Double-layer multi-spiral coil wound by wires with unequal cross sections
By using a double-layer multi-helix coil wound with wires of unequal cross-section, the problem of circulating current caused by the difference in leakage magnetic flux between the inner and outer coil layers is solved, achieving uniform current distribution and inductance control, thus improving the safety and efficiency of the transformer.
Patent Information
- Application Number
- CN202422305478.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-22
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-09-22
AI Technical Summary
In existing double-layer multi-helix coils, after the transformer is in operation, the difference in spatial leakage flux between the inner and outer coils leads to an increase in circulating current between parallel conductors, which may cause local overheating and endanger the safety and reliability of the transformer, especially in large-capacity transformers and multi-helix cases.
A double-layer multi-helix coil is made by winding wires with different cross-sections. By winding wires with different axial dimensions on the inner and outer coils, the DC resistance of each wire is different when the wire length is the same. The resistance difference is used to cancel the circulating current. Combined with concentric setting and specific winding method, the current distribution and inductance characteristics are optimized.
It effectively reduces circulating current, avoids local overheating, improves the safety and reliability of the transformer and electromagnetic coupling efficiency, enhances the stability and current capacity of the coil, and reduces energy loss.
Smart Images
Figure CN223612203U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to transformer technical field more specifically, the utility model relates to a double -deck multi -spiral formula coil of unequal cross -section wire winding. BACKGROUND
[0002] Double -deck multi -spiral formula coil is a kind of multi -spiral formula coil with several parallel wires, coil is divided into the inner and outer two layers of opposite winding direction, two layers of wires are connected through transition at coil end portion, the partial leakage flux generated between two layers by the current flowing through coil is mutually offset, so as to reduce the eddy current loss of coil and surrounding structural member, with very high technical and economic performance, widely used in the low voltage winding of large capacity transformer.This structure coil uses multiple equal cross-section wires and is wound in parallel along the axial direction of the coil, and the wires are transposed in the axial direction while rising from the inner layer to the outer layer in the radial direction at one end of the coil.
[0003] However, since the layer rising and transposition of the coil are not performed at the same position but are uniformly distributed along the circumference within 360°, the actual number of turns of each parallel wire in the inner and outer layers is not equal, and since the spatial leakage flux of the inner and outer coil layers after the operation of the transformer is not the same, there is a circulating current between the parallel wires. When the capacity of the transformer is large and the number of spirals is large, the circulating current will also increase accordingly, which may cause the current on a certain parallel wire to be too large and generate a local overheating phenomenon, endangering the safety and reliability of the transformer. SUMMARY
[0004] The double -deck multi -spiral formula coil of unequal cross -section wire winding provided by the utility model solves the problem that the circulating current exists between the parallel wires due to the fact that the spatial leakage flux of the inner and outer coil layers after the operation of the transformer is not the same, and when the capacity of the transformer is large and the number of spirals is large, the circulating current will also increase accordingly, which may cause the current on a certain parallel wire to be too large and generate a local overheating phenomenon, endangering the safety and reliability of the transformer.
[0005] To achieve the above object, the utility model provides the following technical scheme: a double -deck multi -spiral formula coil of unequal cross -section wire winding, comprising an inner layer coil support column, an outer layer coil support column is sleeved on the outer side of the inner layer coil support column, and the inner layer coil support column and the outer layer coil support column are concentrically arranged;
[0006] A wire one, a wire two and a wire three are wound on the inner layer coil support column, and the bottom ends of the wire one, the wire two and the wire three are wound on the outer layer coil support column from bottom to top along the axis of the outer layer coil support column;
[0007] The wire one, the wire two and the wire three wound on the inner layer coil support column are the inner layer coil, and the wire one, the wire two and the wire three wound on the outer layer coil support column are the outer layer coil.
[0008] In a preferred embodiment, the wire one, the wire two and the wire three have the same radial dimension, and the wire one, the wire two and the wire three have the same cross-sectional area.
