Current conversion unit and uninterrupted power module
By flexibly arranging the specifications of capacitors according to the temperature rise environment in the current conversion unit of the UPS system, the problems of high equipment costs and waste in existing UPS systems are solved, and efficient capacitor adaptation and design flexibility are achieved.
Patent Information
- Application Number
- CN202420604247.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-26
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-03-26
AI Technical Summary
The electronic component layout of the Uninterrupted Power Module (UPM) in existing UPS systems leads to high cost and unnecessary waste of equipment, especially in harsh temperature rise environments.
By abolishing the unified planning of capacitors in the current conversion unit, different specifications of capacitors are arranged according to different temperature rise environments, so that they can adapt to the temperature rise environment they are in, thereby reducing equipment costs and improving design flexibility.
It realizes efficient adaptation of capacitors under different temperature rise environments, reduces equipment costs, and improves design flexibility and heat dissipation effect.
Smart Images
Figure CN222839289U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to power supply equipment, in particular to a current conversion unit and an uninterruptible power module. Background Art
[0002] An uninterruptible power supply (UPS) is a device that provides backup AC power to load equipment to maintain normal operation when the power grid is abnormal. Usually, an uninterruptible power supply is used to maintain the uninterrupted operation of key equipment or precision instruments such as computers or switches to prevent computer data loss, telephone communication network interruption, or instrument loss of control. The data center power supply system is a typical UPS system, which usually uses the main power supply to provide three-phase alternating current (AC) to one or more UPS systems that support critical data center loads. When the main power supply is cut off, the data center UPS can assume the function of supplying power to critical loads.
[0003] A known large or medium-sized UPS power supply system includes a system cabinet, an uninterruptible power module (UPM), a communication module, a display module, etc. The UPM is one of the core units of the entire UPS, including a functional electrical network composed of a variety of power devices. A large number of power devices generate a large amount of heat during operation, and this heat accumulates in the casing of the UPM, which has an adverse effect on the life and operating stability of the device. Although the heat dissipation capacity has been improved, for example, a fan is set for the electrical network of the UPM and an air duct is arranged in the casing, there are still areas where the heat dissipation effect is not ideal, and the temperature rise environment in this area is usually relatively harsh. In order to meet the needs of normal operation under harsh temperature rise environments, certain electronic components in the electrical network of the entire UPM, such as capacitors, are generally planned in a unified manner so that they have unified higher specifications adapted to harsh temperature rise environments. The advantage of such unification is that installation is more convenient, but it causes a substantial increase in costs and waste, because such electronic components are not all arranged under harsh temperature rise conditions.
[0004] Therefore, there is a need in the industry to improve the layout of electronic components of UPM to reduce the cost of the device. Utility Model Content
[0005] The utility model aims to provide a current conversion unit, which can at least solve some of the above technical problems.
[0006] The utility model also aims to provide an uninterruptible power module using the improved current conversion unit.
[0007] According to one aspect of the utility model, a current conversion unit is provided, comprising: a shell; an electrical network, arranged in the shell and configured to convert the received current, wherein the electrical network comprises a plurality of electronic devices; the electrical network has a first temperature rise region and a second temperature rise region during operation, wherein the temperature rise of the first temperature rise region is higher than the temperature rise of the second temperature rise region, an air duct passing through the first temperature rise region and the second temperature rise region is formed in the shell, the plurality of electronic devices comprise a plurality of capacitors arranged along the air duct, wherein a portion of the plurality of capacitors are located in the first temperature rise region, and another portion of the plurality of capacitors are located in the second temperature rise region, wherein the operating parameters of the capacitors located in the second temperature rise region are lower than the operating parameters of the capacitors in the first temperature rise region.
[0008] According to the current conversion unit provided by this solution, the unified planning of capacitors is cancelled, and capacitors of different specifications are arranged according to different temperature rise environments, so that the capacitors are sufficient to adapt to the temperature rise environment and can operate normally, which greatly reduces the cost of the entire unit or even the entire device. In addition, based on different temperature rise environments, the capacitors can also be designed differently, which improves the flexibility of the design.
[0009] In some embodiments, the operating parameters include a maximum operating temperature, wherein the maximum operating temperature of the capacitor in the first temperature rise region is greater than the maximum operating temperature of the capacitor in the second temperature rise region. For example, a 105C capacitor may be selected in the first temperature rise region with a higher temperature rise, and an 85C capacitor may be selected in the second temperature rise region with a lower temperature rise, which can save a lot of cost.
