A three-phase reactor

Abstract

The utility model discloses a kind of three-phase reactors, including support module, three-phase winding, iron yoke module, filling module and fastening module, iron yoke module includes upper yoke unit and lower yoke unit, upper yoke unit and lower yoke unit all include the first yoke plate located in the front side of core column, the second yoke plate located in the back side of core column and three core rod members, the first yoke plate and the second yoke plate are transversely arranged to be respectively connected with each core column, each core rod member is one-to-one corresponding and is arranged in core column, first gasket is one-to-one corresponding and is stacked between the front side wall of core column and the board surface of first yoke plate, second gasket is one-to-one corresponding and is stacked between the back side wall of core column and the board surface of second yoke plate;First pull rod piece is vertically arranged and first pull rod piece is connected with winding support and first yoke plate, second pull rod piece is vertically arranged and second pull rod piece is connected with winding support and second yoke plate, the design structure is compact, improves anti-vibration grade, guarantees operating stability.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and in particular to a three-phase reactor. Background Technology

[0002] In the field of new energy, reactors are commonly used electronic components. Reactors are mainly used for power system regulation and filtering. They impede current changes through the principle of electromagnetic induction and have the characteristics of passing DC and blocking AC. They play an important role in the power system. Therefore, the structural stability of reactors is crucial.

[0003] In existing reactors, the winding unit is mounted on a winding support, the core column is vertically inserted into the winding support, and the coil winding is wound on the winding support so that it can be sleeved on the core column. The upper and lower ends of the core column can be connected by an upper yoke and a lower yoke set on the winding support. However, since the core column and the coil winding need to be separated to ensure sufficient electrical insulation distance, there will also be connection gaps between the upper yoke and the core column, and between the lower yoke and the core column. When a large-intensity airflow acts on the winding support, the reactor may vibrate, resulting in unstable operation of the reactor. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a three-phase reactor with a compact structure, improved seismic resistance, and guaranteed operational stability.

[0005] A three-phase reactor according to a first aspect of the present invention includes: a support module comprising three winding supports arranged side by side; a three-phase winding comprising three winding units, each winding unit comprising a core post and a coil winding, the core post being vertically inserted into the winding supports, and the coil winding being wound on the winding supports to be sleeved on the core post; and a yoke module comprising an upper yoke unit and a lower yoke unit, the upper yoke unit being located above the winding supports, and the lower yoke unit being located below the winding supports. Both the upper and lower yoke units include a first yoke plate located in front of the core post, a second yoke plate located behind the core post, and three through-core rods. The first and second yoke plates are horizontally positioned to correspond to each of the core posts. Each through-core rod is inserted one-to-one through the core post, and the first end of each through-core rod is connected to the first yoke plate, and the tail end of each through-core rod... The system includes a filling module comprising multiple insulating first gaskets and multiple insulating second gaskets, wherein the first gaskets are stacked one-to-one between the front sidewall of the core column and the surface of the first yoke, and the second gaskets are stacked one-to-one between the rear sidewall of the core column and the surface of the second yoke; and a fastening module comprising at least one first tie rod and at least one second tie rod, wherein the first tie rod is vertically arranged and connected to the winding support, the top end of the first tie rod is connected to the first yoke of the upper yoke unit, and the bottom end of the first tie rod is connected to the first yoke of the lower yoke unit; the second tie rod is vertically arranged and connected to the winding support, the top end of the second tie rod is connected to the second yoke of the upper yoke unit, and the bottom end of the second tie rod is connected to the second yoke of the lower yoke unit.

[0006] A three-phase reactor according to an embodiment of the present utility model has at least the following beneficial effects: This utility model relates to a three-phase reactor. Both the upper and lower yoke units are connected to the core columns of each phase winding unit via horizontally placed first and second yoke plates spanning multiple winding units. An insulating first gasket is stacked between the first yoke plate and the core column, and an insulating second gasket is stacked between the second yoke plate and the core column, filling the gaps between the core column and the first and second yoke plates while ensuring sufficient electrical insulation distance. Furthermore, first tie rods connect the upper and lower first yoke plates to the winding supports, and second tie rods connect the upper and lower second yoke plates to the winding supports. All components are tightly connected, resulting in a compact design that improves seismic resistance and ensures operational stability.

