High-voltage transmission power grid signal acquisition transformer insulation system
By adopting an in-packed lead structure and insulation design in the high-voltage transmission grid signal acquisition transformer, the problem that the insulation system cannot meet the high-voltage requirements is solved, the safety and reliability of the insulation system are improved, and the cost is reduced.
Patent Information
- Application Number
- CN202422056857.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-23
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-08-23
AI Technical Summary
The insulation system of the existing high-voltage transmission grid signal acquisition transformer cannot meet the high-voltage usage environment and high-voltage resistance requirements, resulting in insufficient insulation and safety.
The insulation system design is adopted, including coil frame, primary lead, secondary lead, primary coil and secondary coil. By winding the primary coil on the winding tube and leaving a spacing, it is isolated with insulating tape and insulating paper, combined with edge glue isolation, forming an inner-covered lead structure to improve insulation strength and pressure resistance.
In high-voltage resistance test, it ensures good insulation, safety and reliability, meets the requirements of the high-voltage usage environment, improves the safety and reliability of the insulation system, and reduces manufacturing costs.
Smart Images
Figure CN223155792U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electronic components, in particular to an insulation system for a signal acquisition transformer of a high-voltage transmission power grid. Background Art
[0002] A transformer is an extremely important electronic component in the electronics industry. A transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. Its main components are a primary coil, a secondary coil, leads, a coil bobbin, and an iron core (magnetic core). In electrical equipment and wireless circuits, it is commonly used for stepping up or down voltages, impedance matching, safety isolation, etc.
[0003] In order to meet the requirements of high-voltage use environments and high-voltage resistance, etc., a signal acquisition transformer for a high-voltage transmission power grid needs to be subjected to a high-voltage resistance test during production to determine the safety and insulation ability of the product. Therefore, it is crucial whether the insulation system of the high-voltage transformer can meet the requirements. At present, the conventional insulation system of a transformer usually cannot meet the high-voltage insulation requirements. Summary of the Invention
[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an insulation system for a signal acquisition transformer of a high-voltage transmission power grid that not only meets the requirements of high-voltage use environments and high-voltage resistance, but also can ensure good insulation, safety and reliability during the high-voltage resistance test in production, and has a simple structure.
[0005] To solve the above technical problem, the utility model adopts such an insulation system for a signal acquisition transformer of a high-voltage transmission power grid, which includes a coil bobbin, a primary lead, a secondary lead, a primary coil, and a secondary coil. The coil bobbin includes a winding tube, a front baffle, and a rear baffle. The front baffle and the rear baffle are respectively arranged at the front and rear ends of the winding tube. A front wire groove and a rear wire groove are respectively arranged at the upper ends of the front baffle and the rear baffle. The primary coil is wound around the winding tube, and the secondary coil is wound around the primary coil. The primary lead is embedded in the front wire groove. One end of the primary lead is arranged inside the front baffle and is connected to the primary coil, and the other end of the primary lead is arranged outside the front baffle. The secondary lead is embedded in the rear wire groove. One end of the secondary lead is arranged inside the rear baffle and is connected to the secondary coil, and the other end of the secondary lead is arranged outside the rear baffle. The primary coil is wound in the middle of the winding tube. There are intervals between the front and rear ends of the primary coil and the front baffle and the rear baffle respectively. An insulating tape is provided between the layers of the primary coil, an insulating paper is provided between the primary coil and the secondary coil, and two edge glues are respectively arranged on the inner sides of the front baffle and the rear baffle and on the insulating paper.
[0006] As a preferred embodiment of the present utility model, the wire winding tube is a square tube, the front baffle and the rear baffle are both rectangular, and the front wire outlet groove and the rear wire outlet groove are both frame-shaped grooves.
[0007] As a preferred embodiment of the present utility model, the spacing is 2.7 mm.
[0008] As a preferred embodiment of the present utility model, the insulating paper is DuPont insulating paper and is provided in two turns.
