Coil device for regulating voltage of transformer
By using an alternating series connection of the upper and lower coils, the problems of low reactance and poor stability in transformer voltage regulating coils are solved, achieving a high mechanical strength coil structure that is easy to manufacture and control.
Patent Information
- Application Number
- CN202420990179.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-05-07
AI Technical Summary
The reactance height of the large spiral structure in the existing transformer voltage regulating coil is small, which makes it difficult to meet the requirements for short-circuit force, and the coil stability is poor. It is also difficult to manufacture, has high material cost, and is difficult to control coil height.
The upper and lower coils are connected in series alternately. The ends of each coil are led out from different sides of the iron core and connected by leads to form an alternating series connection, ensuring that the reactance height is equal to the mechanical height.
It significantly reduces short-circuit force, improves the production stability and mechanical strength of the coil, makes it easy to control the coil height, and reduces material costs.
Smart Images
Figure CN222380407U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of transformers, and more specifically, to a coil device used for transformer voltage regulation. Background Art
[0002] For transformers with voltage regulators on both coils, one voltage regulator coil is set inside the other voltage regulator coil as the inner coil. The voltage regulator coil as the inner coil usually adopts a large spiral structure. When calculating the short circuit, because the reactance height of the large spiral structure is very small, it will make it difficult to meet the short circuit force requirements.
[0003] Currently, there are two methods to solve the above problem: first, increase the copper wire, support bars and spacers in the coil; second, flatten the end of the large spiral structure.
[0004] However, the first method has the disadvantage of increased material costs and cannot meet impedance requirements when impedance is required. The second method has the disadvantage of being very difficult to manufacture and, when the voltage regulating wire gauge is too large, it is impossible to flatten the ends of the large spiral structure because the inclination angle of the ends of the large spiral structure relative to the plane of the transformer core ends is too large. During the coil pressing process, the coil has poor stability, the pads between the coils are easily dropped due to inclination, the coil height is difficult to control, and the coil is at risk of tipping over. Utility Model Content
[0005] In view of the status and shortcomings of the prior art, the purpose of the utility model is to provide a coil device for transformer voltage regulation, which arranges an upper coil and a lower coil so that the upper coil and the lower coil wind a wire once each time they are wound, and the two ends of each turn of the upper coil are led out from the upper part of the iron core, and the two ends of each turn of the lower coil are led out from the lower part of the iron core, and the ends of the coils of corresponding turns in the upper coil and the lower coil are connected by lead wires, so that the coils of corresponding turns in the upper coil and the lower coil are connected in series in an alternating manner, thereby solving the problems in the prior art that the height of the large spiral structure coil as the inner coil is difficult to control, the reactance height is small, and the short-circuit force is difficult to meet the requirements.
[0006] According to an embodiment of the utility model, a coil device for transformer voltage regulation is provided, comprising an upper coil of a first group of coils and a lower coil of a second group of coils and leads for connecting the upper coil and the lower coil, wherein the first group of coils and the second group of coils respectively have N turns of coils, wherein the two ends of each turn of the coil of the first group of coils are led out from the upper part of an iron core, and the two ends of each turn of the coil of the second group of coils are led out from the lower part of the iron core, wherein the ends of the coils of corresponding turns in the upper coil and the lower coil are connected by leads so that the coils of corresponding turns in the upper coil and the lower coil are connected in series in an alternating manner, wherein N is a positive integer.
[0007] Through the above method, the reactance height of the coil structure is equal to the mechanical height, which significantly reduces the short-circuit force. In addition, such a coil structure is easy to produce, stable in press-fitting, easy to control the coil height, and has good mechanical strength.
[0008] In the coil device for transformer voltage regulation according to the utility model, the leads connecting the ends of the first group of coils and the ends of the second group of coils are connected to the external switch through the tap, so that the upper coil and the lower coil are controlled by the external switch.
[0009] Through the above method, the transformer voltage can be flexibly adjusted.
