CN207397920U - An inductance for high-power AC charging pile - Google Patents

Abstract

The utility model discloses an inductor for a high-power AC charging pile; the magnetic core is axially arranged in parallel to the width direction of the shell, two axially parallel coils are respectively wound on two opposite sides of the magnetic core and are connected in series, a partition plate is arranged between the two coils of the shell, an isolation layer is arranged on the inner wall of the shell, and insulating colloid is filled between the coils and the isolation layer; the outer wall of the magnetic core is provided with two circles of steel belts for fixing the magnetic core. The utility model discloses a magnetic core is fixed to two circles of steel bands that set up in the magnetic core outside, improves the stability of magnetic core during operation, further improves the insulating properties of inductance through baffle, isolation layer, the insulating colloid between two coils, improves the security.

Description

An inductance for high-power AC charging pile

technical field

The utility model relates to the field of inductors, in particular to an inductor used for high-power AC charging piles.

Background technique

In the prior art, the skeleton and the magnetic core of the inductor are designed according to the industry standard. The volume of the existing circuit equipment is getting smaller and smaller, and the working power is getting bigger and bigger, so the inductor needs to be further developed. Reduce the size and increase the working voltage. Inductors are used in high-power working environments, especially in high-power AC charging piles. The temperature of the working environment is high and the power is high, which is easy to cause the magnetic core of the inductor to expand. , to break the coil wound on the magnetic core, and at the same time, it is easy to discharge the coil, which affects the service life of the inductor. This requires further optimizing the structure of the inductor and improving the insulation performance of the inductor to meet the needs.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art and provide an inductor for a high-power AC charging pile.

In order to achieve the above purpose, the utility model adopts the following technical scheme: an inductor for high-power AC charging pile; including a rectangular parallelepiped metal shell, a square magnetic core arranged in the shell, the axial direction of the magnetic core The width direction of the parallel casing is arranged, two opposite sides of the magnetic core are respectively wound with two axially parallel coils, the two coils are connected in series, and the casing is provided with a separator between the two coils, The inner wall of the housing is provided with a layer of isolation layer, and the space between the coil and the isolation layer is filled with insulating colloid; the outer wall of the magnetic core is provided with two turns of steel belts for fixing the magnetic core.

To further elaborate on the scheme, the magnetic core is composed of two oppositely arranged C-shaped iron cores, an air gap plate is arranged between the two C-shaped iron cores, the coil is located outside the air gap plate, and the separator is inserted Set between two C-shaped iron cores.

To further elaborate on the scheme, the housing is a housing with an open upper end, and the side wall of the housing connected with the partition is provided with two partition fixing columns fixedly connected with the partition, and the bottom of the housing is upward Four supporting columns for fixing the magnetic core are arranged, and the four supporting columns are distributed in four corners and arranged under the magnetic core.

To further elaborate the scheme, an inner insulating layer made of Noemi paper is arranged between the coil and the magnetic core, and an outer insulating layer made of Teflon high-temperature tape is arranged on the outermost layer of the coil.

To further elaborate on the scheme, the isolation layer is insulating kraft paper, and the insulating kraft paper is pasted on the inner walls and bottom of the four sides of the casing.

To further elaborate the scheme, the insulating colloid is composed of epoxy resin poured into the shell.

To further elaborate on the solution, the two coils are both wound by enameled wires, and two lead wires are respectively extended from the two coils, and the lead wires are PVC electronic wires.

The beneficial effect of the utility model is that: the magnetic core is fixed by two rings of steel belts arranged outside the magnetic core, and the stability of the magnetic core is improved; The insulation performance of the inductor improves the safety; the stability of the magnetic core and the coil in the shell is improved through the partition fixing column and the supporting column, and the stability of the structure is further improved after the poured insulating colloid is solidified.

Description of drawings

Fig. 1 is a structural schematic diagram of the section A-A' in Fig. 3 .

Fig. 2 is a schematic structural view of the section B-B' in Fig. 3 .

Fig. 3 is a structural schematic diagram of the utility model viewed from above.

Explanation of reference numerals: 1. Shell; 11. Isolation layer; 12. Insulating colloid; 2. Magnetic core; 21. Steel strip; 22. Air gap plate; 31. First coil; 32. First lead wire; 33. The second coil; 34, the second lead wire; 41, the inner insulation layer; 42, the outer insulation layer; 5, the partition; 61, the partition fixing column; 62, the support column.

Detailed ways

A specific embodiment of the present utility model is introduced below in conjunction with accompanying drawing 1 to accompanying drawing 3.