[0009] As a preferred embodiment of the present utility model, the edge glue is a non-woven fabric with a width of 7 mm and is provided in 5 turns.
[0010] As a preferred embodiment of the present utility model, the wire winding tube, the front baffle and the rear baffle are integrally formed as a single integral part.
[0011] After adopting the above structure, the present utility model has the following beneficial effects:
[0012] The insulation system of the high-voltage transmission power grid signal acquisition transformer of the present utility model includes a coil skeleton, a primary lead wire, a secondary lead wire, a primary coil and a secondary coil. The coil skeleton includes a wire winding tube, a front baffle and a rear baffle. The front baffle and the rear baffle are respectively arranged at the front and rear ends of the wire winding tube. The upper end of the front baffle and the upper end of the rear baffle are respectively provided with a front wire outlet groove and a rear wire outlet groove. The primary coil is wound around the wire winding tube, and the secondary coil is wound around the primary coil. The primary lead wire is embedded in the front wire outlet groove. One end of the primary lead wire is arranged inside the front baffle and is connected to the primary coil, and the other end of the primary lead wire is arranged outside the front baffle. The secondary lead wire is embedded in the rear wire outlet groove. One end of the secondary lead wire is arranged inside the rear baffle and is connected to the secondary coil, and the other end of the secondary lead wire is arranged outside the rear baffle. The primary coil is wound in the middle around the wire winding tube. There are spacings between the front and rear ends of the primary coil and the front baffle and the rear baffle respectively. An insulating tape is provided between the layers of the primary coil. An insulating paper is provided between the primary coil and the secondary coil. Two edge glues are respectively arranged on the inner sides of the front baffle and the rear baffle and on the insulating paper. With such a structure, the primary lead wire and the secondary lead wire adopt an in-package connection lead wire, which avoids the lead wire being easily damaged while preventing high-voltage arcs, and increases the insulation strength and tensile strength of the lead wire; the spacings are left at both ends of the primary coil and the method of interlayer insulation is adopted, which improves the insulation of the transformer; the insulating paper is provided between the primary coil and the secondary coil, which improves the withstand voltage; two edge glues are arranged at both ends of the wire winding tube for isolation, which can avoid high-voltage arcs; thus, when the transformer is subjected to a high-voltage test during production, good insulation, safety and reliability are ensured. When in use, the requirements of the high-voltage use environment and its own high-voltage resistance are met, and the safety is good and the reliability is high.
[0013] The bobbin of the present utility model is a square tube, the front baffle and the rear baffle are both rectangular, and the front wire outlet groove and the rear wire outlet groove are both frame-shaped grooves. In this way, the structure of the transformer can better adapt to the usage scenario.
[0014] The spacing of the present utility model is 2.7 mm. In this way, on the premise of relatively saving costs, the insulation of the transformer is further improved.
[0015] The insulating paper of the present utility model is DuPont insulating paper and is arranged in two turns. In this way, the voltage withstand of the primary coil and the secondary coil is further improved.
[0016] The side glue of the present utility model is non-woven fabric with a width of 7 mm and is arranged in 5 turns. In this way, the generation of electric arcs caused by high voltage can be further avoided.
[0017] The bobbin, the front baffle and the rear baffle of the present utility model are integrally formed as a whole part. In this way, this structure is relatively firm and reliable.
[0018] The structure of the present utility model is simple, easy to implement, convenient to install and operate, and has low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The following further describes in detail the specific embodiments of the present utility model with reference to the drawings.
[0020] Figure 1 It is a three-dimensional schematic diagram of a structure of the insulation system of the high-voltage transmission power grid signal acquisition transformer of the present utility model.
[0021] Figure 2 It is a three-dimensional schematic diagram of the coil skeleton, the primary coil, the spacing and the insulating tape of the present utility model.
