High-effect voltage transformer winding structure

Abstract

The utility model discloses a winding structure of a high-efficiency voltage transformer. The winding structure comprises an iron core, a winding assembly and a heat dissipation ring, the winding assembly comprises an insulated winding shell arranged on the outer surface of the iron core in a full-wrapping mode, winding grooves are formed in the outer surface of the winding shell, the multiple winding grooves are evenly arranged at intervals along the outer circumferential face and the inner circumferential face of the winding shell, at least one set of copper strips in the axis direction of the winding grooves are arranged in the winding grooves, and an insulating ring is detachably arranged on the periphery of the winding shell. The insulating ring abuts against the copper strip. The heat dissipation ring is detachably arranged on the peripheral surface of the winding assembly and abuts against the winding assembly, and a plurality of heat dissipation fins are evenly arranged in the heat dissipation ring at intervals. The iron core is completely wrapped in the winding shell with a good insulation effect, so that good side insulation can be realized, the air gap range of the iron core can be reduced, electric breakdown among the winding, the iron core and other components is effectively reduced, the reliability of equipment operation is improved, and the condition of abnormal test is avoided.

Description

Technical Field

[0001] This utility model relates to the field of transformer winding technology, and more specifically, it relates to a high-efficiency voltage transformer winding structure. Background Technology

[0002] Voltage transformers are similar to transformers in that they are instruments used to transform voltage. However, transformers transform voltage to facilitate the transmission of electrical energy, so their capacity is very large, usually measured in kilovolt-amperes or megavolt-amperes. On the other hand, voltage transformers transform voltage primarily to power measuring instruments and relay protection devices, to measure the voltage, power, and energy of lines, or to protect valuable equipment, motors, and transformers in the line when a fault occurs. Therefore, voltage transformers have a very small capacity, generally only a few volt-amperes or tens of volt-amperes, and the maximum is no more than one kilovolt-ampere.

[0003] Currently, due to the high voltage during operation, high-efficiency voltage transformers often have their withstand voltage tested by multiples to shorten testing time and facilitate batch testing, thereby increasing testing efficiency. However, this testing method places extremely high demands on the insulation between the winding and the core. Excessive voltage during testing often leads to abnormal test data, but this can result in misjudgments when the product is disassembled and inspected to ensure the internal insulation is intact. Therefore, there is an urgent need for a transformer winding structure that can handle test anomalies. Utility Model Content

[0004] The purpose of this invention is to provide a high-efficiency voltage transformer winding structure, a transformer winding structure that can reduce test anomalies.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a high-efficiency voltage transformer winding structure, including an iron core, a winding assembly and a heat dissipation ring.

[0006] The winding assembly includes an insulated winding shell that is fully covered on the outer surface of the iron core. A winding groove is formed on the outer surface of the winding shell. Several winding grooves are evenly spaced along the outer and inner circumferential surfaces of the winding shell. At least one set of copper strips along the axial direction of the winding grooves is provided in the winding grooves. An insulating ring is detachably provided on the outer circumference of the winding shell, and the insulating ring abuts against the copper strip.

[0007] The heat dissipation ring is detachably mounted on the outer peripheral surface of the winding assembly and abuts against the winding assembly. The heat dissipation ring is provided with several heat dissipation fins that are evenly spaced inside.

[0008] By completely enclosing the iron core within a well-insulated winding shell, good lateral insulation can be achieved, and the air gap range of the iron core can be reduced. This effectively reduces electrical breakdown between the winding and the iron core and other components, thereby improving the reliability of equipment operation and avoiding abnormal test situations.

[0009] Furthermore, by uniformly opening winding slots inside and outside the winding shell, the uniformity of the winding conductor can be achieved through forced regularization. This prevents magnetic field distortion and leakage caused by personnel's construction methods, thereby improving electromagnetic conversion efficiency, reducing energy loss, and further reducing the possibility of abnormal operating conditions such as short circuits and breakdowns.

[0010] The present invention is further configured such that: a plurality of winding grooves on the inner circumferential surface of the winding shell are inclined in the same direction, and a plurality of winding grooves on the outer circumferential surface of the winding shell are inclined in the same direction, and the winding grooves on the inner circumferential surface of the winding shell are inclined in opposite directions to the winding grooves on the outer circumferential surface.

[0011] The cross-shaped inner and outer winding grooves allow the copper strip to be evenly wound around the winding shell, thereby preventing magnetic field distortion and leakage.

