Device for adjusting inductance of transformer and transformer

Abstract

The invention belongs to the field of transformer inductance adjustment, and particularly relates to a device for adjusting the inductance of a transformer and the transformer. In order to solve the technical problem that in the prior art, a pressing plate cannot adjust the inductance of a transformer, the device for adjusting the inductance of the transformer comprises an upper clamping piece and a lower clamping piece which are used for clamping an upper magnetic core and a lower magnetic core of the transformer respectively, and the upper clamping piece and the lower clamping piece comprise fastening structures enabling the clamping pieces to clamp the magnetic cores. A position adjusting structure used for adjusting the relative position of the upper clamping piece and the lower clamping piece is arranged between the upper clamping piece and the lower clamping piece. The invention further discloses a transformer using the device. The clamping pieces are adopted to clamp the upper magnetic core and the lower magnetic core, and the relative positions of the clamping pieces for clamping different magnetic cores are adjusted through the position adjusting structure, so that the relative positions of the upper magnetic core and the lower magnetic core are changed, the thickness of an air gap between the upper magnetic core and the lower magnetic core is changed, and finally the technical effect that the inductance of the transformer can be adjusted is achieved.

Description

Technical Field

[0001] The invention belongs to the field of transformer inductance regulation, and in particular relates to a device for regulating transformer inductance and a transformer. Background Art

[0002] High-frequency transformers have high requirements on parameters such as inductance and leakage inductance. The inductance of the transformer is related to the air gap thickness of the magnetic core and the number of coil turns. In the same transformer, the number of coil turns is often certain. Therefore, the inductance of the transformer is closely related to the air gap thickness of the magnetic core.

[0003] The Chinese invention patent application with application publication number CN 111670481 A and application publication date 2020.09.15 discloses an electrical device, such as a train transformer, having a clamping plate for clamping a magnetizable magnetic core. The electrical device has a magnetizable magnetic core, which is composed of two halves. The magnetic core is completely arranged between two clamping plates arranged opposite to each other. A tension element (threaded rod) for clamping the magnetic core extends between the two clamping plates. One end of each half of the magnetic core contacts the clamping plate, and the other end contacts a shell filled with an insulating fluid, and a high-voltage winding is arranged in the shell.

[0004] Although the electrical device disclosed in the above patent application can fix the two magnetic cores between the clamping plates by tightening the clamping nut of the threaded rod (tension element), thereby controlling the air gap of the magnetic core to remain unchanged, it is impossible to adjust the distance between the two magnetic cores, and thus the air gap of the magnetic core, and thus the inductance of the transformer. Summary of the invention

[0005] The object of the present invention is to provide a device for adjusting the inductance of a transformer and a transformer, so as to solve the technical problem in the prior art that the pressing plate cannot adjust the inductance of the transformer.

[0006] To achieve the above object, the technical solution of the device for adjusting the inductance of a transformer provided by the present invention is:

[0007] A device for adjusting the inductance of a transformer comprises an upper clamping member and a lower clamping member respectively used for clamping an upper magnetic core and a lower magnetic core of the transformer, wherein the upper and lower clamping members comprise a fastening structure for clamping the magnetic cores, and a position adjustment structure for adjusting the relative position of the upper clamping member and the lower clamping member is provided between the upper clamping member and the lower clamping member.

[0008] The beneficial effects are as follows: the present invention is an improved invention. The clamping parts are used to clamp the upper magnetic core and the lower magnetic core, and the relative positions of the clamping parts clamping different magnetic cores are adjusted through the position adjustment structure, thereby changing the relative positions of the upper magnetic core and the lower magnetic core, and then changing the thickness of the air gap between the upper magnetic core and the lower magnetic core, and finally achieving the technical effect of being able to adjust the inductance of the transformer.

[0009] Furthermore, the clamping member includes a clamping plate for clamping the upper and lower magnetic cores and a connecting ear connected to the clamping plate, and the position adjustment structure is arranged through the connecting ear.

