Transformer

Abstract

The utility model provides a transformer. The transformer comprises at least one coil assembly, each coil assembly comprises N first coils, a second coil, a secondary coil and a connecting plate, and N is an integer larger than or equal to 2; in each coil assembly, the N first coils are sequentially connected in series, and the connecting plate connects the wiring end of the second coil with the wiring end of the ith first coil in the N first coils, so that the first i first coils in the N first coils are connected with the second coil in series to form a primary coil of the transformer; when the connecting plate is switched from connecting the wiring end of the second coil with the wiring end of the ith first coil to connecting the wiring end of the second coil with the wiring ends of other first coils except the ith first coil, the voltage regulating range of the transformer is changed, and i is larger than or equal to 1 and smaller than or equal to N and is an integer.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, and particularly relates to a transformer. Background Art

[0002] Traditional transformers often have only one voltage regulation range to cope with relatively single operating scenarios. For users with more complex requirements, the single voltage regulation range of traditional transformers may not meet the actual needs of the users. (Taking a specific example, in an exemplary scenario, the user's requirement is that the transformer needs to have a voltage regulation range of 120±6kV / 16.5kV (i.e., high voltage 120±6kV / low voltage 16.5kV) and 132±6kV / 16.5kV (i.e., high voltage 132±6kV / low voltage 16.5kV), then the traditional transformer can only adapt to one of them). Therefore, a new technical solution for transformers is needed to meet the needs of users. Summary of the Utility Model

[0003] An embodiment of the present application provides a transformer, including: at least one coil assembly, each coil assembly including: N first coils, a second coil, a secondary coil, and a connection plate, where N≥2 and is an integer; in each of the coil assemblies: the N first coils are connected in series in sequence, and the connection plate connects the connection terminal of the second coil to the connection terminal of the i-th first coil among the N first coils, so that the first i first coils among the N first coils are connected in series with the second coil to form the primary coil of the transformer; when the connection plate switches from connecting the connection terminal of the second coil to the connection terminal of the i-th first coil to connecting the connection terminal of the second coil to the connection terminals of the other first coils except the i-th first coil, the voltage regulation range of the transformer is changed, where 1≤i≤N and is an integer.

[0004] In some optional embodiments, N = 2.

[0005] In some optional embodiments, the transformer includes one coil assembly or three coil assemblies.

[0006] In some optional embodiments, the transformer further includes a box body, the box body is provided with a wiring cavity, and the wiring cavity can be exposed outside the box body for wiring the transformer; for each coil assembly: one connection terminal of the N first coils and one connection terminal of the second coil are respectively led to the wiring cavity through a plurality of conductive components, and the connection plate is arranged in the wiring cavity and connected to the conductive components.

[0007] In some alternative embodiments, the conductive component includes a cable and a conductor bar. The first end of the cable is connected to the connection terminal of the first coil or the connection terminal of the second coil. The second end of the cable is crimped to the first end of the conductor bar. The second end of the conductor bar is for connecting to the connection plate.

[0008] In some alternative embodiments, for each coil assembly: the distances between the second ends of the conductor bars respectively connected to the connection terminals of the N first coils and the second end of the conductor bar connected to the connection terminal of the second coil are all equal.

[0009] In some alternative embodiments, the second end of the conductor bar is a flattened structure.

[0010] In some alternative embodiments, the second end of the conductor bar is connected to the connection plate by bolts.

[0011] In some alternative embodiments, at least one edge of the conductor bar is rounded, and / or at least one edge of the connection plate is rounded.

[0012] In some alternative embodiments, the transformer is an oil-immersed transformer.

[0013] The transformer provided in this application can connect the connection terminal of the second coil to the connection terminals of different first coils among the N first coils through the connection plate, so that different numbers of first coils and second coils can be connected in series to form a primary coil. Therefore, by using different numbers of first coils in the primary coil, a variety of different turns ratio ranges can be formed between the primary coil and the secondary coil of the transformer, so that the transformer can be used in different voltage regulation ranges, thereby realizing the change of the voltage regulation range of the transformer, enabling the transformer to meet the user's usage requirements for various voltage regulation ranges of the transformer, and improving the usage effect of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The following drawings are only intended to illustrate and explain the present application schematically and do not limit the scope of the present application.