[0007] According to some embodiments of the present invention, the first pad extends along the height direction of the core column, such that the same first pad is stacked between the front sidewall of the core column and the surface of the first yoke plate of the upper yoke unit, and between the front sidewall of the core column and the surface of the first yoke plate of the lower yoke unit.

[0008] According to some embodiments of the present invention, the thicknesses of different first gaskets may be partially the same, all the same, or all different; the thicknesses of different second gaskets may be partially the same, all the same, or all different.

[0009] According to some embodiments of the present invention, both ends of the through-core rod are provided with external thread structures. The first nut is connected to the external thread structure at the beginning of the through-core rod and the first nut presses against the first washer so that the beginning of the through-core rod is connected to the first yoke plate. The second nut is connected to the external thread structure at the end of the through-core rod and the second nut presses against the second washer so that the end of the through-core rod is connected to the second yoke plate.

[0010] According to some embodiments of the present invention, there are two first tie rods, and the two first tie rods are respectively located between two adjacent winding supports in two groups of the three winding supports; there are two second tie rods, and the two second tie rods are respectively located between two adjacent winding supports in two groups of the three winding supports.

[0011] According to some embodiments of this utility model, the first yoke plate has a first rib plate protruding from its surface. The first rib plate has a first mounting hole. The first tie rod passes through the first mounting holes of the upper and lower first rib plates. Both ends of the first tie rod have external thread structures. The first tension nut is connected to the external thread structure at the head end of the first tie rod and presses against the surface of the upper first rib plate. The second tension nut is connected to the external thread structure at the tail end of the first tie rod and presses against the surface of the lower first rib plate.

[0012] According to some embodiments of the present invention, the fastening module further includes at least one first connecting rib plate, the first connecting rib plate being connected to the outer surfaces of two adjacent winding supports respectively, the first connecting rib plate being located between the upper and lower first convex rib plates, the first connecting rib plate having a first connecting hole, and the first tie rod being inserted through the first connecting hole.

[0013] According to some embodiments of this utility model, the second yoke plate has a second rib plate protruding from its surface. The second rib plate has a second mounting hole. The second tie rod passes through the second mounting holes of the upper and lower second rib plates. Both ends of the second tie rod have external thread structures. The third tension nut is connected to the external thread structure at the head end of the second tie rod and presses against the surface of the upper second rib plate. The fourth tension nut is connected to the external thread structure at the tail end of the second tie rod and presses against the surface of the lower second rib plate. The fastening module also includes at least one second connecting rib plate. The second connecting rib plate is connected to the outer surface of two adjacent winding supports respectively. The second connecting rib plate is located between the upper and lower second rib plates. The second connecting rib plate has a second connecting hole, and the second tie rod passes through the second connecting hole.

[0014] According to some embodiments of the present invention, the three-phase reactor further includes two legs, which are located on the left and right sides of the yoke module, respectively. One leg is connected to the first end of the first yoke plate and the first end of the second yoke plate in the lower yoke unit, and the other leg is connected to the tail end of the first yoke plate and the tail end of the second yoke plate in the lower yoke unit.

[0015] According to some embodiments of the present invention, the ends of the first yoke plate and the second yoke plate are provided with insert blocks, and the legs are provided with at least two sockets. The insert blocks are correspondingly inserted into the sockets so that the legs are respectively connected to the first yoke plate and the second yoke plate.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a perspective view of one embodiment of the three-phase reactor of this utility model; Figure 2 for Figure 1 Cross-sectional view of section AA of one embodiment of the three-phase reactor of this utility model; Figure 3 This is a three-dimensional schematic diagram from another perspective of one embodiment of the three-phase reactor of this utility model; Figure 4 This is a schematic diagram of the assembly structure of one embodiment of the three-phase reactor of this utility model.

