Transformer high-voltage coil structure with voltage regulating wire cake

Abstract

The utility model relates to a transformer high-voltage coil structure with a voltage regulating wire cake, and belongs to the technical field of transformer manufacturing. According to the technical scheme, a transformer high-voltage coil is of a structure that an upper high-voltage coil and a lower high-voltage coil are connected in parallel, the upper high-voltage coil and the lower high-voltage coil are symmetrically arranged, each high-voltage coil is composed of a high-voltage coil main coil cake and a transformer voltage-regulating coil cake, the transformer voltage-regulating coil cake is arranged at the tail end of the high-voltage coil main coil cake, and a voltage-regulating coil is not independently arranged; and the output end of the high-voltage coil of the transformer is led to the on-load voltage regulation switch, and the on-load voltage regulation function is realized by the on-load voltage regulation switch. The on-load voltage regulation power transformer has the positive effects that the on-load voltage regulation power transformer is not independently provided with a voltage regulation coil, the high-voltage coil adopts a structure that the head end is led out from the middle part of the coil and two paths are connected in parallel, the transformer voltage regulation coil cake is arranged at the tail end of the coil, and the voltage regulation coil cake and the main coil cake of the high-voltage coil form a whole, so that the transformer high-voltage coil with the voltage regulation coil cake is called. The size of a transformer body is reduced, and the cost of the transformer is reduced.

Description

Technical Field

[0001] The utility model relates to a transformer high-voltage coil structure with a voltage-regulating coil, belonging to the technical field of transformer manufacturing. Background Art

[0002] In the field of transformer technology, traditional on-load voltage-regulating power transformers generally adopt a structure with independently set voltage-regulating coils, for example: Chinese patent CN 202111318130.6 is named "A voltage-regulating structure and voltage-regulating method with a large voltage-regulating range of a transformer high-voltage winding" and CN 202320077823.9 is named "Transformer voltage-regulating winding and transformer", etc. The advantage of this structure is that the transformer high-voltage coil and the voltage-regulating coil are both independent coils with a simple structure, but the disadvantage is that the number of coils mounted on the transformer core is large and the cost is high. Utility Model Content

[0003] The utility model aims to provide a transformer high-voltage coil structure with a voltage-regulating wire cake. The on-load voltage-regulating power transformer does not have a voltage-regulating coil separately. The transformer high-voltage coil adopts a structure in which the head end is led out from the middle of the coil and two paths are connected in parallel. The transformer voltage-regulating wire cake is arranged at the end of the main wire cake of the high-voltage coil. The transformer voltage-regulating wire cake and the main wire cake of the high-voltage coil are integrated, which is called a transformer high-voltage coil with a voltage-regulating wire cake, which reduces the size of the transformer body, reduces the transformer cost, and solves the above-mentioned technical problems existing in the prior art.

[0004] The technical solution of the utility model is:

[0005] A transformer high-voltage coil structure with a voltage-regulating coil cake, wherein the transformer high-voltage coil adopts an upper and lower high-voltage coil parallel structure, wherein the upper high-voltage coil and the lower high-voltage coil are symmetrically arranged, and each high-voltage coil consists of a high-voltage coil main coil cake and a transformer voltage-regulating coil cake, wherein the transformer voltage-regulating coil cake is arranged at the end of the high-voltage coil main coil cake, and no voltage-regulating coil is arranged separately; and the transformer high-voltage coil outlet is led to an on-load voltage-regulating switch.

[0006] The high-voltage coil adopts an upper and lower parallel structure, the upper high-voltage coil and the lower high-voltage coil are wound in opposite directions, and the head end of the high-voltage coil is led out in parallel from the middle of the upper and lower high-voltage coils.

[0007] The transformer voltage regulating coil comprises a coarse regulating coil and a fine regulating coil connected to each other. The end of the high-voltage coil main coil and the head end of the coarse regulating coil are connected to lead out a terminal -, and the end of the coarse regulating coil leads out a terminal +; the fine regulating coil leads out W tapped terminals T1-TW; the terminals of the coarse regulating coil and the fine regulating coil are led to the on-load voltage regulating switch.

[0008] The high-voltage coil main wire cake includes a lower main coil wire cake and an upper main coil wire cake; the coarse adjustment wire cake includes a lower coarse adjustment wire cake and an upper coarse adjustment wire cake; the fine adjustment wire cake includes a lower fine adjustment wire cake and an upper fine adjustment wire cake; the lower main coil wire cake and the upper main coil wire cake are arranged symmetrically up and down, and are connected in parallel to form the high-voltage coil main wire cake of the transformer, and the middle of the high-voltage coil main wire cake is connected in parallel to the transformer high-voltage head end outlet A (B phase high-voltage coil leads to high-voltage head end outlet B, C phase high-voltage coil leads to high-voltage head end outlet C) ; The end of the lower main coil coil is provided with a lower coarse adjustment coil and a lower fine adjustment coil which are connected to each other, and the end of the upper main coil coil is provided with an upper coarse adjustment coil and an upper fine adjustment coil which are connected to each other; the lower coarse adjustment coil and the upper coarse adjustment coil are connected in parallel up and down to form the coarse adjustment coil of the transformer high-voltage coil, and the ends of the lower main coil coil and the upper main coil coil are respectively connected in parallel with the head ends of the lower coarse adjustment coil and the upper coarse adjustment coil to lead out a head -, and the ends of the lower coarse adjustment coil and the upper coarse adjustment coil are connected in parallel to lead out a head +.