[0015] Figure 1 A schematic diagram of an alternative transformer according to an embodiment of the present application is shown.

[0016] Figure 2 A schematic diagram of another alternative transformer according to an embodiment of the present application is shown.

[0017] Figure 3 A schematic diagram of a connection manner example when the coil assembly includes more than two first coils is shown.

[0018] Figure 4 A schematic diagram showing an example of the connection mode when the coil assembly includes two first coils.

[0019] Figure 5 A partial schematic diagram showing an example of the connection between the connecting plate and the conductive component in the wiring cavity of the box body.

[0020] Figure 6 Shows Figure 5 A partial schematic diagram at Q in

[0021] Figure 7 A partial schematic diagram showing another example of the connection between the connecting plate and the conductive component in the wiring cavity of the box body.

[0022] Figure 8 A schematic diagram showing an example of the connection mode among a plurality of conductive components, the wiring terminals of the first coil, the wiring terminals of the second coil, and the connecting plate.

[0023] Reference numerals: 100, transformer; 101, box body; 102, wiring cavity; 103, cover body; 104, wiring hole; 10, primary coil; 11, first coil; 12, second coil; 20, secondary coil; 30, connecting plate; 40, conductive component; 41, cable; 42, conductor bar; 43, bolt; 44, nut; 50, iron core; 51, iron core column. Detailed implementation manners

[0024] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art shall fall within the protection scope of the embodiments of the present application.

[0025] It should be noted that the structures in the respective specification drawings of the present application are not necessarily drawn according to the actual ratio, and they are only used for facilitating the description and understanding of this embodiment, rather than imposing any limitation on the present application.

[0026] Refer to Figures 1-8As shown in the figure, an embodiment of the present application provides a transformer 100, which includes: at least one coil assembly, and each coil assembly includes: N first coils 11, a second coil 12, a secondary coil 20, and a connection plate 30, where N≥2 and is an integer; in each coil assembly: the N first coils 11 are connected in series in sequence, and the connection plate 30 connects the terminal of the second coil 12 to the terminal of the i-th first coil 11 among the N first coils 11, so that the first i first coils 11 among the N first coils 11 are connected in series with the second coil 12 to form a primary coil 10 of the transformer 100, and the number of turns of the second coil 12 incorporated into the primary coil 10 can be adjusted; when the connection plate 30 switches from connecting the terminal of the second coil 12 to the terminal of the i-th first coil 11 to connecting the terminal of the second coil 12 to the terminals of the other first coils 11 except the i-th first coil 11, the voltage regulation range of the transformer 100 is changed, where 1≤i≤N and is an integer.

[0027] The transformer 100 provided in the present application can connect the terminal of the second coil 12 to the terminals of different first coils 11 among the N first coils 11 through the connection plate 30, so that different numbers of first coils 11 and the second coil 12 can be connected in series to form the primary coil 10, and the number of turns of the second coil 12 incorporated into the primary coil 10 can be adjusted. Therefore, through different numbers of first coils 11 in the primary coil 10, a variety of different turns ratio ranges can be formed between the primary coil 10 and the secondary coil 20 of the transformer 100, so that the transformer 100 can be used for different voltage regulation ranges, thereby realizing the change of the voltage regulation range of the transformer 100, enabling the transformer 100 to meet the user's usage requirements for various voltage regulation ranges of the transformer, and improving the usage effect of the transformer 100.

[0028] Optionally, each coil assembly of the transformer 100 in the present application can respectively correspond to one phase of the transformer 100, and the first coil 11 and the second coil 12 in each coil assembly can be used with a connection plate 30 to form a primary coil 10 of one phase.

[0029] In some alternative embodiments, referring to Figure 1 As shown in the figure, the transformer 100 can be a single-phase transformer, and at this time the transformer 100 includes one coil assembly. In some other alternative embodiments, referring to Figure 2 As shown in the figure, the transformer 100 can be a three-phase transformer, and at this time the transformer 100 includes three coil assemblies. Based on this, since in the above-mentioned multiple alternative embodiments, the user's usage requirements for various voltage regulation ranges of single-phase transformers or three-phase transformers can be met, and the usage effect of the transformer can be improved.