[0010] The beneficial effect is that by providing the connecting ears, the specification and shape of the clamping plate can be free from the restriction of the position adjustment structure.

[0011] Furthermore, the position adjustment structure includes a support structure that passes through at least two connecting ears, and a first nut and a second nut that are screwed to the support structure, and the first nut and the second nut are screwed to two sides of the same connecting ear respectively.

[0012] The beneficial effect is that the support structure, the first nut and the second nut can not only play the role of fixing the position of the clamping member, but also can continuously adjust the relative position between the clamping members by rotating the nut, thereby continuously adjusting the thickness of the air gap. At the same time, the change in the thickness of the air gap is determined by the number of turns of the nut rotation. By amplifying the small change to the number of turns of the nut rotation, the thickness of the air gap can be adjusted with very high precision and extremely high stability.

[0013] Furthermore, the supporting structure is a screw rod.

[0014] The beneficial effect is that by setting the supporting structure as a screw rod, the first nut and the second nut can be located at any position, which is convenient for installation.

[0015] Furthermore, the supporting structure includes at least two screw rods and nuts used to connect different screw rods and arranged between the screw rods.

[0016] The beneficial effects are as follows: by setting a nut between the screw rods and connecting different screw rods with the nut, on the one hand, the screw rod can be screwed into the nut when the device is not in use, thereby reducing the volume of the device and facilitating transportation; on the other hand, when the device is used, not only can the relative position of the upper magnetic core and the lower magnetic core be adjusted by rotating the first nut and the second nut, thereby adjusting the thickness of the air gap between the upper magnetic core and the lower magnetic core, but the relative position of the upper magnetic core and the lower magnetic core can also be adjusted by rotating the nut set between the screw rods, thereby adjusting the thickness of the air gap between the upper magnetic core and the lower magnetic core.

[0017] Furthermore, the fastening structure includes a screw rod penetrating the clamping plate, a first nut and a second nut threadedly connected to the screw rod, and the first nut and the second nut are respectively threadedly connected to two sides of the same clamping plate.

[0018] The beneficial effect is that the screw rod, the first nut and the second nut can not only fix the position of the clamping plate, but also continuously adjust the relative position between the clamping plates by rotating the nut, thereby clamping or loosening the magnetic core.

[0019] Furthermore, the clamping plate is a "U"-shaped structure, and connecting plates are respectively provided at both ends of the clamping plate, and fastening structures are provided on the connecting plates.

[0020] The beneficial effect is that by setting the clamping plate to be in a "U" shape, the magnetic core can be better clamped.

[0021] Furthermore, the fastening structure includes a card slot arranged on different connecting plates located on the same clamping plate and a buckle engaged with the card slot.

[0022] The beneficial effect is that by providing the card slot and the card buckle, the card slot and the card buckle can be engaged and matched without the aid of tools, thereby clamping the magnetic core more conveniently.

[0023] Furthermore, the card slot and the card buckle are both located at the center of the connecting plate.

[0024] The beneficial effect is: by setting the slot and the buckle at the center of the connecting structure, only one type of clamping plate and connecting plate needs to be manufactured when manufacturing the clamping piece, which facilitates the production and manufacturing of the clamping piece. At the same time, there is no need to pair the clamping plates when in use, and any two clamping plates can be snapped together through the slots and buckles on the connecting plate.

[0025] To achieve the above purpose, the technical solution of the transformer provided by the present invention is:

[0026] A transformer comprises an upper clamping member and a lower clamping member respectively used for clamping an upper magnetic core and a lower magnetic core of the transformer, wherein the upper and lower clamping members comprise a fastening structure for clamping the magnetic cores, and a position adjustment structure for adjusting the relative position of the upper clamping member and the lower clamping member is provided between the upper clamping member and the lower clamping member.

