Saturable reactor and electronic power switch

Abstract

The invention discloses a saturable reactor and a power electronic switch, relates to the technical field of power electronic switches, and is used for solving the problems that in the prior art, a saturable reactor is large in parameter margin, large in weight, heavy in size, not suitable for protecting a single-stage thyristor in a low-voltage valve assembly and not capable of meeting the application requirement of the low-voltage valve assembly. The saturable reactor comprises an iron core, a diversion column, a first electrode plate and a second electrode plate; the first electrode plate and the second electrode plate are respectively fixed at two ends of the diversion column; the first electrode plate and the second electrode plate are used as leading-out busbars of the saturable reactor; and the iron core is closed and surrounds the diversion column, and / or the diversion column winds the iron core. The saturable reactor provided by the invention is simple in structure, more compact in size and lower in voltage class, a single thyristor can be configured with a single saturable reactor provided by the invention, and the performance of an original saturable reactor can be realized by connecting a plurality of saturable reactors in series.

Description

Technical Field

[0001] This invention relates to the field of power electronic switch technology, specifically to a saturated reactor and a power electronic switch. Background Technology

[0002] Thyristors are crucial switching elements in conventional DC transmission converter valves, while saturated reactors are vital components protecting these thyristors. Their main functions include: exhibiting high impedance at the moment of thyristor turn-on, thus suppressing the rapid increase of inrush current; providing damping to prevent the first trough current from crossing zero during oscillations; and gradually saturating as the load current increases, resulting in very low impedance and thus not increasing the active or reactive power losses of the converter valve. Furthermore, under transient overvoltage conditions, the saturated reactor absorbs most of the peak voltage, reducing voltage stress on the thyristor.

[0003] Saturated reactors are magnetic components. In existing DC engineering converter valves, a single saturated reactor can typically protect 3 to 8 thyristors, and the low-pressure valve assembly structure usually adopts a form where the thyristors are press-fitted as a whole and then connected in series with the saturated reactor. However, with the evolution of converter topologies, a single-stage thyristor series structure has appeared in the low-pressure valve assembly. To ensure the safe and reliable start-up of a single thyristor, a separate saturated reactor is also required.

[0004] However, due to the large parameter margin, high operating voltage, and high insulation class of existing saturated reactors, they are heavy and bulky, making them unsuitable for protecting single-stage thyristors in low-pressure valve assemblies and unable to meet the application requirements of low-pressure valve assemblies. Summary of the Invention

[0005] To address the problem that existing saturated reactors have large parameter margins, are heavy and bulky, making them unsuitable for protecting single-stage thyristors in low-pressure valve assemblies and failing to meet the application requirements of low-pressure valve assemblies.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] In a first aspect, the present invention proposes a saturated reactor, comprising an iron core, a current-conducting column, a first electrode plate, and a second electrode plate;

[0008] The first electrode plate and the second electrode plate are respectively fixed to both ends of the flow guide column;

[0009] The first electrode plate and the second electrode plate serve as the lead-out busbars of the saturated reactor;

[0010] The iron core is closed around the guide post, and / or the guide post is wrapped around the iron core.

[0011] Preferably, the guide post is wound around the iron core to form a coil structure, and the guide post is electromagnetically coupled to the iron core.

[0012] Preferably, there are multiple guide columns, each of which passes through several iron cores, and the iron cores are closed around the corresponding guide column.

[0013] Preferably, there are multiple guide columns, and the iron core is closed around the multiple guide columns.

[0014] Furthermore, the multiple guide columns are arranged in a matrix, circular, or linear pattern.

[0015] Preferably, the first electrode plate and the second electrode plate are made of a metallic conductive material.

[0016] Preferably, the first electrode plate and the second electrode plate have a circular structure.

[0017] Preferably, the first electrode plate and the second electrode plate at both ends of the flow guide column are parallel to each other.

[0018] In a second aspect, the present invention provides a power electronic switch, comprising a thyristor and a saturated reactor as described in any one of the above-mentioned embodiments;

[0019] The lead-out busbar of the saturated reactor is electrically connected to the cathode or anode of the thyristor.

[0020] Preferably, there are n thyristors and m saturated reactors; n and m are both integers not less than 1; when m is greater than 1, the m saturated reactors are connected end to end.

[0021] The n thyristors are connected in series and then electrically connected to the busbars of the m saturated reactors.