[0030] For example, for the transformer 100 being a three-phase transformer, its three phases can be respectively denoted as phase U, phase V, and phase W. Phase U, phase V, and phase W respectively correspond to 1 coil assembly, with a total of M = 3 coil assemblies. Taking each coil assembly including N first coils 11, one second coil 12, one secondary coil 20, and one connecting plate 30 as an example. For the coil group corresponding to phase U, its N first coils 11 are connected in series in sequence. The first one of the N first coils 11 can form the first end of the primary coil 10 of phase U. The two ends of the connecting plate 30 corresponding to phase U can be respectively connected to a wiring terminal of the second coil 12 and a wiring terminal of the i-th (1 ≤ i ≤ N and i is an integer) first coil 11 among the N first coils 11, so as to connect the first i first coils 11 (i.e., the 1st to i-th first coils 11) among the N first coils 11 in series with the second coil 12 to form the primary coil 10 corresponding to phase U. The second coil 12 can be a voltage regulating coil, and the number of turns thereof connected to the primary coil 10 can be adjusted. When the connecting plate 30 corresponding to phase U is switched from connecting the wiring terminal of the second coil 12 to the wiring terminal of the i-th first coil 11 to connecting the wiring terminal of the second coil 12 to the wiring terminals of the other first coils 11 except the i-th first coil 11, different numbers of first coils 11 in the primary coil 10 corresponding to phase U can be used to form a variety of different turns ratio ranges between the primary coil 10 and the secondary coil 20, realizing the change of the voltage regulation range of phase U of the transformer 100. It should be understood that for the coil assemblies corresponding to phase V and phase W, they can be understood according to the description of the coil assembly corresponding to phase U above, and the principles and structures are similar, so they will not be elaborated.

[0031] Optionally, the connecting plate 30 can be manually switched by the user to be connected to the wiring terminals of different first coils 11, so as to connect different numbers of first coils 11 in series with the second coil 12 to form the primary coil 10, realizing the change of the voltage regulation range.

[0032] Optionally, referring to Figure 1 and Figure 2 as shown, the transformer 100 can further include an iron core 50. The iron core 50 can include an iron core column 51, and the iron core 50 can be used to form the magnetic circuit of the transformer 100. For example, referring to Figure 1 as shown, the transformer 100 can be a single-phase transformer. The coil assembly can be sleeved on one iron core column 51. For example, the secondary coil 20 can be sleeved on the outside of the iron core column 51, and the N first coils 11 and the second coil 12 are sleeved on the outside of the secondary coil 20, so that the primary coil 10 formed by connecting different numbers of first coils 11 and the second coil 12 in series through the connecting plate 30 can be sleeved on the outside of the secondary coil 20. Another example, referring to Figure 2As shown, the transformer 100 can be a three-phase transformer. The iron core 50 includes three iron core columns (i.e., iron core columns 51U, 51V, and 51W), which respectively correspond to the three coils of the three phases. The three coil assemblies corresponding to the U phase, V phase, and W phase can be respectively sleeved on the three iron core columns 51U, 51V, and 51W. For the iron core column 51U, the secondary coil 20 in the coil assembly of the U phase sleeved thereon is sleeved on the outside of the iron core column 51U, and N first coils 11 and second coils 12 are sleeved on the outside of the secondary coil 20; for the iron core column 51V, the secondary coil 20 in the coil assembly of the V phase sleeved thereon is sleeved on the outside of the iron core column 51V, and N first coils 11 and second coils 12 are sleeved on the outside of the secondary coil 20; for the iron core column 51W, the secondary coil 20 in the coil assembly of the W phase sleeved thereon is sleeved on the outside of the iron core column 51W, and N first coils 11 and second coils 12 are sleeved on the outside of the secondary coil 20. It should be understood that the above-mentioned various schematic diagrams and related descriptions do not impose any limitations on the embodiments of the present application.

[0033] Optionally, the transformer 100 in the embodiments of the present application can be an oil-immersed transformer. The oil-immersed transformer has high efficiency, good insulation performance, excellent heat dissipation performance, strong short-circuit resistance, and is relatively convenient for maintenance.

[0034] In other alternative embodiments, the transformer 100 can also be a dry-type transformer, as long as it can meet the requirements.

[0035] Optionally, the coil assembly of the present application can include N first coils 11, where N≥2 and is an integer. The number of first coils 11 in each coil assembly is not specifically limited in the present application. For example, in some alternative embodiments, N can be equal to 2. The transformer 100 with such a structure can meet the usage requirements with two voltage regulation ranges and improve the usage effect of the transformer.

