阅读说明：本技术 一种户内高压大功率水冷变频器功率单元 (Indoor high-voltage high-power water-cooled frequency converter power unit ) 是由 方汉学 姚海嘉 李志刚 高海星 荣凯 梁开来 王成 刘兴状 侯胜旺 于 2021-08-30 设计创作，主要内容包括：本发明公开一种户内高压大功率水冷变频器功率单元,采用水冷散热方式,包括单元壳体、整流逆变模块、薄膜电容、逆变叠层母排、单元控制模块、熔断器和扩展电容模块,整流逆变模块和薄膜电容均安装在单元壳体底座上,并且整流逆变模块上端面和薄膜电容上端面平齐；逆变叠层母排安装在整流逆变模块和薄膜电容上方；单元控制模块安装在单元壳体前端,扩展电容模块安装在功率单元后侧,逆变叠层母排与扩展电容模块中的扩展电容母排对接。本发明散热效率高,布局合理,能够减小杂散电感,降低电压尖峰。(The invention discloses an indoor high-voltage high-power water-cooled frequency converter power unit which adopts a water-cooled heat dissipation mode and comprises a unit shell, a rectification inversion module, a thin film capacitor, an inversion laminated busbar, a unit control module, a fuse and an expansion capacitor module, wherein the rectification inversion module and the thin film capacitor are both arranged on a base of the unit shell, and the upper end surface of the rectification inversion module is flush with the upper end surface of the thin film capacitor; the inversion laminated busbar is arranged above the rectification inversion module and the thin film capacitor; the unit control module is installed at the front end of the unit shell, the expansion capacitor module is installed at the rear side of the power unit, and the inversion laminated busbar is in butt joint with the expansion capacitor busbar in the expansion capacitor module. The invention has high heat dissipation efficiency and reasonable layout, and can reduce stray inductance and voltage peak.)

1. The utility model provides an indoor high-pressure high-power water-cooling converter power unit which characterized in that: adopts a water-cooling heat radiation mode, comprises a unit shell, a rectification inversion module (8), a thin film capacitor (16), an inversion laminated busbar (15), a unit control module (13) and an expansion capacitor module (23),

the rectification inversion module (8) and the thin film capacitor (16) are both arranged on the base of the unit shell, and the upper end surface of the rectification inversion module (8) is flush with the upper end surface of the thin film capacitor (16); the inversion laminated busbar (15) is tiled above the rectification inversion module (8) and the thin film capacitor (16);

the unit control module (13) is installed at the front end of the unit shell, the expansion capacitor module (23) is installed on the rear side of the power unit, and the inversion laminated busbar (15) is in butt joint with the expansion capacitor busbar in the expansion capacitor module (23).

2. The indoor high-voltage high-power water-cooled frequency converter power unit according to claim 1, characterized in that: rectifier and inverter module (8) are including water-cooling board (1), IGBT (2), go up insulating support (3), rectifier connecting bar (4), lower insulating support (5), rectifier bridge (6) and the female (7) of arranging of rectification stromatolite, IGBT (2), it installs in water-cooling board (1) openly to go up insulating support (3), rectifier bridge (6), the female (7) of arranging of rectification stromatolite, install at water-cooling board (1) back down insulating support (5), install in water-cooling board (1) side rectifier connecting bar (4), it is used for fixed rectifier connecting bar (4) to go up insulating support (3), and it has the locating hole to go up to open on insulating support (3), realize that rectifier connecting bar (4) and the female connection of arranging (7) of rectification stromatolite, rectifier connecting bar (4) link to each other with the female row (15) of contravariant stromatolite.

3. The indoor high-voltage high-power water-cooled frequency converter power unit according to claim 1, characterized in that: the unit control module (13) comprises an insulator (9), a control mounting plate (10), a unit control plate (11) and a switch power supply (12), the control mounting plate (10) is vertically mounted at the front end of the unit shell, the unit control plate (11) and the switch power supply (12) are mounted at the front end of the control mounting plate (10), and the insulator (9) is mounted at the upper end of the control mounting plate (10).