[0010] In some embodiments, the operating parameter includes the diameter of the capacitor, wherein the diameter of the capacitor in the first temperature rise region is greater than the diameter of the capacitor in the second temperature rise region. Changing the diameter of the capacitor will make the volume of the capacitor in the second temperature rise region smaller than the volume of the capacitor in the first temperature rise region, thereby allowing more air volume to be sent to the capacitor in the first temperature rise region and its vicinity along the air duct, which is very helpful to improve the working environment of the capacitor in the first temperature rise region and reduce the overall temperature of the unit.
[0011] In some embodiments, the operating parameters include the height of the capacitor, wherein the height of the capacitor in the first temperature rise region is greater than the height of the capacitor in the second temperature rise region. Similar to the previous solution, changing the height of the capacitor will make the volume of the capacitor in the second temperature rise region smaller than the volume of the capacitor in the first temperature rise region, thereby allowing more air volume to be sent to the capacitor in the first temperature rise region and its vicinity along the air duct, which is very helpful to improve the working environment of the capacitor in the first temperature rise region and reduce the overall temperature of the unit.
[0012] In some embodiments, the air duct has an air inlet end close to the end of the shell and an air outlet end close to the middle of the shell, and the first temperature rise area is closer to the middle of the shell than the second temperature rise area.
[0013] In some embodiments, a plurality of groups of heat sinks are arranged in the housing corresponding to a portion of the electronic components, and the air duct is formed between two adjacent groups of heat sinks.
[0014] In some embodiments, the plurality of electronic devices include an inductor located near or in the first temperature rise region.
[0015] In some embodiments, the capacitor is an electrolytic capacitor or a film capacitor, or a combination of an electrolytic capacitor and a film capacitor.
[0016] In some embodiments, the current conversion module is a rectifier unit for an uninterruptible power module.
[0017] According to another aspect of the utility model, an uninterruptible power module is provided, comprising: a shell; a current conversion unit arranged in the shell, wherein the current conversion unit is the aforementioned current conversion unit; a fan unit connected to the end of the shell and configured to supply air into the shell; wherein the first temperature rise area is farther away from the fan unit than the second temperature rise area, and the air duct has an air inlet end close to the fan unit and an air outlet end away from the fan unit.
[0018] Some of the other features and advantages of the present invention will be apparent to those skilled in the art after reading this application, and the other parts will be described in the following specific embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, wherein:
[0020] Figure 1 It is a schematic diagram of a rectifier unit according to an embodiment of the utility model.
[0021] Description of reference numerals:
[0022] 1-current conversion unit; 11-inductor; 12-heat sink; 13-first capacitor; 14-second capacitor; 15-third capacitor; 16-fourth capacitor; 17-first temperature rise area; 18-second temperature rise area; 19-air duct; 2-fan unit; 3-housing; 31-bottom wall; 32-side wall; 33-end wall DETAILED DESCRIPTION
[0023] Now, with reference to the accompanying drawings, the schematic schemes of the current conversion unit and the uninterruptible power module disclosed in the utility model are described in detail. Although the drawings are provided to present some embodiments of the utility model, the drawings do not have to be drawn according to the dimensions of the specific implementation scheme, and certain features may be enlarged, removed or partially cut to better illustrate and explain the disclosure of the utility model. Some components in the drawings can be adjusted in position according to actual needs without affecting the technical effect. The phrase "in the drawings" or similar terms appearing in the specification do not necessarily refer to all drawings or examples.
[0024] Certain directional terms used to describe the drawings below, such as "inside", "outside", "above", "below" and other directional terms, will be understood to have their normal meanings and refer to those directions involved when the drawings are normally viewed. Unless otherwise specified, the directional terms described in this specification are basically in accordance with the conventional directions understood by those skilled in the art.
[0025] The terms "first", "first", "second", "second" and the like used in the present invention do not indicate any order, quantity or importance, but are used to distinguish one component from other components.
[0026] The utility model aims to provide a current conversion unit, which re-arranges the capacitors in the included electrical network, designs and plans the working parameters (including maximum working temperature, external dimensions, such as diameter and height, etc.) of the capacitors in each area according to different temperature rise areas of the electrical network, so that the working parameters of the capacitors can meet the requirements of normal operation in the temperature rise environment without causing waste. This solution can effectively reduce the cost of the current conversion unit and even the entire device, and can also make the design of the capacitor more flexible, which is also helpful to improve the temperature rise environment of the current conversion unit.