[0036] For example, in an exemplary scenario where the user's requirement is that the transformer needs to have a voltage regulation range of 120±6 kV / 16.5 kV (i.e., high voltage 120±6 kV / low voltage 16.5 kV) and 132±6 kV / 16.5 kV (i.e., high voltage 132±6 kV / low voltage 16.5 kV), when using the connecting plate 30 to connect the terminal of the second coil 12 to the terminal of the first coil 11 of the first one among N = 2 first coils 11, the connecting plate 30 can connect the first coil 11 of the first one and the second coil 12 in series to form the primary coil 10. At this time, for example, correspondingly, the transformer 100 can have a voltage regulation range of 120±6 kV / 16.5 kV; and when using the connecting plate 30 to connect the terminal of the second coil 12 to the terminal of the second coil 11 of the second one among N = 2 first coils 11, the connecting plate 30 can connect the first coil 11 of the first one, the second coil 11 of the second one and the second coil 12 in series to form the primary coil 10. At this time, for example, correspondingly, the transformer 100 can have a voltage regulation range of 132±6 kV / 16.5 kV. In this way, the change of the voltage regulation range of the transformer 100 is realized, meeting the user's requirements for different voltage regulation ranges of the transformer 100.

[0037] Optionally, in the present application, the terminal of the first coil 11 connected by the connecting plate 30 can be the terminal of the voltage output end of the first coil 11, and the terminal of the second coil 12 connected by the connecting plate 30 can be the terminal of the voltage input end of the second coil 12. As long as the requirement that the connecting plate 30 connects the second coil 12 and different numbers of first coils 11 in series can be satisfied, no specific limitation is made here.

[0038] For example, referring to Figure 1 and Figure 2 as shown, in the connection state of the connecting plate 30 therein, the connecting plate 30 can be connected to the terminal of the first coil 11 of the first one among N = 2 first coils 11, so as to connect the first coil 11 of the first one among N = 2 first coils 11 and the second coil 12 in series. In addition, Figure 1 、 Figure 2 the dotted line in shows another connection state of the connecting plate 30 (which is only for easy understanding and does not limit the embodiments of the present application). When the connecting plate 30 is in this another connection state, it can be connected to the terminal of the second coil 11 of the second one among N = 2 first coils 11, and the connecting plate 30 can connect the first and second coils 11 and the second coil 12 in series. Thus, different numbers of first coils 11 and the second coil 12 can be connected in series through the connecting plate 30 to form the primary coil 10.

[0039] For example, as Figure 3The schematic diagram shows an example of the connection mode in which the coil assembly includes more than two first coils 11 (i.e., N>2). One end of the connecting plate 30 can be connected to the terminal of the second coil 12 (for example, it can be schematically understood as the terminal of the voltage input end), and the other end of the connecting plate 30 can be connected to the terminals of different first coils 11 (for example, it can be schematically understood as the terminal of the voltage output end, Figure 3 the lower second end shown in). Thus, different numbers of first coils 11 and the second coil 12 are connected in series to form the primary coil 10. Figure 3 The dotted line in shows the state when the connecting plate 30 is connected to the terminals of different first coils 11, which is only for easy understanding and is not a limitation on the embodiments of the present application.

[0040] For another example, as Figure 4 The schematic diagram shows an example of the connection mode in which the coil assembly includes two first coils 11 (i.e., N = 2). Figure 4 It can be applied to Figure 1 and Figure 2 the example of the transformer 100 in. One end of the connecting plate 30 can be connected to the terminal of the second coil 12 (for example, it can be schematically understood as the terminal of the voltage input end), and the other end of the connecting plate 30 can be connected to the terminals of different first coils 11 (for example, it can be schematically understood as the terminal of the voltage output end, Figure 4 the lower second end shown in). Thus, different numbers of first coils 11 and the second coil 12 are connected in series to form the primary coil 10. Figure 4 The dotted line in shows the state when the connecting plate 30 is connected to the terminals of different first coils 11, which is only for easy understanding and is not a limitation on the embodiments of the present application.

[0041] Optionally, the M coil assemblies in the present application may include the same number of first coils 11. For example, referring to Figure 1 and Figure 2 shown, each coil assembly includes N = 2 first coils 11.