[0022] Preferably, it also includes a heat sink; a plurality of the heat sinks are arranged at intervals, the thyristor or the saturated reactor is disposed between two adjacent heat sinks, the cathode or anode of the thyristor is in contact with the heat sink for electrical connection, and the lead busbar of the saturated reactor is in contact with the heat sink for electrical connection.

[0023] Preferably, the thyristor and the saturated reactor are press-fitted using a press-fit structure.

[0024] Furthermore, the press-fit structure includes an insulating tie rod;

[0025] Both ends of the insulating tie rod are fixed with press-fit end plates. The thyristor and the saturated reactor are placed on one side of the press-fit end plate, and a disc spring is fixed on the other side of the press-fit end plate. The disc spring applies pressure to the thyristor and the saturated reactor for press-fitting.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] This invention provides a saturated reactor. By using a first electrode plate and a second electrode plate as external busbars, and placing the iron core and the current-guiding column between the first and second electrode plates, and by using a connection method where the iron core is closed around the current-guiding column and / or the current-guiding column is wound around the iron core, the electromagnetic coupling structure in existing saturated reactors is simplified. At the same time, the electrode plates serve as supports and external connections, eliminating the need for additional connection structures. Compared with existing saturated reactors, the saturated reactor of this invention has a simpler structure and a more compact size. Furthermore, the electrical parameters can be adjusted by adjusting the structural parameters of the saturated reactor, resulting in a lower voltage level. It can be configured with a single thyristor using a single saturated reactor, or multiple saturated reactors of this invention can be connected in series to achieve the performance of a single saturated reactor. It is suitable for protecting single-stage thyristors in low-pressure valve assemblies, meeting the application requirements of low-pressure valve assemblies.

[0028] This invention provides a power electronic switch that effectively reduces the overall size of the power electronic switch by electrically connecting the lead busbar of a saturated reactor to the cathode or anode of a thyristor. It also enables a compact design for low-voltage valve assemblies with lower voltage levels, allowing for more flexible configuration of the saturated reactor and thyristor. The saturated reactor of this invention can meet the application requirements of configuring a single saturated reactor for a single thyristor in a low-voltage valve assembly, or multiple saturated reactors of this invention can be connected in series to protect any level of thyristor, making the design of the power electronic switch more flexible. Attached Figure Description

[0029] Figure 1 This is a front view of a saturated reactor structure according to Embodiment 1 of the present invention;

[0030] Figure 2 This is a side view of a saturated reactor structure according to Embodiment 1 of the present invention;

[0031] Figure 3 This is a schematic diagram of the first connection structure between the flow guide column and the iron core in Embodiment 1 of the present invention;

[0032] Figure 4 This is a schematic diagram of the second connection structure between the flow guide column and the iron core in Embodiment 1 of the present invention;

[0033] Figure 5This is a schematic diagram of the third connection structure between the flow guide column and the iron core in Embodiment 1 of the present invention;

[0034] Figure 6 This is a schematic diagram of a power electronic switch structure in Embodiment 3 of the present invention.

[0035] In the diagram: 1 is the iron core; 2 is the current guide column; 3 is the electrode plate; 31 is the first electrode plate; 32 is the second electrode plate; 4 is the thyristor; 5 is the saturated reactor; 6 is the heat sink; 7 is the press-fit end plate; 8 is the insulating tie rod; 9 is the disc spring. Detailed Implementation

[0036] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0037] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0042] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0043] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0044] The accompanying drawings illustrate various structural schematic diagrams according to embodiments disclosed in this invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0045] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0046] Example 1

[0047] like Figure 1 As shown, the present invention proposes a saturated reactor, comprising an iron core 1, a current-conducting column 2, and an electrode plate 3. In the embodiment of the present invention, the electrode plate 3 includes a first electrode plate 31 and a second electrode plate 32.

[0048] The first electrode plate 31 and the second electrode plate 32 are respectively fixed at both ends of the guide column 2. The first electrode plate 31 and the second electrode plate 32 are made of conductive material and serve as the lead-out busbar of the saturated reactor 5. The iron core 1 is closed around the guide column 2, and / or the guide column 2 is wound around the iron core 1.

