An SCR component, a bypass component and an uninterruptible power supply

Abstract

The present invention discloses an SCR component, a bypass component and an uninterruptible power supply. The SCR component includes two identical SCR modules. Each SCR module includes two SCRs. The anodic ends of the two SCRs are connected in parallel to form a first connection port of the SCR module, and the cathodic ends of the two SCRs are connected in parallel to form a second connection port of the SCR module. The first connection port of each SCR module is electrically connected to the second connection port of the other SCR module. The bypass component includes the above-mentioned bypass component. The above-mentioned bypass component is provided on the bypass of the uninterruptible power supply. The SCR component, bypass component and uninterruptible power supply of the present invention can be applied to an expanded UPS, effectively avoid uneven current distribution in the bypass during engineering applications, and are convenient to maintain.

Description

Technical Field

[0001] The present invention relates to the field of switching devices, and particularly to an SCR component, a bypass component, and an uninterruptible power supply. Background Art

[0002] As the power stability requirements of various electrical devices are getting higher and higher, the application of UPS (Uninterruptible Power Supply) is becoming more and more widespread. In order to improve the reliability of power supply, the current uninterruptible power supply (UPS) usually configures two power supply circuits, namely the main circuit and the bypass circuit. The main circuit supplies power through the commercial power or supplies power through the energy storage unit (such as a storage battery) when the commercial power fails. The bypass is connected to the standby power supply (such as other commercial power supplies or generator power generation), and supplies power through the standby power supply when the main circuit fails.

[0003] Generally speaking, the bypass of the UPS usually uses a bidirectional SCR module as shown in Figure 1a The internal of the bidirectional SCR module contains two SCRs connected in reverse parallel. When the AC input is in the positive half cycle and the negative half cycle respectively, the loop conduction is realized by these two internal SCRs respectively.

[0004] With the increase of the power demand of the UPS, the over-current level of the bypass also needs to be improved. Therefore, the common practice in this field is to connect multiple bidirectional SCR modules in parallel so that the SCRs in the same direction in each module can share the current with each other, as shown in Figure 1b However, in actual applications, after connecting multiple bidirectional SCR modules in parallel as described above, it is difficult to achieve uniform current sharing among the SCR tubes used for current shunting in each bidirectional SCR module, and uneven current sharing is likely to occur on the bypass. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above-mentioned defects or problems existing in the background art, and provide an SCR component, a bypass component, and an uninterruptible power supply, which can be applied to the expanded UPS and effectively avoid uneven current sharing on the bypass in engineering applications.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] Technical solution one: An SCR component includes two identical SCR modules. Each SCR module includes a housing and two SCRs located inside the housing. The anodic ends of the two SCRs are connected in parallel to form the first connection port of the SCR module, and the cathodic ends of the two SCRs are connected in parallel to form the second connection port of the SCR module. The first connection port and the second connection port of each SCR module are both embedded in the outer wall of the housing. The first connection port of each SCR module is electrically connected to the second connection port of the other SCR module. One of the first connection port and the second connection port is the input port of the SCR module, and the other is the output port of the SCR module.

[0008] The present invention also provides a bypass component, hereinafter referred to as technical solution two, which includes a first box body, a second box body, and three SCR components as described in technical solution one. The first box body and the second box body are arranged side by side along a first direction, and the first direction is the height direction of the first box body and the second box body. Inside the first box body, three SCR modules respectively for accessing A-phase input electricity, B-phase input electricity, and C-phase input electricity are placed along a second direction perpendicular to the first direction, and the first connection ports and the second connection ports of the three SCR modules both extend out of the first box body. Inside the second box body, three SCR modules respectively for accessing A-phase output electricity, B-phase output electricity, and C-phase output electricity are placed along the second direction, and the first connection ports and the second connection ports of the three SCR modules both extend out of the second box body. The two SCR modules closest to each other in the first box body and the second box body form the SCR component. The first connection ports and the second connection ports of each SCR module are arranged along the second direction. The first connection port of each SCR module in the first box body is connected to the second connection port of the closest SCR module in the second box body through a first copper bar, and the second connection port of each SCR module in the first box body is connected to the first connection port of the closest SCR module in the second box body through a second copper bar.