[0042] Optionally, the first one of the N first coils 11 in the present application can be used as the main coil of the primary coil 10 of the transformer 100. This is because the transformer 100 in the present application actually changes the voltage regulation range by changing the number of the first coils 11 from the 2nd to the Nth first coils 11 connected in series between the first coil 11 and the second coil 12.

[0043] Optionally, the second coil 12 can be used as a voltage regulating coil, and the number of turns of the second coil 12 connected to the primary coil 10 can be adjusted. Subsequently, a range of turns ratios can be formed between the primary coil 10 and the secondary coil 20, so that the transformer 100 can have a voltage regulation range. Optionally, the transformer 100 can further include an adjustment unit, which is connected to the second coil 12 and is used to adjust the number of turns of the second coil 12 connected to the primary coil 10. For example, taking the total number of turns of the second coil 12 as 100 turns, the adjustment unit can be used to connect 10, 20,..., 90, 100 turns in the second coil 12 to the primary coil 10 (it should be understood that this is only an example and not a limitation on the embodiments of the present application). Optionally, the voltage regulating unit can be a voltage regulating switch in any form. Optionally, the second coil 12 can include tap wires, and the voltage regulating switch can be connected to the tap wires of the second coil 12 to facilitate adjusting the number of turns of the second coil 12 connected to the primary coil 10.

[0044] Optionally, in each coil assembly of the transformer 100 in the present application, the number of turns of the first of the N first coils 11 can be greater than the number of turns of the 2nd to Nth first coils 11 among the N first coils 11. In other alternative embodiments, the number of turns of the first of the N first coils 11 can also be equal to or less than the number of turns of the 2nd to Nth first coils 11 among the N first coils 11. As long as the requirements can be met, no specific limitations are imposed here.

[0045] Optionally, in each coil assembly of the transformer 100 in the present application, the number of turns of the second coil 12 is the same as the number of turns of the 2nd to Nth first coils 11 among the N first coils 11. Or in other embodiments, the number of turns of the second coil 12 is not the same as the number of turns of the 2nd to Nth first coils 11 among the N first coils 11. As long as the requirements can be met, no specific limitations are imposed here.

[0046] In the present application, the connecting plate 30 can be of any shape. For example, the connecting plate 30 can be rectangular. Or other shapes such as oblong can also be used, or irregular shapes can also be used, as long as the requirements can be met, no specific limitations are imposed here. The connecting plate 30 can be made of any conductive material, preferably a metal material, that is, the connecting plate 30 can be a metal connecting plate. For example, the connecting plate 30 can be a copper plate.

[0047] In some alternative embodiments, referring to Figure 5 、 Figure 6 、 Figure 7 、 Figure 8As shown, the transformer 100 further includes a box body 101. The box body 101 is provided with a wiring cavity 102, and the wiring cavity 102 can be exposed to the outside of the box body 101 for wiring the transformer 100. For each coil assembly: one wiring end of the N first coils 11 and one wiring end of the second coil 12 are respectively led out into the wiring cavity 102 through a plurality of conductive components 40. The connecting plate 30 is arranged in the wiring cavity 102 for connecting with the conductive components 40.

[0048] Based on this, in this application, one wiring end of each of the first coils 11 and one wiring end of the second coil 12 are led out into the wiring cavity 102 through the conductive components 40, and the connecting plate 30 is arranged in the wiring cavity 102 to connect with the conductive components 40, which can facilitate the user to connect the connecting plate 30 with the corresponding conductive components 40, so as to connect the wiring ends of the second coil 12 and the wiring ends of different numbers of the first coils 11 in series. Thus, different numbers of the first coils 11 and the second coil 12 can be connected in series to form the primary coil 10. The number of turns of the second coil 12 connected to the primary coil 10 can be adjusted. Therefore, through different numbers of the first coils 11 in the primary coil 10, a variety of different turns ratio ranges can be formed between the primary coil 10 and the secondary coil 20 of the transformer 100. Thus, the transformer 100 can be used for different voltage regulation ranges, thereby realizing the change of the voltage regulation range of the transformer 100, enabling the transformer 100 to meet the user's usage requirements for various voltage regulation ranges of the transformer and improving the usage effect of the transformer 100.