[0022] Figure 3 It is a three-dimensional schematic diagram of the coil skeleton, the primary lead, the insulating paper and the side glue of the present utility model. SPECIFIC EMBODIMENTS
[0023] See Figure 1 、 Figure 2 and Figure 3A high-voltage transmission power grid signal acquisition transformer insulation system shown in the figure includes a coil skeleton 1, a primary lead 2, a secondary lead 3, a primary coil 4, and a secondary coil 5. The coil skeleton 1 includes a bobbin 1-1, a front baffle 1-2, and a rear baffle 1-3. The front baffle 1-2 and the rear baffle 1-3 are respectively arranged at the front and rear ends of the bobbin 1-1. A front wire slot 1-4 and a rear wire slot 1-5 are respectively arranged at the upper ends of the front baffle 1-2 and the rear baffle 1-3. The primary coil 4 is wound around the bobbin 1-1, and the secondary coil 5 is wound around the primary coil 4. The primary lead 2 is embedded in the front wire slot 1-4. One end of the primary lead 2 is arranged inside the front baffle 1-2 and is connected to the primary coil 4, and the other end of the primary lead 2 is arranged outside the front baffle 1-2. The secondary lead 3 is embedded in the rear wire slot 1-5. One end of the secondary lead 3 is arranged inside the rear baffle 1-3 and is connected to the secondary coil 5, and the other end of the secondary lead 3 is arranged outside the rear baffle 1-3. The primary coil 4 is wound in the middle of the bobbin 1-1. There are spaces 6 left between the front and rear ends of the primary coil 4 and the front baffle 1-2 and the rear baffle 1-3 respectively. Insulating tapes 7 are arranged between the layers of the primary coil 4, and insulating paper 8 is arranged between the primary coil 4 and the secondary coil 5. Two edge adhesives 9 are respectively arranged on the inner sides of the front baffle 1-2 and the rear baffle 1-3 and on the insulating paper 8. In practical applications, the insulating strength of the inner-encapsulated connecting lead is not less than 1000V (AC), and the tensile strength is not less than 10N.
[0024] As a preferred embodiment of the present invention, as shown in Figure 1 , Figure 2 and Figure 3 shown, the bobbin 1-1 is a square tube, the front baffle 1-2 and the rear baffle 1-3 are both rectangular, and the front wire slot 1-4 and the rear wire slot 1-5 are both frame-shaped grooves.
[0025] As a preferred embodiment of the present invention, as shown in Figure 1 and Figure 2 shown, the space 6 is 2.7mm. In practical applications, leaving a 2.7mm space at both ends of the primary coil and adopting the method of interlayer insulation not only saves costs but also further improves the insulation of the product.
[0026] As a preferred embodiment of the present invention, as shown in Figure 3 shown, the insulating paper 8 is DuPont insulating paper and is arranged in two circles. In practical applications, the insulation grade of each layer of DuPont insulating paper is greater than 4000V (AC). The two layers of DuPont insulating paper isolate the primary and secondary, and the withstand voltage between the primary and secondary increases by more than 8000V (AC).
[0027] As a preferred embodiment of the present invention, as shown in Figure 1 andFigure 3 As shown, the edge glue 9 is a non-woven fabric with a width of 7 mm, and is provided in 5 turns. In practical applications, 7 mm non-woven fabric edge glue is added to both ends of the insulating paper between the primary and the secondary for isolation to avoid the generation of electric arcs under high voltage.
[0028] As a preferred embodiment of the present utility model, as Figure 1 , Figure 2 and Figure 3 shown, the bobbin 1-1, the front baffle 1-2 and the rear baffle 1-3 are integrally formed as a single unit.
