High-power water-cooling integrated power unit

Abstract

The utility model relates to a high-power water-cooling integrated power unit, which comprises a rectification and inversion integrated module, a capacitor module and a capacitor laminated busbar, the rectification and inversion integrated module is electrically connected with the capacitor module through the capacitor laminated busbar, and both the rectification and inversion integrated module and the capacitor module are box-type structures. The capacitor module and the rectification and inversion integrated module are arranged side by side. The high-voltage frequency converter has the advantages that the power unit of the high-voltage frequency converter is divided into two box bodies with independent functions, and the expansibility of the power unit is realized by increasing, decreasing, replacing or changing any one of the modules.

Description

Technical Field

[0001] The utility model belongs to the technical field of frequency converters, and in particular relates to a high-power water-cooling integrated power unit. Background Art

[0002] High-voltage inverters are widely used in industries such as power generation, metallurgy, municipal engineering, and petrochemicals. With advancements in high-power electronic devices and electrical transmission technology, the high-voltage inverter industry is entering a period of rapid development. As the core component of a high-voltage inverter, the power unit plays a decisive role in its structure, size, and stable operation.

[0003] Currently, the main heat dissipation method for high-power power units is water cooling. Due to their high voltage and heat generation, existing high-power water-cooled power units are often designed with independent components such as a rectifier module, an inverter module, and a capacitor module. To address the heat generation problem, water cooling and heat dissipation systems are installed on the rectifier module and inverter module respectively. For example, patent application number: CN201821251343.5 discloses a modular water-cooled power unit, including a rectifier module, a capacitor module, and an inverter module. The rectifier module, capacitor module, and inverter module are all box-type structures, and their internal components are installed in their respective boxes. The rectifier module, capacitor module, and inverter module are arranged in sequence from left to right and are electrically connected to each other via capacitor stack busbars. The rectifier module has a rectifier module water inlet at the top and a rectifier module water outlet at the bottom. The inverter module has an inverter module water inlet at the top and an inverter module water outlet at the bottom. Although this structure is easy to transport and assemble, the design is large in size and has high manufacturing costs. In addition, the power cabinet will also be correspondingly large in size, with high manufacturing costs and difficulty in lifting. Summary of the Invention

[0004] The purpose of the utility model is to provide a high-power water-cooled integrated power unit, which splits the power unit of a high-voltage inverter into two boxes with independent functions. The power unit of this structure is scalable, easy to maintain and has a small size.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A high-power water-cooled integrated power unit includes a rectifier-inverter integrated module, a capacitor module, and a capacitor stack busbar. The rectifier-inverter integrated module and the capacitor module are electrically connected via the capacitor stack busbar. Both the inverter-rectifier integrated module and the capacitor module are box-type structures. The capacitor module and the rectifier-inverter integrated module are arranged side by side.

[0007] The rectifier-inverter integrated module includes a rectifier-inverter box, a water-cooled plate assembly, a drive plate assembly, a composite busbar, a fuse, a transformer assembly, an IGBT module, a temperature-controlled switch, and a rectifier bridge. The water-cooled plate assembly is fixed in the rectifier-inverter box, and the electrical components in the water-cooled plate assembly are electrically connected to the fuse through the composite busbar; the drive plate assembly is fixedly connected to the rectifier-inverter box, and the drive plate assembly is electrically connected to the transformer assembly, IGBT module, temperature-controlled switch, and fuse through cables; the IGBT module, temperature-controlled switch, and rectifier bridge are fixedly connected to the water-cooled plate assembly.

[0008] The water cooling plate assembly includes a water inlet, a water outlet, and a water cooling plate. The water cooling plate is fixedly connected to the rectifier bridge, IGBT module, and temperature control switch by bolts. The upper and lower ends of the side of the water cooling plate are respectively connected to the water outlet and the water inlet.

[0009] The water cooling plate is assembled and fixed on the lower front end of the rectifier inverter box.

[0010] The driving board is assembled and fixed on the upper front end of the rectifier and inverter box.

[0011] A handle is fixedly connected to the front end of the rectifier and inverter box.