[0009] In a preferred embodiment, the wire one, the wire two and the wire three in the inner layer coil and the outer layer coil are wound in parallel.
[0010] In a preferred embodiment, the wire one, the wire two and the wire three in the inner layer coil and the outer layer coil are wound in parallel.
[0011] In a preferred embodiment, the wire one, the wire two and the wire three in the inner layer coil and the outer layer coil are wound in parallel.
[0012] In a preferred embodiment, the inner layer coil support column and the outer layer coil support column are both circular column structures, and the diameter of the inner layer coil support column is smaller than the diameter of the outer layer coil support column.
[0013] The utility model discloses the beneficial effect lies in:
[0014] 1、 the double -deck multi -spiral formula coil of unequal section wire winding that the utility model discloses adopts the wire winding of multiple unequal cross -sectional areas, and the coil still adopts multiple wires to be connected in parallel along the axial direction of the coil, and the size of each wire is completely same in the radial direction of the coil, and the cross -sectional area of each wire is changed by changing its axial dimension, thereby realizing that the length of the wire connected in parallel is same, and multiple wires connected in parallel have different direct current resistance.
[0015] 2、 the double -deck multi -spiral formula coil of unequal section wire winding that the utility model discloses, because the direct current resistance of multiple wires connected in parallel is different, when multiple wires are connected in parallel, the circulating current of the potential induced due to the different leakage magnetic of the coil geometry and the space where the coil is located and the circulating current of the parallel wire due to the different resistance of the parallel wire are offset each other. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is the three -dimensional structure schematic view of the coil structure schematic view of the utility model.
[0017] The reference signs are: 1, lead wire one; 2, lead wire two; 3, lead wire three; 4, inner coil support column; 5, outer coil support column. DETAILED DESCRIPTION
[0018] The following further describes the present application in conjunction with the accompanying drawings. It is necessary to point out here that the following detailed description is only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.
[0019] Referring to the drawings accompanying the specification Figure 1 A double-layer multi-spiral coil wound with unequal cross-section lead wires includes an inner coil support column 4, an outer coil support column 5 is sleeved on the outer side of the inner coil support column 4, and the inner coil support column 4 and the outer coil support column 5 are concentrically arranged; lead wire one 1, lead wire two 2 and lead wire three 3 are wound on the inner coil support column 4, and the bottom ends of the lead wire one 1, lead wire two 2 and lead wire three 3 are wound on the outer coil support column 5 from bottom to top along the axis of the outer coil support column 5; the lead wire one 1, lead wire two 2 and lead wire three 3 wound on the inner coil support column 4 are inner coils, and the lead wire one 1, lead wire two 2 and lead wire three 3 wound on the outer coil support column 5 are outer coils.
[0020] The implementation scenario is specifically: by winding lead wire one 1, lead wire two 2 and lead wire three 3 on the inner coil support column 4 and the outer coil support column 5, inner coils and outer coils are formed. The bottom ends of the lead wire one 1, lead wire two 2 and lead wire three 3 are wound on the outer coil support column 5 from bottom to top along the axis of the outer coil support column 5. The working principle of this double-layer multi-spiral coil is based on electromagnetic induction phenomenon. When electric current is passed through the lead wires of the inner coils and outer coils, a magnetic field will be generated around the coils. This magnetic field can be transmitted through the mutual inductance between the lead wires in the coils, thereby realizing the transfer and transmission of electromagnetic energy. The unequal cross-section lead wire arrangement of the inner coils and outer coils can control the resistance and inductance of the coils. Different cross-section lead wires have different resistance and inductance characteristics, so the total resistance and inductance values of the coils can be adjusted by reasonably designing and selecting the lead wire cross-section.
[0021] Through the structure of this double-layer multi-spiral coil, the total number of turns and the effective area of the coil can be increased, thereby improving the electromagnetic induction effect. At the same time, the concentric arrangement between the inner coils and the outer coils and the winding method of the lead wires can achieve high electromagnetic coupling efficiency.