4. The indoor high-voltage high-power water-cooled frequency converter power unit according to claim 3, characterized in that: the unit control module (13) is arranged at the front end of the rectification inverter module (8) and is close to the IGBT (2) and is arranged at an angle of 90 degrees relative to the IGBT (2).

5. The indoor high-voltage high-power water-cooled frequency converter power unit according to claim 3, characterized in that: control mounting panel (10) lower part is hollowed, and three-phase input copper bar (18) and fuse (20) are all installed in this portion of hollowed and are fixed through fixed cross beam (19), and three-phase input copper bar (18), fuse (20) link to each other with rectifier bridge (6), and three-phase output copper bar (14) are located arrangement contravariant module (8) top, and three-phase output copper bar (14) link to each other with contravariant stromatolite female arranging (15).

6. The indoor high-voltage high-power water-cooled frequency converter power unit according to claim 1, characterized in that: the expansion capacitor module (23) comprises an expansion capacitor base (22), a thin film capacitor (16) and an expansion laminated busbar (21), wherein the expansion capacitor base (22) is connected to the rear side of the base of the unit shell, the thin film capacitor (16) is located above the expansion capacitor base (22), the expansion laminated busbar (21) is tiled above the thin film capacitor (16), and the expansion laminated busbar (21) is connected with the inversion laminated busbar (15).

7. The indoor high-voltage high-power water-cooled frequency converter power unit according to claim 1, characterized in that: the base of the unit shell is Z-shaped and is formed by bending a steel plate at one time.

8. The indoor high-voltage high-power water-cooled frequency converter power unit according to claim 5, characterized in that: the wiring terminals of the three-phase input copper bar (18) and the three-phase output copper bar (14) all face to the front of the unit.

9. The indoor high-voltage high-power water-cooled frequency converter power unit according to claim 1, characterized in that: the quick water joint (26) is arranged at the front end of the water cooling plate (1).

Technical Field

The invention relates to the technical field of indoor high-voltage high-power water-cooled frequency converters, in particular to a power unit of an indoor high-voltage high-power water-cooled frequency converter adopting a pure water radiator.

Background

In recent years, with the increase of large-scale loads, the demand for high-voltage high-power frequency converters has increased. At present, the heat dissipation modes of the high-voltage frequency converter mainly comprise air-cooled heat dissipation and water-cooled heat dissipation. Air-cooled heat dissipation is the mainstream heat dissipation mode at present because of the better economical efficiency. Because the field environment of many frequency converters is bad, sand blown by the wind, moisture, corrosive gas and the like are one of the main factors influencing the failure rate of the frequency converters, and the reliability of products can be greatly reduced by air cooling and heat dissipation. The high-voltage high-power device has larger heat productivity, and the common air-cooled heat dissipation can not meet the heat dissipation requirement of the frequency converter, and a heat dissipation mode of pure water cooling is needed.

The high-power frequency converter power unit is higher in failure rate than the low-power frequency converter power unit, the failure rate is mainly concentrated on a control part, and the structural design needs to mainly consider the maintenance and overhaul of the control part. The most common design mode at present is to install the control part at the inner side of the unit, and the power unit needs to be detached from the whole machine during maintenance and overhaul.

The high-power frequency converter has large current, more used devices and reasonable structural layout, and the difficult problem that how to reduce stray inductance and reduce voltage peak is needed to overcome is solved.

Disclosure of Invention

Aiming at the defects of the prior art, the invention discloses a power unit of an indoor high-voltage high-power water-cooled frequency converter, which has high heat dissipation efficiency and reasonable layout, and can reduce stray inductance and voltage spike.