[0018] Figure label: Winding bracket 100; core post 210; coil winding 220; upper yoke unit 310; lower yoke unit 320; first yoke plate 330; first rib plate 331; first mounting hole 332; second yoke plate 340; through-core rod 350; first nut 351; second nut 352; insert block 360; first washer 410; second washer 420; first tie rod 510; first tension nut 511; second tension nut 512; first connecting rib plate 513; first connecting hole 514; second tie rod 520; leg 600; socket 610. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be understood that the directional descriptions, such as the terms "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0021] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] like Figures 1 to 4As shown, a three-phase reactor according to a first aspect embodiment of the present invention includes a support module, three-phase windings, a yoke module, a filling module, and a fastening module. The support module includes three winding supports 100 arranged side by side. The three-phase windings include three winding units, each winding unit including a core post 210 and a coil winding 220. The core post 210 is vertically inserted into the winding support 100, and the coil winding 220 is wound on the winding support 100 to fit over the core post 210. The yoke module includes an upper yoke unit 310 and a lower yoke unit 320. The upper yoke unit 310... Located above the winding support 100, the lower yoke unit 320 is located below the winding support 100. Both the upper yoke unit 310 and the lower yoke unit 320 include a first yoke plate 330 located on the front side of the core post 210, a second yoke plate 340 located on the rear side of the core post 210, and three core-passing rods 350. The first yoke plate 330 and the second yoke plate 340 are horizontally positioned to correspond to each of the core posts 210. Each core-passing rod 350 is inserted into a core post 210 in a one-to-one correspondence, and the head end of each core-passing rod 350 is connected to the first yoke plate 330. The tail end of the core rod 350 is connected to the second yoke plate 340; the filling module includes multiple insulating first gaskets 410 and multiple insulating second gaskets 420, the first gaskets 410 are stacked one-to-one between the front sidewall of the core post 210 and the plate surface of the first yoke plate 330, and the second gaskets 420 are stacked one-to-one between the rear sidewall of the core post 210 and the plate surface of the second yoke plate 340; the fastening module includes at least one first pull rod 510 and at least one second pull rod 520, the first pull rod 510 is vertically arranged and the first pull rod 52 ... The first tie rod 510 is connected to the winding support 100. The top end of the first tie rod 510 is connected to the first yoke plate 330 of the upper yoke unit 310, and the bottom end of the first tie rod 510 is connected to the first yoke plate 330 of the lower yoke unit 320. The second tie rod 520 is vertically arranged and connected to the winding support 100. The top end of the second tie rod 520 is connected to the second yoke plate 340 of the upper yoke unit 310, and the bottom end of the second tie rod 520 is connected to the second yoke plate 340 of the lower yoke unit 320.

[0024] The winding support 100 can be cylindrical, and its cross-section can be circular or polygonal. The core post 210 is vertically inserted into the central channel of the winding support 100. The inner wall of the winding support 100 can be provided with mounting ribs to limit the winding position of the coil winding 220, so that the coil winding 220 is wound on the core post 210 and has sufficient isolation distance from the outer peripheral wall of the core post 210.

[0025] In some embodiments of this utility model, the first gasket 410 and the second gasket 420 can both be composed of one or more of stainless steel plates and silicon plates.

[0026] In this utility model of a three-phase reactor, the upper yoke unit 310 and the lower yoke unit 320 are both connected to the core column 210 of each phase winding unit by horizontally placed first yoke plates 330 and second yoke plates 340, spanning multiple winding units. An insulating first gasket 410 is stacked between the first yoke plate 330 and the core column 210, and an insulating second gasket 420 is stacked between the second yoke plate 340 and the core column 210, filling the gaps between the core column 210 and the first yoke plate 330 and the second yoke plate 340, while ensuring sufficient electrical insulation distance. In addition, the upper and lower first yoke plates 330 are connected to the winding support 100 by first tie rods 510, and the upper and lower second yoke plates 340 are connected to the winding support 100 by second tie rods 520. All components are tightly connected to each other. This design has a compact structure, improves seismic resistance, and ensures operational stability.

[0027] In some embodiments of this utility model, such as Figure 2 , 4 As shown, the first pad 410 extends along the height direction of the core column 210, such that the same first pad 410 is stacked between the front sidewall of the core column 210 and the surface of the first yoke plate 330 of the upper yoke unit 310, and between the front sidewall of the core column 210 and the surface of the first yoke plate 330 of the lower yoke unit 320.

[0028] Generally speaking, the spacing between the sidewalls of the coil winding 220 and the core column 210 in the vertical direction is consistent. Therefore, the first pad 410 extends along the height direction of the core column 210, which can ensure that the spacing between the plate surface of the first yoke plate 330 of the upper yoke unit 310 and the front sidewall of the core column 210, as well as the spacing between the plate surface of the first yoke plate 330 of the lower yoke unit 320 and the front sidewall of the core column 210, is consistent, and the overall connection is not prone to tilting.

