CN215644046U - High-voltage high-frequency transformer for electric vehicle charging pile distribution transformer system - Google Patents
High-voltage high-frequency transformer for electric vehicle charging pile distribution transformer system Download PDFInfo
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- CN215644046U CN215644046U CN202121333468.4U CN202121333468U CN215644046U CN 215644046 U CN215644046 U CN 215644046U CN 202121333468 U CN202121333468 U CN 202121333468U CN 215644046 U CN215644046 U CN 215644046U
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Abstract
The utility model relates to distribution transformer equipment, in particular to a high-voltage high-frequency transformer for an electric vehicle charging pile distribution transformer system. The winding structure comprises a primary winding, a secondary winding, an iron core and an insulating framework, wherein the primary winding and the secondary winding are wound on the insulating framework and are cast into a whole by adopting epoxy resin to form a main insulator; a primary insulating column and a secondary wiring terminal are arranged on the side part of the main insulator, and a primary high-voltage terminal is arranged at the end part of the primary insulating column; the main insulator is sleeved on the iron core. The utility model has the advantages of simple structure, convenient installation, high frequency, high capacity and low loss.
Description
Technical Field
The utility model relates to distribution transformer equipment, in particular to a high-voltage high-frequency transformer for an electric vehicle charging pile distribution transformer system.
Background
The transformer is an important part in an electric vehicle charging pile distribution transformer system, and a traditional distribution transformer generally needs more equipment devices to transmit information by converting a low-voltage control device. With the development of electrical modernization, an electric vehicle charging pile distribution transformer system matched with a transformer is used as a supplementary unit and is the best equipment for electric energy distribution and control; the traditional distribution transformer has the defects of more equipment, large loss and the like due to the defects of low frequency, small capacity and the like. In order to realize the functional characteristics of small loss, flexible installation and the like of the distribution transformer, a high-voltage high-frequency transformer with high frequency and large capacity is urgently needed.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, an object of the present invention is to provide a high-voltage and high-frequency transformer for an electric vehicle charging pile distribution transformer system, so as to change the current situations of low frequency, small capacity and large loss of the existing transformer.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a high-voltage high-frequency transformer for an electric vehicle charging pile distribution transformer system comprises a primary winding, a secondary winding, an iron core and an insulation framework, wherein the primary winding and the secondary winding are wound on the insulation framework and are cast into a whole by adopting epoxy resin to form a main insulator; a primary insulating column and a secondary wiring terminal are arranged on the side part of the main insulator, and a primary high-voltage terminal is arranged at the end part of the primary insulating column; the main insulator is sleeved on the iron core.
The insulating framework is of a double-cylinder structure, and three winding grooves are formed in the double cylinders along the axial direction; the primary winding is wound in the winding groove in the middle, the secondary winding is wound in the winding grooves on two sides, two groups of secondary wiring terminals are arranged corresponding to the two groups of secondary windings, and output terminals in the two groups of secondary wiring terminals are connected through connecting pieces to form secondary wire outlet ends.
The primary winding and the secondary winding are both of a magnet wire and wound on the double cylinders of the insulating framework in an 8 shape.
The insulating framework is of an integrated structure formed by pouring epoxy resin, and semi-conductive paint is sprayed on the outer surface of the insulating framework.
The end part of the primary insulating column is provided with a high-voltage shielding terminal, and two low-voltage shielding terminals are arranged close to the two groups of secondary wiring terminals;
and the three winding grooves of the insulation framework are respectively connected with the high-voltage shielding terminal and the two low-voltage shielding terminals through three shielding wires.
The high-voltage shielding terminal and the primary high-voltage terminal are separated by three rib plates which are uniformly distributed in a transmission shape.
The iron core comprises two magnetic cores and two magnetic columns, wherein the two magnetic cores are arranged in parallel, and two ends of the two magnetic cores are connected through the two magnetic columns; the insulating framework is sleeved on the two magnetic cores.
Umbrella skirts are arranged on the outer surface of the primary insulating column at equal intervals along the axial direction.
The outer surface of the main insulator is sprayed with semi-conducting paint, the top and the bottom of the main insulator are provided with supporting legs, and two sides of the main insulator are symmetrically provided with equidistant grooves.
The high-voltage high-frequency transformers are arranged in parallel, primary high-voltage terminals of the high-voltage high-frequency transformers are connected in series, and secondary wiring terminals are connected with the high-voltage rectifier respectively and then connected with output voltage in parallel.
The utility model has the following advantages and beneficial effects:
1. simple structure, simple to operate: the primary winding and the secondary winding are wound on an insulating framework, the iron core is sleeved after vacuum casting and curing molding, and the upper side and the lower side of the iron core are fixedly installed by installing the inserts.