[0012] The capacitor module includes a capacitor module box, a connecting column, and a capacitor. A connecting column is fixed in the middle of the front end of the capacitor module box for connecting to the capacitor stack busbar; the capacitor is encapsulated in the capacitor module box; the capacitor is electrically connected to the capacitor stack busbar through the connecting column.

[0013] A handle is fixedly connected to the front end of the capacitor module box.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The utility model splits the power unit of the high-voltage inverter into two boxes with independent functions, and realizes the scalability of the power unit by adding, subtracting, replacing or changing any one of the modules.

[0016] 2. This new design integrates the rectifier and inverter functions into a single module, making it more compact and smaller, while also facilitating maintenance and enhancing environmental adaptability. The integrated rectifier and inverter module and the capacitor module are electrically connected via a stacked capacitor busbar. If a fault occurs in either module, the faulty module can be removed and maintained by simply removing the stacked capacitor busbar.

[0017] 3. The rectifier and inverter functional modules of the present invention use the same water cooling system, which reduces the volume of the water cooling system without affecting the cooling effect, and reduces the production cost compared with conventional water-cooled frequency conversion products. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the present utility model.

[0019] Figure 2 This is a schematic diagram of the internal structure of the rectifier-inverter integrated module.

[0020] Figure 3 It is a schematic diagram of the water cooling plate assembly.

[0021] Figure 4 It is a structural diagram of the capacitor module.

[0022] In the figure: 1-Rectifier inverter box 2-Capacitor module box 3-Capacitor stack busbar 4-Handle 5-Water cooling plate assembly 6-Drive board assembly 7-Compound busbar 8-Fuse 9-Transformer assembly 10-Output copper busbar 11-Input copper busbar 12-Water outlet 13-Water inlet 14-IGBT module 15-Temperature control switch 16-Water cooling plate 17-Rectifier bridge 18-Resistor DETAILED DESCRIPTION

[0023] The present invention will be described in detail below 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.

[0024] Example 1

[0025] See Figure 1 The high-power water-cooled integrated power unit includes a rectifier-inverter integrated module, a capacitor module, and a capacitor stack busbar 3. The rectifier-inverter integrated module and the capacitor module are electrically connected through the capacitor stack busbar 3. The inverter-rectifier integrated module and the capacitor module are both box-type structures. The capacitor module and the rectifier-inverter integrated module are arranged side by side on the left and right.

[0026] See Figure 2 The components within the integrated rectifier-inverter module are all installed within the rectifier-inverter housing 1. The integrated rectifier-inverter module includes the rectifier-inverter housing 1, a water-cooling plate assembly 5, a driver board assembly 6, a composite busbar 7, a fuse 8, a transformer assembly 9, an IGBT module 14, a temperature-controlled switch 15, and a rectifier bridge 17. The water-cooling plate assembly 5 is fixed to the lower front end of the rectifier-inverter housing 1. The water-cooling plate assembly 5 is electrically connected to the fuse 8 via the composite busbar 7. The composite busbar 7 is connected to the output copper busbar 10 and the input copper busbar 11, which are in turn connected to the capacitor stack busbar 3. The driver board assembly 6 is fixed to the upper front end of the rectifier-inverter housing 1. The relevant driver boards within this driver board assembly 6 are electrically connected to the transformer assembly 9, the IGBT module 14, the temperature-controlled switch 15, and the fuse 8 via cables. The IGBT module 14, the temperature-controlled switch 15, and the rectifier bridge 17 are fixedly connected to the water-cooling plate assembly 5.

[0027] See Figure 3The water-cooling plate assembly 5 includes a water inlet 13, a water outlet 12, and a water-cooling plate 16. The water-cooling plate 16 is fixedly connected to the rectifier bridge 17, the IGBT module 14, the temperature control switch 15, and the resistor 18 via bolts. The resistor 18 is electrically connected to the composite busbar via cables. The upper and lower ends of the side of the water-cooling plate 16 are connected to the water outlet 12 and the water inlet 13, respectively.

[0028] When the high-power water-cooled integrated power unit is installed on the power cabinet, the water inlet 13 of the rectifier-inverter integrated module is connected in parallel through the water inlet pipe, and the water outlet 12 is connected in parallel through the water outlet pipe. The cooling water cools and dissipates heat for the inverter-rectifier integrated module, making it have better heat dissipation performance.