[0027] Another important advantage of the technical solution of the utility model is that it can be adapted to existing equipment without the need for adaptive modification of the equipment.
[0028] The current conversion unit according to the utility model can be, for example, a rectification (AC-DC) unit in a UPM, which can convert alternating current into direct current, or a direct current conversion (DC-DC) unit, which can boost the direct current of the battery to the direct current bus, and can also step down the direct current of the direct current bus to charge the battery in the mains power supply mode, or can be an inverter unit, which can convert direct current into alternating current. In addition, the current conversion unit according to the utility model can also be a combination of a rectification unit and a direct current conversion unit.
[0029] In one embodiment, the UPM includes a housing, and the above-mentioned electronic components that implement the current conversion function are enclosed in the housing. In order to achieve heat dissipation, a fan unit is provided at the end of the housing. The housing is a three-dimensional body made of a solid material, which provides protection for each component. The input port of the UPM can be accessed from the outside of the housing, so that the UPM can be selectively connected to a first power source (or "main power source", such as a three-phase AC power source, such as a mains power source) or a second power source (or "backup power source", such as a DC battery). The output port of the UPM can also be accessed from the outside of the housing, so that a load can be connected to the UPM at the output port. The UPM generates AC power for the load based on the current from the main power source or the backup power source.
[0030] The rectifier unit, DC conversion unit, inverter unit and fan unit are the divisions of the UPM according to the functional areas. Each of these units can be a module of modular design, and the UPM is formed after the modules are assembled together. The assembled UPM can also be disassembled to restore the modules. Of course, the rectifier unit and the DC conversion unit can also be designed together to meet the needs of compactness and miniaturization. In this case, each unit can include a housing and electronic devices arranged on the housing, and the housings of each unit can be combined to construct the entire housing of the UPM.
[0031] Figure 1 An example of a current conversion unit 1 is shown, which combines a rectifier unit and a DC conversion unit. As shown in the figure, the current conversion unit 1 includes a housing 3 and an electrical network (or "circuit") arranged in the housing 3, the electrical network being configured to selectively connect to a main power supply or a backup power supply through the aforementioned input port, and converting the AC power provided by the main power supply or the DC power provided by the backup power supply into a DC power provided to the inverter unit. The selective connection can be automatically realized, for example, by preset conditions.
[0032] As mentioned above, the housing 3 can be the housing of the modular current conversion unit 1 itself, and the electronic devices constituting the electrical network are integrated on the housing 3. The housing 3 includes a bottom wall 31, two side walls 32 connected to opposite sides of the bottom wall 31, and an end wall 33 connecting the bottom wall 31 and the two side walls 32. The end wall 33 can be used to install the aforementioned input port. The fan unit 2 is connected to the other end of the housing 3 opposite to the end wall 33, and is used to supply air into the housing 3.
[0033] The electrical network constituting the current conversion unit 1 includes a plurality of electronic devices for realizing its functions, such as relays, bus capacitors, inductors, semiconductor power devices (such as IGBT modules), etc. When the current conversion unit 1 is in operation, many electronic devices in the electrical network will emit a large amount of heat. If this heat accumulates in the housing 3, it will have an adverse effect on the operation and life of the electronic devices. For this reason, a heat dissipation structure is arranged for the current conversion unit 1. For example, Figure 1 As shown, multiple groups of heat sinks 12 are provided for semiconductor power devices. The heat sinks 12 in each group are arranged in parallel to each other to quickly conduct the heat emitted by the semiconductor power device. A channel can be constructed between two adjacent groups of heat sinks 12, which leads to the fan unit 2, so that the wind sent by the fan unit 2 can be sent into the interior of the housing 3 through the channel as shown by the arrow. Here, the channel is also referred to as an "air duct". A group of busbar capacitors is installed in the air duct 19. In the embodiment shown, this group of busbar capacitors includes a first capacitor 13, a second capacitor 14, a third capacitor 15 and a fourth capacitor 16 arranged in sequence from the air inlet end of the air duct 19 close to the fan unit 2 to the air outlet end away from the fan unit 2. Of course, the number of groups of busbar capacitors in the air duct 19 and the number of single-group busbar capacitors can also be adjusted as needed. The busbar capacitor can be an electrolytic capacitor, or a film capacitor, or a mix of electrolytic capacitors and film capacitors. Figure 1 The DC bus capacitor is shown in FIG.