[0009] Based on technical solution two, there is also technical solution three. In technical solution three, the first copper bar is composed of several first segments extending along the first direction and several second segments extending along the second direction. The second copper bar extends along a third direction, and the third direction intersects the first direction at an acute angle. The projections of the connection ports extending out of the first box body and the connection ports extending out of the second box body along the first direction overlap one by one.

[0010] Based on Technical Solution Three, there is also a Technical Solution Four. In Technical Solution Four, the three SCR modules placed in the first box body are respectively connected to the A-phase input power, B-phase input power, and C-phase input power through three input copper bars; the three SCR modules placed in the second box body are respectively connected to the A-phase output power, B-phase output power, and C-phase output power through three output copper bars; the input copper bars extend along the second direction, and the three input copper bars are arranged at intervals along the second direction; the output copper bars are L-shaped, which includes a third section extending along the first direction and a fourth section extending along the second direction, and the fourth sections of the three output copper bars are arranged at intervals along the first direction.

[0011] The present invention also provides an uninterruptible power supply, hereinafter referred to as Technical Solution Five, and a bypass component as described in any one of Technical Solutions Two to Four is provided on its bypass.

[0012] From the above description of the present invention, it can be seen that compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. In Technical Solution One, the SCR component includes two identical SCR modules. The first connection port of each SCR module is connected to the second connection port of another SCR module, so that the two SCR modules form a reverse parallel connection in topology; each SCR module includes two SCRs. The anodes of the two SCRs are connected in parallel to form the first connection port of the SCR module, and the cathodes of the two SCRs are connected in parallel to form the second connection port of the SCR module, so that each SCR module includes two SCRs connected in parallel in the same direction in topology. When the mains power is in the positive half cycle, the current passes through one of the SCR modules, and when the mains power is in the negative half cycle, the current passes through the other SCR module. The two SCRs can share the large current, which is beneficial to the expansion of the UPS.

[0014] The inventor found that in the prior art in actual engineering, the two SCRs connected in parallel in the same direction for sharing current are actually located in two different housing packages (i.e., in two bidirectional SCR modules respectively). Therefore, between the actual current splitting point and the actual current converging point of the above two SCRs, there are not only the internal lines of the package, but also the external lines between different packages. Therefore, it is difficult to ensure the consistency of the line impedance between these two SCRs, and it is also difficult to achieve current sharing.

[0015] When the above solution of the present invention is applied in actual engineering, the two SCRs connected in parallel in the same direction for sharing the positive half-cycle current or the negative half-cycle current are both located in the same housing package. That is, the circuit between the actual current shunting point and the actual current converging point of the two SCRs only includes the internal circuit of the housing package. Since the internal circuit impedances of the components within the same housing package can be relatively easily kept consistent (in fact, the internal circuit impedances are configured to be consistent when the device packages leave the factory), this enables the circuit impedance between the two SCRs connected in parallel in the same direction for sharing the current in this solution to be actually kept consistent, thus enabling current sharing for the entire SCR assembly.

[0016] Moreover, the key to the above solution of the present invention lies in that the maintainability of the SCR module can still be maintained while achieving current sharing.

[0017] Specifically, as Figure 2 shown, it is a process solution proposed by the inventor in the process of solving the problems of the prior art. It includes two SCR modules with different specifications (the directions of the internal SCRs are different), namely the first SCR module 10 and the second SCR module 20, each of which contains two SCRs connected in parallel in the same direction, the first SCR and the second SCR. The first SCR module 10 and the second SCR module 20 can be responsible for the current conduction in the positive half-cycle and the negative half-cycle respectively. It is not difficult to see that the similarity between this process solution and this solution is that the two SCRs connected in parallel in the same direction for sharing the current are located in the same housing package, so it can also solve the above current sharing problem. However, its defect lies in that two SCR modules with different specifications are adopted. Therefore, at the customer maintenance site, it is necessary to first distinguish these two different SCR modules to ensure the correspondence and correctness of the connection between the SCR module and the internal wiring of the UPS, and arbitrary assembly of the SCR module cannot be achieved, reducing the maintenance efficiency and maintenance safety.

