Multi-magnetic-core fixing structure and transformer

Abstract

The utility model provides a multi-magnetic-core fixing structure and a transformer, and relates to the field of transformers. A fixing structure for multiple magnetic cores comprises a fixing shaft, a fixing shell and a fixing end cover, and a plurality of first positioning assemblies are arranged on the fixing shaft at intervals in the axial direction and used for isolating and positioning the multiple magnetic cores; the fixed shell is matched with the fixed shaft and is used for fixing the plurality of magnetic cores between the fixed shaft and the fixed shell; a plurality of second positioning assemblies are arranged on the inner wall of the fixed shell in the axial direction and used for isolating and positioning the multiple magnetic cores, and the multiple first positioning assemblies and the multiple second positioning assemblies are arranged in a one-to-one correspondence mode; the fixed end covers are fixed to the two ends of the fixed shell, and the fixed shaft is sealed in the fixed shell. Multiple positioning can be performed on a plurality of magnetic cores so as to ensure accurate positioning and fixing of the plurality of magnetic cores, so that uniformity and stability of relative positions of coil winding are ensured, consistency of electromagnetic and magnetoelectric coupling time of the coil is improved, and corresponding functions of the coil are optimized.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of transformers, in particular to a fixing structure of multiple magnetic cores and a transformer. BACKGROUND

[0002] Linear Transformer Driver (LTD) technology is a relatively new type of pulse power technology, which is used in many fields. In particular, in the field of steep pulse electric field ablation, the pulse power device of LTD technology has been more widely used. The core part is the superposition of multiple magnetic cores and the winding of coils, and the fixing structure and assembly process are key factors affecting performance.

[0003] At present, due to the inaccuracy and irrationality of the fixing structure and assembly process, the electromagnetic and magneto-electric coupling time of the coil may be inconsistent, and the corresponding function cannot be optimal. CONTENT OF THE INVENTION

[0004] The purpose of the present application is to provide a fixing structure of multiple magnetic cores and a transformer to improve the technical problem that the inaccuracy and irrationality of the fixing structure and assembly process of multiple magnetic cores may lead to inconsistent electromagnetic and magneto-electric coupling time of the coil, affecting the corresponding function.

[0005] In a first aspect, the embodiments of the present application provide a fixing structure of multiple magnetic cores, comprising a fixing shaft, a fixing shell and a fixing end cover, a plurality of first positioning components are arranged on the fixing shaft in an axial direction and are used for isolating and positioning the multiple magnetic cores; the fixing shell cooperates with the fixing shaft and is used for fixing the multiple magnetic cores between the fixing shaft and the fixing shell; a plurality of second positioning components are arranged on the inner wall of the fixing shell in an axial direction and are used for isolating and positioning the multiple magnetic cores, the plurality of first positioning components and the plurality of second positioning components are arranged one by one in correspondence; the fixing end cover is fixed at both ends of the fixing shell and encloses the fixing shaft in the fixing shell.

[0006] In the above implementation process, by arranging a plurality of first positioning components on the fixing shaft in an axial direction and a plurality of second positioning components on the inner wall of the fixing shell in an axial direction, and arranging the plurality of first positioning components and the plurality of second positioning components one by one in correspondence, the multiple magnetic cores can be positioned multiple times by the cooperation of the first positioning components and the second positioning components, so as to ensure accurate positioning and fixing of the multiple magnetic cores, thereby ensuring the uniformity and stability of the relative position of the coil winding, improving the consistency of the electromagnetic and magneto-electric coupling time of the coil, and optimizing the corresponding function.

[0007] In a possible implementation manner, each first positioning component comprises a positioning hole and a positioning column, a plurality of positioning holes are arranged on the fixing shaft in an axial direction, an end of the positioning column is inserted into the positioning hole, and the other end extends outward between the adjacent two magnetic cores.

[0008] The application is characterized in that a plurality of positioning holes are arranged on the fixed shaft in the axial direction, and a positioning column is arranged in each positioning hole; when the plurality of magnetic cores are fixed, the plurality of magnetic cores are sleeved on the fixed shaft, and each positioning column is arranged between two adjacent magnetic cores, that is, each magnetic core is clamped between two adjacent positioning columns, so that the plurality of magnetic cores are positioned.