[0049] In the embodiment of the present invention, the saturated reactor is electrically connected to the adjacent thyristor device by fixing the first electrode plate 31 and the second electrode plate 32 at both ends of the current guide column as a connecting busbar. The iron core 1 is closed around the current guide column 2, and / or the current guide column 2 is wound around the iron core 1, so that the iron core 1 and the current guide column 2 are coupled through electromagnetic induction.

[0050] The saturated reactor in this embodiment of the invention can achieve its main functions using only an iron core 1, a current-guiding column 2, and an electrode plate 3. By using the first and second electrode plates as busbars for external connections, and placing the iron core and the current-guiding column between the first and second electrode plates, and by using a connection method where the iron core is closed around the current-guiding column and / or the current-guiding column is wound around the iron core, the electromagnetic coupling structure in the original saturated reactor is simplified. At the same time, the electrode plates play a supporting and external connection role, eliminating the need for additional connection structures. Compared with existing saturated reactors, the structure is simpler and the size is more compact. Furthermore, the electrical parameters of the entire saturated reactor can be adjusted by adjusting the structural parameters or materials of the iron core, the current-guiding column, the first electrode plate, and the second electrode plate, resulting in a lower voltage level. It can be configured with a single thyristor using a single saturated reactor of this invention, or multiple saturated reactors of this invention can be connected in series to achieve the performance of a single saturated reactor. This solves the problem that existing saturated reactors have large parameter margins and large sizes, making them unsuitable for protecting single-stage thyristors in low-pressure valve assemblies and failing to meet the application requirements of low-pressure valve assemblies.

[0051] The electrical parameters of a single saturated reactor in this invention embodiment can be designed to match only one stage of thyristor devices. Furthermore, by connecting the saturated reactors of this invention in series, protection configurations for any stage of thyristors can be achieved, making it suitable for low-pressure valve assemblies. This allows for more flexible configuration of the saturated reactor and thyristors, facilitating modular structural design and making it suitable for protecting single-stage thyristors in low-pressure valve assemblies, thus meeting the application requirements of low-pressure valve assemblies.

[0052] Specifically, in this embodiment of the invention, the electrode plate 3 is made of metal. The electrode plate 3 needs to meet the hardness requirements of the actual application and is generally made of stainless steel.

[0053] Specifically, such as Figure 2As shown, in this embodiment, the core 1 is a circular ring, but a square ring structure can also be used. The specific shape can be selected according to the required structure. The core 1 is generally made of ferrite material, which has high permeability and saturation magnetic induction intensity. The core 1 is the key part of the saturated reactor to realize electromagnetic coupling and energy conversion.

[0054] To further ensure the modular structure of the saturated reactor and facilitate press-fitting with thyristors, it is still based on... Figure 1 For example, in this embodiment of the invention, the first electrode plate 31 and the second electrode plate 32 are installed in parallel at both ends of the current guide column 2, serving as the top and bottom of the saturated reactor, forming the external frame of the saturated reactor, and playing the role of supporting and fixing the reactor body; at the same time, the first electrode plate 31 and the second electrode plate 32 are also the lead-out busbars of the saturated reactor, and the saturated reactor can be connected to the circuit by connecting with the first electrode plate 31 and the second electrode plate 32.

[0055] Two parallel first electrode plates 31 and second electrode plates 32 are connected by a current guide column 2. The current guide column 2 can be a single column or a multi-column parallel structure. The current guide column 2 is both a reactor winding and a support for the internal structure of the saturated reactor.

[0056] In this embodiment of the invention, the first electrode plate 31 and the second electrode plate 32 are adapted to the two ends of the thyristor. The first electrode plate 31 and the second electrode plate 32 are circular in structure. The first electrode plate 31 and the second electrode plate 32, which are parallel at both ends of the current guide column 2, can press the saturated reactor and the thyristor, which is similar to a disc, so as to facilitate fixation.

[0057] In this embodiment of the invention, the first electrode plate 31 and the second electrode plate 32 can be integrally formed with the flow guide column 2 of the same material or fixed by welding or other means; or the electrode plates 3 and the flow guide column 2 of different materials can be fixed by welding or other means.

[0058] The iron core 1 of the saturated reactor is directly connected across the current-conducting column 2. Each current-conducting column 2 can have multiple iron cores 1, and each iron core 1 can be wound with the current-conducting column 2 for single-turn or multi-turn coupling; alternatively, multiple current-conducting columns 2 can share the iron core 1. The iron core 1 is fixedly connected by brackets, supports, and / or insulating components.