[0034] The heat sink 12 can conduct heat, which means that it also generates heat. In addition to the semiconductor power devices, the multiple inductors 11 installed near the heat sink 12 are also one of the electronic devices with high heat generation in the current conversion unit 1. Figure 1 The first temperature rise area 17 and the second temperature rise area 18 formed by heat accumulation during operation of the electrical network are marked with red double-dotted lines. Obviously, the first temperature rise area 17 (also the area near the middle of the housing 3) far away from the fan unit 2 in the housing 3 is surrounded by the heat sink 12 and the inductor 11, and its temperature rise environment is more severe than the temperature rise environment of the second temperature rise area 18 (also the area near the end of the housing 3) near the fan unit 2 in the housing 3. After testing under the same conditions, the temperature rise of the first temperature rise area 17 is significantly higher than the temperature rise of the second temperature rise area 18.
[0035] The air duct 19 basically extends through the first temperature rise area 17 and the second temperature rise area 18. Among the busbar capacitors arranged therein, a part of the busbar capacitors must be in the first temperature rise area 17, and another part of the busbar capacitors is in the second temperature rise area 18. In the illustrated embodiment, the first capacitor 13 and the second capacitor 14 are in the second temperature rise area 18, facing a better temperature rise environment, while the third capacitor 15 and the fourth capacitor 16 are in the first temperature rise area 17, facing a relatively harsh temperature rise environment. For different temperature rise environments, different working parameters can be configured for the first capacitor 13, the second capacitor 14, the third capacitor 15 and the fourth capacitor 16, so as to avoid waste caused by redundant working parameters while meeting the normal working requirements of the busbar capacitors. The working parameters may include the maximum operating temperature, the outer dimensions of the capacitor (diameter, height / axial length), etc. In the same current conversion unit 1, for capacitors in different temperature rise areas, the adjustment of these working parameters can be considered individually or in combination.
[0036] For example:
[0037] In one embodiment, the first capacitor 13 and the second capacitor 14 located in the second temperature rise region 18 are configured as capacitors with a maximum operating temperature of 85° C., and the third capacitor 15 and the fourth capacitor 16 located in the first temperature rise region 17 are configured as capacitors with a maximum operating temperature of 105° C. In addition, the outer dimensions of the first capacitor 13 and the second capacitor 14 may be the same as the outer dimensions of the third capacitor 15 and the fourth capacitor 16.
[0038] In another embodiment, the first capacitor 13 and the second capacitor 14 located in the second temperature rise region 18 are configured as capacitors with a diameter of D1, and the third capacitor 15 and the fourth capacitor 16 located in the first temperature rise region 17 are configured as capacitors with a diameter of D2, wherein D1<D2. In addition, the maximum operating temperature of the first capacitor 13 and the second capacitor 14 may also be less than the maximum operating temperature of the third capacitor 15 and the fourth capacitor 16, for example, the maximum operating temperature of the first capacitor 13 and the second capacitor 14 is 85°C, while the maximum operating temperature of the third capacitor 15 and the fourth capacitor 16 is 105°C.
[0039] In another embodiment, the first capacitor 13 and the second capacitor 14 located in the second temperature rise region 18 are configured as capacitors with a height of H1, and the third capacitor 15 and the fourth capacitor 16 located in the first temperature rise region 17 are configured as capacitors with a height of H2, wherein H1<H2. In addition, the maximum operating temperature of the first capacitor 13 and the second capacitor 14 may also be less than the maximum operating temperature of the third capacitor 15 and the fourth capacitor 16, for example, the maximum operating temperature of the first capacitor 13 and the second capacitor 14 is 85°C, while the maximum operating temperature of the third capacitor 15 and the fourth capacitor 16 is 105°C.
[0040] In yet another embodiment, all operating parameters of the first capacitor 13 and the second capacitor 14 are smaller than operating parameters of the third capacitor 15 and the fourth capacitor 16 .
[0041] In another embodiment, the first capacitor 13 and the second capacitor 14 located in the second temperature rise region 18 are configured as capacitors with a diameter of D1, and the third capacitor 15 and the fourth capacitor 16 located in the first temperature rise region 17 are configured as capacitors with a diameter of D2, wherein D1<D2. In addition, the maximum operating temperature of the first capacitor 13 and the second capacitor 14 can be equal to the maximum operating temperature of the third capacitor 15 and the fourth capacitor 16, for example, both have a maximum operating temperature of 105°C.