In order to solve the technical problem, the technical scheme adopted by the invention is as follows: a power unit of an indoor high-voltage high-power water-cooled frequency converter adopts a water-cooled heat dissipation mode and comprises a unit shell, a rectifying inversion module, a thin film capacitor, an inversion laminated busbar, a unit control module, a fuse and an extension capacitor module,

the rectification inversion module and the thin film capacitor are both arranged on the unit shell base, and the upper end surface of the rectification inversion module is flush with the upper end surface of the thin film capacitor; the inversion laminated busbar is arranged above the rectification inversion module and the thin film capacitor;

the unit control module is installed at the front end of the unit shell, the expansion capacitor module is installed at the rear side of the power unit, and the inversion laminated busbar is in butt joint with the expansion capacitor busbar in the expansion capacitor module.

Further, the rectification contravariant module includes water-cooling board, IGBT, go up insulating support, the rectifier connecting row, lower insulating support, rectifier bridge and the female row of rectification stromatolite, IGBT, it installs openly at water-cooling board to go up insulating support, the rectifier bridge, the female row of rectification stromatolite, lower insulating support installs at water-cooling board back, the rectifier connecting row is installed in water-cooling board side, it is used for fixed rectifier connecting row to go up insulating support, and it has the locating hole to go up to open on the insulating support, realize that rectifier connecting row and the female connection of arranging of rectification stromatolite, rectifier connecting row and the female row of contravariant stromatolite link to each other.

Further, the unit control module comprises an insulator, a control mounting plate, a unit control plate and a switch power supply, the control mounting plate is vertically mounted at the front end of the unit shell, the unit control plate and the switch power supply are mounted at the front end of the control mounting plate, and the insulator is mounted at the upper end of the control mounting plate.

Furthermore, the unit control module is arranged at the front end of the rectification inverter module, is close to the IGBT and is arranged at an angle of 90 degrees relative to the IGBT.

Further, control mounting panel lower part is hollowed, and three-phase input copper bar and fuse are all installed in this portion of hollowed and are fixed through fixed cross beam, and three-phase input copper bar links to each other with the female row of rectifier stack, and three-phase output copper bar is located arrangement contravariant module top, and three-phase output copper bar is female to link to each other with the female row of contravariant stack.

Furthermore, the extension capacitor module comprises an extension capacitor base, a thin film capacitor and an extension laminated busbar, wherein the extension capacitor base is connected to the rear side of the unit shell base, the thin film capacitor is located above the extension capacitor base, the extension laminated busbar is located above the thin film capacitor, and the extension laminated busbar is connected with the inversion laminated busbar.

Furthermore, the base of the unit shell is Z-shaped and is formed by bending a steel plate at one time.

Furthermore, the wiring terminals of the three-phase input copper bar and the three-phase output copper bar all face to the front of the unit.

Furthermore, a quick water joint is arranged at the front end of the water cooling plate.

The invention has the beneficial effects that: IGBT and rectifier bridge install respectively on water-cooling board and back, can effectively reduce the volume of water-cooling board, and overall structure is compact. The installation accuracy that requires between rectification contravariant module and the film capacitor is higher, and rectification contravariant module up end and film capacitor wiring up end parallel and level, the direct tiling of stromatolite female arranging is on it to with the distance design between IGBT and the film capacitor to minimum, can effectively reduce the peak voltage on the generating line. The unit shell base adopts a Z-shaped design, the upper and lower processing precision of the shell can be effectively ensured, and the damage of devices caused by the installation stress of the devices due to the processing precision problem is effectively avoided. The rectification connecting bar penetrates between the rectification inversion module and the thin film capacitor and is connected with the inversion laminated busbar at the bottom, so that the distance between the rectification connecting bar and the inversion laminated busbar is effectively shortened, and the electrical performance is improved. The unit control module is installed in front of the unit, and the upper surface is an output copper bar, the lower surface is an input copper bar, and the unit control module and the IGBT are placed in a 90-degree mode, the driving wire is designed to be the shortest, and the operation reliability of the unit is improved. Input copper bar, output copper bar, water injection well choke, unit control panel communication interface all design at the unit front end, make things convenient for the wiring and overhaul the maintenance, make things convenient for the device to change. The power unit adopts the mode of capacitance extension, prevents that single power unit is too big, installation is inconvenient.