[0029] When the present utility model is produced, first, the primary coil 4 is wound in the center on the bobbin 1-1 of the coil bobbin 1. There is a space of 2.7 mm (spacing 6) between the front and rear ends of the primary coil 4 and the front baffle 1-2 and the rear baffle 1-3 respectively. An insulating tape 7 is wound between each layer of the primary coil 4 for isolation. After the primary coil 4 is wound, one end of each of the three primary leads 2 is welded to the winding ends and the middle tap of the primary coil 4 respectively. The other end of each of the three primary leads 2 is respectively embedded in the three front wire grooves 1-4 and extends outwards. Then, two turns of DuPont insulating paper (insulating paper 8) are wound on the primary coil 4. Next, a non-woven fabric with a width of 7 mm is wound 5 turns respectively on the insulating paper 8 near the inner side of the front baffle 1-2 and the inner side of the rear baffle 1-3 (edge glue 9). Then, the secondary coil 5 is wound on the edge glue 9 and the insulating paper 8. After the secondary coil 5 is wound, one end of each of the two secondary leads 3 is welded to the winding ends of the secondary coil 5 respectively. The other end of each of the two secondary leads 3 is respectively embedded in the two rear wire grooves 1-5 and extends outwards.
[0030] After testing, in actual production, the present utility model can avoid the easy injury of the leads while preventing high-voltage electric arcs, and increase the insulation strength and tensile strength of the leads, greatly improving the isolation degree and withstand voltage degree between the primary coil and the secondary coil, effectively avoiding the generation of electric arcs under high voltage, and having a simple structure, thus achieving good economic benefits.
Claims
1. A high-voltage transmission power grid signal acquisition transformer insulation system, comprising a coil skeleton (1), a primary lead (2), a secondary lead (3), a primary coil (4) and a secondary coil (5), wherein the coil skeleton (1) includes a bobbin (1-1), a front baffle (1-2) and a rear baffle (1-3), the front baffle (1-2) and the rear baffle (1-3) are respectively arranged at the front and rear ends of the bobbin (1-1), a front wire outlet groove (1-4) and a rear wire outlet groove (1-5) are respectively arranged at the upper ends of the front baffle (1-2) and the rear baffle (1-3), the primary coil (4) is wound on the bobbin (1-1), and the secondary coil (5) is wound on the primary coil (4), characterized in that: The primary lead wire (2) is embedded in the front wire outlet groove (1-4). One end of the primary lead wire (2) is arranged inside the front baffle (1-2) and connected to the primary coil (4), and the other end of the primary lead wire (2) is arranged outside the front baffle (1-2). The secondary lead wire (3) is embedded in the rear wire outlet groove (1-5). One end of the secondary lead wire (3) is arranged inside the rear baffle (1-3) and connected to the secondary coil (5), and the other end of the secondary lead wire (3) is arranged outside the rear baffle (1-3). The primary coil (4) is wound in the middle on the bobbin (1-1). There are spacings (6) between the front and rear ends of the primary coil (4) and the front baffle (1-2) and the rear baffle (1-3) respectively. An insulating tape (7) is provided between the layers of the primary coil (4). An insulating paper (8) is provided between the primary coil (4) and the secondary coil (5). Two side adhesives (9) are respectively arranged on the inner sides of the front baffle (1-2) and the rear baffle (1-3) and on the insulating paper (8).
2. The insulation system of the high-voltage transmission grid signal acquisition transformer according to claim 1, wherein: The bobbin (1-1) is a square tube, the front baffle (1-2) and the rear baffle (1-3) are both rectangular, and the front wire outlet groove (1-4) and the rear wire outlet groove (1-5) are both frame-shaped grooves.
3. The insulation system of the high-voltage transmission grid signal acquisition transformer according to claim 1, characterized in that: The spacing (6) is 2.7 mm.
4. The insulation system of the high-voltage transmission grid signal acquisition transformer according to claim 1, characterized in that: The insulating paper (8) is DuPont insulating paper and is arranged in two turns.
5. The insulation system of the high-voltage transmission grid signal acquisition transformer according to claim 1, wherein: The side adhesive (9) is a non-woven fabric with a width of 7 mm and is arranged in 5 turns.
6. The insulation system of the high-voltage transmission grid signal acquisition transformer according to claim 1, characterized in that: The bobbin (1-1), the front baffle (1-2) and the rear baffle (1-3) are an integral part formed integrally.