[0010] In the coil device for transformer voltage regulation according to the utility model, the upper coil is arranged on the upper half of the iron core of the transformer, the first group of coils are sequentially wound on the iron core along the axial direction of the iron core at the upper half of the iron core, and the conductors of adjacent turns are separated by a predetermined interval, wherein each turn of the conductor in the first group of coils comprises: a first part, wound on the upper half of the iron core, having a first end and a second end, the first end and the second end being separated by a predetermined distance in the circumferential direction of the iron core to form a first gap between the first end and the second end; a second part, extending from the first end to the upper part of the iron core between the first gap along the axial direction of the iron core, and having a first end and a second end; The first coil is provided at the lower half of the core, and the second coil is wound on the core in sequence along the axial direction of the core, and the conductors of adjacent turns are spaced apart by a predetermined interval. The invention relates to a method for manufacturing a second coil of the present invention, wherein each turn of the wire in the second group of coils comprises: a fourth portion wound on the lower half of the core, having a first end and a second end, the first end of the fourth portion and the second end of the fourth portion being spaced apart in the circumferential direction of the core to form a second gap between the first end of the fourth portion and the second end of the fourth portion; a fifth portion extending from the first end of the fourth portion toward the lower portion of the core between the second gap along the axial direction of the core, and having a free end extending from the lower portion of the core; and a sixth portion extending from the second end of the fourth portion toward the lower portion of the core between the second gap along the axial direction of the core, and having a free end extending from the lower portion of the core. , wherein a second gap between the first end and the second end of the fourth portion of each turn of the wire in the second group of coils gradually increases from top to bottom in the axial direction of the iron core to form an inverted V-shaped opening symmetrical to the V-shaped opening in the upper half of the iron core, and the fifth portion and the sixth portion of each turn of the wire in the second group of coils extend toward the lower part of the iron core in the inverted V-shaped opening; and a lead wire connects the free end of the second portion and the free end of the third portion of each turn of the wire in the upper coil and the free end of the fifth portion and the free end of the sixth portion of each turn of the wire in the lower coil, so that each turn of the wire in the upper coil is alternately connected in series with each turn of the wire in the lower coil.
[0011] The upper coil and the lower coil are arranged in the above-mentioned specific manner, so that the upper coil and the lower coil are wound once for each turn, and the two ends of each turn of the upper coil are led out from the upper part of the iron core, and the two ends of each turn of the lower coil are led out from the lower part of the iron core. The ends of the corresponding turns of the upper coil and the lower coil are connected by the lead wire, so that the corresponding turns of the upper coil and the lower coil are connected in series in an alternating manner, so that the reactance height of the coil structure is equal to the mechanical height, and the short-circuit force is significantly reduced. In addition, such a coil structure is also easy to produce, stable in press-fitting, easy to control the coil height, and good in mechanical strength.
[0012] In the coil device for transformer voltage regulation according to the utility model, the conductor is a copper conductor.
[0013] In the coil device for transformer voltage regulation according to the utility model, the first group of coils includes a first turn of wire, a second turn of wire, a third turn of wire, ..., an N-1th turn of wire and an Nth turn of wire, and the sizes of the first gaps of the first turn of wire, the second turn of wire, the third turn of wire, ..., the N-1th turn of wire and the Nth turn of wire are from large to small, and the second group of coils includes a first turn of wire, a second turn of wire, a third turn of wire, ..., an N-1th turn of wire and an Nth turn of wire, and the sizes of the second gaps of the first turn of wire, the second turn of wire, the third turn of wire, ..., the N-1th turn of wire and the Nth turn of wire are from small to large, wherein the first turn of wire in the first group of coils is The sum of the size of the first gap and the size of the second gap in the first turn of wire of the second group of coils, the sum of the size of the first gap in the second turn of wire of the first group of coils and the size of the second gap in the second turn of wire of the second group of coils, the sum of the size of the first gap in the third turn of wire of the first group of coils and the size of the second gap in the third turn of wire of the second group of coils, ..., the sum of the size of the first gap in the N-1th turn of wire of the first group of coils and the size of the second gap in the N-1th turn of wire of the second group of coils, and the sum of the size of the first gap in the Nth turn of wire of the first group of coils and the size of the second gap in the Nth turn of wire of the second group of coils are all equal.
[0014] Through the above method, it is ensured that the resistance of the corresponding turns of wire in the upper coil and the lower coil are the same.
[0015] In the coil device for transformer voltage regulation according to the utility model, N is equal to 9.