[0042] In another embodiment, the first capacitor 13 and the second capacitor 14 located in the second temperature rise region 18 are configured as capacitors with a height of H1, and the third capacitor 15 and the fourth capacitor 16 located in the first temperature rise region 17 are configured as capacitors with a height of H2, wherein H1<H2. In addition, the maximum operating temperature of the first capacitor 13 and the second capacitor 14 can be equal to the maximum operating temperature of the third capacitor 15 and the fourth capacitor 16, for example, both are 105°C.
[0043] In another embodiment, the maximum operating temperature of the first capacitor 13 and the second capacitor 14 is equal to the maximum operating temperature of the third capacitor 15 and the fourth capacitor 16, for example, both are 105°C, but the height and diameter of the first capacitor 13 and the second capacitor 14 are smaller than the height and diameter of the third capacitor 15 and the fourth capacitor 16.
[0044] Placing capacitors with smaller sizes near the air inlet end of the air duct 19 can allow more air to be delivered through the air duct 19 to capacitors that are located further back and in a harsh temperature rise environment, which helps to dissipate heat in these harsh temperature rise environments and improves the heat dissipation effect near the middle area of the casing 3.
[0045] Although the figure only shows an embodiment of the current conversion unit 1 which combines a rectification unit and a DC conversion unit, those skilled in the art will understand that this layout method of flexibly arranging capacitors with different operating parameters according to different temperature rise environments can be applied to other types of current conversion units, such as inverter units.
[0046] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.
[0047] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes, modifications and combinations made by any technician in the field without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.
Claims
1. A current conversion unit, comprising: Housing (3); an electrical network arranged in the housing (3) and configured to convert the received electric current, wherein the electrical network comprises a plurality of electronic devices; The invention is characterized in that the electrical network has a first temperature rise area (17) and a second temperature rise area (18) during operation, wherein the temperature rise of the first temperature rise area (17) is higher than the temperature rise of the second temperature rise area (18), an air duct passing through the first temperature rise area (17) and the second temperature rise area (18) is formed in the housing (3), and the multiple electronic devices include multiple capacitors arranged along the air duct, wherein a part of the multiple capacitors are located in the first temperature rise area (17), and another part of the multiple capacitors are located in the second temperature rise area (18), wherein the working parameters of the capacitors located in the second temperature rise area (18) are lower than the working parameters of the capacitors in the first temperature rise area (17).
2. The current conversion unit according to claim 1, characterized in that: The operating parameters include a maximum operating temperature, wherein the maximum operating temperature of the capacitor in the first temperature rise region (17) is greater than the maximum operating temperature of the capacitor in the second temperature rise region (18).
3. The current conversion unit according to claim 1, characterized in that: The operating parameter includes a diameter of a capacitor, wherein the diameter of the capacitor in the first temperature rise region (17) is greater than the diameter of the capacitor in the second temperature rise region (18).
4. The current conversion unit according to claim 1, characterized in that: The operating parameter includes the height of the capacitor, wherein the height of the capacitor in the first temperature rise region (17) is greater than the height of the capacitor in the second temperature rise region (18).
5. The current conversion unit according to any one of claims 1 to 4, characterized in that: The air duct has an air inlet end close to the end of the outer shell (3) and an air outlet end close to the middle of the outer shell (3), and the first temperature rise area (17) is closer to the middle of the outer shell (3) than the second temperature rise area (18).
6. The current conversion unit according to any one of claims 1 to 4, characterized in that: A plurality of groups of heat sinks (12) are arranged in the housing (3) corresponding to a portion of electronic components, and the air duct is formed between two adjacent groups of heat sinks (12).
7. The current conversion unit according to any one of claims 1 to 4, characterized in that: The plurality of electronic devices include an inductor (11) located close to or in the first temperature rise area (17).
8. The current conversion unit according to any one of claims 1 to 4, characterized in that: The capacitor is an electrolytic capacitor or a film capacitor, or a combination of an electrolytic capacitor and a film capacitor.
9. The current conversion unit according to any one of claims 1 to 4, characterized in that: The current conversion module is a rectifier unit (1) used for an uninterruptible power module.
10. An uninterruptible power module, characterized in that: include: shell; A current conversion unit, arranged in the housing, wherein the current conversion unit is the current conversion unit according to any one of claims 1 to 9; a fan unit (2) connected to an end of the housing and configured to supply air into the housing; The first temperature rise region (17) in the current conversion unit is further away from the fan unit (2) than the second temperature rise region (18), and the air duct has an air inlet end close to the fan unit (2) and an air outlet end far away from the fan unit (2).