[0049] Optionally, referring to Figure 5 As shown, in this application, the box body 101 can be the outer shell of the transformer 100 and can be used to accommodate the coil assembly. The wiring cavity 102 can be a cavity provided in the box body 101 for wiring the transformer 100. For example, it can be understood by referring to Figure 5 that by opening a wiring hole 104 in the box body 101 and providing a cover body 103 that can cover the wiring hole 104, when the cover body 103 is not opened, the wiring cavity 102 can be located below the cover body 103. By opening the cover body 103, the wiring cavity 102 can be exposed to the outside of the box body 101, and the user can perform wiring operations on the transformer 100 through the wiring hole 104 in the wiring cavity 102. Referring to Figure 5 As shown, an example in which the cover body 103 is opened is shown.

[0050] Optionally, in each coil assembly of the transformer 100 in this application, the distances between the conductive components 40 connected to the wiring ends of the N first coils 11 and the conductive components 40 connected to the wiring end of the second coil 12 are all equal.

[0051] Based on this, a connecting plate 30 can be used to conveniently connect the terminal of the second coil 12 to the terminal of any one of the N first coils 11 to form a primary coil 10. By using different numbers of first coils 11 in the primary coil 10, different turns ratio ranges can be formed between the primary coil 10 and the secondary coil 20 of the transformer 100, thereby realizing the change of the voltage regulation range of the transformer 100, enabling the transformer 100 to meet the user's usage requirements for various voltage regulation ranges of the transformer, and improving the usage effect of the transformer 100.

[0052] The specific structure of the conductive component 40 is not limited in this application. In some alternative embodiments, referring to Figure 5 、 Figure 6 、 Figure 7 and Figure 8 as shown, the conductive component 40 includes a cable 41 and a conductor bar 42. The first end of the cable 41 is connected to the terminal of the first coil 11 or the terminal of the second coil 12. The second end of the cable 41 is crimped to the first end of the conductor bar 42, and the second end of the conductor bar 42 is used to connect to the connecting plate 30.

[0053] Based on this, through the alternative structure of the conductive component 40 in this application, one terminal of the first coil 11 or one terminal of the second coil 12 can be effectively led out to the wiring cavity through the cable 41 and the conductor bar 42, and the conductor bar 42 of the conductive component 40 connected to the terminal of the second coil 12 is connected to the conductor bar 42 of the conductive component 40 connected to the terminal of any one of the N first coils 11 by using the connecting plate 30 to form a primary coil 10. The number of turns of the second coil 12 connected to the primary coil 10 can be adjusted. Therefore, different numbers of first coils 11 in the primary coil 10 can be used to form different turns ratio ranges between the primary coil 10 and the secondary coil 20 of the transformer 100 to realize the change of the voltage regulation range of the transformer 100, enabling the transformer 100 to meet the user's usage requirements for various voltage regulation ranges of the transformer and improving the usage effect of the transformer 100; moreover, the second end of the cable 41 is crimped to the first end of the conductor bar 42, which can effectively ensure the electrical connection stability between the cable 41 and the conductor bar 42.

[0054] For example, referring to the example shown in Figure 8 , it can be applicable to the connection method in Figure 8 , Figure 4 in Figure 8It includes three conductive components 40. For the left conductive component 40, the first end of its cable 41 is connected to a terminal of the first of the N = 2 first coils 11, the second end of its cable 41 is connected to the first end of its conductor bar 42, and the second end of its conductor bar 42 is connected to one end of the connecting plate 30; for the middle conductive component 40, the first end of its cable 41 is connected to a terminal of the second coil 12, the second end of its cable 41 is connected to the first end of its conductor bar 42, and the second end of its conductor bar 42 is connected to the other end of the connecting plate 30; for the right conductive component 40, the first end of its cable 41 is connected to a terminal of the second of the N = 2 first coils 11, the second end of its cable 41 is connected to the first end of its conductor bar 42, and the second end of its conductor bar 42 is not connected to the connecting plate 30. In this connection state, the connecting plate 30 can connect the first first coil 11 and the second coil 12 in series to form the primary coil 10. Figure 8 The dotted line shown in it indicates another connection state of the connecting plate 30. In this connection state, both ends of the connecting plate 30 are respectively connected to the conductor bar 42 of the middle conductive component 40 and the conductor bar 42 of the right conductive component 40, so that the connecting plate 30 can connect the first and second first coils 11 and the second coil 12 in series to form the primary coil 10. Thus, by switching the connection state of the connecting plate 30 (which can be manually switched by the user), different numbers of first coils 11 are included in the primary coil 10, so that a variety of different turns ratio ranges are formed between the primary coil 10 and the secondary coil 20 of the transformer 100, so that the transformer 100 can be used for different voltage regulation ranges, and thus the change of the voltage regulation range of the transformer 100 can be realized, so that the transformer 100 can meet the user's usage requirements for various voltage regulation ranges of the transformer 100 and improve the usage effect of the transformer 100. It should be understood that Figure 8 the middle part of the cable 41 in it is omitted for the sake of illustration, and Figure 8 the example shown is not a limitation to any embodiment of the present application.

