Split and freely combined type medium-pressure water-cooling power unit

Abstract

The utility model relates to a split and freely combined type medium-voltage water-cooled power unit, which comprises a rectification power module and an inversion power module, the rectification power module and the inversion power module are arranged in parallel, and the rectification power module and the inversion power module are connected through a confluence busbar; the number of the rectification power modules and the number of the inversion power modules are both more than one. The rectification power module and the inversion power module employ water cooling heat dissipation. The utility model is composed of the rectification power modules and the inversion power modules which have independent box-type structures and have independent functions, the number of the rectification power modules and the number of the inversion power modules can be freely combined according to load conditions, and the utility model has the advantages of strong expansibility, convenient movement, convenient maintenance and compact structure.

Description

Technical Field

[0001] This utility model belongs to the field of frequency converter technology, and in particular relates to a split and freely combinable medium-pressure water-cooled power unit. Background Technology

[0002] Frequency converters are developing towards lower noise, higher performance, and higher reliability. General-purpose frequency converters, with their advantages of wide speed range, high speed accuracy, fast dynamic response, high efficiency, and convenient operation, have achieved good results in saving energy, controlling industrial production processes, and improving the level of enterprise automation.

[0003] Some loads, such as medium-voltage motors that require speed regulation, are key equipment in the production process. The application of medium-voltage frequency converters is being gradually promoted and is widely used in metallurgy, power, petrochemical, mining, power plants, sewage treatment and other fields. They play an important role in energy saving and improving the level of enterprise automation.

[0004] As the core component of a medium-voltage frequency converter, the power unit plays a decisive role in the converter's structure, size, control method, and stable operation. Currently, the main heat dissipation method for medium-voltage power units is air cooling. Power units often integrate the rectifier and inverter modules into a single module. This design not only suffers from large size and high manufacturing costs, but also results in a correspondingly large power cabinet, leading to high manufacturing costs, difficulties in unit transport, and challenging operation. Summary of the Invention

[0005] The purpose of this invention is to provide a modular and freely combinable medium-pressure water-cooled power unit, which consists of multiple independent functional box structures. Each independent functional box structure can be freely combined, is expandable, and is easy to maintain.

[0006] To achieve the above objectives, this utility model employs the following technical solution:

[0007] A split and freely combinable medium-pressure water-cooled power unit includes a rectifier power module and an inverter power module, wherein the rectifier power module and the inverter power module are placed in parallel and connected through a busbar; the number of each rectifier power module and inverter power module is one or more; both the rectifier power module and the inverter power module adopt water cooling heat dissipation.

[0008] Both the rectifier power module and the inverter power module have rollers connected to their bottoms.

[0009] The rectifier power module and the inverter power module are provided with a water inlet at the bottom and a water outlet at the top.

[0010] Both the rectifier power module and the inverter power module are box-type structures.

[0011] The box-type structure is fixedly connected with a handle.

[0012] The rectifier power module includes a rectifier module driver board assembly, a rectifier input bus, a rectifier water-cooled plate, a rectifier output bus, and a rectifier bridge. The rectifier bridge is arranged on the rectifier water-cooled plate, which is located in the upper middle part of the rectifier power module. The rectifier module driver board assembly is located in the lower front part of the rectifier power module. The rectifier input bus is connected to the rectifier bridge, and the rectifier bridge is connected to the busbar via the rectifier output bus.

[0013] The inverter power module includes an inverter module driver board assembly, an inverter composite busbar, an inverter input busbar, an inverter water-cooled plate, an IGBT module, and an inverter output busbar. The IGBT module is arranged on the inverter water-cooled plate, which is located in the upper middle part of the inverter power module. The inverter module driver board assembly is located in the lower front part of the inverter power module. The inverter input busbar is connected to the IGBT module through the inverter composite busbar, and the IGBT module is connected to the inverter output busbar. The inverter composite busbar is connected to the busbar.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model consists of a rectifier power module and an inverter power module with independent box-type structures, each with independent functions. The number of rectifier power modules and inverter power modules can be freely combined according to the load conditions. It has the advantages of strong expandability, convenient mobility, convenient maintenance, and compact structure.

[0016] 2. This utility model can more effectively solve the heat dissipation problem of the power unit by using water cooling, thereby improving the heat dissipation effect of the power unit.

[0017] 3. Each power module of this utility model adopts a roller structure design, which makes it easier to disassemble and maintain the power unit, and it is also easy to move and has strong environmental adaptability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a split and freely combinable medium-pressure water-cooled power unit.

[0019] Figure 2 This is a schematic diagram of the rectifier power module.

[0020] Figure 3 This is a schematic diagram of the inverter power module.

[0021] In the diagram: 1-Rectifier power module; 2-Inverter power module; 3-Busbar; 4-Handle; 5-Rectifier module driver board assembly; 6-Roller assembly; 7-Rectifier input busbar; 8-Rectifier water-cooled plate; 9-Rectifier output busbar; 10-Rectifier bridge; 11-Inlet; 12-Outlet; 13-Inverter output busbar; 14-Inverter module driver board assembly; 15-Inverter composite busbar; 16-Inverter input busbar; 17-Inverter water-cooled plate; 18-IGBT module. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings. However, it should be noted that the implementation of the present invention is not limited to the following embodiments.

[0023] Example 1

[0024] See Figure 1 This is a modular, freely combinable medium-pressure water-cooled power unit, comprising a rectifier power module 1 and an inverter power module 2. Both rectifier power module 1 and inverter power module 2 are box-type structures, placed in parallel, and connected via a busbar 3. The number of rectifier power module 1 and inverter power module 2 can be more than one, and can be freely combined and configured according to needs. The length of busbar 3 can be designed according to the number of rectifier power module 1 and inverter power module 2 modules. Both rectifier power module 1 and inverter power module 2 utilize water cooling for heat dissipation.