[0018] The solution of the present invention adopts two identical SCR modules. By configuring the wiring outside the SCR module, on the basis of being able to achieve the circuit topology principle, not only the current sharing problem is solved, but also arbitrary assembly of the SCR module can be achieved when the customer maintains the SCR assembly.

[0019] It can be seen that although the solution of the present invention reduces the wiring convenience on the manufacturer side to a certain extent, it effectively improves the maintenance efficiency and maintenance safety on the customer side, and overall still better enhances the market competitiveness of the UPS product.

[0020] 2. In Technical Solution 2, the present invention also provides a bypass component, which includes the above-mentioned SCR component and has the same technical advantages as the above solution. The two SCR modules closest to each other in the first box body and the second box body form the SCR component. The first connection port of each SCR module in the first box body is connected to the second connection port of the closest SCR module in the second box body through the first copper bar, and the second connection port of each SCR module in the first box body is connected to the first connection port of the closest SCR module in the second box body through the second copper bar, which is convenient for wiring, not prone to wiring errors, and the copper bar can withstand a larger current compared to the cable, ensuring the stability of the bypass component. The first box body and the second box body are arranged side by side along the first direction, so that the three-phase input line and the three-phase output line are also arranged side by side along the first direction, which is convenient for wiring and reducing the width of the chassis, and compared with Figure 2 the solution of

[0021] 3. In Technical Solution 3, the projections of the connection ports extending from the first box body and the connection ports extending from the second box body along the first direction overlap one by one, ensuring the shortest distance between the connection ports on the first box body and the connection ports on the second box body, and thus also making the first copper bar and the second copper bar have relatively short lengths. The structural settings of the first copper bar and the second copper bar are not only easy for wiring, but also arranged regularly and more beautifully.

[0022] 4. In Technical Solution 4, the structural settings of the input copper bar and the output copper bar are easy for wiring and are arranged regularly and beautifully.

[0023] 5. In Technical Solution 5, the present invention also provides an uninterruptible power supply, on the bypass of which the above-mentioned bypass component is provided, having the same technical effects as the above technical solutions. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1a is a bidirectional SCR module of the prior art;

[0026] Figure 1b are two parallel bidirectional SCR modules of the prior art;

[0027] Figure 2 is a process solution proposed by the inventor in the process of solving the prior art;

[0028] Figure 3Schematic diagram 1 of the topology of the SCR component according to an embodiment of the present invention;

[0029] Figure 4 Schematic diagram of the topology of the SCR component according to an embodiment of the present invention Figure 2 ;

[0030] Figure 5 Schematic diagram 1 of the bypass component according to an embodiment of the present invention;

[0031] Figure 6 Schematic diagram of the bypass component according to an embodiment of the present invention Figure 2 .

[0032] Description of main reference numerals:

[0033] SCR module 10; housing 11; first box 20; second box 30; first copper bar 40; first section 41; second section 42; second copper bar 50; input copper bar 60; output copper bar 70; third section 71; fourth section 72. Detailed implementation manners

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the preferred embodiments of the present invention and should not be regarded as excluding other embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0035] In the claims, the description and the above-mentioned accompanying drawings of the present invention, unless otherwise clearly defined, when using terms such as "first", "second" or "third", etc., are for distinguishing different objects and not for describing a specific order.

[0036] In the claims, the description and the above-mentioned accompanying drawings of the present invention, when using terms such as "comprising", "having" and their variants, are intended to mean "including but not limited to".