[0029] Similarly, in some embodiments of the present invention, the second pad 420 extends along the height direction of the core post 210, such that the same second pad 420 is stacked between the rear sidewall of the core post 210 and the surface of the second yoke plate 340 of the upper yoke unit 310, and between the rear sidewall of the core post 210 and the surface of the second yoke plate 340 of the lower yoke unit 320.

[0030] In some embodiments of this utility model, the thicknesses of different first gaskets 410 are partially the same, all the same, or all different; the thicknesses of different second gaskets 420 are partially the same, all the same, or all different.

[0031] Since the spacing between the core post 210 and the first yoke plate 330 or the second yoke plate 340 in different phases may not be the same, the first gasket 410 of different phases may be the same or different. Similarly, the second gasket 420 of different phases may be the same or different. Specifically, multiple first gaskets 410 of the same or different thicknesses may be stacked between the core post 210 and the first yoke plate 330 to adapt to different spacings. Similarly, multiple second gaskets 420 of the same or different thicknesses may be stacked between the core post 210 and the second yoke plate 340 to adapt to different spacings.

[0032] In some embodiments of this utility model, such as Figure 2 As shown, both ends of the through rod 350 are provided with external thread structures. The first nut 351 is connected to the external thread structure at the beginning of the through rod 350 and the first nut 351 presses against the first washer 410 so that the beginning of the through rod 350 is connected to the first yoke 330. The second nut 352 is connected to the external thread structure at the end of the through rod 350 and the second nut 352 presses against the second washer 420 so that the end of the through rod 350 is connected to the second yoke 340.

[0033] The first nut 351 and the second nut 352 are respectively connected to the core rod 350, so that the first yoke plate 330, the first washer 410, the core column 210, the second washer 420 and the second yoke plate 340 are tightly attached in sequence, ensuring a tight connection.

[0034] In some embodiments of this utility model, such as Figure 1 , 3 As shown, there are two first tie rods 510, and the two first tie rods 510 are respectively located between two adjacent winding supports 100 in two groups of the three winding supports 100. There are two second tie rods 520, and the two second tie rods 520 are respectively located between two adjacent winding supports 100 in two groups of the three winding supports 100.

[0035] Understandably, there are three winding supports 100, arranged in a straight line along the left and right direction. In front of the core column 210, a vertically arranged first tie rod 510 can be provided between each pair of adjacent winding supports 100, and the first tie rod 510 is connected to the two adjacent winding supports 100 respectively. Similarly, behind the core column 210, a vertically arranged second tie rod 520 can be provided between each pair of adjacent winding supports 100, and the second tie rod 520 is connected to the two adjacent winding supports 100 respectively, thereby ensuring the overall structural stability.

[0036] In some embodiments of this utility model, the first yoke plate 330 has a first rib plate 331 protruding from its surface. The first rib plate 331 has a first mounting hole 332. The first tie rod 510 passes through the first mounting holes 332 of the upper and lower first rib plates 331. Both ends of the first tie rod 510 are provided with external thread structures. The first tension nut 511 is connected to the external thread structure at the head end of the first tie rod 510 and the first tension nut 511 abuts against the surface of the upper first rib plate 331. The second tension nut 512 is connected to the external thread structure at the tail end of the first tie rod 510 and the second tension nut 512 abuts against the surface of the lower first rib plate 331.

[0037] The first rib plate 331 can be set on the plate surface of the first yoke plate 330 on the side away from the core column 210, or it can be set on the plate surface of the first yoke plate 330 on the side close to the core column 210. However, for the convenience of workers, it is usually set on the plate surface on the side away from the core column 210, and the first rib plate 331 is located at the interval between two adjacent winding supports 100.

[0038] In some embodiments of this utility model, the fastening module further includes at least one first connecting rib plate 513. The first connecting rib plate 513 is connected to the outer surface of two adjacent winding supports 100 respectively. The first connecting rib plate 513 is located between the upper and lower first convex rib plates 331. The first connecting rib plate 513 has a first connecting hole 514, and the first tie rod 510 passes through the first connecting hole 514.