Drawings

FIG. 1 is a schematic diagram of an external structure of a power unit;

FIG. 2 is a schematic diagram of an internal structure of a power unit;

FIG. 3 is a schematic diagram of another angle configuration inside the power unit;

fig. 4 is a schematic structural diagram of the front side of the rectification and inversion module;

fig. 5 is a schematic structural diagram of the back side of the rectification inverter module;

FIG. 6 is a schematic structural diagram of a unit control module;

FIG. 7 is a schematic structural diagram of an extended capacitance module;

in the figure: 1. the water-cooled plate, 2, IGBT, 3, go up insulating support, 4, the rectifier connecting bar, 5, lower insulating support, 6, the rectifier bridge, 7, the female row of rectification stromatolite, 8, the rectification contravariant module, 9, the insulator, 10, the control mounting panel, 11, the unit control panel, 12, switching power supply, 13, the unit control module, 14, output copper bar, 15, the female row of contravariant stromatolite, 16, film capacitor, 17, the female row of unit casing, 18, input copper bar, 19, fixed beam, 20, the fuse, 21, the female row of extension stromatolite, 22, extension capacitor base, 23, the extension capacitor module, 24, unit casing protecgulum, 25, the unit casing upper cover, 26, quick water swivel.

Detailed Description

The invention is further described with reference to the following figures and specific embodiments.

Example 1

The embodiment discloses an indoor high-voltage high-power water-cooled frequency converter power unit which adopts a pure water cooling heat dissipation mode and comprises a unit shell, a rectification inversion module 8, a thin film capacitor 16, an inversion laminated busbar 15, a unit control module 13, a fuse 20 and an extension capacitor module 23.

As shown in fig. 1, the unit housing includes a unit housing base 17, a unit front cover 24 and a unit upper cover 25, the unit housing base 17 is located at the bottom of the power unit and is used for bearing components of the power unit, the unit housing upper cover 24 is installed above the unit housing base 17, the unit housing upper cover is located in front of the unit housing base 17, the components of the power unit are located in a unit housing space enclosed by the unit housing base 17, the unit front cover 24 and the unit upper cover 25, and the unit housing is used for protecting internal devices and improving appearance. The quick water joint 26 is installed at the front end of the power unit and used for circulating water to realize water cooling and heat dissipation.

As shown in fig. 2, the rectification inverter module 8 and the thin film capacitor 16 are both mounted on the unit housing base 17, the mounting accuracy required between the rectification inverter module 8 and the thin film capacitor 16 is high, the upper end surface of the rectification inverter module 8 is flush with the upper end surface of the thin film capacitor 16, the inverter laminated busbar 15 is directly laid above the rectification inverter module 8 and the thin film capacitor 16, the distance between the IGBT2 in the rectification inverter module 8 and the thin film capacitor 16 is controlled to be minimum, and the peak voltage on the bus can be effectively reduced.

The unit control module 13 is installed at the front end of the unit shell, which is also the front end of the rectification inverter module 8. The extension capacitor module 23 is installed at the rear side of the rectification inversion module 8, and the inversion laminated busbar 15 is in butt joint with an extension capacitor busbar 21 in the extension capacitor module. The unit control module 13 is arranged right ahead the unit shell, the wiring is short, and the disassembly and the maintenance are convenient. The extended capacitor module 23 is installed at the rear side of the power unit, so that the inconvenience of too large installation of a single unit is avoided.