2. Large frequency, large capacity, small loss: the primary winding and the secondary winding of the utility model adopt the magnetic line, the iron core adopts the ferrite magnetic core, a plurality of high-voltage high-frequency transformers are arranged in parallel, the primary winding is connected in series and wired, and the secondary winding is connected with the wire, thus realizing the functional characteristics of high frequency, large capacity, small loss and the like.
Drawings
FIG. 1 is a schematic structural diagram of a high-voltage high-frequency transformer for an electric vehicle charging pile distribution transformer system according to the present invention;
FIG. 2 is a front view of a high voltage, high frequency transformer for an electric vehicle charging post distribution transformer system of the present invention;
FIG. 3 is a left side view of FIG. 2;
fig. 4 is a top view of fig. 2.
In the figure: the transformer comprises a primary winding 1, a secondary winding 2, an iron core 3, a magnetic core 31, a magnetic column 32, an insulating framework 4, a shielding wire 5, a primary insulating column 6, a primary high-voltage terminal 7, a low-voltage shielding terminal 8, a high-voltage shielding terminal 9, a supporting leg 10, a rib plate 11, a connecting sheet 12, a secondary wiring terminal 13, a main insulator 14 and a groove 15.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-4, the high-voltage high-frequency transformer for the electric vehicle charging pile distribution transformer system provided by the utility model comprises a primary winding 1, a secondary winding 2, an iron core 3 and an insulating framework 4, wherein the primary winding 1 and the secondary winding 2 are wound on the insulating framework 4 and are cast into a whole by epoxy resin to form a main insulator 14; a primary insulating column 6 and a secondary wiring terminal 13 are arranged on the side part of the main insulator 14, and a primary high-voltage terminal 7 is arranged at the end part of the primary insulating column 6; the main insulator 14 is fitted over the iron core 3.
As shown in fig. 1, in the embodiment of the present invention, the insulating frame 4 is a double-cylinder structure, and three winding grooves are formed on the double cylinders along the axial direction; the primary winding 1 is wound in the winding groove in the middle, the two groups of secondary windings 2 are wound in the winding grooves on the two sides respectively, and two groups of secondary wiring terminals 13 are arranged corresponding to the two groups of secondary windings 2. As shown in fig. 3, the output terminals of the two sets of secondary connection terminals 13 are connected by a connection piece 12 to form a secondary outlet terminal.
In the embodiment of the utility model, the insulating framework 4 is an integral structure formed by casting epoxy resin, and semi-conductive paint is uniformly sprayed on the outer surface. The primary winding 1 and the secondary winding 2 are both of a magnet wire and wound on the double cylinders of the insulating framework 4 in an 8 shape. The iron core 3 comprises two magnetic cores 31 and two magnetic columns 32, wherein the two magnetic cores 31 are arranged in parallel, the two ends of the two magnetic cores are connected through the two magnetic columns 32, and the insulating framework 4 is sleeved on the two magnetic cores 31.
In the embodiment of the utility model, arc-shaped umbrella skirts are arranged on the outer surface of a primary insulating column 6 at equal intervals along the axial direction, a high-voltage shielding terminal 9 is arranged at the end part of the primary insulating column 6, and two low-voltage shielding terminals 8 are arranged close to two groups of secondary wiring terminals 13; three shielding wires 5 are led out from three winding grooves of the insulating framework 4 respectively, and the three shielding wires 5 are connected with the corresponding high-voltage shielding terminal 9 and the two low-voltage shielding terminals 8 respectively.
Further, as shown in fig. 3, two terminals of the high-voltage shielding terminal 9 and the primary high-voltage terminal 7 at the end of the primary insulating column 6 are respectively separated by three rib plates 11 which are uniformly distributed in a radial shape.
In the embodiment of the utility model, the main insulator 14 is an integral structure formed by pouring epoxy resin, four support legs 10 are arranged at the top and the bottom of the main insulator, and the four support legs 10 are square and are positioned on four corner edges of the main insulator 14. The main insulator 14 is symmetrically provided with equally spaced grooves 15 on both sides. When the transformer is installed, a plurality of high-voltage high-frequency transformers are arranged in parallel, primary high-voltage terminals 7 of the high-voltage high-frequency transformers are connected in series, and secondary wiring terminals 13 are connected with the high-voltage rectifier respectively and then connected with output voltage in parallel.
In the embodiment of the present invention, the iron core 3 is a high performance ferrite iron core, the magnetic core 31 is in a cylindrical shape, a plurality of cylinders are stacked, the magnetic columns 32 at both ends are in a rectangular parallelepiped shape, and the magnetic core 31 and the magnetic columns 32 are compressed by a pressing plate.