[0012] The present invention is further configured such that the cross-section of the winding groove is semi-circular, and the groove depth decreases linearly from the inlet end to the outlet end.

[0013] The linearly decreasing groove depth can help avoid damage.

[0014] The present invention is further configured such that: the cross-section of the winding groove is one-third of a semicircle, and the groove depth increases linearly from the inlet end to the outlet end.

[0015] The linearly increasing groove depth of the winding groove can more firmly fix the winding, prevent the winding from shifting in subsequent processes, and eliminate the need to apply excessive tension to the winding.

[0016] The present invention is further configured such that: the cross-section of the winding groove is two-thirds of a semicircle, and the groove depth of the winding groove decreases linearly from the inlet end to the outlet end.

[0017] The linearly decreasing groove depth makes it easier for the wire to pass through at the bottom and facilitates manual construction operations.

[0018] The present invention is further configured such that the winding groove is helical and the groove opening diameter decreases linearly from the inlet end to the outlet end.

[0019] The setting of the spiral curvature enables the copper strip to achieve a mechanical self-locking effect, providing better anti-loosening performance.

[0020] The present invention is further configured such that the cross-section of the copper strip is a trapezoidal structure.

[0021] To better achieve the self-locking effect, the trapezoidal cross-section copper strip can better prevent the winding from falling off or shifting after being embedded in the winding shell, and the deformation of the short side of the winding will not affect the relative cross-section, making it less prone to breakage.

[0022] The present invention is further configured such that: a plurality of evenly spaced inner positioning grooves corresponding to the copper strip are provided on the inner side wall of the insulating ring, and a plurality of evenly spaced outer positioning grooves corresponding to the heat dissipation fins are provided on the outer side wall of the insulating ring.

[0023] The inner and outer positioning grooves correspond to the copper strip and heat dissipation fins respectively, which can make them more stable and less prone to displacement, and can also reinforce the copper strip of the winding in the reverse direction.

[0024] The present invention is further configured such that the cross-section of the inner positioning groove is arc-shaped, and the inclination direction of the inner positioning groove is consistent with that of the outer winding groove of the winding shell.

[0025] The side positioning groove and the outer winding groove of the winding shell should be tilted in the same direction to better slide and engage without damaging the copper strip.

[0026] The present invention is further configured such that: the cross-section of the outer positioning groove is triangular, and the groove depth of the outer positioning groove decreases linearly from both ends to the middle.

[0027] A groove depth with a certain curvature or contraction can provide a tight fit with the copper strip to a certain extent, preventing loosening.

[0028] In summary, this utility model has the following beneficial effects: by completely enclosing the iron core inside the winding shell with good insulation, good lateral insulation can be achieved and the air gap range of the iron core can be reduced, effectively reducing electrical breakdown between the winding and the iron core and other components, thereby improving the reliability of equipment operation and avoiding abnormal test situations. Attached Figure Description

[0029] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0030] Figure 2 This is an embodiment of the present utility model. Figure 1 The front view;

[0031] Figure 3 This is an embodiment of the present utility model. Figure 1 A sectional view;

[0032] Figure 4 This is a perspective view of the winding shell in an embodiment of this utility model;

[0033] Figure 5 This is a perspective view of the insulating plate in an embodiment of this utility model.

[0034] In the picture:

[0035] 1. Iron core;

[0036] 2. Winding assembly; 21. Winding shell; 211. Winding slot; 22. Copper strip;

[0037] 3. Heat dissipation ring; 31. Heat dissipation fins;

[0038] 4. Insulating board; 41. Inner positioning groove; 42. Outer positioning groove. Detailed Implementation

[0039] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0040] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0041] The following is in conjunction with the appendix Figure 1-5 The present invention will be described in further detail below.

[0042] Example

[0043] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, a high-efficiency voltage transformer winding structure includes an iron core 1, a winding assembly 2, and a heat dissipation ring 3.

[0044] The winding assembly 2 includes an insulated winding shell 21 that is fully covered on the outer surface of the iron core 1. A winding groove 211 is formed on the outer surface of the winding shell 21. A plurality of winding grooves 211 are evenly spaced along the outer and inner circumferential surfaces of the winding shell 21. At least one set of copper strips 22 along the axial direction of the winding grooves 211 is provided in the winding grooves 211. An insulating ring is detachably provided on the outer circumference of the winding shell 21, and the insulating ring abuts against the copper strips 22.