[0009] In a possible implementation, the magnetic core is a circular magnetic ring, and the plurality of circular magnetic rings are used to be sleeved on the fixed shaft in the axial direction of the fixed shaft; the positioning column is clamped between two adjacent circular magnetic rings; in the radial direction of the fixed shaft, the length direction of the positioning column extends in the thickness direction of the circular magnetic ring, and the length of the positioning column is not greater than the thickness of the circular magnetic ring.

[0010] When the plurality of magnetic cores are fixed, the plurality of magnetic cores are sleeved on the fixed shaft, and the length direction of the positioning column extends in the thickness direction of the circular magnetic ring, so that the positioning column is clamped between two adjacent magnetic cores to position the magnetic core; at the same time, the length of the positioning column is not greater than the thickness of the circular magnetic ring, so that the fixed shell is fixed outside the magnetic core, and the plurality of magnetic cores are fixed between the fixed shaft and the fixed shell.

[0011] In a possible implementation, each second positioning assembly comprises a positioning groove and a positioning rib arranged adjacent to each other, the positioning groove is used to accommodate the outer wall of the circular magnetic ring, and the positioning rib is used to be arranged between two adjacent circular magnetic rings.

[0012] When the fixed shell is fixed outside the circular magnetic ring, each positioning groove corresponds to each circular magnetic ring, the outer wall of one circular magnetic ring is accommodated in one positioning groove, so that the plurality of circular magnetic rings are positioned in two levels; at the same time, the positioning rib corresponds to the gap between two adjacent circular magnetic rings, that is, corresponds to the positioning column, and one positioning rib is clamped in the gap between two adjacent circular magnetic rings, so that the plurality of circular magnetic rings are positioned in three levels.

[0013] In a possible implementation, a plurality of first wire grooves are arranged on the outer wall of the fixed shaft, the first wire grooves extend in the axial direction of the fixed shaft and are in communication with the outside, and the plurality of first wire grooves are arranged on the outer wall of the fixed shaft in the circumferential direction.

[0014] The plurality of first wire grooves are arranged on the outer wall of the fixed shaft, which is beneficial to the fixing of the electrode wire on the circular magnetic ring, and the circular magnetic ring is sleeved on the fixed shaft, the electrode wire is clamped in the first wire groove on the outer wall of the fixed shaft, so that the electrode wire can tightly contact the circular magnetic ring, which is beneficial to optimizing the function.

[0015] In a possible implementation, the inner wall of the fixed shell is provided with a plurality of second wire grooves in the axial direction, the second wire grooves extend in the axial direction of the fixed shaft and are in communication with the outside, and the plurality of second wire grooves are arranged in the circumferential direction of the inner wall of the fixed shell.

[0016] The application is also conducive to fixing the electrode wires on the circular magnetic ring by arranging a plurality of second wire grooves in the axial direction of the inner wall of the fixed shell, and the fixed shell is fixed outside the circular magnetic ring, the electrode wires are clamped in the second wire grooves on the inner wall of the fixed shell, so that the electrode wires can be tightly attached to the circular magnetic ring, thereby optimizing the function.

[0017] In a possible implementation, a plurality of wire passing holes are formed in the fixed end cover, and a part of the plurality of wire passing holes is in communication with the first wire groove, and another part is in communication with the second wire groove.

[0018] The application can make the electrode wires fixed in the first wire groove and the second wire groove pass through the corresponding wire passing holes and be connected to the outside.

[0019] In a possible implementation, the fixed shell includes a first shell and a second shell, the cross sections of the first shell and the second shell are both semicircular arc structures, and the first shell and the second shell are adaptively combined to form a cylindrical structure.

[0020] The application can assemble the first shell and the second shell together to form the fixed shell with a cylindrical structure, so as to facilitate fixing and disassembling.

[0021] In a possible implementation, the first shell and the second shell are provided with foolproof structures in the radial direction.

[0022] The application can quickly match and fix the first shell and the second shell in the radial direction of the first shell and the second shell during installation, thereby facilitating use and operation.

[0023] In a second aspect, the application provides a transformer, including a plurality of magnetic cores and the fixed structure of the plurality of magnetic cores provided in the first aspect; the plurality of magnetic cores are sleeved on the fixed shaft, the fixed shell is fixed to the outer wall of the plurality of magnetic cores, and the fixed end cover is fixed to the two ends of the fixed shell; one magnetic core is clamped in the positioning groove of one second positioning assembly, and the positioning column of one first positioning assembly and the positioning rib of one second positioning assembly are both clamped in the gap between the adjacent two magnetic cores; the primary winding on the magnetic core is clamped in the first wire groove on the outer wall of the fixed shaft, the secondary winding on the magnetic core is clamped in the second wire groove on the inner wall of the fixed shell, and the primary winding and the secondary winding pass through the wire passing holes on the fixed end cover.

