Flexible iron core
The flexible iron core design simplifies the assembly process, improves production efficiency, reduces magnetic leakage, and enhances magnetic conductivity.
Patent Information
- Application Number
- CN202520064778.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-01-13
AI Technical Summary
The existing iron core production process is complicated, resulting in low production efficiency and high costs.
The design employs a flexible iron core, including an iron core body fitted with heat shrink tubing. The assembly process is simplified through the lamination and through-hole structure, and the combination of adhesive bonding or welding avoids winding operations.
It improved production efficiency, reduced magnetic leakage, and enhanced magnetic conductivity.
Smart Images
Figure CN223770900U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of current transformer technology, and more specifically, to a flexible iron core. Background Technology
[0002] Current transformers typically consist of an iron core. Because the iron core has a much higher permeability than air, it can effectively concentrate and guide the magnetic field, thereby improving the induction capability of the current transformer.
[0003] Existing iron cores are generally open-type, requiring a series of processes such as impregnation, winding, and cutting to ensure the magnetic properties of the iron core. These processes are quite complicated, resulting in low production efficiency and high cost for the iron core. Utility Model Content
[0004] This invention provides a flexible iron core that can overcome some or all of the defects of the prior art.
[0005] The flexible iron core according to this utility model includes an iron core body, and a heat shrink tubing is provided on the outer sleeve of the iron core body. The iron core body includes a first stacked plate, a second stacked plate, and a third stacked plate with sequentially increasing lengths. The first stacked plate, the second stacked plate, and the third stacked plate are sequentially attached. One end of the first stacked plate is provided with a through hole, the end of the second stacked plate away from the first through hole is provided with a through hole, and the end of the third stacked plate near the first through hole is provided with a third through hole.
[0006] Preferably, the shortest distance between the first through hole and the end face of the first stacked piece along its length is 5 mm, and the radius of the first through hole is 2.5 mm.
[0007] Preferably, the shortest distance between the second through hole and the end face of the second lamination along its length is 5 mm, and the radius of the second through hole is 2.5 mm.
[0008] Preferably, the shortest distance between the third through hole and the end face of the third lamination along the length direction is 5 mm, and the radius of the third through hole is 2.5 mm.
[0009] Preferably, there are two first stacks, two second stacks, and two third stacks.
[0010] Preferably, the thickness of the first, second, and third stacks is 0.35 mm.
[0011] Preferably, the first stack of sheets forms a first groove through both ends in the width direction, the second stack of sheets forms a second groove through both ends in the width direction, and the third stack of sheets forms a third groove through both ends in the width direction. The first groove, the second groove, and the third groove are matched to form a positioning groove when the first stack of sheets, the second stack of sheets, and the third stack of sheets are attached in sequence.
[0012] Preferably, the first, second, and third slots are all square slots with a side length of 1 mm.
[0013] Preferably, the shortest distance between both ends of the heat shrink tubing and both ends of the iron core body along the length direction is 50mm.
[0014] Beneficial effects:
[0015] The flexible iron core provided by this invention can be assembled more easily without the need for winding or other operations, thus improving production efficiency.
[0016] Furthermore, the flexible iron core of this invention has only one opening, which results in less magnetic leakage compared to an open-type iron core with two openings, thus exhibiting better magnetic conductivity. Attached Figure Description
[0017] Figure 1 A schematic diagram of the isometric projection of a flexible iron core;
[0018] Figure 2 This is an isometric schematic diagram of the iron core body;
[0019] Figure 3 This is a schematic diagram of the iron core body exploding;
[0020] Figure 4 This is a schematic diagram of the unfolded iron core body;
[0021] Figure 5 This is a schematic diagram of the iron core body being wound in a loop. Detailed Implementation
[0022] To further understand the content of this utility model, a detailed description of the utility model is provided in conjunction with the embodiments. It should be understood that the embodiments are merely illustrative and not limiting of the utility model.
[0023] Seen in Figure 1-4 This embodiment provides a flexible iron core, which includes an iron core body 100. The iron core body 100 is covered with a heat shrink tubing 200. The iron core body 100 includes two first laminations 110, two second laminations 120 and three third laminations 130 with increasing lengths. The first laminations 110, the second laminations 120 and the third laminations 130 are attached to each other in sequence. One end of the first lamination 110 is provided with a through hole 111. The end of the second lamination 120 away from the first through hole 111 is provided with a through hole 121. The end of the third lamination 130 near the first through hole 111 is provided with a third through hole 131.
[0024] The lengths of the two first laminations 110 are 285mm and 287mm, the lengths of the two second laminations 120 are 289mm and 291mm, and the lengths of the two third laminations 130 are 293mm and 295mm. The first laminations 110, the second laminations 120, and the third laminations 130 are all made of annealed silicon steel sheets. Annealing the silicon steel sheets can significantly reduce hysteresis loss and eddy current loss, thereby improving the overall energy efficiency of the material. In addition, the annealed silicon steel sheets have high saturation magnetic induction intensity and good permeability, which can conduct magnetism more effectively. Furthermore, after appropriate treatment, the silicon steel sheets have good flexibility, which is convenient for winding.