As shown in Figure 1-3, an inductor for high-power AC charging piles; it includes a rectangular parallelepiped metal shell 1, a square magnetic core 2 set in the shell 1, and the axial direction of the magnetic core 2 is parallel to the shell 1 is set in the width direction, the two opposite sides of the magnetic core 2 are respectively wound with a first coil 31 and a second coil 33 parallel to the axial direction, the first coil 31 and the second coil 33 are connected in series through a connecting wire, and the shell 1 A partition 5 is arranged between the coils, a layer of isolation layer 11 is arranged on the inner wall of the housing 1, and an insulating colloid 12 is filled between the coil and the isolation layer 11; the outer wall of the magnetic core 2 is provided with two turns of a steel belt 21 for fixing the magnetic core 2 , improve the stability of the magnetic core when it is working, and prevent the magnetic core from expanding and breaking the coil. Both ends of the connecting wire are welded to the first coil 31 and the second coil 33 respectively, the connecting wire is an enameled wire, and the connecting wire is covered with an insulating tape or covered with an insulating sleeve.

The magnetic core 2 is composed of two oppositely arranged C-shaped iron cores. An air gap plate 22 is arranged between the two C-shaped iron cores. The coil is located outside the air-gap plate 22. The separator 5 is inserted between the two C-shaped iron cores. Between, the air gap plate 22 is a glass fiber plate. The separator 5 is an epoxy insulating board, and the epoxy insulating board is made of glass fiber cloth bonded with epoxy resin and heated and pressurized.

The shell 1 is an aluminum alloy shell 1, the shell 1 is a shell 1 with an open upper end, and the side wall of the shell 1 connected with the partition 5 is provided with two partition fixing columns 61 fixedly connected with the partition 5 , the bottom of the casing 1 is provided with four supporting columns 62 for fixing the magnetic core 2 upwards, and the four supporting columns 62 are arranged at the bottom of the magnetic core 2 in a four-corner distribution. The supporting column 62 and the partition fixing column 61 are all fixed screws. Because of the factor of the air gap plate 22 of the magnetic core 2, the manufacturing accuracy of the magnetic core 2 is relatively poor. The four supporting columns 62 adopt the fixing screws to be able to Adjust the depth and level of the magnetic core 2 in the housing 1 to adjust the position and posture of the magnetic core 2 in the housing 1 to improve product quality. The internal magnetic core 2 transfers the emitted heat to the metal casing 1 through the support column 62, which improves the heat dissipation effect; the upper part of the magnetic core 2 is exposed outside the casing 1 to dissipate the heat.

An inner insulating layer 41 made of Nomex paper is arranged between the coil and the magnetic core 2 , and an outer insulating layer 42 made of Teflon high-temperature tape is arranged on the outermost layer of the coil. The isolation layer 11 is insulating kraft paper with a thickness of 0.5mm, and the insulating kraft paper is pasted on the four inner walls and the bottom of the housing 1 .

The insulating glue 12 is composed of epoxy resin poured into the casing 1 . The first coil 31 and the second coil 33 are all wound by enameled wire, the first coil 31 and the second coil 33 respectively extend the first lead wire 32 and the second lead wire 34, and the first lead wire 32 and the second lead wire 34 are all PVC electronic wires. The PVC electronic wire jacket is provided with a heat-shrinkable sleeve, and the first coil 31 is wound with half a turn more than the second coil 33. The first coil 31 has 54.5 turns, and the second coil 33 has 54 turns.

The above description does not limit the technical scope of the present utility model in any way. All modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present utility model still belong to the scope of the technical solution of the present utility model.

Claims (7)

1. An inductance for a high-power AC charging pile; it is characterized in that: it comprises a rectangular parallelepiped metal shell, a square magnetic core arranged in the shell, the axial direction of the magnetic core is set parallel to the width direction of the shell, The two opposite sides of the magnetic core are respectively wound with two axially parallel coils, the two coils are connected in series, the housing is provided with a partition between the two coils, and the inner wall of the housing is provided with a layer The isolation layer is filled with insulating colloid between the coil and the isolation layer; the outer wall of the magnetic core is provided with two turns of steel strips for fixing the magnetic core. 2. An inductor for high-power AC charging piles according to claim 1, characterized in that: the magnetic core is composed of two oppositely arranged C-shaped iron cores, and one of the two C-shaped iron cores is An air gap plate is arranged between them, the coil is located outside the air gap plate, and the partition plate is inserted between two C-shaped iron cores. 3. An inductor for high-power AC charging piles according to claim 2, characterized in that: the casing is a casing with an open upper end, and the casing is provided on the side wall connected to the partition There are two partition fixing columns fixedly connected with the partition, and four support columns for fixing the magnetic core are provided upwardly at the bottom of the housing, and the four support columns are arranged at four corners under the magnetic core. 4. An inductor for high-power AC charging piles according to claim 2, characterized in that: an inner insulating layer made of Noemi paper is arranged between the coil and the magnetic core, and the outermost layer of the coil is The layer is provided with an outer insulating layer consisting of Teflon high temperature tape. 5. An inductor for high-power AC charging piles according to claim 1, characterized in that: the isolation layer is insulating kraft paper, and the insulating kraft paper is pasted on the inner walls and bottom of the casing. 6. The inductor for high-power AC charging piles according to claim 1, characterized in that: the insulating colloid is composed of epoxy resin poured into the casing. 7. An inductor for high-power AC charging piles according to claim 1, characterized in that: the two coils are both wound by enameled wires, and two lead wires are extended from the two coils respectively, the The leads are PVC electronic wires.