[0024] The application sets multiple magnetic cores on a fixed shaft, a fixed column is arranged between two adjacent magnetic cores to position the magnetic cores in the first level, a fixed shell is fixed on the outer wall of the multiple magnetic cores, a positioning groove on the inner wall of the fixed shell accommodates a magnetic core to position the magnetic cores in the second level, and the positioning ribs adjacent to the positioning groove are arranged between two adjacent magnetic cores to position the magnetic cores in the third level, so that the multiple magnetic cores are accurately positioned and fixed, the relative position uniformity and stability of the coil winding are ensured, the consistency of the coil electromagnetic and magneto-electric coupling time is improved, meanwhile, the primary winding on the magnetic core is arranged in the first wire slot on the outer wall of the fixed shaft, and the secondary winding on the magnetic core is arranged in the second wire slot on the inner wall of the fixed shell, so that the primary winding and the secondary winding can tightly adhere to the magnetic core, and the corresponding functions can be effectively optimized by cooperating with the multiple positioning of the magnetic cores. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor.

[0026] Figure 1 The exploded view of the fixed structure of the multiple magnetic cores provided by the embodiments of the application.

[0027] Figure 2 The radial cross-sectional view of the fixed structure of the multiple magnetic cores provided by the embodiments of the application.

[0028] Figure 3 The axial cross-sectional view of the transformer provided by the embodiments of the application.

[0029] Figure legend: 1-fixed shaft; 11-positioning column; 12-first wire slot; 2-fixed shell; 21-first shell; 22-second shell; 23-positioning groove; 24-positioning rib; 25-second wire slot; 3-fixed end cover; 31-threading hole; 4-magnetic core. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the application more clear, the following will combine the drawings in the embodiments of the application to clearly and completely describe the technical solutions in the embodiments of the application, obviously, the described embodiments are some of the embodiments of the application, not all the embodiments. The components of the embodiments of the application described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application as claimed, but merely represents selected embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the application.

[0032] It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0033] In the description of the application, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed, only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0034] In addition, the terms "horizontal", "vertical", "overhanging", etc. do not mean that the parts must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0035] In the description of the application, it should also be noted that unless otherwise explicitly specified and limited, the terms "provided", "mounted", "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0036] Example 1

[0037] At present, due to the inaccurate and unreasonable fixed structure and assembly process of multiple magnetic cores, the inconsistency of coil electromagnetic and magneto-electric coupling time may occur, and the corresponding function cannot achieve the best.

[0038] The application intends to improve the technical problem that the inconsistency of coil electromagnetic and magneto-electric coupling time may occur due to the inaccurate and unreasonable fixed structure and assembly process of multiple magnetic cores, which affects the corresponding function, and proposes a fixed structure of multiple magnetic cores, such as Figure 1As shown, it comprises a fixed shaft 1, a fixed shell 2 and a fixed end cover 3, a plurality of first positioning assemblies are arranged on the fixed shaft 1 in an axial direction, for isolating and positioning a plurality of magnetic cores 4; the fixed shell 2 cooperates with the fixed shaft 1, for fixing the plurality of magnetic cores 4 between the fixed shaft 1 and the fixed shell 2; a plurality of second positioning assemblies are arranged on the inner wall of the fixed shell 2 in an axial direction, for isolating and positioning the plurality of magnetic cores 4, the plurality of first positioning assemblies and the plurality of second positioning assemblies are arranged one-to-one; the fixed end cover 3 is fixed at both ends of the fixed shell 2, and the fixed shaft 1 is enclosed in the fixed shell 2.

[0039] A plurality of first positioning assemblies are arranged on the fixed shaft 1 in an axial direction, a plurality of second positioning assemblies are arranged on the inner wall of the fixed shell 2 in an axial direction, and the plurality of first positioning assemblies and the plurality of second positioning assemblies are arranged one-to-one, which can position the plurality of magnetic cores 4 through the cooperation of the first positioning assemblies and the second positioning assemblies, to ensure accurate positioning and fixing of the plurality of magnetic cores 4, thereby ensuring the uniformity and stability of the relative position of the coil winding, improving the consistency of the coil electromagnetic and magneto-electric coupling time, and optimizing the corresponding functions.

