Complete machine of frequency converter adopting liquid cooling heat dissipation

Abstract

The utility model discloses a frequency converter complete machine adopting liquid cooling heat dissipation, and belongs to the technical field of frequency converters. Comprising a power unit cabinet, a plurality of power assemblies are arranged in the power unit cabinet along a first direction, and an accommodating space is arranged between adjacent power assemblies; a liquid cooling heat dissipation mechanism is also arranged in the power assembly, and comprises a main water inlet pipe which is arranged at the front end of the power assembly along a first direction; the water inlet branch assemblies are connected with the main water inlet pipe, the first water inlet branch assembly is located on the side, away from the containing space, of the first power assembly, and the other water inlet branch assemblies are located in the containing space; the main water outlet pipe is arranged at the rear end of the power assembly in the first direction; the water outlet branch assemblies are connected with the main water outlet pipe, the first water outlet branch assembly is located on the side, away from the containing space, of the first power assembly, and the other water outlet branch assemblies are located in the containing space. The beneficial effects are that a liquid cooling heat dissipation mode is adopted, the heat dissipation effect is good, the cost is low, the size and the occupied area of the frequency converter are reduced, and the whole frequency converter can operate reliably.

Description

Technical Field

[0001] This utility model relates to the field of frequency converter technology, and in particular to a complete frequency converter. Background Technology

[0002] Currently, domestic motor manufacturers are focusing on expanding the application of ultra-large capacity motors with power exceeding 20 MW. In large-scale industrial transformation, they are actively promoting large-scale vehicle-to-electricity and gas-to-electricity conversion projects, transforming traditional energy-driven methods into electric drives to improve energy efficiency. In the energy storage field, they are leveraging ultra-large capacity motors to support the development of compressed air energy storage technology, enhancing energy storage and distribution capabilities. In steam turbine applications, they are committed to recovering residual energy from steam turbines, converting potentially wasted energy into reusable electrical resources. Currently, cascaded high-voltage frequency converters on the market consist of a control cabinet, phase-shifting transformer cabinet, power unit cabinet, and incoming / outgoing line cabinets. The power unit cabinet, due to significant energy loss during electrical energy conversion, causes the temperature of components and equipment to rise, requiring heat dissipation.

[0003] In existing technologies, most heat dissipation methods employ forced air cooling, which has numerous drawbacks for products with a single unit capacity of 20MVA or higher. Due to the significant losses in power devices such as IGBTs (Insulated Gate Bipolar Transistors), the heat flux density in the thermal loop increases, leading to a greater temperature rise for the same thermal resistance and impacting the lifespan of the power devices. If air cooling continues to be used, the thickness of the heat sink substrate and the height of the fins must be increased to enhance heat sink capacity and convection heat transfer area. This results in a substantial increase in the size of the air-cooled heat sink, leading to a larger footprint for the power unit cabinet and raising customer operating costs. Utility Model Content

[0004] The purpose of this utility model is to provide a complete inverter that uses liquid cooling to solve the above-mentioned technical problems;

[0005] A frequency converter unit employing liquid cooling includes,

[0006] A power unit cabinet, wherein multiple power components are arranged inside the power unit cabinet along a first direction, and an accommodating space is provided between adjacent power components;

[0007] The power unit cabinet is also equipped with a liquid cooling heat dissipation mechanism, which includes...

[0008] The main water inlet pipe is located at the front end of the power component along the first direction;

[0009] Multiple water inlet branch components are connected to the main water inlet pipe. The first water inlet branch component is located on the side of the first power component away from the accommodating space, and the remaining water inlet branch components are located within the corresponding accommodating space.

[0010] The main water outlet pipe is located at the rear end of the power component along the first direction;

[0011] Multiple water outlet branch components are connected to the main water outlet pipe. The first water outlet branch component is located on the side of the first power component away from the accommodating space, and the remaining water outlet branch components are located within the corresponding accommodating space.