[0009] The voltage regulation range of the high-voltage coil of the transformer with voltage-regulating wire cake is ±8×1.25% (maximum regulation 10%), the rated tap turns are N turns, the main wire cake turns of the high-voltage coil are set to N×(100%-10%) turns, the coarse-adjustment wire cake turns of the high-voltage coil are set to N×10% turns, and the fine-adjustment wire cake turns of the high-voltage coil are set to (N×1.25%)×8 turns.

[0010] The transformer voltage regulating coil comprises a coarse regulating coil and a fine regulating coil which are connected to each other. The end of the main coil of the high-voltage coil and the head end of the coarse regulating coil are connected to lead out a terminal -, and the end of the coarse regulating coil leads out a terminal +; the fine regulating coil leads out W tapped terminals T1-TW; the number of turns of the transformer designed according to different rated voltages, different capacities, and different voltage regulating ranges is variable; if the voltage regulating range is 110±10×1.25%, then if the rated tapping number of turns is N turns, the maximum voltage regulating range is 10×1.25%=12.5%, then the number of turns of the main coil of the high-voltage coil is N×(100%-12.5%), the number of turns of the coarse regulating coil of the high-voltage coil is N×12.5%, and the number of turns of the fine regulating coil of the high-voltage coil is (N×1.25%)×10 (10 taps).

[0011] The number of parallel wires of the fine-tuning coil can be changed according to different voltage regulation gears. For example, for a voltage regulation of ±10×1.25%, the number of parallel wires of the fine-tuning coil can be changed to 5 and wound to achieve the purpose of voltage regulation.

[0012] The positive effects of the utility model are as follows: the on-load voltage-regulating power transformer does not have a separate voltage-regulating coil, the high-voltage coil adopts a structure in which the head end is led out from the middle of the coil and two paths are connected in parallel, the transformer voltage-regulating wire cake is arranged at the end of the coil, the voltage-regulating wire cake and the main wire cake of the high-voltage coil are integrated, which is called a transformer high-voltage coil with a voltage-regulating wire cake, which reduces the size of the transformer body and reduces the transformer cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural diagram of the high voltage regulating coil of the transformer of the utility model embodiment;

[0014] Figure 2 This is a high voltage regulation principle diagram of the transformer according to the embodiment of the utility model;

[0015] Figure 3 A conversion table of the high voltage regulating turns of the transformer of the utility model embodiment;

[0016] In the figure: lower main coil coil 1X, upper main coil coil 1S, lower coarse adjustment coil 2X, upper coarse adjustment coil 2S, lower fine adjustment coil 3X, upper fine adjustment coil 3S, on-load tap changer OLTC. DETAILED DESCRIPTION

[0017] The present invention will be further described below through embodiments in conjunction with the accompanying drawings.

[0018] A transformer high-voltage coil structure with a voltage-regulating coil cake, wherein the transformer high-voltage coil adopts an upper and lower high-voltage coil parallel structure, wherein the upper high-voltage coil and the lower high-voltage coil are symmetrically arranged, and each high-voltage coil consists of a high-voltage coil main coil cake and a transformer voltage-regulating coil cake, wherein the transformer voltage-regulating coil cake is arranged at the end of the high-voltage coil main coil cake, and no voltage-regulating coil is arranged separately; the transformer high-voltage coil outlet is led to an on-load voltage-regulating switch, and the on-load voltage-regulating switch realizes the on-load voltage-regulating function.

[0019] The high-voltage coil adopts an upper and lower parallel structure, the upper high-voltage coil and the lower high-voltage coil are wound in opposite directions, and the head end of the high-voltage coil is led out in parallel from the middle of the upper and lower high-voltage coils.

[0020] The transformer voltage regulating coil comprises a coarse regulating coil and a fine regulating coil connected to each other, the end of the high-voltage coil main coil and the head end of the coarse regulating coil are connected to lead out a terminal -, and the end of the coarse regulating coil leads out a terminal +; the fine regulating coil leads out W tapped terminals T1-TW; the terminals of the coarse regulating coil and the fine regulating coil are led to an on-load voltage regulating switch, and the on-load voltage regulating function realized by the on-load voltage regulating switch means that the -, + and T1-TW of the coil are led to the corresponding contacts of the on-load voltage regulating switch, and the on-load voltage regulation is realized by the on-load switch transmission mechanism.