[0016] In the coil device for transformer voltage regulation according to the utility model, each turn of wire in the upper coil is alternately connected in series with each turn of wire in the lower coil, comprising: the free end of the second part of the first turn of wire in the first group of coils is led to the external switch by a lead wire, the free end of the third part of the first turn of wire in the first group of coils is connected to the free end of the fifth part of the first turn of wire in the second group of coils by a lead wire, the free end of the sixth part of the first turn of wire in the second group of coils is connected to the free end of the second part of the Nth turn of wire in the first group of coils by a lead wire, the free end of the third part of the Nth turn of wire in the first group of coils is connected to the free end of the fifth part of the Nth turn of wire in the second group of coils, the free end of the sixth part of the Nth turn of wire in the second group of coils is connected to the free end of the second part of the second turn of wire in the first group of coils by a lead wire, The free end of the third portion of the second turn of wire in the first group of coils is lead-connected to the free end of the fifth portion of the second turn of wire in the second group of coils, the free end of the sixth portion of the second turn of wire in the second group of coils is lead-connected to the free end of the second portion of the N-1th turn of wire in the first group of coils, the free end of the third portion of the N-1th turn of wire in the first group of coils is lead-connected to the free end of the fifth portion of the N-1th turn of wire in the second group of coils, the free end of the sixth portion of the N-1th turn of wire in the second group of coils is lead-connected to the free end of the second portion of the third turn of wire in the first group of coils, and the free end of the third portion of the third turn of wire in the first group of coils is lead-connected to the free end of the fifth portion of the third turn of wire in the second group of coils, until each turn of wire in the upper coil is alternately connected in series with each turn of wire in the lower coil.
[0017] Through the above connection method, the problem of excessive voltage difference between coils is avoided.
[0018] In the coil device for transformer voltage regulation according to the present invention, the lead connecting the free end of the second part of each turn of the wire of the first group of coils and the free end of the sixth part of each turn of the wire in the second group of coils is connected to an external switch.
[0019] Through external switches, each turn of the upper coil and the lower coil can be controlled to flexibly adjust the voltage. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:
[0021] Figure 1 A partial schematic diagram of the appearance of a coil device for transformer voltage regulation according to the utility model is shown.
[0022] Figure 2 The figure shows a coil layout plan view of a coil device for transformer voltage regulation according to the utility model.
[0023] The reference numerals are as follows:
[0024] 1: Coil device for transformer voltage regulation
[0025] 10: Upper coil
[0026] 12: Lower coil
[0027] 14: Lead
[0028] 20: Iron core
[0029] 101: Part 1
[0030] 103: Part 2
[0031] 105: Part 3
[0032] 1011: First end of the first part
[0033] 1013: Second end of the first part
[0034] G1: First gap
[0035] 1031: End of the second part
[0036] 1051: End of the third part
[0037] 107: Part 4
[0038] 109: Part 5
[0039] 111: Part 6
[0040] 1071: The first end of the fourth part
[0041] 1073: The second end of the fourth part
[0042] G2: Second gap
[0043] 1091: End of the Fifth Section
[0044] 1111: End of the third section
[0045] 1101: The first turn of the upper coil
[0046] 1102: The second turn of the upper coil
[0047] 1103: The third turn of the upper coil
[0048] 110(N-1): The (N-1)th turn of the upper coil
[0049] 110N: Nth turn of wire of the upper coil
[0050] 1301: The first turn of the lower coil
[0051] 1302: The second turn of the lower coil
[0052] 1303: The third turn of the lower coil
[0053] 130(N-1): The (N-1)th turn of the lower coil
[0054] 130N: Nth turn of wire of the lower coil
[0055] 1104: The fourth turn of the upper coil
[0056] 1105: The fifth turn of the upper coil
[0057] 1106: The sixth turn of the upper coil
[0058] 1107: The seventh turn of the upper coil
[0059] 1108: The eighth turn of the upper coil
[0060] 1109: The ninth turn of the upper coil
[0061] 1304: The fourth turn of the lower coil
[0062] 1305: The fifth turn of the lower coil
[0063] 1306: The sixth turn of the lower coil
[0064] 1307: The seventh turn of the lower coil
[0065] 1308: The eighth turn of the lower coil
[0066] 1309: The ninth turn of the lower coil
[0067] 30: Tap. DETAILED DESCRIPTION
[0068] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.
[0069] The utility model provides a coil device for transformer voltage regulation. Figure 1 The figure shows a partial schematic diagram of the appearance of a coil device for transformer voltage regulation according to the utility model. Figure 2 The coil layout plan of the coil device for transformer voltage regulation according to the utility model is shown. Figure 1 and Figure 2 , a coil device for transformer voltage regulation according to the utility model is described.
[0070] like Figure 1 and Figure 2 As shown, the coil device 1 for transformer voltage regulation includes an upper coil 10, a lower coil 12 and a lead 14 (in Figure 1 not shown).
[0071] The upper coil 10 is disposed at the upper half of the transformer core 20. The upper coil 10 comprises a first group of coils which are sequentially wound on the core 20 along the axial direction of the core 20 at the upper half of the core 20, and adjacent conductors are separated by a spacer at a predetermined interval.