[0025] Example 2

[0026] Based on Embodiment 1, both the rectifier power module 1 and the inverter power module 2 are equipped with rollers 6 at their bottoms, facilitating their movement. When any module in the power unit fails, the rectifier power module 1 and inverter power module 2 can be freely disassembled. The presence of rollers 6 on both modules makes disassembly and movement very convenient, allowing for easy removal of the faulty module for individual maintenance. Furthermore, the weight of a single module is significantly lighter than the entire power unit, simplifying assembly, disassembly, and maintenance.

[0027] Example 3

[0028] Based on Embodiment 1, the rectifier power module 1 adopts the following structure, see Figure 2 :

[0029] The rectifier power module 1 includes a housing and, within the housing, a rectifier module driver board assembly 5, a rectifier input busbar 7, a rectifier water-cooled plate 8, a rectifier output busbar 9, a rectifier bridge 10, and insulating components. The rectifier bridges 10 are evenly distributed on the rectifier water-cooled plate 8, which dissipates heat from the rectifier bridges 10 through an internal water-cooling system. The rectifier power module 1 has a water inlet 11 at the bottom and a water outlet 12 at the top. The rectifier water-cooled plate 8 is fixed to the upper middle part of the housing, the rectifier module driver board assembly 5 is located at the lower front of the housing, the rectifier input busbar 7 is connected to the rectifier bridge 10, and the rectifier bridge 10 is connected to the busbar 3 via the rectifier output busbar 9.

[0030] Example 4

[0031] Based on Embodiment 1 or Embodiment 3, the inverter power module 2 adopts the following structure, see Figure 3 :

[0032] The inverter power module 2 includes a housing and, housed within the housing, an inverter module driver board assembly 14, an inverter composite busbar 15, an inverter input busbar 16, an inverter water-cooled plate 17, IGBT modules 18, an inverter output busbar 13, and insulating components. The IGBT modules 18 are evenly distributed on the inverter water-cooled plate 17, which dissipates heat from the IGBT modules 18 through an internal water-cooling system. The inverter power module 2 has a water inlet 11 at the bottom and a water outlet 12 at the top. The inverter water-cooled plate 17 is located in the upper middle part of the housing, while the inverter module driver board assembly 14 is located in the lower front part of the housing. The inverter input busbar 16 is connected to the IGBT modules 18 via the inverter composite busbar 15, and the IGBT modules 18 are connected to the inverter output busbar 13 for output. The inverter composite busbar 15 is connected to the busbar 3.

[0033] To facilitate movement, handles 4 are fixedly connected to the housings of rectifier power module 1 and inverter power module 2.

[0034] When the power unit is installed on the power cabinet, the water inlets 11 of the rectifier power module 1 and the inverter power module 2 are connected in parallel through water inlet pipes, and the water outlets 12 are connected in parallel through water outlet pipes. With this design, cooling water is supplied to the rectifier power module 1 and the inverter power module 2 for cooling and heat dissipation, resulting in better heat dissipation performance for the power unit.

[0035] This utility model adopts a split, modular, and freely combinable design. By adjusting the configuration quantity of rectifier power module 1 and inverter power module 2, the design power of the power unit can be increased or decreased, giving the power unit strong scalability and consistency.

[0036] The above embodiments are implemented based on the technical solution of this invention, providing detailed implementation methods and specific operation processes. However, the scope of protection of this invention is not limited to the above embodiments. Based on the disclosed embodiments, those skilled in the art can arbitrarily combine different technical features to achieve different technical solutions. Due to space limitations and for the sake of brevity, each of these combined solutions has not been described in detail. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A split and freely combinable medium voltage water cooled power unit, characterized in that, It includes a rectifier power module and an inverter power module, which are placed in parallel and connected via a busbar; the number of rectifier power modules and inverter power modules is one or more, and the number of rectifier power modules and inverter power modules can be freely combined; both rectifier power modules and inverter power modules use water cooling. The rectifier power module and the inverter power module are provided with a water inlet at the bottom and a water outlet at the top; The rectifier power module includes a rectifier module driver board assembly, a rectifier input bus, a rectifier water-cooled plate, a rectifier output bus, and a rectifier bridge. The rectifier bridge is arranged on the rectifier water-cooled plate, which is located in the upper middle part of the rectifier power module. The rectifier module driver board assembly is located in the lower front part of the rectifier power module. The rectifier input bus is connected to the rectifier bridge, and the rectifier bridge is connected to the busbar via the rectifier output bus. The inverter power module includes an inverter module driver board assembly, an inverter composite busbar, an inverter input busbar, an inverter water-cooled plate, an IGBT module, and an inverter output busbar. The IGBT module is arranged on the inverter water-cooled plate, which is located in the upper middle part of the inverter power module. The inverter module driver board assembly is located in the lower front part of the inverter power module. The inverter input busbar is connected to the IGBT module through the inverter composite busbar, and the IGBT module is connected to the inverter output busbar. The inverter composite busbar is connected to the busbar.

2. A split and freely combinable medium voltage water cooled power unit according to claim 1, characterized in that, Both the rectifier power module and the inverter power module have rollers connected to their bottoms.

3. A split and freely combinable medium voltage water cooled power unit according to claim 1, characterized in that, Both the rectifier power module and the inverter power module are box-type structures.

4. A split and freely combinable medium voltage water cooled power unit according to claim 3, characterized in that, The box-type structure is fixedly connected with a handle.

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