[0055] The conductor bar 42 adopted in the present application can be made of any conductor material. For example, in an optional example, the conductor bar 42 can be a copper bar, so that the conductor bar 42 can take into account good electrical conductivity and cost. In other alternative embodiments, the conductor bar 42 can also be an aluminum bar or a conductor bar made of other metal materials.

[0056] The structure of the conductor bar 42 is not limited in the present application. In some alternative embodiments, referring to Figure 5 、 Figure 6 、 Figure 7 、 Figure 8As shown, the second end of the conductor bar 42 is a flattened structure. Since the second end of the conductor bar 42 is a flattened structure, it is more convenient to connect with the connecting plate 30, meeting the wiring requirements, and can better adapt to the electrical distance requirements of the transformer 100.

[0057] For example, referring to Figure 7 As shown, there may be a certain distance between the second end of the conductor bar 42 and the wiring hole 104 in the wiring cavity 102. It should be understood that on the premise of meeting the electrical distance, the second ends of the conductor bars 42 of multiple conductive components 40 can be arranged as close as possible to the position of the wiring hole 104 opened in the box body 101 in the wiring cavity 102, so as to more conveniently connect the connecting plate 30 to the wiring ends of the second coil 12 and the wiring ends of different first coils 11 when switching the voltage regulation range, that is, it is convenient for wiring.

[0058] Optionally, in each coil assembly of the transformer 100 in the present application, the distances between the second ends of the conductor bars 42 of the N first coils 11 connected to the wiring ends respectively and the second ends of the conductor bars 42 of the conductive components 40 connected to the wiring end of the second coil 12 are all equal. For example, reference can be made to Figure 8 for illustrative understanding.

[0059] Based on this, a connecting plate 30 can be used to conveniently connect the second end of the conductor bar 42 of the conductive component 40 connected to the wiring end of the second coil 12 to the second end of the conductor bar 42 of the conductive component 40 connected to the wiring end of any one of the N first coils 11, so as to conveniently connect the first end of the second coil 12 to the second end of any one of the N first coils 11 to form a primary coil 10. The number of turns of the second coil 12 connected to the primary coil 10 can be adjusted. Therefore, by different numbers of first coils 11 in the primary coil 10, multiple different turns ratio ranges can be formed between the primary coil 10 and the secondary coil 20 of the transformer 100 to realize the change of the voltage regulation range of the transformer 100, so that the transformer 100 can meet the user's usage requirements for various voltage regulation ranges of the transformer and improve the usage effect of the transformer 100.

[0060] Optionally, at least one edge of the conductor bar 42 can be set to a rounded shape. This can reduce the possibility of the edge of the conductor bar 42 scratching the user during wiring. Optionally, each edge of the conductor bar 42 can be set to a rounded shape. This can better reduce the possibility of the edge of the conductor bar 42 scratching the user during wiring.

[0061] Optionally, at least one edge of the connection plate 30 can be set to a rounded shape. This can reduce the possibility of the edge of the connection plate 30 scratching the user during wiring. Optionally, each edge of the connection plate 30 can be set to a rounded shape. This can better reduce the possibility of the edge of the connection plate 30 scratching the user during wiring.

[0062] In some alternative embodiments, referring to Figure 6 and Figure 7 as shown, the second end of the conductor bar 42 is bolted to the connection plate 30. Based on this, the second end of the conductor bar 42 can be effectively connected to the connection plate 30 and meet the requirements of electrical conductivity.