[0039] The first connecting stiffener 513 has a certain thickness. The two sides of the first connecting stiffener 513 can be welded to the outer surfaces of two adjacent winding supports 100 respectively. There can be multiple first connecting stiffeners 513. Multiple first connecting stiffeners 513 can be located between two groups of two adjacent winding supports 100 in the three winding supports 100. Multiple first connecting stiffeners 513 can also be arranged at intervals along the height direction between two adjacent winding supports 100 in the same group. The inner peripheral wall of the first connecting hole 514 and the outer peripheral wall of the first tie rod 510 are approximately close to each other to ensure a compact and stable connection.

[0040] In some embodiments of this utility model, the second yoke 340 has a second rib plate protruding from its surface. The second rib plate has a second mounting hole. The second tie rod 520 passes through the second mounting holes of the upper and lower second rib plates. Both ends of the second tie rod 520 have external thread structures. The third tension nut is connected to the external thread structure at the head end of the second tie rod 520 and presses against the surface of the upper second rib plate. The fourth tension nut is connected to the external thread structure at the tail end of the second tie rod 520 and presses against the surface of the lower second rib plate. The fastening module also includes at least one second connecting rib plate. The second connecting rib plate is connected to the outer surface of two adjacent winding supports 100 respectively. The second connecting rib plate is located between the upper and lower second rib plates. The second connecting rib plate has a second connecting hole, and the second tie rod 520 passes through the second connecting hole.

[0041] Similarly, the second rib plate can be disposed on the plate surface of the second yoke plate 340 on the side away from the core post 210, or it can be disposed on the plate surface of the second yoke plate 340 on the side close to the core post 210, and the second rib plate is located at the interval between two adjacent winding supports 100.

[0042] The second connecting stiffener has a certain thickness. The two sides of the second connecting stiffener can be welded to the outer surfaces of two adjacent winding supports 100 respectively. There can be multiple second connecting stiffeners. Multiple second connecting stiffeners can be located between two groups of two adjacent winding supports 100 in the three winding supports 100. Multiple second connecting stiffeners can also be arranged at intervals along the height direction between two adjacent winding supports 100 in the same group. The inner peripheral wall of the second connecting hole and the outer peripheral wall of the second tie rod 520 are approximately close to each other to ensure a compact and stable connection.

[0043] In some embodiments of this utility model, such as Figure 1 , 2As shown in Figure 4, the three-phase reactor also includes two legs 600, which are located on the left and right sides of the yoke module, respectively. One leg 600 is connected to the head end of the first yoke plate 330 and the head end of the second yoke plate 340 in the lower yoke unit 320, respectively, and the other leg 600 is connected to the tail end of the first yoke plate 330 and the tail end of the second yoke plate 340 in the lower yoke unit 320.

[0044] The stand 600 can be used to support the entire three-phase reactor, and the stand 600 is connected to the first yoke 330 and the second yoke 340 respectively, further ensuring the stability of the structure.

[0045] Specifically, each end of the first yoke plate 330 and the second yoke plate 340 is provided with a plug 360, and the leg 600 is provided with at least two sockets 610. The plug 360 is correspondingly inserted into the socket 610 so that the leg 600 is connected to the first yoke plate 330 and the second yoke plate 340 respectively. The plug 360 extends along the plane of the first yoke plate 330 or the second yoke plate 340. After the plug 360 is inserted into the socket 610, the workers can perform welding, so that the structure is firm and stable.