[0029] See Figure 4 The capacitor module includes a capacitor module box 2, a connecting column, and a capacitor. A connecting column is fixed at the middle of the front end of the capacitor module box 2 for connecting to the capacitor stack busbar 3; the capacitor is encapsulated in the capacitor module box 2, and the capacitor is electrically connected to the connecting column, and the capacitor is electrically connected to the capacitor stack busbar 3 via the connecting column.

[0030] Example 2

[0031] Based on Example 1, a handle 4 is fixedly attached to the front of the capacitor module housing 2. A handle 4 is also fixedly attached to the front of the rectifier / inverter housing 1. If a malfunction occurs in the integrated rectifier / inverter module or the capacitor module, the faulty module can be removed and maintained by simply removing the capacitor stack busbar 3 and then pulling out the handle 4. The bottoms of the rectifier / inverter housing 1 and capacitor module housing 2 can be connected to rails.

[0032] The present utility model adopts a split, modular, integrated design. This design form can increase or decrease the design power of the power unit by modifying the internal configuration of the integrated rectifier and inverter module and increasing or decreasing the number of capacitors in the capacitor module, so that the power unit has strong scalability and consistency. When any module in the power unit fails, the faulty module can be pulled out separately for maintenance after disassembling the capacitor stack busbar 3. Because the weight of a single module is much lighter than the weight of the entire power unit, the disassembly and maintenance of the power unit is convenient.

[0033] Through the above specific embodiments, those skilled in the art can easily implement the present invention. However, it should be understood that the present invention is not limited to the above specific 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 to keep the specification concise, each solution formed by these combinations is not described one by one. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A high-power water-cooled integrated power unit, characterized in that: It includes a rectifier-inverter integrated module, a capacitor module, and a capacitor stacked busbar. The rectifier-inverter integrated module and the capacitor module are electrically connected through the capacitor stacked busbar. The inverter-rectifier integrated module and the capacitor module are both box-type structures. The capacitor module and the rectifier-inverter integrated module are arranged side by side.

2. A high-power water-cooled integrated power unit according to claim 1, characterized in that: The rectifier-inverter integrated module includes a rectifier-inverter box, a water-cooled plate assembly, a drive plate assembly, a composite busbar, a fuse, a transformer assembly, an IGBT module, a temperature-controlled switch, and a rectifier bridge. The water-cooled plate assembly is fixed in the rectifier-inverter box, and the electrical components in the water-cooled plate assembly are electrically connected to the fuse through the composite busbar; the drive plate assembly is fixedly connected to the rectifier-inverter box, and the drive plate assembly is electrically connected to the transformer assembly, IGBT module, temperature-controlled switch, and fuse through cables; the IGBT module, temperature-controlled switch, and rectifier bridge are fixedly connected to the water-cooled plate assembly.

3. A high-power water-cooled integrated power unit according to claim 2, characterized in that: The water cooling plate assembly includes a water inlet, a water outlet, and a water cooling plate. The water cooling plate is fixedly connected to the rectifier bridge, IGBT module, and temperature control switch by bolts. The upper and lower ends of the side of the water cooling plate are respectively connected to the water outlet and the water inlet.

4. A high-power water-cooled integrated power unit according to claim 2, characterized in that: The water cooling plate is assembled and fixed on the lower front end of the rectifier inverter box.

5. The high-power water-cooled integrated power unit according to claim 2, characterized in that: The driving board is assembled and fixed on the upper front end of the rectifier and inverter box.

6. The high-power water-cooled integrated power unit according to claim 2, characterized in that: A handle is fixedly connected to the front end of the rectifier and inverter box.

7. The high-power water-cooled integrated power unit according to claim 1, characterized in that: The capacitor module includes a capacitor module box, a connecting column, and a capacitor. A connecting column is fixed in the middle of the front end of the capacitor module box for connecting to the capacitor stack busbar; the capacitor is encapsulated in the capacitor module box; the capacitor is electrically connected to the capacitor stack busbar through the connecting column.

8. The high-power water-cooled integrated power unit according to claim 7, characterized in that: A handle is fixedly connected to the front end of the capacitor module box.

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