CN215186440U

CN215186440U - Converter LCL circuit structure

Info

Publication number: CN215186440U
Application number: CN202121692576.0U
Authority: CN
Inventors: 张春翌; 夏中元
Original assignee: Shanghai Zhaoshuo Technology Co ltd
Current assignee: Ride Shanghai Electric Co ltd
Priority date: 2021-07-25
Filing date: 2021-07-25
Publication date: 2021-12-14
Anticipated expiration: 2031-07-25

Abstract

The utility model discloses a structure belonging to the technical field of current transformer, in particular to a structure of LCL circuit of current transformer, which comprises a relay board, an inductance board and a support board, wherein the top of the support board is provided with the inductance board, the top of the inductance board is provided with the relay board, the bottom of the inductance board is fixedly provided with a power inductance, the relay board is fixedly connected with the inductance board through screws, the inductance board is fixedly connected with the support board through screws, the power inductance at the bottom of the inductance board is positioned at the hollow position at the top of the support board, the direction of the power inductance is downward, the surface of the relay board is provided with an electric connection hole, the inductance board of the utility model is provided with a cold pressing terminal corresponding to the connection position, the two boards are jointed through the screw connection effect to complete the electric connection, and simultaneously realize the mechanical connection, and devices such as capacitance, soft-start resistance and relay are separated from the LCL circuit, the area of the circuit board is effectively reduced, the power density of the equipment is improved, and the cost of the equipment is reduced.

Description

Converter LCL circuit structure

Technical Field

The utility model relates to a converter technical field specifically is a structure of converter LCL circuit.

Background

With the development of electric power in recent years, the development of electric energy quality also enters a new height. In order to overcome the defects of the traditional filter and reduce the current harmonic wave, an LCL filter circuit is connected to the alternating current side during circuit design, compared with independent inductive filtering, the inductance value is not required to be too high during harmonic wave suppression, and meanwhile, the performance of harmonic wave suppression is stronger when the switching frequency is very high.

The LCL circuit of the existing converter is usually installed at the bottom of a case in an inductance separation mode, and then is electrically connected with an upper device through a guide rod; the length of the flow guide rod is long, the requirement on the machining precision of the flow guide rod is strict, uneven welding pads are prone to occurring, the installation process is complicated, the reliability is low, the manufacturing cost of the same flow guide rod is very high, and therefore the structure of the LCL circuit of the converter is provided.

SUMMERY OF THE UTILITY MODEL

The present invention has been made in view of the above and/or other problems occurring in the structure of the conventional LCL circuit of the converter.

Therefore, the utility model aims at providing a structure of converter LCL circuit can solve the above-mentioned current uneven pad that appears easily that proposes, and the installation is more loaded down with trivial details, and the reliability is lower, the very high problem of cost of manufacture of water conservancy diversion stick.

For solving the technical problem, according to the utility model discloses an aspect, the utility model provides a following technical scheme:

a structure of a converter LCL circuit, comprising: relay board, inductance board and backup pad, the backup pad top is equipped with the inductance board, the inductance board top is equipped with the relay board, inductance board bottom fixed mounting power inductance, the relay board with through screw fixed connection between the inductance board, through screw fixed connection between inductance board and the backup pad, inductance board bottom power inductance is located backup pad top fretwork position, the power inductance direction is down, the relay board surface sets up the electricity and connects the via hole, the inductance board top is fixed mounting alternating current side phase line input cold pressing terminal and the terminal of alternating current side N line input cold pressing respectively, it is inboard that the terminal of alternating current side phase line input cold pressing is located alternating current side N line input cold pressing terminal.

As a preferred scheme of structure of converter LCL circuit, wherein: the back of the inductance plate is fixedly provided with a low-power inductor and a high-power inductor respectively, the high-power inductor is positioned on the right side of the low-power inductor, the low-power inductor and the high-power inductor are uniformly distributed, and the low-power inductor and the high-power inductor penetrate through the supporting plate and are positioned at the hollow position of the top of the supporting plate.

As a preferred scheme of structure of converter LCL circuit, wherein: exchange side phase line input terminal of colding pressing and exchange side N line input terminal of colding pressing through welding and inductance board top fixed connection, inductance board top welded connection inductance board fuse group and external output terminal of colding pressing, inductance board fuse group and external output terminal electric connection of colding pressing.

As a preferred scheme of structure of converter LCL circuit, wherein: the top of the relay board is fixedly connected with a relay board input pad, a relay board output pad, a relay board N line output pad, a relay board soft start resistor, a relay, a Hall current transformer and a capacitor through welding, and the relay board input pad is electrically connected with the relay board N line output pad.

As a preferred scheme of structure of converter LCL circuit, wherein: the relay board input bonding pad is electrically connected with the Hall current transformer, the relay and the relay board output bonding pad in sequence.