[0040] In some embodiments, each first positioning assembly comprises a positioning hole and a positioning column 11, a plurality of positioning holes are arranged on the fixed shaft 1 in an axial direction, one end of a positioning column 11 is inserted into a positioning hole, and the other end extends outwardly between two adjacent magnetic cores 4. Each positioning hole is inserted with one positioning column 11, and when the plurality of magnetic cores 4 are fixed, the plurality of magnetic cores 4 are sleeved on the fixed shaft 1, then each positioning column 11 is arranged between two adjacent magnetic cores 4, i.e. each magnetic core 4 is clamped between two adjacent positioning columns 11, to position the plurality of magnetic cores 4. It can be understood that after the plurality of magnetic cores 4 are sleeved on the corresponding position of the fixed shaft 1, the end of the positioning column 11 can be directly inserted and fixed in the positioning hole, or the end of the positioning column 11 can be detachably inserted and fixed in the positioning hole.

[0041] It should be noted that the end of the positioning column 11 can also be fixed in the inner wall of the fixed shell 2, and when the fixed shell 2 is fixed on the outer wall of the magnetic core 4, the positioning column 11 passes between two adjacent magnetic cores 4, and the other end is inserted into the positioning hole formed on the fixed shaft 1. As an example, the positioning column 11 can be but not limited to a cylindrical structure or a cuboid structure, and the positioning hole is a circular hole or a square hole matched with the structure of the positioning column 11.

[0042] In some embodiments, the magnetic core 4 is a circular magnetic ring, and multiple circular magnetic rings are used to be sleeved on the outside of the fixed shaft 1 at intervals along the axial direction of the fixed shaft 1. A positioning post 11 is engaged between two adjacent circular magnetic rings. The positioning post 11 extends along the thickness direction of the circular magnetic ring in the radial direction of the fixed shaft 1, and the length of the positioning post 11 is not greater than the thickness of the circular magnetic ring. When fixing multiple magnetic cores 4, the multiple magnetic cores 4 are sleeved on the fixed shaft 1. By extending the length direction of the positioning post 11 along the thickness direction of the circular magnetic ring, the positioning post 11 is engaged between two adjacent magnetic cores 4 to position the magnetic cores 4. At the same time, the length of the positioning post 11 is set to be no greater than the thickness of the circular magnetic ring so that the fixed housing 2 can be fixed to the outside of the magnetic cores 4, so that the multiple magnetic cores 4 are fixed between the fixed shaft 1 and the fixed housing 2.

[0043] In some embodiments, each second positioning component includes adjacently arranged positioning grooves 23 and positioning ribs 24. The positioning grooves 23 are used to accommodate the outer wall of the circular magnetic ring, and the positioning ribs 24 are used to be disposed between two adjacent circular magnetic rings. When the fixed housing 2 is fixed to the outside of the circular magnetic ring, each positioning groove 23 corresponds to each circular magnetic ring, and the outer wall of one circular magnetic ring is accommodated in one positioning groove 23 to perform secondary positioning of multiple circular magnetic rings. At the same time, the positioning ribs 24 correspond to the gap between two adjacent circular magnetic rings, that is, to the positioning post 11, and one positioning rib 24 is again engaged in the gap between two adjacent circular magnetic rings, thereby performing tertiary positioning of multiple circular magnetic rings. It can be understood that the inner wall width of the positioning groove 23 is adapted to the outer wall thickness of the circular magnetic ring to facilitate the precise accommodation and engagement of the outer wall of the circular magnetic ring within the positioning groove 23 for secondary positioning of the circular magnetic ring. The outer wall width of the positioning rib 24 is adapted to the gap width between two adjacent circular magnetic rings, which is conducive to the positioning rib 24 being precisely positioned between the two adjacent circular magnetic rings, avoiding displacement of the circular magnetic rings, and providing three-level positioning of the circular magnetic rings.

[0044] In some embodiments, such as Figure 2 As shown, the outer wall of the fixed shaft 1 has multiple first grooves 12. The first grooves 12 extend along the axial direction of the fixed shaft 1 and communicate with the outside. The multiple first grooves 12 are spaced apart circumferentially along the outer wall of the fixed shaft 1. The first grooves 12 facilitate the threading and fixing of the electrode wires on the circular magnetic ring. The circular magnetic ring is sleeved on the fixed shaft 1, and the electrode wires are clamped in the first grooves 12 on the outer wall of the fixed shaft 1, so that the electrode wires can be closely attached to the circular magnetic ring, which helps to optimize its function.