[0012] Preferably, the power component includes a plurality of power units arranged along the second direction;

[0013] The water inlet branch assembly includes multiple branch water inlet pipes, and each branch water inlet pipe is connected to one of the power units.

[0014] The second direction is perpendicular to the first direction.

[0015] Preferably, the water outlet branch assembly includes multiple branch water outlet pipes, and each branch water outlet pipe is connected to one power unit.

[0016] Preferably, a water receiving tray is provided below the main water outlet pipe along the first direction.

[0017] Preferably, the accommodating space is further provided with a cable for connecting the power component.

[0018] Preferably, the top of the inverter is provided with a stainless steel plate, and the stainless steel plate is provided with a cable inlet hole, and one cable inlet hole is connected to one cable.

[0019] Preferably, the inlet hole is provided with a gland.

[0020] Preferably, it also includes a control cabinet, located on one side of the power unit cabinet;

[0021] The outgoing line cabinet is located on the other side of the power unit cabinet.

[0022] Preferably, the top of the inverter unit is also provided with welding lifting points for hoisting and handling.

[0023] Preferably, the bottom of the inverter is provided with an integrated base.

[0024] The beneficial effects of this utility model are: the inverter adopts liquid cooling, which has good heat dissipation effect and low cost. While reducing the size and floor space of the inverter, the inverter can operate reliably. Attached Figure Description

[0025] Figure 1 This is a front view of the complete inverter unit of this utility model;

[0026] Figure 2This is an isometric side view of the complete inverter unit of this utility model;

[0027] Figure 3 yes Figure 2 A magnified view of a section at point M;

[0028] Figure 4 yes Figure 2 A magnified view of a portion of point N in the middle;

[0029] Figure 5 This is a front view of the inverter unit of this utility model with the front frame removed;

[0030] Figure 6 This is a front view of the power unit cabinet of this utility model with the overall frame removed;

[0031] Figure 7 This is a rear view of the power unit cabinet of this utility model with the overall frame removed.

[0032] In the attached diagram: 1. Power unit cabinet; 2. Power assembly; 3. Power unit; 31. Main water inlet pipe; 32. Water inlet branch assembly; 321. Branch water inlet pipe; 33. Main water outlet pipe; 34. Water outlet branch assembly; 341. Branch water outlet pipe; 4. Water receiving tray; 5. Cable; 6. Stainless steel plate; 7. Gland connector; 8. Control cabinet; 9. Outlet cabinet; 10. Welding suspension point; 11. Integrated base; 12. Channel steel. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0036] A type of frequency converter that uses liquid cooling, such as Figure 1 , Figure 5 , Figure 6 As shown, including,

[0037] A power unit cabinet 1 is provided with a plurality of power components 2 arranged along a first direction, and an accommodating space is provided between adjacent power components 2.

[0038] The power unit cabinet 1 is also equipped with a liquid cooling heat dissipation mechanism, which includes,

[0039] The main water inlet pipe 31 is located at the front end of the power component 2 along the first direction;

[0040] Multiple water inlet branch components 32 are connected to the main water inlet pipe 31. The first water inlet branch component 32 is located on the side of the first power component 2 away from the accommodating space, and the remaining water inlet branch components 32 are located in the corresponding accommodating space.

[0041] The main water outlet pipe 33 is located at the rear end of the power component 2 along the first direction;

[0042] Multiple water outlet branch components 34 are connected to the main water outlet pipe 33. The first water outlet branch component 34 is located on the side of the first power component 2 away from the accommodating space, and the remaining water outlet branch components 34 are located in the corresponding accommodating space.

[0043] Specifically, this utility model provides a liquid-cooled inverter unit with a single unit capacity of 20MVA or more. By using a liquid-cooled heat dissipation mechanism, the high-voltage inverter with a single unit capacity of more than 20MVA can operate reliably, and the size and footprint of the inverter are reduced, resulting in low cost.