[0072] For each turn of the wire in the first set of coils, it has a first portion 101 , a second portion 103 and a third portion 105 .
[0073] The first portion 101 is wound around the upper half of the core 20 and has a first end 1011 and a second end 1013. The first end 1011 and the second end 1013 are spaced a predetermined distance apart in the circumferential direction of the core 20 to form a first gap G1 therebetween.
[0074] The second portion 103 extends from the first end 1011 to the upper portion of the core 20 between the first gaps G1 along the axial direction of the core 20. The second portion 103 has a free end portion 1031 extending from the upper portion of the core 20.
[0075] The third portion 105 extends from the second end 1013 to the upper portion of the core 20 between the first gaps G1 along the axial direction of the core 20. The third portion 105 has a free end portion 1051 extending from the upper portion of the core 20.
[0076] The first gap G1 between the first end 1011 and the second end 1013 of the first portion 101 of each turn of the wire in the first group of coils gradually increases from bottom to top in the axial direction of the iron core 20 to form a V-shaped opening. The second portion 103 and the third portion 105 of each turn of the wire in the first group of coils extend toward the upper portion of the iron core 20 in the V-shaped opening.
[0077] The lower coil 12 is arranged at the lower half of the transformer core 20. The lower coil comprises a second group of coils, wherein N turns of wire are sequentially wound on the core 20 along the axial direction of the core 20 at the lower half of the core 20, and adjacent wires are separated by a spacer at a predetermined interval.
[0078] For each turn of wire in the second set of coils, it has a fourth portion 107 , a fifth portion 109 and a sixth portion 111 .
[0079] The fourth portion 107 is wound around the lower half of the core 20 and has a first end 1071 and a second end 1073. The first end 1071 and the second end 1073 are spaced a predetermined distance apart in the circumferential direction of the core 20 to form a second gap G2 therebetween.
[0080] The fifth portion 109 extends from the first end 1071 to the lower portion of the core 20 between the second gaps G1 along the axial direction of the core 20. The fifth portion 109 has a free end portion 1091 extending from the lower portion of the core 20.
[0081] The sixth portion 111 extends from the second end 1073 to the lower portion of the core 20 between the second gaps G2 along the axial direction of the core 20. The sixth portion 111 has a free end portion 1111 extending from the lower portion of the core 20.
[0082] The second gap G2 between the first end 1071 and the second end 1073 of the fourth portion 107 of each turn of the wire in the second group of coils gradually increases from top to bottom in the axial direction of the iron core 20 to form an inverted V-shaped opening symmetrical to the V-shaped opening in the upper half of the iron core 20. The fifth portion 109 and the sixth portion 111 of each turn of the wire in the second group of coils extend toward the lower part of the iron core 20 in the V-shaped opening.
[0083] Here, each turn of the wire may be a copper wire, but the present invention is not limited thereto.
[0084] The lead wire 14 connects the free end 1031 of the second portion 103 and the free end 1051 of the third portion 105 of each turn of the wire in the upper coil 10 and the free end 1091 of the fifth portion 109 and the free end 1111 of the sixth portion 111 of each turn of the wire in the lower coil 12, thereby alternately connecting each turn of the wire in the upper coil 10 and each turn of the wire in the lower coil 12 in series.
[0085] like Figure 1As shown, the first group of coils of the upper coil 10 includes the first turn of wire 1101, the second turn of wire 1102, the third turn of wire 1103, ..., the N-1 turn of wire 110 (N-1), and the N-th turn of wire 110N, which have the size of the first gap G1 from large to small. The second group of coils of the lower coil 12 includes the first turn of wire 1301, the second turn of wire 1302, the third turn of wire 1303, ..., the N-1 turn of wire 130 (N-1), and the N-th turn of wire 130N, which have the size of the second gap G2 from small to large.
[0086] In the coil device 1 for transformer voltage regulation according to the utility model, the sum of the size of the first gap in the first turn of wire 1101 of the first group of coils and the size of the second gap in the first turn of wire 1301 of the second group of coils, the sum of the size of the first gap in the second turn of wire 1102 of the first group of coils and the size of the second gap in the second turn of wire 1302 of the second group of coils, the sum of the size of the first gap in the third turn of wire 1103 of the first group of coils and the size of the second gap in the third turn of wire 1303 of the second group of coils, ..., the sum of the size of the first gap in the N-1 turn of wire 110 (N-1) of the first group of coils and the size of the second gap in the N-1 turn of wire 130 (N-1) of the second group of coils, and the sum of the size of the first gap in the N-1 turn of wire 110N of the first group of coils and the size of the second gap in the N-1 turn of wire 130N of the second group of coils are all equal.