[0059] The single current-guiding post 2 in this embodiment of the invention also has various structures, including but not limited to a cylinder, a cuboid, or a coil wound with several turns to increase the inductance of the wire. The current-guiding post 2 can be made of materials such as copper, pure aluminum, or stainless steel.

[0060] This embodiment provides three specific connection methods between the flow guide column 2 and the iron core 1, as shown below:

[0061] like Figure 3 As shown, in this embodiment of the invention, a guide column 2 is fixed between the first electrode plate 31 and the second electrode plate 32, and the guide column 2 is wound around the iron core 1 to form a coil structure. Figure 3 The structure of the coil, in terms of windings, can be a single winding or multiple strands wound in parallel; the number of turns can be single or multiple; the coupling method can also be arbitrarily combined, with all the iron core coupled to all the windings, or partial iron core coupled to partial windings. The form of multi-turn coils is shown in [reference needed]. Figure 2 The flow guide column structure is shown in the figure.

[0062] like Figure 4 As shown, in this embodiment, multiple flow guide columns 2 can be fixed between the first electrode plate 31 and the second electrode plate 32. The multiple flow guide columns 2 pass through the center of an entire iron core 1, and the iron core 1 closes around the multiple flow guide columns 2 around the center.

[0063] Multiple flow guide columns 2 are evenly distributed between the first electrode plate 31 and the second electrode plate 32. The distribution pattern can be matrix distribution, circular distribution or linear distribution.

[0064] like Figure 5 As shown, in this embodiment, multiple flow guide columns 2 can be fixed between the first electrode plate 31 and the second electrode plate 32, with each flow guide column 2 passing through multiple iron cores 1. The number of iron cores 1 is an integer multiple of 1, and the number of iron cores 1 connected in series on each flow guide column 2 is the same, with the iron cores 1 on multiple different flow guide columns 2 located on the same position plane; or, the number of iron cores 1 connected in series on each flow guide column 2 is different, with the iron cores 1 on multiple different flow guide columns 2 staggered. In this embodiment, the multiple flow guide columns 2 can be distributed in a matrix, circular, or linear pattern between the first electrode plate 31 and the second electrode plate 32.

[0065] Specifically, Figure 3 , Figure 4 , Figure 5 The document presents several typical core and winding structures. The core can be a single, continuous core or multiple smaller cores; the specific form depends on the required electrical parameters of the reactor. These three structures of saturated reactors can have identical external electrical parameters, but they differ in size, clamping force, and heat generation. A preferred form can be selected based on the specific application. In this embodiment, the electrical parameters of the entire saturated reactor can be adjusted by modifying the material, size, number, connection method, and distribution of the core 1, and / or the material, cross-sectional area, number, connection method, and distribution of the current-conducting columns 2, and / or the material, size, or connection method of the electrode plates 3.

[0066] Example 2:

[0067] This invention provides a saturated reactor, comprising an iron core 1, a current-conducting column 2, and an electrode plate 3. The electrode plate 3 in this invention includes a first electrode plate 31 and a second electrode plate 32.

[0068] The first electrode plate 31 and the second electrode plate 32 are respectively fixed at both ends of the guide column 2. The first electrode plate 31 and the second electrode plate 32 are made of conductive material and serve as the lead-out busbar of the saturated reactor 5. The iron core 1 and the guide column 2 are coupled through electromagnetic induction.

[0069] In this embodiment of the invention, the connection between the guide column 2 and the iron core 1 is not limited to the single connection method shown in Embodiment 1. Specifically, the following connection methods can be used:

[0070] In this embodiment of the invention, a guide column 2 is fixed between the first electrode plate 31 and the second electrode plate 32, and the guide column 2 is wound around the iron core 1 to form a coil structure. The guide column 2 extends downward, and the iron core 1 at the bottom closes around the guide column 2. When there are multiple guide columns 2, each guide column 2 can pass through one or more iron cores 1, or multiple guide columns 2 can pass through the center of an entire iron core 1, with the iron core 1 closing around the multiple guide columns 2 at the center, or either of these connection methods can be used, and the connection order is not limited.