[0045] The heat dissipation ring 3 is detachably mounted on the outer peripheral surface of the winding assembly 2 and abuts against the winding assembly 2. The heat dissipation ring 3 is provided with a number of heat dissipation fins 31 evenly spaced inside.

[0046] By completely enclosing the iron core 1 within the well-insulated winding shell 21, good lateral insulation can be achieved, and the air gap range of the iron core 1 can be reduced. This effectively reduces electrical breakdown between the winding and the iron core 1 and other components, thereby improving the reliability of equipment operation and avoiding abnormal test conditions. Furthermore, by uniformly opening winding slots 211 inside and outside the winding shell 21, the uniformity of the winding conductor can be achieved through forced regularization. This prevents magnetic field distortion and leakage phenomena caused by personnel's construction methods, improves electromagnetic efficiency, and reduces energy loss, further reducing the possibility of abnormal operating conditions such as short circuits and breakdowns.

[0047] The winding grooves 211 on the inner circumferential surface of the winding shell 21 are all inclined in the same direction, and the winding grooves 211 on the outer circumferential surface of the winding shell 21 are all inclined in the same direction, and the winding grooves 211 on the inner circumferential surface of the winding shell 21 are inclined in opposite directions to the winding grooves 211 on the outer circumferential surface; the copper strip 22 can be evenly wound on the winding shell 21 by the intersecting inner and outer winding grooves 211, thereby preventing magnetic field distortion and magnetic leakage.

[0048] The cross-section of the winding groove 211 is semi-circular, and the groove depth of the winding groove 211 decreases linearly from the inlet end to the end end; the linear decrease in the groove depth of the winding groove 211 can avoid damage.

[0049] In this preferred embodiment, the cross-section of the winding groove 211 is a one-third semicircle, and the groove depth of the winding groove 211 increases linearly from the inlet end to the end end. The linear increase in the groove depth of the winding groove 211 can more stably fix the winding, prevent the winding from shifting in subsequent processes, and does not require applying too much tension to the winding.

[0050] In this embodiment, the preferred solution is that the cross-section of the winding groove 211 is two-thirds of a semicircle, and the groove depth of the winding groove 211 decreases linearly from the inlet end to the end end. The linear decrease in the groove depth of the winding groove 211 makes it easier for the winding to pass through at the bottom and is more conducive to manual construction operations.

[0051] In this preferred embodiment, the winding groove 211 is set with a helical curvature, and the groove diameter of the winding groove 211 decreases linearly from the inlet end to the end end; the helical curvature setting can achieve the mechanical self-locking effect of the copper strip 22 and has a better anti-loosening effect.

[0052] The cross-section of the copper strip 22 is trapezoidal. In order to better meet the self-locking effect, the trapezoidal cross-section of the copper strip 22 can better prevent it from falling off or displacing after being embedded in the winding shell 21, and the winding deformation of the short side will not affect the relative cross-section, making it less prone to breakage.

[0053] The inner wall of the insulating ring is provided with several evenly spaced inner positioning grooves 41 corresponding to the copper strip 22, and the outer wall of the insulating ring is provided with several evenly spaced outer positioning grooves 42 corresponding to the heat dissipation fins 31. The inner positioning grooves 41 and the outer positioning grooves 42 are respectively provided to make the copper strip 22 and the heat dissipation fins 31 more stable and less prone to displacement, and can also reinforce the copper strip 22 of the winding in the reverse direction.

[0054] The inner positioning groove 41 has an arc-shaped cross section, and the inner positioning groove 41 is inclined in the same direction as the outer winding groove 211 of the winding shell 21. The inner positioning groove 41 and the outer winding groove 211 of the winding shell 21 are inclined in the same direction so that they can slide and fit better without damaging the copper strip 22.

[0055] The outer positioning groove 42 has a triangular cross-section, and the groove depth of the outer positioning groove 42 decreases linearly from both ends to the middle; the groove depth with a certain curvature or contraction can fit tightly with the copper strip 22 to a certain extent to prevent loosening.

[0056] In this preferred embodiment, the heat dissipation ring 3 has two semi-circular structures, such as... Figure 2 As shown, the two semicircular rings have the same structure. A groove is provided on one section of the semicircular ring structure, and a slider is provided on the other section. The two semicircular ring structures are slidably arranged opposite each other.