[0087] In the coil device 1 for transformer voltage regulation according to the utility model, alternately connecting each turn of the wire in the upper coil 10 with each turn of the wire in the lower coil 12 in series may include: guiding the free end 1031 of the second portion 103 of the first turn of the wire 1101 in the first group of coils to the external switch with the lead 14, connecting the free end 1051 of the third portion 105 of the first turn of the wire 1101 in the first group of coils to the free end 1091 of the fifth portion 109 of the first turn of the wire 1301 in the second group of coils with the lead 14, and connecting the free end 1031 of the sixth portion 111 of the first turn of the wire 1301 in the second group of coils to the free end 1091 of the fifth portion 109 of the first turn of the wire 1301 in the second group of coils. The lead wire 14 is used to connect the free end 1031 of the second portion 103 of the N-th turn of wire 110N in the first group of coils, the free end 1051 of the third portion 105 of the N-th turn of wire 110N in the first group of coils is connected to the free end 1091 of the fifth portion 109 of the N-th turn of wire 130N in the second group of coils, the free end 1111 of the sixth portion 111 of the N-th turn of wire 130N in the second group of coils is connected to the free end 1031 of the second portion 103 of the second turn of wire 1102 in the first group of coils, and the second turn of wire 110N in the first group of coils is connected to the free end 1091 of the fifth portion 109 of the N-th turn of wire 130N in the second group of coils. The free end portion 1051 of the third portion 105 of 02 is connected to the free end portion 1091 of the fifth portion 109 of the second turn wire 1302 in the second group of coils by means of the lead wire 14. The free end portion 1111 of the sixth portion 111 of the second turn wire 1302 in the second group of coils is connected to the free end portion 1031 of the second portion 103 of the N-1th turn wire 110(N-1) in the first group of coils by means of the lead wire 14. The free end portion 1051 of the third portion 105 of the N-1th turn wire 110(N-1) in the first group of coils is connected to the free end portion 1031 of the second portion 103 of the N-1th turn wire 110(N-1) in the second group of coils by means of the lead wire 14. The free end portion 1091 of the fifth portion 109, the free end portion 1111 of the sixth portion 111 of the N-1th turn of wire 130 (N-1) in the second group of coils is connected to the free end portion 1031 of the second portion 103 of the third turn of wire 1103 of the first group of coils by the lead wire 14, and the free end portion 1051 of the third portion 105 of the third turn of wire 1103 of the first group of coils is connected to the free end portion 1091 of the fifth portion 109 of the third turn of wire 1303 in the second group of coils by the lead wire 14, and in this way, each turn of wire in the upper coil 10 and each turn of wire in the lower coil 12 are alternately connected in series.
[0088] In the coil device 1 for transformer voltage regulation according to the present invention, the lead connecting the free end 1031 of the second part 103 of each turn of the first group of coils and the free end 1111 of the sixth part 111 of each turn of the second group of coils is connected to an external switch.
[0089] For simplicity, Figure 1 and Figure 2 The figure shows that the upper coil includes 9 turns of wire and the lower coil includes 9 turns of wire, but the present invention is not limited to this, and the number of turns of wire included in the upper coil and the lower coil can be set as needed.
[0090] To better understand how to connect each turn of wire in the upper coil with each turn of wire in the lower coil alternately in series with the lead wire, Figure 2 A detailed description is further given.
[0091] exist Figure 2 , for the upper coil, it includes a first turn of wire 1101, a second turn of wire 1102, a third turn of wire 1103, a fourth turn of wire 1104, a fifth turn of wire 1105, a sixth turn of wire 1106, a seventh turn of wire 1107, an eighth turn of wire 1108, and a ninth turn of wire 1109. For the lower coil, it includes a first turn of wire 1301, a second turn of wire 1302, a third turn of wire 1303, a fourth turn of wire 1304, a fifth turn of wire 1305, a sixth turn of wire 1306, a seventh turn of wire 1307, an eighth turn of wire 1308, and a ninth turn of wire 1309.