[0037] Embodiment 1

[0038] See Figures 3 - 4 [[ID=4I]] (Here, the content after "See" is missing in the original text, so it cannot be accurately translated. You can supplement the complete content for a more accurate translation.) Figures 3 - 4There is shown an SCR assembly, including two identical SCR modules 10. Each SCR module 10 includes a housing 11 and two SCRs located within the housing 11. The anodic terminals of the two SCRs are connected in parallel to form the first connection port of the SCR module 10, and the cathodic terminals of the two SCRs are connected in parallel to form the second connection port of the SCR module 10. The first connection port and the second connection port of each SCR module 10 are both embedded in the outer wall of the housing 11. Such an arrangement is conducive to ensuring that the two co-directional SCRs of the SCR module have the same impedance in engineering applications. The first connection port of each SCR module 10 is electrically connected to the second connection port of another SCR module 10. One of the first connection port and the second connection port is the input port of the SCR module 10, and the other is the output port of the SCR module 10.

[0039] Figures 3 - 4 In [the figure], the SCR assembly forms a total input terminal and a total output terminal, and the total input terminal and the total output terminal can be connected to the bypass of the UPS. Figure 3 [The figure] shows a schematic diagram in which the first connection port is the input port of the SCR module 10 and the second connection port is the output port of the SCR module 10. Figure 4 [The figure] shows a schematic diagram in which the first connection port is the output port of the SCR module 10 and the second connection port is the input port of the SCR module 10.

[0040] It should be understood that the two SCR modules 10 being identical not only means being identical in topology but also in structure. The directions of the two housings 11 correspond, and the first connection ports and the second connection ports of the two SCR modules 10 are both arranged on the same side. Although the above embodiments only show that the SCR module 10 includes two SCRs, when the over-current level of the bypass is large, each SCR can include multiple co-directional SCRs connected in parallel as needed.

[0041] The above arrangement enables the two SCR modules 10 to form a reverse parallel connection in topology. Each SCR module 10 includes two co-directional SCRs connected in parallel in topology. When the mains power is in the positive half-cycle, the current passes through one of the SCR modules 10, and when the mains power is in the negative half-cycle, the current passes through the other SCR module 10. The two SCRs can share the large current, which is conducive to realizing the capacity expansion of the UPS.

[0042] In the prior art in actual engineering, the two co-directional SCRs used to share the current are actually located in two different housing packages (i.e., in two bidirectional SCR modules respectively). Therefore, between the actual current splitting point and the actual current converging point of the above two SCRs, there are not only the internal circuits of the packages but also the external circuits between different packages. Therefore, it is difficult to ensure the consistency of the line impedance between these two SCRs, and it is also difficult to achieve current sharing.

[0043] When the above solution of the present invention is applied in actual engineering, the two SCRs connected in parallel in the same direction for sharing the positive half-cycle current or the negative half-cycle current are both located in the same housing package. That is, the circuit between the actual current shunting point and the actual current converging point of the two SCRs only includes the internal circuit of the housing package. Since the internal circuit impedances of the components within the same housing package can be relatively easily kept consistent (in fact, the internal circuit impedances are configured to be consistent when the device packages leave the factory), this enables the circuit impedance between the two SCRs connected in parallel in the same direction for sharing the current in this solution to be actually kept consistent, thereby enabling the current sharing of the entire SCR component.

[0044] Moreover, the key to the above solution of the present invention lies in that the maintainability of the SCR module 10 can still be maintained while achieving current sharing.

[0045] The present invention's solution uses two identical SCR modules 10. By configuring the wiring outside the SCR module 10, on the basis of being able to implement the circuit topology principle, not only the current sharing problem is solved, but also the arbitrary assembly of the SCR module 10 can be achieved when the customer maintains the SCR component.

[0046] It can be seen that although the present invention's solution reduces the wiring convenience on the manufacturer's side to a certain extent, it effectively improves the maintenance efficiency and maintenance safety on the customer side, and overall still better enhances the market competitiveness of the UPS product.

