Bus structure for medium-frequency power supply cabinet

Abstract

The utility model relates to a bus structure used for an intermediate frequency power supply cabinet, comprising a bus duct and a three-way bus, the three-way bus is provided with 27 conducting bars and bus outgoing lines, the conducting bars are composed of A conducting bars, B conducting bars and C conducting bars, the A conducting bars, the B conducting bars and the C conducting bars respectively take one to form a conducting group, the conducting groups are arranged in a 3 * 3 mode, and the bus outgoing lines are connected with the bus duct. The arrangement mode of the conducting bars in the first row is sequentially an A conducting bar, a B conducting bar, a C conducting bar, a C conducting bar, an A conducting bar, a B conducting bar, a B conducting bar, a C conducting bar and an A conducting bar from left to right, and the arrangement mode of the conducting bars in the second row and the third row is the same as the arrangement mode of the conducting bars in the first row. And the line impedance is reduced.

Description

Technical Field

[0001] The utility model relates to a busbar structure used for a medium frequency power supply cabinet. Background Art

[0002] The medium frequency power supply cabinet is a device that converts low frequency AC power into medium frequency AC power, and is widely used in industrial smelting, welding, heat treatment, heating and other fields. However, in the existing medium frequency power supply cabinet system, cables are usually used to connect the power supply cabinet to the transformer. This method requires additional cable trays to be erected and cable branch joints to be made on site. The installation cycle is long and the manufacturing cost is high. In addition, within the medium frequency range (2kHz-4kHz), the use of cables will cause excessive heating, limiting the output power of the power supply cabinet.

[0003] The medium frequency power cabinet and transformer are connected by cables, and the dynamic thermal stability of the cables is poor, resulting in large energy losses during power transmission and reducing the overall efficiency of the system. During cable installation, the cable tray needs to be installed in place before the cables are laid. This step is cumbersome and time-consuming, and installation errors are prone to occur. During long-term operation, the workload of inspection and maintenance is large, and it is not convenient for maintenance and replacement.

[0004] In order to solve the limitations of existing technologies, a new medium frequency power cabinet connection method is needed to reduce temperature rise, reduce eddy current and impedance, improve dynamic thermal stability and shorten installation cycle, thereby improving the working efficiency and reliability of the equipment. Utility Model Content

[0005] The purpose of this utility model is to solve the deficiencies of the above prior art and provide a busbar structure for a medium frequency power supply cabinet, which uses a special arrangement structure of 27 conductive bars and busbar outlets to reduce eddy currents and line impedance. The following is a specific solution:

[0006] A busbar structure for a medium frequency power supply cabinet comprises a busbar duct and a three-way busbar, wherein the three-way busbar is provided with 27 conductive bars and busbar outlets, wherein the conductive bars consist of an A conductive bar, a B conductive bar and a C conductive bar, wherein one of each of the A conductive bar, the B conductive bar and the C conductive bar forms a conductive group, wherein the conductive groups are arranged in a 3 by 3 manner, wherein the conductive bars in the first row are arranged from left to right in the order of A conductive bar, B conductive bar, C conductive bar, C conductive bar, A conductive bar, B conductive bar, B conductive bar, C conductive bar and A conductive bar, and the arrangement of the conductive bars in the second and third rows is the same as that in the first row.

[0007] The vertically arranged busbar outgoing lines facilitate the connection between the busbar outgoing lines and the medium frequency power supply cabinet. The busbar outgoing lines include A busbar outgoing lines, B busbar outgoing lines and C busbar outgoing lines. The A busbar outgoing lines are vertically connected to the A conductive bar, the B busbar outgoing lines are vertically connected to the B conductive bar, and the C busbar outgoing lines are vertically connected to the C conductive bar.

[0008] The design of the outlet duct improves the structural strength of the outlet busbar and prevents the outlet wires from being damaged due to external force or other factors, thereby improving the reliability of the entire busbar structure. The busbar duct has the same three-way structure as the three-way busbar, and the busbar duct is also provided with an outlet duct, through which the busbar outlet wires are discharged.

[0009] Eddy currents and line impedance are reduced by material selection. The shell of the bus duct is made of aluminum-magnesium alloy, and the fasteners used to fix the bus duct are made of 304 stainless steel.

[0010] Furthermore, the conductive bar is made of copper.

[0011] In order to withstand higher impulse voltage, the outer side of the bus duct is covered with a polyester insulating film.

[0012] Beneficial effects: The conductive groups are arranged in a 3x3 manner, making the busbar structure more compact and saving equipment space; the arrangement of each row of conductive bars is the same, which helps to achieve standardized and modular design and facilitates production and maintenance; the conductive groups are arranged in a 3x3 manner, which reduces temperature rise, eddy current and impedance, improves dynamic thermal stability and reduces installation cycle, thereby improving the working efficiency and reliability of the equipment;

[0013] The conductive bars in the first row are arranged from left to right as A conductive bar, B conductive bar, C conductive bar, C conductive bar, A conductive bar, B conductive bar, B conductive bar, C conductive bar and A conductive bar. This arrangement ensures that the temperature rise of the three-way bus does not exceed 8K when the load is 80%, and also solves the electromagnetic thermal effect and resonance caused by the excessively high power frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural diagram of the busbar structure used for the medium frequency power supply cabinet;