[0092] For ease of understanding, in the upper coil, the free end of the second part and the free end of the third part of the first turn of the wire 1101 are marked with 3 and 3a, respectively, the free end of the second part and the free end of the third part of the second turn of the wire 1102 are marked with 5 and 5a, respectively, the free end of the second part and the free end of the third part of the third turn of the wire 1103 are marked with 7 and 7a, respectively, the free end of the second part and the free end of the third part of the fourth turn of the wire 1104 are marked with 9 and 9a, respectively, and the free end of the second part of the fifth turn of the wire 1105 is marked with 9 and 9a, respectively. The free end and the free end of the third part are marked with 11 and 11a respectively, the free end of the second part and the free end of the third part of the sixth turn of wire 1106 are marked with 10 and 10a respectively, the free end of the second part and the free end of the third part of the seventh turn of wire 1107 are marked with 8 and 8a respectively, the free end of the second part and the free end of the third part of the eighth turn of wire 1108 are marked with 6 and 6a respectively, and the free end of the second part and the free end of the third part of the ninth turn of wire 1109 are marked with 4 and 4a respectively.
[0093] In the lower coil, the free end of the fifth part and the free end of the sixth part of the first turn of the wire 1301 are marked with 4a and 4, respectively, the free end of the fifth part and the free end of the sixth part of the second turn of the wire 1302 are marked with 6a and 6, respectively, the free end of the fifth part and the free end of the sixth part of the third turn of the wire 1303 are marked with 8a and 8, respectively, the free end of the fifth part and the free end of the sixth part of the fourth turn of the wire 1304 are marked with 104a and 10, respectively, and the free end of the fifth part of the fifth turn of the wire 1305 is marked with 106a and 107a, respectively. The free end of the fifth part and the free end of the sixth part of the sixth turn of wire 1306 are marked with 12a and 12 respectively, the free end of the fifth part and the free end of the sixth part of the sixth turn of wire 1306 are marked with 11a and 11 respectively, the free end of the fifth part and the free end of the sixth part of the seventh turn of wire 1307 are marked with 9a and 9 respectively, the free end of the fifth part and the free end of the sixth part of the eighth turn of wire 1308 are marked with 7a and 7 respectively, and the free end of the fifth part and the free end of the sixth part of the ninth turn of wire 1309 are marked with 5a and 5 respectively.
[0094] The free end 3 of the first turn of the wire 1101 is connected to the external switch, the free end 3a of the first turn of the wire 1101 is connected to the free end 4a of the first turn of the wire 1301 by a lead wire, the free end 4 of the first turn of the wire 1301 is connected to the free end 4 of the ninth turn of the wire 1309 by a lead wire, the free end 4a of the ninth turn of the wire 1309 is connected to the free end 5a of the ninth turn of the wire 1309 by a lead wire, and the free end 5 of the ninth turn of the wire 1309 is connected to the free end 5 of the second turn of the wire 1102 by a lead wire. The free end 5a of the second turn of the wire 1102 is connected to the free end 6a of the second turn of the wire 1302 by a lead wire, the free end 6 of the second turn of the wire 1102 is connected to the free end 6 of the eighth turn of the wire 1108 by a lead wire, the free end 6a of the eighth turn of the wire 1108 is connected to the free end 7a of the eighth turn of the wire 1308 by a lead wire, the free end 7 of the eighth turn of the wire 1308 is guided to the free end 7 of the third turn of the wire 1103 by a lead wire, and the free end 7a of the third turn of the wire 1103 is guided to the free end 7a of the third turn of the wire 1103 by a lead wire. The free end 8a of the third turn wire 1303 is connected to the free end 8 of the seventh turn wire 1107 by a lead wire, the free end 8a of the seventh turn wire 1107 is connected to the free end 9a of the seventh turn wire 1307 by a lead wire, the free end 9 of the seventh turn wire 1307 is connected to the free end 9 of the fourth turn wire 1104 by a lead wire, the free end 9a of the fourth turn wire 1104 is connected to the free end 10a of the fourth turn wire 1304 by a lead wire, and the fourth turn wire 130 The free end 10 of the sixth turn wire 1104 is connected to the free end 10 of the sixth turn wire 1106 by a lead wire, the free end 10a of the sixth turn wire 1106 is guided to the free end 11a of the sixth turn wire 1306 by a lead wire, the free end 11 of the sixth turn wire 1306 is connected to the free end 11 of the fifth turn wire 1105 by a lead wire, the free end 11a of the fifth turn wire 1105 is connected to the free end 12a of the fifth turn wire 1305 by a lead wire, and the free end 12 of the fifth turn wire 1305 is connected to an external switch.