[0027] The beneficial effects are as follows: the present invention is an improved invention. The clamping parts are used to clamp the upper magnetic core and the lower magnetic core, and the relative positions of the clamping parts clamping different magnetic cores are adjusted through the position adjustment structure, thereby changing the relative positions of the upper magnetic core and the lower magnetic core, and then changing the thickness of the air gap between the upper magnetic core and the lower magnetic core, and finally achieving the technical effect of being able to adjust the inductance of the transformer.

[0028] Furthermore, the clamping member includes a clamping plate for clamping the upper and lower magnetic cores and a connecting ear connected to the clamping plate, and the position adjustment structure is arranged through the connecting ear.

[0029] The beneficial effect is that by providing the connecting ears, the specification and shape of the clamping plate can be free from the restriction of the position adjustment structure.

[0030] Furthermore, the position adjustment structure includes a support structure that passes through at least two connecting ears, and a first nut and a second nut that are screwed to the support structure, and the first nut and the second nut are screwed to two sides of the same connecting ear respectively.

[0031] The beneficial effect is that the support structure, the first nut and the second nut can not only play the role of fixing the position of the clamping member, but also can continuously adjust the relative position between the clamping members by rotating the nut, thereby continuously adjusting the thickness of the air gap. At the same time, the change in the thickness of the air gap is determined by the number of turns of the nut rotation. By amplifying the small change to the number of turns of the nut rotation, the thickness of the air gap can be adjusted with very high precision and extremely high stability.

[0032] Furthermore, the supporting structure is a screw rod.

[0033] The beneficial effect is that by setting the supporting structure as a screw rod, the first nut and the second nut can be located at any position, which is convenient for installation.

[0034] Furthermore, the supporting structure includes at least two screw rods and nuts used to connect different screw rods and arranged between the screw rods.

[0035] The beneficial effects are as follows: by setting a nut between the screw rods and connecting different screw rods with the nut, on the one hand, the screw rod can be screwed into the nut when the device is not in use, thereby reducing the volume of the device and facilitating transportation; on the other hand, when the device is used, not only can the relative position of the upper magnetic core and the lower magnetic core be adjusted by rotating the first nut and the second nut, thereby adjusting the thickness of the air gap between the upper magnetic core and the lower magnetic core, but the relative position of the upper magnetic core and the lower magnetic core can also be adjusted by rotating the nut set between the screw rods, thereby adjusting the thickness of the air gap between the upper magnetic core and the lower magnetic core.

[0036] Furthermore, the fastening structure includes a screw rod penetrating the clamping plate, a first nut and a second nut threadedly connected to the screw rod, and the first nut and the second nut are respectively threadedly connected to two sides of the same clamping plate.

[0037] The beneficial effect is that the screw rod, the first nut and the second nut can not only fix the position of the clamping plate, but also continuously adjust the relative position between the clamping plates by rotating the nut, thereby clamping or loosening the magnetic core.

[0038] Furthermore, the clamping plate is a "U"-shaped structure, and connecting plates are respectively provided at both ends of the clamping plate, and fastening structures are provided on the connecting plates.

[0039] The beneficial effect is that by setting the clamping plate to be in a "U" shape, the magnetic core can be better clamped.

[0040] Furthermore, the fastening structure includes a card slot arranged on different connecting plates located on the same clamping plate and a buckle engaged with the card slot.

[0041] The beneficial effect is that by providing the card slot and the card buckle, the card slot and the card buckle can be engaged and matched without the aid of tools, thereby clamping the magnetic core more conveniently.

[0042] Furthermore, the card slot and the card buckle are both located at the center of the connecting plate.