[0057] In this embodiment, the preferred solution is that the heat dissipation fins 31 have a wave-shaped structure, and the corresponding outer positioning grooves 42 are also wave-shaped. The wave-shaped outer positioning grooves 42 can effectively prevent the semi-circular ring structure from easily loosening.

[0058] In this embodiment, the core 1 is made of multiple silicon steel sheets bonded together. The air gap between the silicon steel sheets can be effectively reduced by the fully covered integral insulating winding shell 21.

[0059] In this embodiment, the non-creative parts and the material parts will not be described in detail.

[0060] Beneficial effects: By completely enclosing the iron core 1 within the well-insulated winding shell 21, good lateral insulation can be achieved, and the air gap range of the iron core 1 can be reduced. This effectively reduces electrical breakdown between the winding and the iron core 1 and other components, thereby improving the reliability of equipment operation and avoiding abnormal test situations.

[0061] It should be noted that all features disclosed in this specification, or all steps in all methods or processes disclosed, may be combined in any way, except for mutually exclusive features and / or steps.

[0062] Furthermore, the specific embodiments described above are exemplary. Those skilled in the art can devise various solutions inspired by the disclosure of this utility model, and these solutions all fall within the scope of this utility model and its protection. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and not intended to limit the scope of the claims. The scope of protection of this utility model is defined by the claims and their equivalents.

Claims

1. A high performance voltage transformer winding structure, characterized by, include: Iron core (1); The winding assembly (2) includes an insulating winding shell (21) that is fully covered on the outer surface of the iron core (1). A winding groove (211) is provided on the outer surface of the winding shell (21). A plurality of winding grooves (211) are evenly spaced along the outer and inner circumferential surfaces of the winding shell (21). At least one set of copper strips (22) along the axial direction of the winding grooves (211) is provided in the winding grooves (211). An insulating ring is detachably provided on the outer circumference of the winding shell (21), and the insulating ring abuts against the copper strips (22). The heat dissipation ring (3) is detachably disposed on the outer peripheral surface of the winding assembly (2) and abuts against the winding assembly (2). The heat dissipation ring (3) is provided with a number of heat dissipation fins (31) evenly spaced inside.

2. A high performance voltage transformer winding structure according to claim 1, characterized in that: Several winding grooves (211) on the inner circumferential surface of the winding shell (21) are inclined in the same direction, and several winding grooves (211) on the outer circumferential surface of the winding shell (21) are inclined in the same direction, and the winding grooves (211) on the inner circumferential surface of the winding shell (21) and the winding grooves (211) on the outer circumferential surface are inclined in opposite directions.

3. A high performance voltage transformer winding structure according to claim 2, characterized in that: The cross-section of the winding groove (211) is semi-circular, and the groove depth of the winding groove (211) decreases linearly from the inlet end to the end end.

4. A high performance voltage transformer winding structure according to claim 2, characterized in that: The cross-section of the winding groove (211) is one-third of a semicircle, and the groove depth of the winding groove (211) increases linearly from the inlet end to the end end.

5. A high performance voltage transformer winding structure as claimed in claim 2, characterized in that: The cross-section of the winding groove (211) is two-thirds of a semicircle, and the groove depth of the winding groove (211) decreases linearly from the inlet end to the end end.

6. A high performance voltage transformer winding structure according to any one of claims 3 to 5, characterised in that: The winding groove (211) is set with a helical curvature, and the groove diameter of the winding groove (211) decreases linearly from the inlet end to the end end.

7. A high performance voltage transformer winding structure according to claim 6, characterized in that: The cross-section of the copper strip (22) is trapezoidal.

8. A high performance voltage transformer winding structure as claimed in claim 1, characterized in that: The inner wall of the insulating ring is provided with several evenly spaced inner positioning grooves (41) corresponding to the copper strip (22), and the outer wall of the insulating ring is provided with several evenly spaced outer positioning grooves (42) corresponding to the heat dissipation fins (31).

9. A high performance voltage transformer winding structure according to claim 8, characterized in that: The inner positioning groove (41) has a circular arc cross section, and the inner positioning groove (41) is inclined in the same direction as the outer winding groove (211) of the winding shell (21).

10. A high performance voltage transformer winding structure as claimed in claim 8, characterized in that: The cross-section of the outer positioning groove (42) is triangular, and the groove depth of the outer positioning groove (42) decreases linearly from both ends to the middle.

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