[0095] The eight leads connecting the free ends 4 to 11 in the upper coil and the free ends 4 to 11 in the lower coil are connected to an external switch through a tap 30, so that the upper coil and the lower coil can be controlled by the external switch, thereby enabling flexible transformer voltage regulation.
[0096] According to the coil device for transformer voltage regulation of the utility model, by setting the upper coil and the lower coil, the upper coil and the lower coil are wound once for each turn, the two ends of each turn of the upper coil are led out from the upper part of the iron core, and the two ends of each turn of the lower coil are led out from the lower part of the iron core, and the ends of the corresponding turns of the upper coil and the lower coil are connected by the lead wire, so that the corresponding turns of the upper coil and the lower coil are connected in series in an alternating manner, so that the reactance height of the coil structure is equal to the mechanical height, and the short-circuit force is significantly reduced. In addition, such a coil structure is also easy to produce, stable in press-fitting, easy to control the coil height, and good in mechanical strength.
[0097] The utility model of the coil device for transformer voltage regulation can be applied to various switches, including reactance switches and vacuum switches. The coil device for transformer voltage regulation is easy to produce, stable to install, easy to control the coil height, good mechanical strength, and high short circuit resistance.
[0098] The above are only preferred implementations of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.
Claims
1. A coil device (1) for transformer voltage regulation, characterized in that: include: An upper coil (10) having a first group of coils and a lower coil (12) having a second group of coils, and a lead wire (14) for connecting the upper coil and the lower coil, wherein the first group of coils and the second group of coils respectively have N turns of coils, wherein the two ends of each turn of the first group of coils are led out from the upper part of an iron core (20), and the two ends of each turn of the second group of coils are led out from the lower part of the iron core, wherein the ends of the coils of corresponding turns in the upper coil and the lower coil are connected by the lead wire so that the coils of corresponding turns in the upper coil and the lower coil are connected in series in an alternating manner, wherein N is a positive integer.
2. The coil device (1) for transformer voltage regulation according to claim 1, characterized in that: Lead wires connecting the ends of the first group of coils and the ends of the second group of coils are connected to an external switch through a tap, so that the upper coil and the lower coil are controlled by the external switch.
3. The coil device (1) for transformer voltage regulation according to claim 2, characterized in that: The upper coil (10) is arranged at the upper half of the iron core (20) of the transformer, the first group of coils is sequentially wound on the iron core along the axial direction of the iron core at the upper half of the iron core, and the conductors of adjacent turns are separated by a predetermined interval, wherein each turn of the conductor in the first group of coils has: a first portion (101) wound around the upper half of the core, having a first end (1011) and a second end (1013), wherein the first end and the second end are separated by a predetermined distance in the circumferential direction of the core to form a first gap (G1) between the first end and the second end; a second portion (103) extending from the first end along the axial direction of the core between the first gaps toward the upper portion of the core and having a free end portion (1031) extending from the upper portion of the core; and a third portion (105) extending from the second end along the axial direction of the core between the first gaps toward the upper portion of the core and having a free end portion (1051) extending from the upper portion of the core, The first gap between the first end and the second end of the first part of each turn of the wire in the first group of coils gradually increases from bottom to top in the axial direction of the iron core to form a V-shaped opening, and the second part and the third part of each turn of the wire in the first group of coils extend toward the upper part of the iron core in the V-shaped opening; The lower coil (12) is arranged at the lower half of the core, and the second group of coils is wound on the core in sequence along the axial direction of the core at the lower half of the core, and the conductors of adjacent turns are separated by the predetermined interval, wherein each turn of the conductor in the second group of coils has: a fourth portion (107) wound around the lower half of the core, having a first end (1071) and a second end (1073), wherein the first end of the fourth portion and the second end of the fourth portion are spaced apart in the circumferential direction of the core to form a second gap (G2) between the first end of the fourth portion and the second end of the fourth portion; a fifth portion (109) extending from the first end of the fourth portion along the axial direction of the core between the second gaps toward the lower portion of the core and having a free end portion (1091) extending from the lower portion of the core; and a sixth portion (111), extending from the second end of the fourth portion along the axial direction of the core between the second gaps toward the lower portion of the core, and having a free end portion (1111) extending from the lower portion of the core, wherein the second gap between the first end and the second end of the fourth portion of each turn of the wire in the second group of coils gradually increases from top to bottom in the axial direction of the iron core to form an inverted V-shaped opening symmetrical to the V-shaped opening in the upper half of the iron core, and the fifth portion and the sixth portion of each turn of the wire in the second group of coils extend toward the lower part of the iron core in the inverted V-shaped opening; and The lead wire (14) connects the free end of the second portion and the free end of the third portion of each turn of the wire in the upper coil and the free end of the fifth portion and the free end of the sixth portion of each turn of the wire in the lower coil, so that each turn of the wire in the upper coil is alternately connected in series with each turn of the wire in the lower coil.