[0044] In a preferred embodiment, the power component 2 includes a plurality of power units 3 arranged along a second direction;

[0045] The water inlet branch assembly 32 includes multiple branch water inlet pipes 321, and each branch water inlet pipe 321 is connected to a power unit 3.

[0046] The second direction is perpendicular to the first direction.

[0047] Specifically, multiple power components 2 are provided in the first direction indicated by arrow A, and power units 3 are provided in the power components 2 in the second direction indicated by arrow B.

[0048] Reference Figure 5 After removing the front frame of the inverter, you can see that the power unit cabinet 1 has 4 power components 2 arranged in the first direction, and each power component 2 has 3 power units 3 arranged in the second direction, so there are a total of 12 power units 3.

[0049] To reduce the overall size and footprint of the ultra-high power frequency converter and improve heat dissipation efficiency, the frequency converter adopts liquid cooling.

[0050] Reference Figure 6 The main water inlet pipe 31 has four sets of water inlet branch components 32, each set of water inlet branch components 32 has 3 branch water inlet pipes 321, and each branch water inlet pipe 321 is connected to a power unit 3.

[0051] In a preferred embodiment, the water outlet branch assembly 34 includes a plurality of branch water outlet pipes 341, and each branch water outlet pipe 341 is connected to a power unit 3.

[0052] Specifically, the main water outlet pipe 33 has four sets of water outlet branch assembly 34, each set of water outlet branch assembly 34 has 3 branch water outlet pipes 341, and each branch water outlet pipe 341 is connected to a power unit 3.

[0053] In a preferred embodiment, referencing Figure 7 A water receiving tray 4 is provided below the main water outlet pipe 33 along the first direction.

[0054] Specifically, since the area below the main outlet pipe 33 is a live conductor, a water receiving tray 4 is installed on the lower side of the outlet pipe to avoid electrical risks caused by leakage and improve the safety factor of the liquid cooling equipment.

[0055] The water tray 4 features a segmented design, making it easier to detect and locate leaks in the event of a leak. Different segments correspond to different areas, and by observing whether liquid accumulates in each segment, it is possible to quickly determine which part of the main outlet pipe 33 is leaking.

[0056] For example, if coolant accumulates in a certain section of the water tray 4, technicians can quickly focus their inspection on the corresponding main water outlet pipe 33 area, reducing troubleshooting time and workload.

[0057] The segmented water tray 4 makes cleaning and maintenance easier.

[0058] In a preferred embodiment, referencing Figure 3 , Figure 7 The accommodating space is also equipped with a cable 5 for connecting the power component 2;

[0059] The top of the inverter is equipped with a stainless steel plate 6, and the stainless steel plate 6 has a cable inlet hole, with one cable inlet hole corresponding to one cable 5.

[0060] The cable inlet is equipped with a gland 7.

[0061] Specifically, the input cable 5 is inserted into the narrow space on both sides of each power unit 3, ensuring that the inverter has a small footprint. The method of entering the cable from both sides of the power unit 3 also greatly reduces the size of the inverter and lowers the procurement cost of structural materials.

[0062] To ensure the safety of cable laying on site, the frequency converter adopts a top-entry wiring method.

[0063] A stainless steel plate 6 is welded to the top of the cabinet, with a number of cable entry holes. Each cable entry hole is fitted with a nylon gland 7. Due to the material properties of the stainless steel plate 6, it does not create eddy currents, thus preventing the risk of eddy currents forming around the cable 5 and heating it, potentially burning it. The nylon gland 7 serves to secure the cable 5, prevent dust and water damage, ensuring the high-voltage frequency converter achieves its IP31 protection rating and mitigating the risks of eddy current effects.

[0064] In a preferred embodiment, referencing Figure 1 , Figure 2 , Figure 5 It also includes a control cabinet 8, which is located on one side of the power unit cabinet 1;

[0065] Outgoing line cabinet 9 is located on the other side of power unit cabinet 1.

