low voltage general structure as claimed in claim 1, wherein: the framework is of a sleeve type structure, and a plurality of radiating grooves (22) are formed in the end plates (21).