The utility model provides a manufacturing process of a high-voltage high-frequency transformer for an electric vehicle charging pile distribution transformer system, which comprises the following steps:
the insulating framework 4 is formed by vacuum casting of epoxy resin, semi-conducting paint is sprayed on the outer surface of the insulating framework, the primary winding 1 and the secondary winding 2 are wound in three winding grooves of the insulating framework 4 in an 8-shaped mode after drying, the winding grooves at two ends are wound with the secondary winding 2, and the winding groove in the middle is wound with the primary winding 1. Leading out a shielding wire 5 from the upper, middle and lower winding grooves close to the insulation framework 4, wrapping the shielding wire by shielding insulation, fixing the wrapped shielding wire in a casting mold, and performing vacuum casting and curing by adopting epoxy resin to form a main insulator 14; finally, the outer surface of the main insulator 14 is sprayed with semi-conductive paint, and then the iron core 3 is mounted and fixed by a pressing plate. The primary high-voltage terminal 7 is positioned at the end part of the primary insulating column 6, so that smooth connection with a high-voltage bus is guaranteed, an enough air insulation distance and an enough surface creepage distance are guaranteed in the using process, and insulation is more reliable; the main insulation between the primary winding and the secondary winding is an insulation framework 4 formed by vacuum casting of epoxy resin, the insulation framework 4 is also used as an inner support of the high-frequency high-voltage transformer, and the iron core 3 is positioned; the main body of the main insulator 14 is in a shape that a plurality of square grooves 15 are formed in the outer part, the whole insulator is in a cuboid structure, the structural design is profiled and optimized, the periphery of the inner coil is ensured to have uniform and abundant insulation distance, and excessive dust and dirt cannot be accumulated for a long time in the application process; the arc-shaped umbrella skirt with equal intervals is arranged on the outer side of the primary insulating column 6, so that the surface creepage distance is effectively increased, and the surface creepage distance of a product to the ground under high voltage is ensured; the surface of the main insulator 14 is sprayed with semi-conductive paint, effectively shielding the ground low-voltage potential; two groups of secondary wiring terminals 13 are positioned on one side of the primary insulating column 6, and output terminals in the two groups of secondary wiring terminals 13 are connected through a connecting sheet 12 to form a secondary wire outlet end, so that reliable connection of secondary wiring is ensured; two sets of secondary binding post 13 department respectively is provided with a low pressure shielding terminal 8, and primary high-voltage terminal 7 department is provided with high-voltage shielding terminal 9 simultaneously, makes high-low pressure shielding effect more reliable.
The installation process of the utility model is as follows: a plurality of high-frequency high-voltage transformers are arranged side by side, and secondary wire outlet ends of secondary wiring terminals 13 of the high-frequency high-voltage transformers are respectively connected with a high-voltage rectifier, so that primary windings can be applied to and penetrate through all the high-frequency high-voltage transformers. In this embodiment, six high frequency high voltage transformers are placed in parallel, the primary high voltage terminals 7 are connected in series, i.e. the primary windings are divided into six groups of independent windings, each independent magnetic core 31 is connected with a high voltage rectifier, i.e. each secondary winding 2 is connected with a high voltage rectifier, then the output terminals of the six high voltage rectifiers are connected in parallel, and the sum of the generated voltages constitutes the total output voltage. In the present embodiment, the primary winding is divided into six groups of windings, and likewise, the secondary winding structure is divided into six groups of windings. Thus, for each set of primary windings, one set of secondary windings corresponds. Each group of independent secondary windings comprises a group of high-voltage rectifiers, all the high-voltage rectifiers are connected in parallel, and the final output voltage is the sum of parallel superposition, so that the functional characteristics of high frequency, large capacity, low loss and the like are realized, the highest frequency can reach 100kHz, and the maximum capacity can reach 50 kW. In contrast to the prior art, each secondary winding is now coupled to a corresponding primary winding by a separate magnetic core. The coupling and synchronization are improved, the influence of cross interference between the primary winding and the secondary winding is eliminated, and stray magnetic fields generated by the primary winding are effectively counteracted.
The utility model designs a new product completely according to the national standard and the industrial technology, adopts the magnetic line and the ferrite core, gets rid of the winding mode, the coil winding method and the installation structure of a single high-power core adopted by the conventional high-frequency high-voltage transformer, adopts the series-parallel connection superposition of a plurality of annular coil windings, can well control and reduce the leakage inductance, and realizes the functional characteristics of high frequency, large capacity, low loss and the like.
The utility model adopts the epoxy resin to form the rear sleeve iron core through vacuum pouring, and the product has the characteristics of high frequency, large capacity, small loss, beautiful appearance, flexible installation and the like, is completely suitable for the use of the charging pile distribution transformer system of the electric vehicle, and integrally improves the manufacturing level of the charging pile distribution equipment.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, extension, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.