[0071] In this embodiment of the invention, a plurality of flow guide columns 2 may be fixed between the first electrode plate 31 and the second electrode plate 32. The plurality of flow guide columns 2 pass through the center of an entire iron core 1, and the iron core 1 closes around the plurality of flow guide columns 2 at the center. The plurality of flow guide columns 2 extend downward and may be wound around the iron core 1 to form a coil structure, and then continue to extend, with each flow guide column 2 passing through one or more iron cores 1; or passing through the center of an entire iron core 1.

[0072] The embodiments of the present invention only list the connection methods of coupling the iron core 1 and the guide column 2 through electromagnetic induction. However, the connection methods between the iron core 1 and the guide column 2 are not limited to these few. Those skilled in the art can change the connection method according to actual needs. As long as the connection method of coupling the iron core 1 and the guide column 2 through electromagnetic induction is within the protection scope of the present invention, it will fall within the protection scope of the present invention.

[0073] Example 3:

[0074] Based on the same inventive concept, the present invention also provides a power electronic switch, including a thyristor 4 and a saturated reactor 5.

[0075] The saturated reactor 5 includes an iron core 1, a current-conducting column 2, a first electrode plate 31, and a second electrode plate 32.

[0076] The first electrode plate 31 and the second electrode plate 32 are respectively fixed at both ends of the guide column 2, and the iron core 1 is closed around the guide column 2, and / or the guide column 2 is wound around the iron core 1.

[0077] The first electrode plate 31 and the second electrode plate 32 serve as the lead-out busbars of the saturated reactor 5 and are electrically connected to the cathode or anode of the thyristor 4.

[0078] Because the saturated reactor in this embodiment of the invention has a simple structure, small size, and lower voltage level, it can be configured with a single thyristor and a single saturated reactor. The top and bottom of the saturated reactor can be considered as connecting busbars, and can be directly connected to adjacent thyristor devices. Therefore, it can be integrally press-fitted with power electronic devices such as thyristors. The contact in this embodiment of the invention includes direct contact or indirect contact. Indirect contact can be achieved using heat sinks or the like.

[0079] In this embodiment of the invention, the saturated reactor 5 can be press-fitted with the thyristor 4, thereby avoiding the problem of the hollow cylindrical saturated reactor in the prior art, where the two terminals are led out from one side and cannot be press-fitted. The reactor of this invention draws on the structure of power electronic devices. The top and bottom of the saturated reactor are both part of the structure and can also serve as lead-out busbars, thus enabling integral press-fitting with power electronic devices.

[0080] Specifically, in this embodiment of the invention, a power electronic switch further includes a heat sink 6; several heat sinks 6 are arranged at intervals, and a thyristor or saturated reactor is fixed between two adjacent heat sinks 6. In this embodiment... Figure 6 A schematic diagram of a press-fit structure is provided, in which the press-fit objects include thyristors 4, reactors, and heat sinks 6. The heat sinks 6 are arranged at intervals, with one thyristor 4 or one saturated reactor 5 placed between every two heat sinks 6. The contact surfaces of the thyristors 4, saturated reactors 5, and heat sinks 6 are all conductive. Electrical connection is achieved by bringing these contact surfaces into contact. In this embodiment, the heat sink 6 is a conventional heat sink for high-power electronic components, made of metal. The cathodes and anodes of the thyristors 4, as well as the busbars at both ends of the saturated reactors 5, can all be electrically connected by contacting the contact surfaces of the heat sink 6.

[0081] Specifically, the arrangement order of the thyristors 4 and saturated reactors 5 in this embodiment of the invention can be arbitrarily matched according to the electrical parameters of the thyristors 4 and saturated reactors 5: n thyristors 4 can be connected in series and then connected to m saturated reactors 5 in a cyclical pattern, where n and m are integers greater than or equal to 1. When m is greater than 1, the m saturated reactors are connected in series end to end; when n is greater than 1, the cathodes and anodes of the n thyristors 4 are stacked in sequence and connected in series, or they can be connected in series using wires; in this embodiment of the invention, all thyristors 4 can also be connected in series before connecting the saturated reactors 5.

[0082] Specifically, in this embodiment of the invention, the thyristor 4 and the saturated reactor 5 are press-fitted using a press-fitting structure, which includes a press-fitting end plate 7, an insulating pull rod 8, and a disc spring 9.