[0022] This design can be applied to various electromagnetic devices and systems, such as transformers, inductors, inductive elements, etc., to achieve specific electromagnetic performance and functional requirements.
[0023] Referring to the drawings accompanying the specificationFigure 1 The radial dimensions of the first wire 1, the second wire 2 and the third wire 3 are the same, and the first wire 1, the second wire 2 and the third wire 3 have the same cross-sectional area, and the axial dimensions are different.
[0024] It should be noted that by adjusting the axial dimensions of the wires, a more uniform distribution of current within the coil can be achieved. Wires with larger axial dimensions can accommodate more current, while wires with smaller axial dimensions can limit the flow of current. This optimization of current distribution helps to reduce current concentration and hot spot phenomena, improving the efficiency and stability of the coil. The axial dimensions of the wires affect the inductance and resistance characteristics of the coil. Wires with larger axial dimensions can increase the inductance of the coil, while wires with smaller axial dimensions can reduce the inductance of the coil.
[0025] Referring to the drawings accompanying the specification Figure 1 The winding method of the first wire 1, the second wire 2 and the third wire 3 in the inner coil and the outer coil is parallel winding, and the first wire 1, the second wire 2 and the third wire 3 in the inner coil and the outer coil are arranged in parallel.
[0026] It should be noted that when the first wire 1, the second wire 2 and the third wire 3 are parallel wound, the total resistance of the wires will decrease, and parallel winding can increase the cross-sectional area of the wires, thereby reducing the resistance. Lower resistance means higher current transmission efficiency and less energy loss. Parallel winding can increase the capacity of the wires of the first wire 1, the second wire 2 and the third wire 3, i.e. the current load that the wires can withstand. By connecting multiple wires in parallel, the total cross-sectional area can be increased, thereby increasing the current capacity of the wires. This is very important for high-power applications and circuits with large current. By winding multiple wires in parallel, the reliability of the system can be improved. If one of the wires fails or is damaged, the other parallel wires can still work normally to maintain the connectivity of the circuit. This redundant design can reduce the risk of system failure and improve the reliability and stability of the overall system. Parallel winding can also reduce electromagnetic interference between the wires.
[0027] Referring to the drawings accompanying the specification Figure 1 Unlike the above parallel winding, the first wire 1, the second wire 2 and the third wire 3 in the inner coil and the outer coil are associated winding, which means that there is a certain electromagnetic coupling between them. In associated winding, the wires of the inner coil and the outer coil are connected to each other, and through electromagnetic induction, the current transfers energy between the two coils, and the first wire 1, the second wire 2 and the third wire 3 in the inner coil and the outer coil are connected to each other. The number of wires is not limited to three, but can also be other numbers of wires.
[0028] It should be noted that the wire association winding series winding is a technology that connects multiple wires together in sequence. When multiple wires are associated with winding, the total voltage will increase. This is because the association winding can stack the voltage of each wire in sequence, thereby obtaining a higher total voltage. This is very useful in certain specific applications, such as circuits or devices that require to provide a larger voltage. By associating multiple wires with winding, the flexibility of the system can be increased. The association winding allows the insertion of connection points or branches between the wires, so that the circuit can be adjusted or expanded as needed. This is very useful for applications that require variable or adjustable circuit topology. In wire association winding, current will pass through each wire in sequence. This can make the current evenly distributed among the wires, thereby avoiding some wires from bearing too high current and causing overheating or other problems. Therefore, wire association winding helps to achieve balanced distribution of current.
[0029] Referring to the drawings accompanying the specification Figure 1 , the arrangement order of the wire one 1, the wire two 2 and the wire three 3 from top to bottom in the axial direction of the inner coil support column 4 is wire three 3, wire two 2, wire one 1, and the arrangement order of the wire one 1, the wire two 2 and the wire three 3 from top to bottom in the axial direction of the outer coil support column 5 is wire one 1, wire two 2, wire three 3.