Claims (10)
1. A high-voltage high-frequency transformer for an electric vehicle charging pile distribution transformer system is characterized by comprising a primary winding (1), a secondary winding (2), an iron core (3) and an insulating framework (4), wherein the primary winding (1) and the secondary winding (2) are wound on the insulating framework (4) and are cast into a whole by adopting epoxy resin to form a main insulator (14); a primary insulating column (6) and a secondary wiring terminal (13) are arranged on the side part of the main insulator (14), and a primary high-voltage terminal (7) is arranged at the end part of the primary insulating column (6); the main insulator (14) is sleeved on the iron core (3).
2. The high-voltage high-frequency transformer for the electric vehicle charging pile distribution transformer system as claimed in claim 1, wherein the insulating framework (4) is a double-cylinder structure, and three winding grooves are formed in each double cylinder along the axial direction; the winding groove in the middle is used for winding the primary winding (1), the winding grooves on two sides are used for winding the secondary winding (2), two groups of secondary wiring terminals (13) are arranged corresponding to the secondary winding (2), and output terminals in the two groups of secondary wiring terminals (13) are connected through connecting pieces (12) to form secondary wire outlet ends.
3. The high-voltage high-frequency transformer for the electric vehicle charging pile distribution transformer system as claimed in claim 2, wherein the primary winding (1) and the secondary winding (2) are both made of ferromagnetic wires and wound on the double cylinders of the insulating framework (4) in a 8-shaped manner.
4. The high-voltage high-frequency transformer for the electric vehicle charging pile distribution transformer system as claimed in claim 2, wherein the insulating framework (4) is a one-piece structure cast by epoxy resin, and the outer surface of the insulating framework is coated with semi-conductive paint.
5. The high-voltage high-frequency transformer for the electric vehicle charging pile distribution transformer system as claimed in claim 4, wherein the end of the primary insulating column (6) is provided with a high-voltage shielding terminal (9), and two low-voltage shielding terminals (8) are arranged near the two sets of secondary connecting terminals (13);
and the three winding grooves of the insulating framework (4) are respectively connected with the high-voltage shielding terminal (9) and the two low-voltage shielding terminals (8) through the three shielding wires (5).
6. The high-voltage high-frequency transformer for the electric vehicle charging pile distribution transformer system according to claim 5, wherein two terminals of the high-voltage shielding terminal (9) and the primary high-voltage terminal (7) are respectively separated by three rib plates (11) which are uniformly distributed in a launching shape.
7. The high-voltage high-frequency transformer for the electric vehicle charging pile distribution transformer system as claimed in claim 2, wherein the iron core (3) comprises two magnetic cores (31) and two magnetic columns (32), wherein the two magnetic cores (31) are arranged in parallel, and the two ends are connected through the two magnetic columns (32); the insulating framework (4) is sleeved on the two magnetic cores (31).
8. The high-voltage high-frequency transformer for the electric vehicle charging pile distribution transformer system as claimed in claim 1, wherein the outer surface of the primary insulating column (6) is provided with umbrella skirts at equal intervals along the axial direction.
9. The high-voltage high-frequency transformer for an electric vehicle charging post distribution transformer system according to claim 1, wherein the outer surface of the main insulator (14) is coated with a semi-conductive paint, the main insulator (14) is provided with legs (10) at the top and bottom, and the main insulator (14) is symmetrically provided with equally spaced grooves (15) at both sides.
10. The high-voltage high-frequency transformer for the electric vehicle charging pile distribution transformer system as claimed in any one of claims 1 to 9, wherein the high-voltage high-frequency transformer is provided in plurality and arranged side by side, the primary high-voltage terminals (7) of each high-voltage high-frequency transformer are connected in series, and the secondary connection terminals (13) are respectively connected with the high-voltage rectifier and then connected in parallel to output voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121333468.4U CN215644046U (en) | 2021-06-16 | 2021-06-16 | High-voltage high-frequency transformer for electric vehicle charging pile distribution transformer system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121333468.4U CN215644046U (en) | 2021-06-16 | 2021-06-16 | High-voltage high-frequency transformer for electric vehicle charging pile distribution transformer system |
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| Publication Number | Publication Date |
|---|---|
| CN215644046U true CN215644046U (en) | 2022-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121333468.4U Active CN215644046U (en) | 2021-06-16 | 2021-06-16 | High-voltage high-frequency transformer for electric vehicle charging pile distribution transformer system |
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| CN (1) | CN215644046U (en) |
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2021
- 2021-06-16 CN CN202121333468.4U patent/CN215644046U/en active Active
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