[0045] In some embodiments, the inner wall of the fixed shell 2 is provided with a plurality of second wire grooves 25 in the axial direction, the second wire grooves 25 extend along the axial direction of the fixed shaft 1 and are in communication with the outside, and the plurality of second wire grooves 25 are circumferentially spaced apart along the inner wall of the fixed shell 2. The second wire grooves 25 are also conducive to the electrode wires on the circular magnetic ring being threaded and fixed, and the fixed shell 2 is fixed outside the circular magnetic ring, the electrode wires are clamped in the second wire grooves 25 on the inner wall of the fixed shell 2, and the electrode wires can also be tightly attached to the circular magnetic ring, which is conducive to optimizing its function.

[0046] In some embodiments, a plurality of wire holes 31 are formed in the fixed end cover 3, and a part of the plurality of wire holes 31 are in communication with the first wire groove 12 and the other part are in communication with the second wire groove 25. The wire holes 31 can make the electrode wires threaded and fixed in the first wire groove 12 and the second wire groove 25 pass through the corresponding wire holes 31 to be connected with the outside.

[0047] In some embodiments, the fixed shell 2 includes a first shell 21 and a second shell 22, and the cross sections of the first shell 21 and the second shell 22 are both semicircular arc structures, and the first shell 21 and the second shell 22 are adapted to form a cylindrical structure. The first shell 21 and the second shell 22 are assembled together to form a cylindrical structure of the fixed shell 2, so as to facilitate fixing and disassembling. As an example, the outer walls of the first shell 21 and the second shell 22 are provided with bolt hole structures in the radial direction, and the first shell 21 and the second shell 22 are connected and fixed together through the bolt hole structures to form a cylindrical structure of the fixed shell 2. Other structures (such as buckle structures) can also be provided to connect and fix the first shell 21 and the second shell 22 together.

[0048] In some embodiments, the first shell 21 and the second shell 22 are provided with foolproof structures in the radial direction. When installing and fixing the first shell 21 and the second shell 22, the foolproof structures can quickly match and fix the first shell 21 and the second shell 22, which is convenient for use and operation. As an example, the foolproof structure can include a first alignment member and a second alignment member, wherein the first alignment member includes a first alignment column and a first alignment hole, and the outer shapes of the first alignment column and the first alignment hole are adapted to each other; the second alignment member includes a second alignment column and a second alignment hole, and the outer shapes of the second alignment column and the second alignment hole are adapted to each other; and the outer shapes of the first alignment column and the second alignment hole are not adapted to each other, and the outer shapes of the second alignment column and the first alignment hole are not adapted to each other. When connecting the first shell 21 and the second shell 22, if the first alignment column and the second alignment hole are aligned, and the second alignment column and the first alignment hole are aligned, the first shell 21 and the second shell 22 cannot be connected and aligned. By changing the positions of the first shell 21 and the second shell 22, the first alignment column and the first alignment hole are aligned, and the second alignment column and the second alignment hole are aligned, so that the first shell 21 and the second shell 22 can be quickly aligned and fixed.

[0049] Example 2

[0050] This application provides a transformer, such as... Figure 3 As shown, the device includes multiple magnetic cores 4 and a fixing structure for the multiple magnetic cores 4 provided in Embodiment 1; multiple magnetic cores 4 are sleeved on a fixed shaft 1, a fixed housing 2 is fixed to the outer wall of the multiple magnetic cores 4, and a fixed end cap 3 is fixed to both ends of the fixed housing 2; one magnetic core 4 is engaged in the positioning groove 23 of a second positioning component, and the positioning post 11 of a first positioning component and the positioning rib 24 of a second positioning component are both engaged in the gap between two adjacent magnetic cores 4; the primary winding on the magnetic core 4 is engaged in the first wire groove 12 on the outer wall of the fixed shaft 1, and the secondary winding on the magnetic core 4 is engaged in the second wire groove 25 on the inner wall of the fixed housing 2, and the primary winding and the secondary winding pass through the wire hole 31 on the fixed end cap 3.