[0015] Figure 2 It is a schematic diagram of the installation structure of the busbar structure used for the medium frequency power supply cabinet;

[0016] Figure 3 It is a schematic diagram of the structure of the internal conductive bar of the busbar structure used in the medium frequency power supply cabinet;

[0017] Figure 4 yes Figure 3 A schematic cross-sectional structure diagram of ;

[0018] Figure 5 yes Figure 1 Schematic diagram of the structural principle;

[0019] In the figure: 1. bus duct, 2. three-way busbar, 3. conductive bar, 4. busbar outlet, 31. A conductive bar, 32. B conductive bar, 33. C conductive bar, 5. conductive group, 6. A busbar outlet, 7. B busbar outlet, 8. C busbar outlet, 9. outlet duct. DETAILED DESCRIPTION

[0020] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0021] A busbar structure for a medium frequency power supply cabinet comprises a busbar duct 1 and a three-way busbar 2. The three-way busbar 2 is provided with 27 conductive bars 3 and busbar outlets 4. The conductive bars 3 are composed of A conductive bars 31, B conductive bars 32 and C conductive bars 33. One of each of the A conductive bar 31, the B conductive bar 32 and the C conductive bar 33 forms a conductive group 5. The conductive groups 5 are arranged in a 3 by 3 manner. The conductive bars 3 in the first row are arranged from left to right in the following order: A conductive bar 31, B conductive bar 32, C conductive bar 33, C conductive bar 33, A conductive bar 31, B conductive bar 32, B conductive bar 32, C conductive bar 33 and A conductive bar 31. The arrangement of the conductive bars 3 in the second and third rows is the same as that in the first row.

[0022] The vertically arranged busbar outgoing line 4 facilitates the connection between the busbar outgoing line 4 and the medium frequency power supply cabinet. The busbar outgoing line 4 includes an A busbar outgoing line 6, a B busbar outgoing line 7 and a C busbar outgoing line 8. The A busbar outgoing line 6 is vertically connected to the A conductive bar 31, the B busbar outgoing line 7 is vertically connected to the B conductive bar 32, and the C busbar outgoing line 8 is vertically connected to the C conductive bar 33.

[0023] The arrangement of the outlet duct 9 enhances the structural strength of the outlet busbar 4. The bus duct 1 has the same three-way structure as the three-way busbar 2. The bus duct 1 is further provided with an outlet duct 9 through which the busbar outlet 4 is outlet.

[0024] Eddy currents and line impedance are reduced by material selection. The shell of the bus duct 1 is made of aluminum-magnesium alloy, the fasteners used to fix the bus duct 1 are made of 304 stainless steel, the conductive bar 3 is made of copper, and the outer side of the bus duct 1 is covered with a polyester insulating film.

[0025] The following is the specific installation method of this device:

[0026] Install the medium frequency power supply cabinet at the designated location, fix it firmly, and check its stability; vertically connect the three groups of busbar outlets 4 of A, B, and C to the corresponding A, B, and C conductive bars 3 with fasteners, complete the assembly of the three-way busbar 2, and ensure that the connection is not affected by external force or vibration; connect the bus duct 1 to the three-way busbar 2 in accordance with the design requirements, ensure that all components are connected correctly, and then check and debug the performance indicators of the three-way busbar 2 to ensure the stable operation of the busbar structure. Compared with the existing cable installation method, this method is more convenient to install.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A busbar structure for a medium frequency power supply cabinet, characterized in that: It comprises a bus duct and a three-way busbar, wherein the three-way busbar is provided with 27 conductive bars and busbar outlets, wherein the conductive bars consist of A conductive bar, B conductive bar and C conductive bar, wherein one of each of A conductive bar, B conductive bar and C conductive bar forms a conductive group, wherein the conductive groups are arranged in a 3 by 3 manner, wherein the conductive bars in the first row are arranged from left to right in the order of A conductive bar, B conductive bar, C conductive bar, C conductive bar, A conductive bar, B conductive bar, B conductive bar, C conductive bar and A conductive bar, and the arrangement of the conductive bars in the second and third rows is the same as that in the first row.

2. A busbar structure for a medium frequency power supply cabinet according to claim 1, characterized in that: The busbar outgoing wires include A busbar outgoing wires, B busbar outgoing wires and C busbar outgoing wires. The A busbar outgoing wires are vertically connected to the A conductive bar, the B busbar outgoing wires are vertically connected to the B conductive bar, and the C busbar outgoing wires are vertically connected to the C conductive bar.

3. A busbar structure for a medium frequency power supply cabinet according to claim 1, characterized in that: The bus duct has the same three-way structure as the three-way busbar, and the bus duct is also provided with an outlet duct, through which the busbar outlet wires are discharged.

4. A busbar structure for a medium frequency power supply cabinet according to claim 1, characterized in that: The outer shell of the bus duct is made of aluminum-magnesium alloy, and the fasteners used to fix the bus duct are made of 304 stainless steel.

5. The busbar structure for a medium frequency power supply cabinet according to claim 1, characterized in that: The conductive bar is made of copper.

6. A busbar structure for a medium frequency power supply cabinet according to claim 1, characterized in that: The outer side of the bus duct is covered with a polyester insulating film.

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