4. The coil device (1) for transformer voltage regulation according to claim 3, characterized in that: The wire is a copper wire.
5. The coil device (1) for transformer voltage regulation according to claim 3, characterized in that: The first group of coils comprises a first turn of wire (1101), a second turn of wire (1102), a third turn of wire (1103), ..., an N-1 turn of wire (110(N-1)) and an N-1 turn of wire (110N), and sizes of the first gaps of the first turn of wire (1101), the second turn of wire (1102), the third turn of wire (1103), ..., the N-1 turn of wire (110(N-1)) and the N-1 turn of wire (110N) are arranged from large to small, The second group of coils comprises a first turn of wire (1301), a second turn of wire (1302), a third turn of wire (1303), ..., an N-1 turn of wire (130(N-1)) and an N-1 turn of wire (130N), and the sizes of the second gaps of the first turn of wire (1301), the second turn of wire (1302), the third turn of wire (1303), ..., an N-1 turn of wire (130(N-1)) and an N-1 turn of wire (130N) of the second group of coils are arranged from small to large. Among them, the sum of the size of the first gap in the first turn of wire of the first group of coils and the size of the second gap in the first turn of wire of the second group of coils, the sum of the size of the first gap in the second turn of wire of the first group of coils and the size of the second gap in the second turn of wire of the second group of coils, the sum of the size of the first gap in the third turn of wire of the first group of coils and the size of the second gap in the third turn of wire of the second group of coils, ..., the sum of the size of the first gap in the N-1th turn of wire of the first group of coils and the size of the second gap in the N-1th turn of wire of the second group of coils, and the sum of the size of the first gap in the Nth turn of wire of the first group of coils and the size of the second gap in the Nth turn of wire of the second group of coils are all equal.
6. The coil device (1) for transformer voltage regulation according to claim 5, characterized in that: N is equal to 9.
7. The coil device (1) for transformer voltage regulation according to claim 5, characterized in that: Each turn of the wire in the upper coil is alternately connected in series with each turn of the wire in the lower coil, comprising: The free end of the second portion of the first turn of wire (1101) in the first group of coils is led to an external switch, the free end of the third portion of the first turn of wire in the first group of coils is connected by a lead to the free end of the fifth portion of the first turn of wire (1301) in the second group of coils, the free end of the sixth portion of the first turn of wire in the second group of coils is connected by a lead to the free end of the second portion of the Nth turn of wire (110N) in the first group of coils, the free end of the third portion of the Nth turn of wire in the first group of coils is connected by a lead to the free end of the fifth portion of the Nth turn of wire (130N) in the second group of coils, the free end of the sixth portion of the Nth turn of wire in the second group of coils is connected by a lead to the free end of the second portion of the second turn of wire (1102) in the first group of coils, and the free end of the third portion of the second turn of wire in the first group of coils is connected by a lead to the free end of the Nth turn of wire (110N) in the second group of coils. The free end of the fifth portion of the second turn of wire (1302) in the two groups of coils, the free end of the sixth portion of the second turn of wire in the second group of coils are lead-connected to the free end of the second portion of the N-1th turn of wire (110(N-1)) in the first group of coils, the free end of the third portion of the N-1th turn of wire in the first group of coils is lead-connected to the free end of the fifth portion of the N-1th turn of wire (130(N-1)) in the second group of coils, the free end of the sixth portion of the N-1th turn of wire in the second group of coils is lead-connected to the free end of the second portion of the third turn of wire (1103) in the first group of coils, and the free end of the third portion of the third turn of wire in the first group of coils is lead-connected to the free end of the fifth portion of the third turn of wire (1303) in the second group of coils, until each turn of wire in the upper coil is alternately connected in series with each turn of wire in the lower coil.
8. The coil device (1) for transformer voltage regulation according to claim 7, characterized in that: A lead (14) connecting the free end of the second portion (103) of each turn of wire in the first set of coils and the free end of the sixth portion (111) of each turn of wire in the second set of coils is connected to the external switch.
Citation Information
Cited By
Lead device of voltage regulating coil of transformer and voltage regulating coil device of transformer
CN120108900A