As shown in fig. 4 and 5, the rectification inverter module 8 includes a water-cooling plate 1, an IGBT2, an upper insulating support 3, a rectification connecting bar 4, a lower insulating support 5, a rectification bridge 6 and a rectification laminated busbar 7, an IGBT2, the upper insulating support 3 is installed on the front of the water-cooling plate 1, the rectification bridge 6, the rectification laminated busbar 7, the lower insulating support 5 is installed on the back of the water-cooling plate 1, the rectification connecting bar 4 is installed on the side of the water-cooling plate 1, the upper insulating support 3 is used for fixing the rectification connecting bar 4, and a positioning hole is formed in the upper insulating support 3, so that the rectification connecting bar 4 is connected with the rectification laminated busbar 7, the rectification connecting bar 4 is connected with the inversion laminated busbar 15, and the rectification bridge 6 is connected with the rectification laminated busbar 7.

In this embodiment, the IGBT2 and the rectifier bridge 6 are respectively installed on the upper surface and the back surface of the water-cooling plate 1, so that the volume of the water-cooling plate can be effectively reduced, and the overall structure is compact. The rectification connecting bar 4 is connected with the inversion laminated busbar 15 from the bottom of the inversion laminated busbar 15, and the rectification connecting bar 4 is arranged on the side face of the water cooling plate 1 in advance and is fixed through the upper insulating support 3 in order to ensure the reliable connection between the rectification connecting bar 4 and the inversion laminated busbar 15. As shown in fig. 3, the fixed rectifying connection bar 4 penetrates through the rectifying and inverting module 8 and the thin film capacitor 16, and is connected with the inverting laminated busbar 15 at the bottom, so that the distance between the rectifying connection bar and the inverting laminated busbar 15 is effectively shortened, and the electrical performance is improved.

As shown in fig. 6, the unit control module 13 includes an insulator 9, a control mounting plate 10, a unit control plate 11 and a switching power supply 12, the control mounting plate 10 is vertically installed at the front end of the unit housing, the unit control plate 11 and the switching power supply 12 are installed at the front end of the control mounting plate 10, and the insulator 9 is installed at the upper end of the control mounting plate 10.

In this embodiment, the unit control module using the control mounting plate 10 as a carrier is vertically mounted at the front end of the unit housing, so that dust accumulation can be effectively reduced.

The unit control module 13 is arranged at the front end of the rectification inverter module 8, is close to the IGBT2 and is placed at 90 degrees relative to the IGBT2, and the IGBT2 driving wire is short, so that the unit control module is convenient to disassemble and maintain.

As shown in fig. 6, 2 and 3, the lower portion of the control mounting plate 10 is hollowed, a three-phase input copper bar 18 and a fuse 20 are both mounted in the hollowed portion and fixed through a fixed cross beam 19, the three-phase input copper bar 18 is connected with the rectifying laminated busbar 7, a three-phase output copper bar 14 is located above the arranging inversion module 8, and the three-phase output copper bar 8 is connected with the inversion laminated busbar 15. The wiring terminals of the three-phase input copper bar 18 and the three-phase output copper bar 14 face to the front of the unit, so that external wiring is facilitated.

As shown in fig. 7, the extended capacitor module includes an extended capacitor base 22, a thin film capacitor 16, and an extended laminated busbar 21, where the extended capacitor base 22 is connected to the rear side of the unit housing base 17, the thin film capacitor 16 is located above the extended capacitor base 22, the extended laminated busbar 21 is located above the thin film capacitor 16, and the extended laminated busbar 21 is connected to the inverted laminated busbar 15. The quick water joint 26 is arranged at the front end of the water cooling plate and used for circulating water to realize water cooling heat dissipation.

In this embodiment, unit housing base 17 is the zigzag, adopts a steel sheet bending one shot forming, can effectively guarantee the machining precision about the casing, effectively avoids because the machining precision problem leads to the device installation atress, causes the damage of device.

The invention reduces stray inductance and voltage peak through reasonable structural design and layout, and is convenient for equipment maintenance.

The foregoing description is only for the basic principle and the preferred embodiments of the present invention, and modifications and substitutions by those skilled in the art are included in the scope of the present invention.