[0043] The beneficial effect is: by setting the slot and the buckle at the center of the connecting structure, only one type of clamping plate and connecting plate needs to be manufactured when manufacturing the clamping piece, which facilitates the production and manufacturing of the clamping piece. At the same time, there is no need to pair the clamping plates when in use, and any two clamping plates can be snapped together through the slots and buckles on the connecting plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of the finite element simulation model of the high-frequency transformer;

[0045] Figure 2 for Figure 1 A graph showing the relationship between the inductance and the core air gap of the finite element simulation model;

[0046] Figure 3 It is a structural schematic diagram of a device for adjusting transformer inductance according to the present invention;

[0047] Figure 4 It is a structural schematic diagram of the device for adjusting the inductance of a transformer of the present invention when adjusting the inductance of a transformer;

[0048] Figure 5 It is a front view of the device for adjusting the inductance of a transformer of the present invention when adjusting the inductance of the transformer.

[0049] Description of reference numerals:

[0050] 1. Transformer; 11. Upper magnetic core; 12. Lower magnetic core; 13. Air gap; 2. Clamping piece; 21. Clamping plate; 22. Connecting ear; 3. Screw rod; 4. First nut; 5. Second nut. DETAILED DESCRIPTION

[0051] The present invention is further described in detail below in conjunction with embodiments.

[0052] High-frequency transformers have high requirements for parameters such as inductance and leakage inductance, and the inductance of transformer 1 and the thickness of the air gap 13 of the magnetic core are related to the number of coil turns. In the same transformer, the number of coil turns is often constant. Therefore, the inductance of transformer 1 and the thickness of the air gap 13 of the magnetic core are closely related.

[0053] The inductance of the transformer is closely related to the air gap between the upper and lower magnetic cores of the transformer. The inductance of the coil with an air gap is:

[0054]

[0055] In the formula, L: coil inductance; N: transformer turns; Rc : core and armature reluctance; R δ : air gap reluctance; l c : Magnetic core magnetic path length; δ: Air gap thickness; μ: Absolute magnetic permeability; A c : air gap area; μ0: air magnetic permeability; μ r : Relative magnetic permeability. In high permeability core materials, it can be approximately considered that R c <<R δ , so the above formula can be approximately written as

[0056]

[0057] It can be seen from the formula that the inductance of the transformer is inversely proportional to the air gap of the magnetic core.

[0058] like Figure 1-2 As shown, by simulating the high-frequency transformer prototype with finite element simulation software, within a certain range, it can also be concluded that the transformer core air gap is inversely proportional to the inductance. In a straight line section of the curve where the air gap distance is less than 0.2mm, the inductance decreases faster; in a straight line section of the curve where the air gap distance is greater than 0.2mm, the inductance decreases slower. Therefore, there are two straight lines, that is, there are two ranges where the transformer core air gap is inversely proportional to the inductance. Generally, in actual production and transportation, the air gap distance of the high-frequency transformer is about 0.05mm, so when the air gap distance changes slightly, the inductance changes greatly, so it is necessary to control and adjust the air gap distance during production and transportation.

[0059] Specific embodiment 1 of the device for adjusting transformer inductance provided by the present invention:

[0060] like Figure 3-5 As shown, the present invention discloses a device for adjusting the inductance of a transformer, comprising an upper clamping member and a lower clamping member respectively used for clamping the upper magnetic core 11 and the lower magnetic core 12 of the transformer 1, and a fastening structure for clamping the clamping member 2 to clamp the magnetic core and a position adjustment structure for adjusting the relative position between the upper and lower clamping members. In this embodiment, the clamping member 2 comprises a clamping plate 21 for clamping the upper and lower magnetic cores and a connecting ear 22 arranged on the clamping plate 21, and the position adjustment structure is arranged on the connecting ear 22. The position adjustment structure comprises a screw rod 3 (i.e., a supporting structure) passing through at least two connecting ears 22, a first nut 4 and a second nut 5 screwed to the screw rod 3, and the first nut 4 and the second nut 5 are screwed to the two sides of the same connecting ear 22 respectively. The fastening structure comprises a screw rod 3 passing through the clamping plate 21, a first nut 4 and a second nut 5 screwed to the screw rod 3, and the first nut 4 and the second nut 5 are screwed to the two sides of the same clamping plate 21 respectively. Through holes are provided on the clamping plate 21 and the connecting ear 22, and the fastening structure and the position adjustment structure are arranged through the through holes.