[0047] Embodiment 2

[0048] See Figures 5 - 6 , the present invention also provides a bypass component, including a first box body 20, a second box body 30, and three SCR components in Embodiment 1. Among them, the first connection port is the input port, and the second connection port is the output port. The first box body 20 and the second box body 30 are arranged side by side along the first direction, and the first direction is the height direction of the first box body 20 and the second box body 30. Three SCR modules 10 respectively for accessing the A-phase input power, B-phase input power, and C-phase input power are placed in the first box body 20 along the second direction perpendicular to the first direction, and the first connection ports and the second connection ports of the three SCR modules 10 both extend out of the first box body 20. Figures 5 - 6 In [reference], the first connection ports and the second connection ports of the three SCR modules 10 in the first box body 20 are respectively shown as A-in, A-out, B-in, B-out, C-in, and C-out. Three SCR modules 10 respectively for accessing the A-phase output power, B-phase output power, and C-phase output power are placed in the second box body 30 along the second direction, and the first connection ports and the second connection ports of the three SCR modules 10 both extend out of the second box body 30. Figures 5 - 6The first connection ports and the second connection ports of the three SCR modules 10 in the second box body 30 are shown as A in, A out, B in, B out, C in, and C out respectively; the two SCR modules 10 closest to each other in the first box body 20 and the second box body 30 form the SCR assembly in Embodiment 1; the first connection ports and the second connection ports of each SCR module 10 are arranged along the second direction, and the three SCR assemblies are arranged along the second direction. Figures 5 - 6 In this case, the first direction is the vertical direction and the second direction is the left - right direction. In this embodiment, the structures of the first box body 20 and the second box body 30 are exactly the same, and the projections of the first box body 20 and the second box body 30 along the first direction completely overlap. The first box body 20 is located below the second box body 30, and the connection ports extending from the first box body 20 and the connection ports extending from the second box body 30 correspond to each other one - to - one along the first direction; the first connection port of each SCR module 10 in the first box body 20 is connected to the second connection port of the closest SCR module 10 in the second box body 30 through the first copper row 40, and the second connection port of each SCR module 10 in the first box body 20 is connected to the first connection port of the closest SCR module 10 in the second box body 30 through the second copper row 50.

[0049] Specifically, referring to Figure 6 , the projections of the connection ports extending from the first box body 20 and the connection ports extending from the second box body along the first direction overlap one - to - one, ensuring the shortest distance between the connection ports on the first box body 20 and the connection ports on the second box body 30, and thus also making the first copper row 40 and the second copper row 50 have relatively short lengths; the first copper row 40 is composed of several first - stage segments 41 extending along the first direction and several second - stage segments 42 extending along the second direction. Figure 6 In this case, the first copper row 40 is composed of two first - stage segments 41 and two second - stage segments 42; the second copper row 50 extends along the third direction, and the third direction intersects the first direction at an acute angle. Figure 6 In this case, the second copper row 50 slopes downward and to the right from top to bottom. The structural settings of the first copper row 40 and the second copper row 50 are not only easy for wiring, but also neatly arranged and more aesthetically pleasing.

[0050] In practical applications, the three SCR modules 10 placed in the first box body 20 are respectively connected to the A-phase input power, B-phase input power, and C-phase input power through three input copper bars 60; the three SCR modules 10 placed in the second box body 30 are respectively connected to the A-phase output power, B-phase output power, and C-phase output power through three output copper bars 70; the three-phase input power interface and the three-phase output power interface are arranged on the same side; the input copper bars 60 extend along the second direction, and the three input copper bars 60 are arranged at intervals along the first direction; the output copper bars 70 are L-shaped, which includes a third section 71 extending along the first direction and a fourth section 72 extending along the second direction, and the fourth sections 72 of the three output copper bars 70 are arranged at intervals along the first direction, and the three third sections 71 are arranged at intervals along the second direction. The structural settings of the input copper bars 60 and the output copper bars 70 are easy for wiring, and the layout is regular and beautiful.

[0051] The above settings facilitate wiring, are not prone to wiring errors, and the copper bars can withstand a larger current compared to cables, ensuring the stability of the bypass component; the first box body 20 and the second box body 30 are arranged side by side along the first direction, so that the three-phase input wire ports and the three-phase output wires are also arranged side by side along the first direction, facilitating wiring and reducing the width of the chassis, and compared with Figure 2 the scheme, it is easy to transform and the transformation cost is low.