As a preferred scheme of structure of converter LCL circuit, wherein: the soft-start resistor is connected to the top of the supporting plate in a welded mode, the capacitor is connected to the top of the supporting plate in a welded mode, and the capacitor and the soft-start resistor are located at the front end and the rear end of the supporting plate.

As a preferred scheme of structure of converter LCL circuit, wherein: one end of the relay board input pad is electrically connected with the capacitor and the end part of the soft starting resistor, and one end of the relay board input pad, which is far away from the capacitor, is electrically connected with the N line output pad of the relay board.

Compared with the prior art: the utility model provides a structural style of converter LCL main circuit, through the upper and lower integrated design of relay board and inductance board, be provided with the electricity at relay board position and connect the via hole, the inductance board corresponds hookup location and is provided with the terminal of colding pressing, it connects to make laminating completion electricity between the two boards through the screw connection effect, realize mechanical connection simultaneously, this kind of structural style, with electric capacity, soft resistance and relay of playing, separate out from the LCL circuit, effectively reduce the area of circuit board, improve equipment power density, reduce equipment cost, the same sets up the equipment top with the relay board, it is convenient to maintain equipment.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic diagram of the LCL circuit connection structure of the present invention;

fig. 3 is an auxiliary schematic view of the LCL circuit connection structure of the present invention.

In the figure, a relay board 10, an inductance board 20, a support plate 5, a low-power inductance 202, a high-power inductance 201, an alternating-current side phase line input cold-pressing terminal 210, an alternating-current side N line input cold-pressing terminal 310, a relay board input pad 110, a relay board output pad 120, a relay board N line output pad 320, an inductance board fuse set 203, an external output cold-pressing terminal 220, an inductance board low-power inductance input cold-pressing terminal 321, a relay board soft-start resistor 101, a relay 102, a Hall current transformer 103 and a capacitor 104.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

The utility model provides a structure of converter LCL circuit, which has the advantages of reducing the area of the circuit board, improving the power density of the equipment and reducing the cost of the equipment, please refer to FIGS. 1-3, comprising a relay board 10, an inductance board 20 and a support board 5, the top of the support board 5 is provided with the inductance board 20, the top of the inductance board 20 is provided with the relay board 10, the bottom of the inductance board 20 is fixedly provided with a power inductor, the relay board 10 is fixedly connected with the inductance board 20 through screws, the inductance board 20 is fixedly connected with the support board 5 through screws, the power inductor at the bottom of the inductance board 20 is positioned at the hollow position at the top of the support board 5, the direction of the power inductor is downward, the surface of the relay board 10 is provided with an electric connecting hole, the top of the inductance board 20 is respectively and fixedly provided with an AC side phase line input cold-pressing terminal 210 and an AC side N line input cold-pressing terminal 310, the AC side phase line input cold pressing terminal 210 is positioned at the inner side of the AC side N line input cold pressing terminal 310, the back of the inductance plate 20 is fixedly provided with a small power inductance 202 and a large power inductance 201 respectively, the large power inductance 201 is positioned at the right side of the small power inductance 202, the small power inductance 202 and the large power inductance 201 are uniformly distributed, the small power inductance 202 and the large power inductance 201 penetrate through the support plate 5 and are positioned at the hollow part at the top of the support plate 5, concretely, the relay plate 10, the inductance plate 20 and the support plate 5 are matched for use, the relay plate has the function of conveniently installing related electronic devices, the support plate 5 is made of metal plate materials, the support plate 5 is made into a hollow shape and has the function of conveniently dissipating heat, the support plate 5 has the fixing function on the inductance plate 20, the small power inductance 202 and the large power inductance 201 on the surface of the inductance plate 20 pass through the hollow part of the support plate 5, the small power inductance 202 and the large power inductance 201 on the surface of the inductance plate 20 face downwards, the heat dissipation in an air duct at the lower part of the support plate 5 is facilitated, and the heat dissipation performance is improved, the working stability of the equipment is improved;