[0061] In this embodiment, the number of the clamping plates 21 is four, the fastening device includes four screw rods 3, eight first nuts 4 and eight second nuts 5, and the position adjustment structure includes four screw rods 3, eight first nuts 4 and eight second nuts 5. However, in other embodiments, the number of the clamping plates 21 may be six or more; in the case where there are four clamping plates 21, the fastening device may also include only two screw rods 3 and four first nuts 4. In this case, in order to achieve a better fixing effect, the fastening device can be set in the middle position of the clamping member 2; similarly, in the case where there are four clamping plates 21, the position adjustment structure may also include only two screw rods 3, four first nuts 4 and four second nuts 5. In this case, in order to achieve a better fixing and adjustment effect, the position adjustment structure can be set in the middle position of the clamping member 2.

[0062] When using the device in this specific embodiment 1 to adjust the inductance of the transformer 1, the following steps can be followed:

[0063] S1. Prepare the coil, upper magnetic core 11, lower magnetic core 12, clamping member 2 and other components to be used. At the same time, clean the components and ensure that the end surface of the magnetic core is clean and free of impurities.

[0064] S2. Use the clamping member 2 and the fastening structure to fix the upper and lower magnetic cores respectively. Specifically, in this embodiment, the clamping plate 21 is first clamped on both sides of the magnetic core, and then the screw rod 3 passes through the through hole on the clamping plate 21, and the first nut 4 and the second nut 5 are screwed on both sides of the same clamping plate 21 respectively, and finally the first nut 4 and the second nut 5 are adjusted to make the clamping plate 21 clamp the magnetic core.

[0065] S3. Insert the coil between the upper and lower magnetic cores.

[0066] S4. Connect the clamping members 2 for clamping the upper and lower magnetic cores together using the clamping members 2 and the position adjustment structure. Specifically, in this embodiment, the screw rod 3 passes through the through hole on the connecting ear 22, and the first nut 4 and the second nut 5 are respectively screwed on both sides of the same connecting ear 22, so as to fix the position of the clamping member 2.

[0067] S5. Connect the LCR meter to the high voltage and low voltage terminals respectively to measure the inductance of transformer 1.

[0068] S6. Determine whether the inductance of the transformer 1 needs to be adjusted according to the inductance measured in step S5 and the inductance design requirements of the transformer 1. If necessary, adjust the relative position of the clamping members 2 clamping different magnetic cores through the position adjustment structure, thereby changing the relative position of the upper magnetic core 11 and the lower magnetic core 12, and then changing the thickness of the air gap 13 between the upper magnetic core 11 and the lower magnetic core 12, and finally making the inductance of the transformer 1 meet the design requirements. Specifically, in this embodiment, the first nut 4 and the second nut 5 in the position adjustment structure are adjusted to change the thickness of the air gap 13, and finally making the inductance of the transformer 1 meet the design requirements.

[0069] In the actual production process, the inductance of the transformer 1 can be adjusted directly by using the device in this specific embodiment when the transformer 1 leaves the factory. In the subsequent production and transportation process, the first nut 4 and the second nut 5 ensure that the inductance does not change. By setting the position adjustment structure on the connecting ear 22, the specifications of the clamping plate 21 are not limited by the position adjustment structure, that is, the clamping plate 21 can be made thinner. By setting through holes on the clamping plate 21 and the connecting ear 22, and setting the fastening structure and the position adjustment structure through the through holes, only one specification of the clamping plate 21 can be manufactured when manufacturing the clamping member 2, which is convenient for the production and manufacturing of the clamping member 2.

[0070] In the process of using the device in this specific embodiment 1, the screw rod 3, the first nut 4 and the second nut 5 can not only fix the position of the clamping member 2, but also continuously adjust the relative position between the clamping members 2 by rotating the nut, thereby continuously adjusting the thickness of the air gap 13. At the same time, the change in the thickness of the air gap 13 is determined by the number of turns of the nut rotation. By amplifying the tiny change to the number of turns of the nut rotation, the thickness of the air gap 13 can be adjusted with very high precision and extremely high stability.