[0052] It can be seen that by adopting the technical solution of the present invention, it can be applied to the expanded UPS, effectively avoiding uneven current distribution in the bypass during engineering applications, and the maintenance is convenient.

[0053] Embodiment 3

[0054] The present invention also provides an uninterruptible power supply, on the bypass of which there is a bypass component in Embodiment 2, having the same technical effects as Embodiment 2. The main circuit part of the uninterruptible power supply belongs to the prior art, and will not be described in detail in this embodiment.

[0055] The above description of the specification and embodiments is used to explain the protection scope of the present invention, but does not constitute a limitation on the protection scope of the present invention. Through the inspiration of the present invention or the above embodiments, those of ordinary skill in the art, combined with common general knowledge, ordinary technical knowledge in the art, and / or the prior art, through logical analysis, reasoning, or limited experiments, can obtain modifications, equivalent replacements, or other improvements to the embodiments of the present invention or some of its technical features, which should all be included in the protection scope of the present invention.

Claims

1. An SCR component, characterized in that, It includes two identical SCR modules (10). Each SCR module (10) includes a housing (11) and two SCRs located inside the housing (11). The anodic terminals of the two SCRs are connected in parallel to form the first connection port of the SCR module (10), and the cathodic terminals of the two SCRs are connected in parallel to form the second connection port of the SCR module (10); the first connection port and the second connection port of each SCR module (10) are both embedded in the outer wall of the housing (11); the first connection port of each SCR module (10) is electrically connected to the second connection port of the other SCR module (10); one of the first connection port and the second connection port is the input port of the SCR module (10), and the other is the output port of the SCR module (10); the input ports of the two SCR modules (10) are arranged on the same side, and the output ports of the two SCR modules (10) are arranged on the same side.

2. A bypass component, characterized in that, It includes a first box body (20), a second box body (30) and three SCR assemblies as described in claim 1. The first box body (20) and the second box body (30) are arranged side by side along a first direction, and the first direction is the height direction of the first box body (20) and the second box body (30). Three SCR modules (10) respectively for accessing A-phase input power, B-phase input power and C-phase input power are placed in the first box body (20) along a second direction perpendicular to the first direction, and the first connection port and the second connection port of the three SCR modules (10) both extend out of the first box body (20). Three SCR modules (10) respectively for accessing A-phase output power, B-phase output power and C-phase output power are placed in the second box body (30) along the second direction, and the first connection port and the second connection port of the three SCR modules (10) both extend out of the second box body (30); the two SCR modules (10) closest to each other in the first box body (20) and the second box body (30) form the SCR assembly; the first connection port and the second connection port of each SCR module (10) are arranged along the second direction; the first connection port of each SCR module (10) in the first box body (20) is connected to the second connection port of the closest SCR module (10) in the second box body (30) through a first copper bar (40), and the second connection port of each SCR module (10) in the first box body (20) is connected to the first connection port of the closest SCR module (10) in the second box body (30) through a second copper bar (50).

3. The bypass component according to claim 2, characterized in that, The projections along the first direction of the connection ports extending out of the first box body (20) and the connection ports extending out of the second box body (30) overlap one by one; the first copper bar (40) is composed of a plurality of first segments (41) extending along the first direction and a plurality of second segments (42) extending along the second direction; the second copper bar (50) extends along a third direction, and the third direction intersects the first direction at an acute angle.

4. The bypass component according to claim 3, characterized in that, Three SCR modules (10) placed in the first box body (20) are respectively connected to the A-phase input power, B-phase input power, and C-phase input power through three input copper bars (60); three SCR modules (10) placed in the second box body (30) are respectively connected to the A-phase output power, B-phase output power, and C-phase output power through three output copper bars (70); the input copper bars (60) extend along the second direction, and the three input copper bars (60) are arranged at intervals along the first direction; the output copper bars (70) are L-shaped, and include a third section (71) extending along the first direction and a fourth section (72) extending along the second direction, and the fourth sections (72) of the three output copper bars (70) are arranged at intervals along the first direction.

5. An uninterruptible power supply, characterized in that, A bypass component as described in any one of claims 2-4 is provided on its bypass path.

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