[0051] Multiple magnetic cores 4 are mounted on a fixed shaft 1. A fixed post is placed between two adjacent magnetic cores 4 for primary positioning. A fixed outer shell 2 is fixed to the outer wall of the multiple magnetic cores 4. A positioning groove 23 on the inner wall of the fixed outer shell 2 accommodates one magnetic core 4 for secondary positioning. Positioning ribs 24 adjacent to the positioning groove 23 are engaged between two adjacent magnetic cores 4 for tertiary positioning. Through tertiary positioning, the multiple magnetic cores 4 are precisely positioned and fixed to form a transformer. The relative positions of the coil windings of this transformer are uniform and stable, and the electromagnetic and magnetoelectric coupling time of the coils is consistent. At the same time, the primary winding on the magnetic core 4 is engaged in the first groove 12 on the outer wall of the fixed shaft 1, and the secondary winding on the magnetic core 4 is engaged in the second groove 25 on the inner wall of the fixed outer shell 2, so that both the primary and secondary windings can be tightly attached to the magnetic core 4. With the above-mentioned multiple positioning of the magnetic cores 4, the transformer has superior performance.

[0052] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A multi-core fixing structure, characterized in that, include: A fixed shaft, on which a plurality of first positioning components are spaced apart along the axial direction, for isolating and positioning the plurality of magnetic cores; A fixed housing is provided, which cooperates with the fixed shaft to fix the plurality of magnetic cores between the fixed shaft and the fixed housing; a plurality of second positioning components are provided axially on the inner wall of the fixed housing for isolating and positioning the plurality of magnetic cores, and the plurality of first positioning components and the plurality of second positioning components are provided in a one-to-one correspondence. A fixed end cap is fixed to both ends of the fixed housing and encloses the fixed shaft inside the fixed housing.

2. The multi-core fixing structure according to claim 1, characterized in that, Each of the first positioning components includes a positioning hole and a positioning post. The plurality of positioning holes are spaced apart along the axial direction on the fixed shaft. One end of the positioning post is inserted into one of the positioning holes, and the other end extends outward to the space between two adjacent magnetic cores.

3. The multi-core fixing structure according to claim 2, characterized in that, The magnetic core is a circular magnetic ring, and multiple circular magnetic rings are used to be sleeved on the outside of the fixed shaft at intervals along the axial direction of the fixed shaft; a positioning post is engaged between two adjacent circular magnetic rings, and the positioning post extends along the radial direction of the fixed shaft and the length direction of the positioning post extends along the thickness direction of the circular magnetic ring, and the length of the positioning post is not greater than the thickness of the circular magnetic ring.

4. The multi-core fixing structure according to claim 3, characterized in that, Each of the second positioning components includes an adjacent positioning groove and a positioning rib, the positioning groove being used to accommodate the outer wall of the circular magnetic ring, and the positioning rib being used to be positioned between two adjacent circular magnetic rings.

5. The multi-core fixing structure according to any one of claims 1-4, characterized in that, The outer wall of the fixed shaft is provided with a plurality of first grooves, which extend along the axial direction of the fixed shaft and communicate with the outside. The plurality of first grooves are arranged circumferentially along the outer wall of the fixed shaft.

6. The multi-core fixing structure according to claim 5, characterized in that, The inner wall of the fixed housing is provided with a plurality of second grooves along the axial direction. The second grooves extend along the axial direction of the fixed shaft and communicate with the outside. The plurality of second grooves are spaced apart circumferentially along the inner wall of the fixed housing.

7. The multi-core fixing structure according to claim 6, characterized in that, The fixed end cap has multiple wire passage holes, a portion of which communicates with the first wire groove and another portion of which communicates with the second wire groove.

8. The multi-core fixing structure according to any one of claims 1-4, characterized in that, The fixed housing includes a first housing and a second housing. The cross-sections of the first housing and the second housing are both semi-circular arc structures, and the first housing and the second housing are adapted to form a cylindrical structure.

9. The multi-core fixing structure according to claim 8, characterized in that, The first housing and the second housing are provided with a foolproof structure in the radial direction.

10. A transformer, characterized in that, The device includes multiple magnetic cores and a fixing structure for the multiple magnetic cores as described in any one of claims 1-9; the multiple magnetic cores are sleeved on a fixed shaft, the fixed housing is fixed to the outer wall of the multiple magnetic cores, and the fixed end cap is fixed to both ends of the fixed housing; one magnetic core is engaged in a positioning groove of a second positioning component, and a positioning post of the first positioning component and a positioning rib of the second positioning component are both engaged in the gap between two adjacent magnetic cores; the primary winding on the magnetic core is engaged in a first wire groove on the outer wall of the fixed shaft, and the secondary winding on the magnetic core is engaged in a second wire groove on the inner wall of the fixed housing, and the primary winding and the secondary winding pass through the wire hole on the fixed end cap.

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