[0071] Specific embodiment 2 of the device for adjusting transformer inductance provided by the present invention:

[0072] The main difference between this specific embodiment and specific embodiment 1 is that: in this embodiment, the connecting ear 22 is not included, the thickness of the clamping plate 21 is relatively thick, and a transverse through hole and a longitudinal through hole are provided on the clamping plate 21. The transverse through hole is used to connect the clamping plates 21 clamping the same magnetic core, and the clamping plates 21 are clamped to the magnetic core through the fastening structure; the longitudinal through hole is used to connect the clamping plates 21 clamping different magnetic cores, and the relative position between the clamping plates 21 is adjusted through the position adjustment structure, wherein the first nut 4 and the second nut 5 are respectively arranged on both sides of the through hole, so as to fix the clamping plate 21. Compared with specific embodiment 1, by directly setting the clamping plate 21 as a clamping plate 21 with transverse and longitudinal through holes, the technical effect of only making a clamping plate 21 of one specification when making the clamping member 2 can also be achieved.

[0073] Specific embodiment 3 of the device for adjusting transformer inductance provided by the present invention:

[0074] The main difference between this specific embodiment and specific embodiment 1 is that in this embodiment, the clamping plate 21 is a "U"-shaped structure, and connecting plates are provided at both ends of the clamping plate 21. The connecting plates of the clamping member 2 for clamping the same magnetic core are connected by a fastening structure, and the fastening structure includes a slot provided on the connecting plate at one end of the clamping plate 21 and a buckle provided on the connecting plate at the other end. In order to facilitate the manufacture of the clamping member 2, the slot and the buckle can be located at the center of the connecting plate. Compared with specific embodiment 1, the clamping member 2 can be conveniently and quickly fixed to the upper and lower magnetic cores by the clamping plate 21, the slot and the buckle of the "U"-shaped structure. At the same time, by locating the slot and the buckle at the center of the connecting structure, only one specification of clamping plate 21 and connecting plate can be manufactured when manufacturing the clamping member 2. At the same time, there is no need to pair the clamping plates 21 when using them, and any two clamping plates 21 can be snap-fitted through the slots and buckles on the connecting plates.

[0075] Specific embodiment 4 of the device for adjusting transformer inductance provided by the present invention:

[0076] The main difference between this specific embodiment and specific embodiment 3 is that in this embodiment, the connection ear 22 is not included, and the position adjustment structure is arranged on the connection structure. Compared with specific embodiment 3, the position adjustment structure is arranged on the connection structure, so that the inductance of the transformer 1 can be adjusted without the connection ear 22, making the structure more compact.

[0077] Specific embodiment 5 of the device for adjusting transformer inductance provided by the present invention:

[0078] The main difference between this specific embodiment and specific embodiment 1 is that: in this embodiment, the position adjustment structure includes a support structure that passes through at least two connecting ears 22, a first nut 4 and a second nut 5 that are screwed to the support structure, and the first nut 4 and the second nut 5 are screwed to the two sides of the same connecting ear 22, respectively, and the support structure includes at least two screw rods and nuts that are used to connect different screw rods and are arranged between the screw rods. Compared with specific embodiment 1, by arranging a nut between the screw rods and connecting different screw rods with the nut, on the one hand, the screw rod can be screwed into the nut when the device is not in use, thereby reducing the volume of the device and facilitating transportation; on the other hand, when the device is used, not only can the relative position of the upper magnetic core 11 and the lower magnetic core 12 be adjusted by rotating the first nut and the second nut, thereby adjusting the thickness of the air gap between the upper magnetic core 11 and the lower magnetic core 12, but also the relative position of the upper magnetic core 11 and the lower magnetic core 12 can be adjusted by rotating the nut arranged between the screw rods, thereby adjusting the thickness of the air gap between the upper magnetic core 11 and the lower magnetic core 12.