[0030] It should be noted that because the arrangement order of the wires on the inner coil and the outer coil is different, the effect of mutual cancellation of the electromagnetic field between them is better. This helps to reduce electromagnetic interference between the coils and improve the anti-interference ability of the entire system. By changing the arrangement order of the wires, the current distribution on the inner coil and the outer coil can be more uniform. This can avoid the situation that some wires bear too high current and cause imbalance, improve the stability and life of the coil. By adjusting the arrangement order of the wires, the inductance and resistance characteristics of the coil can be optimized.
[0031] Referring to the drawings accompanying the specification Figure 1 , the inner coil support column 4 and the outer coil support column 5 are both set as circular column structures, the diameter of the inner coil support column 4 is smaller than the diameter of the outer coil support column 5, and the cross-sectional shape of the inner coil support column 4 and the outer coil support column 5 viewed from above is circular.
[0032] It should be noted that the circular structure has advantages in the distribution of force. Compared with other shapes, such as square or rectangular, the circular structure can more evenly distribute stress. This helps to reduce stress concentration on the structure and improve the structural strength and stability of the inner coil support column 4 and the outer coil support column 5. The circular structure is also effective in providing support. Because the circle has uniform distribution characteristics, the circular cross section of the inner coil support column 4 and the outer coil support column 5 can provide uniform support force. This helps to maintain the geometric shape and stability of the coil.
[0033] The above embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but can not therefore be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled person in the art, without departing from the utility model concept, several deformations and improvements can be made, which belong to the protection range of the utility model.
Claims
1. A double-layer multi-spiral coil of unequal cross-section wire winding, characterized by, Include: The outer side of the inner layer coil support column (4) is sleeved with the outer layer coil support column (5), and the inner layer coil support column (4) and the outer layer coil support column (5) are concentrically arranged; The inner layer coil support column (4) is wound with wire one (1), wire two (2) and wire three (3), and the bottom end of the wire one (1), wire two (2) and wire three (3) is wound on the outer layer coil support column (5) along the axis of the outer layer coil support column (5) from bottom to top; The wire one (1), wire two (2) and wire three (3) wound on the inner layer coil support column (4) are inner layer coils, and the wire one (1), wire two (2) and wire three (3) wound on the outer layer coil support column (5) are outer layer coils.
2. A double layer multi-spiral coil of unequal cross-section wire winding according to claim 1, characterized in that: The winding mode of wire one (1), wire two (2) and wire three (3) in the inner layer coil and the outer layer coil is parallel winding, and wire one (1), wire two (2) and wire three (3) in the inner layer coil and the outer layer coil are arranged in parallel.
3. A double layer multi-spiral coil of unequal cross-section wire winding according to claim 2, characterized in that: The wire one (1), wire two (2) and wire three (3) in the inner layer coil and the outer layer coil are associated winding, and the wire one (1), wire two (2) and wire three (3) in the inner layer coil and the outer layer coil are connected with each other.
4. A double layer multi-spiral coil of unequal cross-section wire winding according to claim 3, characterized in that: The arrangement order of wire one (1), wire two (2) and wire three (3) from top to bottom in the axial direction of the inner layer coil support column (4) is wire three (3), wire two (2) and wire one (1) in turn, and the arrangement order of wire one (1), wire two (2) and wire three (3) from top to bottom in the axial direction of the outer layer coil support column (5) is wire one (1), wire two (2) and wire three (3) in turn.
5. A double layer multi-spiral coil of unequal cross-section wire winding according to claim 4, characterized in that: The inner layer coil support column (4) and the outer layer coil support column (5) are both arranged as circular column structure, and the diameter of the inner layer coil support column (4) is smaller than the diameter of the outer layer coil support column (5).