[0066] Specifically, the ultra-high power high voltage frequency converter of this utility model (excluding the phase-shifting transformer cabinet) consists of a control cabinet 8, a power unit cabinet 1, and an outgoing line cabinet 9 from left to right. It is a 50MVA ultra-high power high voltage frequency converter structure that meets the needs of electrification of ultra-high capacity drive devices and utilization of surplus energy.

[0067] The inlet of the main water inlet pipe 31 is located in the outlet cabinet 9, and the outlet of the main water outlet pipe 33 is located in the outlet cabinet 9. The centralized inlet and outlet facilitate the management and monitoring of the entire inverter's water circulation system. In the event of water circulation problems (such as poor water flow or leakage), the problem can be located and resolved more quickly.

[0068] Technicians can focus their inspections on the inlet and outlet water conditions near the outlet cabinet 9, making it easier to determine whether the entire water circulation system is operating normally and facilitating timely maintenance and adjustments.

[0069] In a preferred embodiment, referencing Figure 4 The top of the inverter unit is equipped with welding lifting points 10 for hoisting and handling; the bottom of the inverter unit is equipped with an integrated base 11.

[0070] Specifically, the entire inverter shares a single inverter base, namely an integrated base 11. A hoisting channel steel 12 of the same length as the inverter cabinet is installed at the front and back of the top of the inverter cabinet. Welding points 10 are welded onto the channel steel 12. By using a single inverter base and an integrated hoisting method, the inverter can be easily hoisted and transported when it arrives at the customer's location. Moreover, when the inverter is in place, there is no need to adjust the position of each cabinet, which shortens the time required for transportation and placement and reduces the cost of product installation and maintenance.

[0071] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A frequency converter assembly employing liquid cooling, characterized in that, include, A power unit cabinet, wherein multiple power components are arranged inside the power unit cabinet along a first direction, and an accommodating space is provided between adjacent power components; The power unit cabinet is also equipped with a liquid cooling heat dissipation mechanism, which includes... The main water inlet pipe is located at the front end of the power component along the first direction; Multiple water inlet branch components are connected to the main water inlet pipe. The first water inlet branch component is located on the side of the first power component away from the accommodating space, and the remaining water inlet branch components are located within the corresponding accommodating space. The main water outlet pipe is located at the rear end of the power component along the first direction; Multiple water outlet branch components are connected to the main water outlet pipe. The first water outlet branch component is located on the side of the first power component away from the accommodating space, and the remaining water outlet branch components are located within the corresponding accommodating space.

2. The inverter unit with liquid cooling as described in claim 1, characterized in that, The power component includes a plurality of power units arranged along the second direction; The water inlet branch assembly includes multiple branch water inlet pipes, and one branch water inlet pipe is connected to one power unit. The second direction is perpendicular to the first direction.

3. The inverter unit with liquid cooling as described in claim 2, characterized in that, The water outlet branch assembly includes multiple branch water outlet pipes, and each branch water outlet pipe is connected to one of the power units.

4. The inverter unit employing liquid cooling as described in claim 1, characterized in that, A water receiving tray is provided below the main water outlet pipe along the first direction.

5. The inverter unit employing liquid cooling as described in claim 1, characterized in that, The accommodating space is also equipped with cables that connect to the power components.

6. The inverter unit employing liquid cooling as described in claim 5, characterized in that, The top of the inverter is provided with a stainless steel plate, and the stainless steel plate is provided with a cable inlet hole, and one cable inlet hole is connected to one cable.

7. The inverter unit employing liquid cooling as described in claim 6, characterized in that, The inlet hole is equipped with a gland.

8. The inverter unit with liquid cooling as described in claim 1, characterized in that, It also includes a control cabinet, located on one side of the power unit cabinet; The outgoing line cabinet is located on the other side of the power unit cabinet.

9. The inverter unit employing liquid cooling as described in claim 6, characterized in that, The top of the inverter unit is also equipped with welding lifting points for hoisting and handling.

10. The inverter unit employing liquid cooling for heat dissipation according to claim 1, characterized in that, The inverter unit has an integrated base at its bottom.

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