further, the AC side phase line input cold-pressed terminal 210 and the AC side N line input cold-pressed terminal 310 are fixedly connected with the top of the inductance board 20 by welding, the top of the inductance board 20 is welded with the inductance board fuse set 203 and the external output cold-pressed terminal 220, the inductance board fuse set 203 is electrically connected with the external output cold-pressed terminal 220, the top of the relay board 10 is fixedly connected with the relay board input pad 110, the relay board output pad 120, the relay board N line output pad 320, the relay board soft-start resistor 101, the relay 102, the Hall current transformer 103 and the capacitor 104 by welding, the relay board input pad 110 is electrically connected with the relay board N line output pad 320, the relay board input pad 110 is electrically connected with the Hall current transformer 103, the relay 102 and the relay board output pad 120 in turn, the top of the support plate 5 is welded with the soft-start resistor 101, and the top of the support plate 5 is welded with the capacitor 104, the capacitor 104 and the soft starting resistor 101 are positioned at the front end and the rear end of the supporting plate 5, one end of the relay board input pad 110 is electrically connected with the end parts of the capacitor 104 and the soft starting resistor 101, one end of the relay board input pad 110, which is far away from the capacitor 104, is electrically connected with the relay board N line output pad 320, particularly, the cold-pressed terminal is an electronic connector, air connectors are respectively belonged to the cold-pressed terminal and are accessory products for realizing electrical connection, the inductance board fuse set 203 is set to be JZYW-10, when the current exceeds a specified value, the inductance board fuse set 203 fuses a melt by heat generated by itself, a circuit is disconnected, the relay 102 is set to be JRC-5M-RG4, the relay 102 is an electric control device, when the change of the input quantity reaches the specified requirement, the controlled quantity is enabled to generate a preset step change in an electric output circuit, the Hall current transformer 103 is set to be HNC-25SY, and the Hall current transformer 103 has the function of current mutual inductance;

when the power inductor is used specifically, a circuit is connected with an alternating-current side phase line input cold-pressing terminal 210 and an alternating-current side N line input cold-pressing terminal 310 through welding in a mode that the relay board input bonding pad 110, the relay board output bonding pad 120 and the alternating-current side phase line input cold-pressing terminal are connected, so that the electrical connection on the circuit is realized, the mechanical connection between the two is also realized, the area of an LCL circuit is reduced, the power density of equipment is improved, meanwhile, a mode of designing through a flow guide rod is omitted, the heat dissipation of the power inductor in a closed air duct is possible, the reliability of equipment connection is improved equally, the complexity of an assembly process in the production process is reduced equally, and the production efficiency is improved.

While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, the various features of the disclosed embodiments of the present invention can be used in any combination with each other, and the non-exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. A structure of a converter LCL circuit is characterized in that: comprises a relay board (10), an inductance board (20) and a support board (5), the inductance board (20) is arranged on the top of the support board (5), the top of the inductance board (20) is provided with a relay board (10), the bottom of the inductance board (20) is fixedly provided with a power inductor, the relay board (10) and the inductance board (20) are fixedly connected through screws, the inductance plate (20) is fixedly connected with the support plate (5) through screws, the power inductor at the bottom of the inductance plate (20) is positioned at the hollow position at the top of the support plate (5), the power inductor faces downwards, the surface of the relay board (10) is provided with an electric connection through hole, the top of the inductance plate (20) is respectively fixedly provided with an AC side phase line input cold-pressing terminal (210) and an AC side N line input cold-pressing terminal (310), the alternating current side phase line input cold-pressing terminal (210) is located on the inner side of the alternating current side N line input cold-pressing terminal (310).

2. The LCL circuit structure of a current transformer as claimed in claim 1, wherein a low power inductor (202) and a high power inductor (201) are respectively and fixedly mounted on the back of said inductance board (20), said high power inductor (201) is located on the right side of said low power inductor (202), said low power inductor (202) and said high power inductor (201) are uniformly distributed, and said low power inductor (202) and said high power inductor (201) pass through a support board (5) and are located in a hollow-out position on the top of said support board (5).

3. The structure of a converter LCL circuit according to claim 1, wherein said AC side phase line input cold-pressed terminal (210) and AC side N line input cold-pressed terminal (310) are fixedly connected with the top of the inductance plate (20) by welding, said top of the inductance plate (20) is welded with the inductance plate fuse set (203) and the external output cold-pressed terminal (220), and said inductance plate fuse set (203) and the external output cold-pressed terminal (220) are electrically connected.

4. The structure of a converter LCL circuit as claimed in claim 1, wherein said relay board (10) top is fixedly connected with relay board input pad (110), relay board output pad (120), relay board N line output pad (320), relay board soft start resistor (101), relay (102), Hall current transformer (103) and capacitor (104) by welding, said relay board input pad (110) is electrically connected with relay board N line output pad (320).

5. The structure of a converter LCL circuit according to claim 4, wherein said relay board input pad (110) is electrically connected to the Hall current transformer (103), the relay (102) and the relay board output pad (120) in sequence.

6. The LCL circuit structure of current transformer as claimed in claim 5, wherein said support plate (5) is welded on top with soft-start resistor (101), said support plate (5) is welded on top with capacitor (104), said capacitor (104) and soft-start resistor (101) are located at the front and back ends of support plate (5).

7. The structure of the LCL circuit of the converter as claimed in claim 6, wherein one end of the input pad (110) of the relay board is electrically connected to the capacitor (104) and the end of the soft start resistor (101), and one end of the input pad (110) of the relay board away from the capacitor (104) is electrically connected to the output pad (320) of the N line of the relay board.