[0083] Both ends of the insulating pull rod 8 are fixed with press-fit end plates 7. The thyristor and saturated reactor are placed on one side of the press-fit end plate 7, and a disc spring 9 is fixed on the other side of the press-fit end plate 7. The disc spring 9 applies pressure to the thyristor 4 and the saturated reactor 5 for press-fitting. In this embodiment of the invention, the press-fitting objects are pressed by the press-fit end plate 7, the insulating pull rod 8, and the disc spring 9, thereby avoiding the problem that the saturated reactor 5 cannot be press-fitted in the prior art. The saturated reactor 5 in this embodiment of the invention has a similar structure to the thyristor 4, so it can be press-fitted as a whole, realizing a compact design of the converter valve. The electrical parameters of a single novel saturated reactor in this embodiment of the invention can be designed to match only one stage of thyristor devices, and the protection configuration of any stage of thyristors can be achieved by connecting the novel saturated reactors in series, making the design of the converter valve more flexible.

[0084] Conventional DC converter valve structures in the prior art typically involve multiple thyristors 4 configured with one saturated reactor. These reactors have high operating voltages and insulation levels, resulting in large weight and bulky size. In contrast, the saturated reactor in this invention is more compact and has a lower voltage level. It allows for a single thyristor 4 configured with a single saturated reactor 5, or multiple saturated reactors 5 connected in series to achieve the performance of a single saturated reactor. The saturated reactor structure in this invention allows for more flexible configuration of the saturated reactor and thyristors 4, facilitating modular structural design. In this embodiment, the first electrode plate 31 and the second electrode plate 32 at the top and bottom of the saturated reactor can both serve as connecting busbars, allowing for integral press-fitting with the thyristors 4 and the heat sink 6, thereby effectively reducing the overall size of the converter valve.

[0085] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A saturated reactor, characterized in that, Includes an iron core, a flow guide column, a first electrode plate, and a second electrode plate; The first electrode plate and the second electrode plate are respectively fixed to both ends of the flow guide column; The first electrode plate and the second electrode plate serve as the lead-out busbars of the saturated reactor; The iron core is closed around the guide post, and / or the guide post is wrapped around the iron core.

2. A saturated reactor according to claim 1, characterized in that, The guide column is wound around the iron core to form a coil structure, and the guide column is electromagnetically coupled to the iron core.

3. A saturated reactor according to claim 1, characterized in that, There are multiple guide columns, each of which passes through several iron cores, and the iron cores are closed around the corresponding guide column.

4. A saturated reactor according to claim 1, characterized in that, There are multiple flow guide columns, and the iron core is closed around the multiple flow guide columns.

5. A saturated reactor according to claim 3 or 4, characterized in that, The multiple guide columns are arranged in a matrix, circular, or linear pattern.

6. A saturated reactor according to claim 1, characterized in that, The first electrode plate and the second electrode plate are made of a metallic conductive material.

7. A saturated reactor according to claim 1, characterized in that, The first electrode plate and the second electrode plate have a circular structure.

8. A saturated reactor according to claim 1, characterized in that, The first electrode plate and the second electrode plate at both ends of the flow guide column are parallel to each other.

9. A power electronic switch, characterized in that, Includes thyristors and the saturated reactor as described in any one of claims 1 to 8; The lead-out busbar of the saturated reactor is electrically connected to the cathode or anode of the thyristor.

10. A power electronic switch according to claim 9, characterized in that, There are n thyristors and m saturated reactors; n and m are both integers not less than 1; when m is greater than 1, the m saturated reactors are connected end to end. The n thyristors are connected in series and then electrically connected to the busbars of the m saturated reactors.

11. A power electronic switch according to claim 9, characterized in that, It also includes heat sinks; several heat sinks are arranged at intervals, the thyristor or the saturated reactor is disposed between two adjacent heat sinks, the cathode or anode of the thyristor is in contact with the heat sink for electrical connection, and the lead busbar of the saturated reactor is in contact with the heat sink for electrical connection.

12. A power electronic switch according to claim 9, characterized in that, The thyristor and the saturated reactor are press-fitted using a press-fit structure.

13. A power electronic switch according to claim 12, characterized in that, The press-fit structure includes an insulating tie rod; Both ends of the insulating tie rod are fixed with press-fit end plates. The thyristor and the saturated reactor are placed on one side of the press-fit end plate, and a disc spring is fixed on the other side of the press-fit end plate. The disc spring applies pressure to the thyristor and the saturated reactor for press-fitting.

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