[0063] For example, a first through hole can be provided on the second end of the conductor bar 42 (such as a flat structure), and second through holes can be provided at both ends of the connection plate 30. The second through holes can be used as connection points for connecting to the second end of the conductor bar 42. Then, a conductive bolt 43 can pass through the first through hole and the second through hole and be connected to a nut 44, so that the second end of the conductor bar 42 and the connection plate 30 form a bolt connection. Optionally, a shielding cap can be provided on at least one of the bolt 43 and the nut 44 for protection.

[0064] It can be understood that there can be more alternative embodiments for the transformer 100 in the embodiments of the present application, which are not limited herein.

[0065] Thus, it can be seen that for the transformer 100 provided in the present application, the connection plate 30 can be used to connect the connection terminals of the second coil 12 to the connection terminals of different first coils 11 among the N first coils 11. Thus, different numbers of first coils 11 and second coils 12 can be connected in series to form a primary coil 10. The number of turns of the second coil 12 connected to the primary coil 10 can be adjusted. Therefore, by using different numbers of first coils 11 in the primary coil 10, a variety of different turn ratios can be formed between the primary coil 10 and the secondary coil 20 of the transformer 100. Thus, the transformer 100 can be used for different voltage regulation ranges, thereby realizing a change in the voltage regulation range of the transformer 100, enabling the transformer 100 to meet the user's requirements for various voltage regulation ranges of the transformer and improving the use effect of the transformer 100.

[0066] It should be understood that expressions similar to "first", "second", "primary" or "secondary" used in the embodiments of the present application can modify various components and have nothing to do with the order and / or importance, but these expressions do not limit the corresponding components. The above expressions are only configured for the purpose of distinguishing components from other components.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A transformer (100), characterized in that, Comprising: At least one coil assembly, each coil assembly comprising: N first coils (11), a second coil (12), a secondary coil (20), and a connection plate (30), where N≥2 and is an integer; in each said coil assembly: the N first coils (11) are connected in series in sequence, the connection plate (30) connects the terminal of the second coil (12) to the terminal of the i-th first coil (11) among the N first coils (11), so that the first i first coils (11) among the N first coils (11) are connected in series with the second coil (12) to form the primary coil (10) of the transformer (100); when the connection plate (30) switches from connecting the terminal of the second coil (12) to the terminal of the i-th first coil (11) to connecting the terminal of the second coil (12) to the terminals of the other first coils (11) except the i-th first coil (11), the voltage regulation range of the transformer (100) is changed, where 1≤i≤N and is an integer.

2. The transformer (100) according to claim 1, characterized in that, N＝2。 3. The transformer (100) according to claim 1, wherein, The transformer (100) comprises one coil assembly or three coil assemblies.

4. The transformer (100) according to any one of claims 1-3, characterized in that, The transformer (100) further comprises a box body (101), the box body (101) is provided with a wiring cavity (102), and the wiring cavity (102) can be exposed to the outside of the box body (101) for wiring the transformer (100); for each coil assembly: one terminal of the N first coils (11) and one terminal of the second coil (12) are respectively led to the wiring cavity (102) through a plurality of conductive components (40), and the connection plate (30) is arranged in the wiring cavity (102) and connected to the conductive components (40).

5. The transformer (100) according to claim 4, characterized in that, The conductive component (40) comprises a cable (41) and a conductor bar (42), the first end of the cable (41) is connected to the terminal of the first coil (11) or the terminal of the second coil (12), the second end of the cable (41) is crimped and connected to the first end of the conductor bar (42), and the second end of the conductor bar (42) is used for connecting to the connection plate (30).

6. The transformer (100) according to claim 5, characterized in that, For each coil assembly: the distances between the second ends of the conductor bars (42) respectively connected to the terminals of the N first coils (11) and the second end of the conductor bar (42) connected to the terminal of the second coil (12) are all equal.

7. The transformer (100) according to claim 5, characterized in that, The second end of the conductor bar (42) is a flattened structure.

8. The transformer (100) according to claim 5, characterized in that, The second end of the conductor bar (42) is connected to the connection plate (30) by bolts.

9. The transformer (100) according to claim 5, characterized in that, At least one edge of the conductor bar (42) is in a rounded shape, and / or at least one edge of the connection plate (30) is in a rounded shape.

10. The transformer (100) according to any one of claims 1-3, characterized in that, The transformer (100) is an oil-immersed transformer.

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