[0025] It is understandable that the adjacent first stack 110, second stack 120 and third stack 130 are joined by adhesive or welding.
[0026] The thickness of the first stack 110, the second stack 120, and the third stack 130 is 0.35 mm.
[0027] Furthermore, the shortest distance between the first through hole 111 and the end face of the first stacked plate 110 in the longitudinal direction is 5mm, and the radius of the first through hole 111 is 2.5mm; the shortest distance between the second through hole 121 and the end face of the second stacked plate 120 in the longitudinal direction is 5mm, and the radius of the second through hole 121 is 2.5mm; the shortest distance between the third through hole 131 and the end face of the third stacked plate 130 in the longitudinal direction is 5mm, and the radius of the third through hole 131 is 2.5mm.
[0028] In this embodiment, the first stacked piece 110 forms a first slot 112 through both ends in the width direction, the second stacked piece 120 forms a second slot 122 through both ends in the width direction, and the third stacked piece 130 forms a third slot 132 through both ends in the width direction. When the first stacked piece 110, the second stacked piece 120, and the third stacked piece 130 are sequentially attached, they cooperate to form a positioning groove 140.
[0029] Among them, the first slot 112, the second slot 122 and the third slot 132 are all square slots with a side length of 1mm.
[0030] By setting the first slot 112, the second slot 122 and the third slot 132, it is convenient for assembly personnel to align and fit the first stack 110, the second stack 120 and the third stack 130, and prevent their positions from being confused.
[0031] In this embodiment, the shortest distance between both ends of the heat shrink tubing 200 and both ends of the iron core body 100 along the length direction is 50mm.
[0032] Assembly method:
[0033] When assembling this flexible iron core, the first stack 110, the second stack 120 and the third stack 130 are first stacked in sequence and combined to form the iron core body 100, so that the first slot 112, the second slot 122 and the third slot 132 are correspondingly matched to form the positioning slot 140. Then, the heat shrink tube 200 is sleeved on the outer wall of the iron core body 100, and the heat shrink tube 200 is heated to shrink and fit against the outer wall of the iron core body 100.
[0034] How to use:
[0035] Seen in Figure 5 The iron core body 100 is wound around a hook to insert the second lamination 120 between the first lamination 110 and the third lamination 130, so that the first through hole 111, the second through hole 121 and the third through hole 131 coincide. A core-pulling rivet or a bolt and nut are used to install the core body 100 at the first through hole 111, the second through hole 121 and the third through hole 131, so that the iron core body 100 can maintain the wound state, thereby facilitating subsequent operations such as winding coils on the outer wall of the flexible iron core.
[0036] It is readily understood that those skilled in the art can combine, split, or reorganize the embodiments provided in this application to obtain other embodiments, all of which do not exceed the protection scope of this application.
[0037] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the embodiments shown are only part of the embodiments of the present invention. The actual structure is not limited to this. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.
Claims
1. A flexible core, characterized in that, The iron core body is sleeved with a heat shrink tube, the iron core body comprises a first lamination, a second lamination and a third lamination with increasing lengths in sequence, the first lamination, the second lamination and the third lamination are sequentially attached, the first lamination is provided with a first through hole penetrating one end thereof, the second lamination is provided with a second through hole penetrating one end thereof away from the first through hole, and the third lamination is provided with a third through hole penetrating one end thereof close to the first through hole.
2. The flexible core of claim 1, wherein, The shortest distance between the first through hole and the length direction end face of the first lamination is 5mm, and the radius of the first through hole is 2.5mm.
3. The flexible core of claim 1, wherein, The shortest distance between the second through hole and the length direction end face of the second lamination is 5mm, and the radius of the second through hole is 2.5mm.
4. The flexible core of claim 1, wherein, The shortest distance between the third through hole and the length direction end face of the third lamination is 5mm, and the radius of the third through hole is 2.5mm.
5. The flexible core of claim 1, wherein, The number of the first lamination, the second lamination and the third lamination is 2.
6. The flexible core of claim 1, wherein, The thickness of the first lamination, the second lamination and the third lamination is 0.35mm.
7. The flexible core of claim 1, wherein, The first lamination is provided with a first notch penetrating both ends in the width direction, the second lamination is provided with a second notch penetrating both ends in the width direction, the third lamination is provided with a third notch penetrating both ends in the width direction, and the first notch, the second notch and the third notch correspondingly match to form a positioning groove when the first lamination, the second lamination and the third lamination are sequentially attached.
8. The flexible core of claim 7, wherein, The first notch, the second notch and the third notch are square notches with a side length of 1mm.
9. The flexible core of claim 1, wherein, The shortest distance between both ends in the length direction of the heat shrink tube and both ends in the length direction of the iron core body is 50mm.