[0079] Specific embodiment 6 of the device for adjusting transformer inductance provided by the present invention:

[0080] The main difference between this specific embodiment and specific embodiment 5 is that in this embodiment, the nut disposed between the screw rods is provided with upper and lower threads, and the upper and lower threads are respectively matched with the screw rod connected above the nut and the screw rod connected below the nut, so that when the nut is rotated in one direction, the screw rods connected above and below the nut are both extended out of the nut. Compared with specific embodiment 5, there is no need to fix the screw rod, and the nut can be directly rotated, thereby conveniently adjusting the thickness of the air gap.

[0081] Specific embodiment 1 of the transformer provided by the present invention:

[0082] The present invention also discloses a transformer, including a device for adjusting the inductance of the transformer, and the device for adjusting the inductance of the transformer is any one of the specific embodiments 1-6 of the device for adjusting the inductance of the transformer provided by the present invention. For example, the rated frequency of the transformer 1 is 10kHz, the high voltage is 1500V, and the low voltage is 1200V. Both the high and low voltages are wound with copper foil. The thickness of the copper foil winding is relatively thin, which can effectively reduce the skin effect and proximity effect caused by high frequency. The magnetic core is made of amorphous alloy of high magnetic permeability material. Afterwards, the device for adjusting the inductance of the transformer is set on the above-mentioned transformer 1, so as to obtain a transformer capable of adjusting the inductance of the transformer 1. In summary, the transformer provided by the present invention can adjust the inductance of the transformer by adjusting the thickness of the air gap 13.

[0083] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for adjusting the inductance of a transformer, characterized in that: It comprises an upper clamping member and a lower clamping member respectively used for clamping the upper magnetic core and the lower magnetic core of the transformer, the upper and lower clamping members comprise a fastening structure for clamping the magnetic core, and a position adjustment structure for adjusting the relative position of the upper clamping member and the lower clamping member is arranged between the upper clamping member and the lower clamping member.

2. The device for adjusting the inductance of a transformer according to claim 1, characterized in that: The clamping member comprises a clamping plate for clamping the upper and lower magnetic cores and a connecting ear connected to the clamping plate, and the position adjustment structure is arranged through the connecting ear.

3. The device for adjusting the inductance of a transformer as claimed in claim 2, characterized in that: The position adjustment structure comprises a support structure penetrating at least two connection ears, and a first nut and a second nut threadedly connected to the support structure. The first nut and the second nut are threadedly connected to two sides of the same connection ear, respectively.

4. The device for adjusting the inductance of a transformer as claimed in claim 3, characterized in that: The supporting structure is a screw rod.

5. The device for adjusting the inductance of a transformer as claimed in claim 4, characterized in that: The supporting structure comprises at least two screw rods and nuts used for connecting different screw rods and arranged between the screw rods.

6. The device for adjusting transformer inductance according to claim 2, characterized in that: The fastening structure comprises a screw rod at least penetrating a clamping plate, and a first nut and a second nut screwed to the screw rod, wherein the first nut and the second nut are screwed to two sides of the same clamping plate respectively.

7. The device for adjusting transformer inductance according to claim 2, characterized in that: The clamping plate is a "U"-shaped structure, and connecting plates are respectively provided at both ends of the clamping plate, and fastening structures are provided on the connecting plates.

8. The device for adjusting the inductance of a transformer as claimed in claim 7, characterized in that: The fastening structure comprises a clamping slot arranged on different connecting plates located on the same clamping plate and a buckle engaged with the clamping slot.

9. The device for adjusting transformer inductance according to claim 8, characterized in that: The clamping slot and the clamping buckle are both located at the center of the connecting plate.

10. A transformer, characterized in that: The invention comprises a device for adjusting the inductance of a transformer as claimed in any one of claims 1 to 9.

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