[0046] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A three-phase reactor, characterized in that, include: The support module includes three winding supports arranged side by side; The three-phase winding includes three winding units. Each winding unit includes a core post and a coil winding. The core post is vertically inserted into the winding support, and the coil winding is wound on the winding support to be sleeved on the core post. The yoke module includes an upper yoke unit and a lower yoke unit. The upper yoke unit is located above the winding support, and the lower yoke unit is located below the winding support. Both the upper yoke unit and the lower yoke unit include a first yoke plate located on the front side of the core column, a second yoke plate located on the rear side of the core column, and three core-passing rods. The first yoke plate and the second yoke plate are horizontally positioned to correspond to each of the core columns. Each core-passing rod is inserted through the core column in a one-to-one correspondence, and the first end of the core-passing rod is connected to the first yoke plate, and the tail end of the core-passing rod is connected to the second yoke plate. The filling module includes multiple insulating first gaskets and multiple insulating second gaskets. The first gaskets are stacked one-to-one between the front sidewall of the core column and the surface of the first yoke plate, and the second gaskets are stacked one-to-one between the rear sidewall of the core column and the surface of the second yoke plate. The fastening module includes at least one first tie rod and at least one second tie rod. The first tie rod is vertically arranged and connected to the winding bracket. The top end of the first tie rod is connected to the first yoke plate of the upper yoke unit, and the bottom end of the first tie rod is connected to the first yoke plate of the lower yoke unit. The second tie rod is vertically arranged and connected to the winding bracket. The top end of the second tie rod is connected to the second yoke plate of the upper yoke unit, and the bottom end of the second tie rod is connected to the second yoke plate of the lower yoke unit.

2. A three-phase reactor according to claim 1, characterized in that: The first pad extends along the height direction of the core column, such that the same first pad is stacked between the front sidewall of the core column and the surface of the first yoke plate of the upper yoke unit, and between the front sidewall of the core column and the surface of the first yoke plate of the lower yoke unit.

3. A three-phase reactor according to claim 1, characterized in that: The thickness of different first gaskets may be partially the same, completely the same, or completely different; the thickness of different second gaskets may be partially the same, completely the same, or completely different.

4. A three-phase reactor according to claim 1, characterized in that: Both ends of the core rod are provided with external thread structures. The first nut is connected to the external thread structure at the beginning of the core rod and presses against the first washer so that the beginning of the core rod is connected to the first yoke plate. The second nut is connected to the external thread structure at the end of the core rod and presses against the second washer so that the end of the core rod is connected to the second yoke plate.

5. A three-phase reactor according to claim 1, characterized in that: There are two first tie rods, and the two first tie rods are respectively located between two adjacent winding supports in two groups of the three winding supports. There are two second tie rods, and the two second tie rods are respectively located between two adjacent winding supports in two groups of the three winding supports.

6. A three-phase reactor according to claim 1, characterized in that: The first yoke plate has a first rib plate protruding from its surface. The first rib plate has a first mounting hole. The first tie rod passes through the first mounting holes of the upper and lower first rib plates. Both ends of the first tie rod have external threads. The first tension nut is connected to the external thread structure at the head end of the first tie rod and presses against the surface of the upper first rib plate. The second tension nut is connected to the external thread structure at the tail end of the first tie rod and presses against the surface of the lower first rib plate.

7. A three-phase reactor according to claim 6, characterized in that: The fastening module further includes at least one first connecting stiffener plate, which is connected to the outer surface of two adjacent winding brackets respectively. The first connecting stiffener plate is located between the upper and lower first convex stiffener plates. The first connecting stiffener plate has a first connecting hole, and the first tie rod is inserted through the first connecting hole.

8. A three-phase reactor according to claim 1, characterized in that: The second yoke plate has a second rib plate protruding from its surface. The second rib plate has a second mounting hole. The second tie rod passes through the second mounting holes of the upper and lower second rib plates. Both ends of the second tie rod have external threads. The third tension nut is connected to the external thread structure at the head end of the second tie rod and presses against the surface of the upper second rib plate. The fourth tension nut is connected to the external thread structure at the tail end of the second tie rod and presses against the surface of the lower second rib plate. The fastening module also includes at least one second connecting rib plate. The second connecting rib plate is connected to the outer surface of two adjacent winding supports. The second connecting rib plate is located between the upper and lower second rib plates. The second connecting rib plate has a second connecting hole, through which the second tie rod passes.

9. A three-phase reactor according to claim 1, characterized in that: It also includes two legs, which are located on the left and right sides of the yoke module, respectively. One leg is connected to the first end of the first yoke plate and the first end of the second yoke plate in the lower yoke unit, and the other leg is connected to the tail end of the first yoke plate and the tail end of the second yoke plate in the lower yoke unit.

10. A three-phase reactor according to claim 9, characterized in that: Both the first yoke and the second yoke are provided with insert blocks at their ends. The legs are provided with at least two sockets, and the insert blocks are correspondingly inserted into the sockets so that the legs are connected to the first yoke and the second yoke respectively.

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