[0021] The high-voltage coil main wire cake includes a lower main coil wire cake 1X and an upper main coil wire cake 1S; the coarse adjustment wire cake includes a lower coarse adjustment wire cake 2X and an upper coarse adjustment wire cake 2S; the fine adjustment wire cake includes a lower fine adjustment wire cake 3X and an upper fine adjustment wire cake 3S; the lower main coil wire cake 1X and the upper main coil wire cake 1S are arranged symmetrically up and down, and are connected in parallel to form the high-voltage coil main wire cake of the transformer, and the middle of the high-voltage coil main wire cake is connected in parallel to the transformer high-voltage head end outlet A (the B-phase high-voltage coil leads to the high-voltage head end outlet B, and the C-phase high-voltage coil leads to the high-voltage head end outlet C); the lower main coil The end of the bobbin 1X is provided with a lower coarse adjustment bobbin 2X and a lower fine adjustment bobbin 3X which are connected to each other, and the end of the upper main coil bobbin 1S is provided with an upper coarse adjustment bobbin 2S and an upper fine adjustment bobbin 3S which are connected to each other; the lower coarse adjustment bobbin 2X and the upper coarse adjustment bobbin 2S are connected in parallel up and down to form the coarse adjustment bobbin of the high-voltage coil of the transformer, the ends of the lower main coil bobbin 1X and the upper main coil bobbin 1S are respectively connected in parallel with the head ends of the lower coarse adjustment bobbin 2X and the upper coarse adjustment bobbin 2S to lead out a terminal -, and the ends of the lower coarse adjustment bobbin 2X and the upper coarse adjustment bobbin 2S are connected in parallel to lead out a terminal +.

[0022] The voltage regulation range of the high-voltage coil of the transformer with voltage-regulating wire cake is ±8×1.25% (maximum regulation 10%), the rated tap turns are N turns, the main wire cake turns of the high-voltage coil are set to N×(100%-10%) turns, the coarse-adjustment wire cake turns of the high-voltage coil are set to N×10% turns, and the fine-adjustment wire cake turns of the high-voltage coil are set to (N×1.25%)×8 turns.

[0023] The transformer voltage regulating coil comprises a coarse regulating coil and a fine regulating coil which are connected to each other. The end of the main coil of the high-voltage coil and the head end of the coarse regulating coil are connected to lead out a terminal -, and the end of the coarse regulating coil leads out a terminal +; the fine regulating coil leads out W tapped terminals T1-TW; the number of turns of the transformer designed according to different rated voltages, different capacities, and different voltage regulating ranges is variable; if the voltage regulating range is 110±10×1.25%, then if the rated tapping number of turns is N turns, the maximum voltage regulating range is 10×1.25%=12.5%, then the number of turns of the main coil of the high-voltage coil is N×(100%-12.5%), the number of turns of the coarse regulating coil of the high-voltage coil is N×12.5%, and the number of turns of the fine regulating coil of the high-voltage coil is (N×1.25%)×10 (10 taps).

[0024] The number of parallel wires of the fine-tuning coil can be changed according to different voltage regulation gears. For example, for a voltage regulation of ±10×1.25%, the number of parallel wires of the fine-tuning coil can be changed to 5 and wound to achieve the purpose of voltage regulation.

[0025] The transformer high voltage of this embodiment is 110±8×1.25%. Figure 1As shown, the high-voltage coil adopts a parallel structure of upper and lower high-voltage coils. The upper high-voltage coil and the lower high-voltage coil are arranged symmetrically. Each high-voltage coil is composed of a high-voltage coil main wire cake and a transformer voltage regulating wire cake. The transformer voltage regulating wire cake includes a coarse regulating wire cake and a fine regulating wire cake that are interconnected.

[0026] Taking the high-voltage coil of phase A as an example, the main coil of the high-voltage coil of this phase includes the lower main coil coil 1X and the upper main coil coil 1S. The coarse adjustment coil includes the lower coarse adjustment coil 2X and the upper coarse adjustment coil 2S, and the fine adjustment coil includes the lower fine adjustment coil 3X and the upper fine adjustment coil 3S.

[0027] The lower main coil bobbin 1X and the upper main coil bobbin 1S are arranged symmetrically up and down and connected in parallel to form the high-voltage coil main bobbin of the transformer with 504 turns. The middle of the high-voltage coil main bobbin is connected in parallel to the high-voltage first-end outlet A of the transformer (the B-phase high-voltage coil leads to the high-voltage first-end outlet B, and the C-phase high-voltage coil leads to the high-voltage first-end outlet C); the end of the lower main coil bobbin 1X is provided with a lower coarse-adjustment bobbin 2X and a lower fine-adjustment bobbin 3X connected to each other, and the end of the upper main coil bobbin 1S is provided with an upper coarse-adjustment bobbin 2S and an upper fine-adjustment bobbin 3S connected to each other.

[0028] The lower coarse-adjusting coil 2X and the upper coarse-adjusting coil 2S are connected in parallel up and down to form the coarse-adjusting coil of the transformer high-voltage coil, with 56 turns. The ends of the lower main coil coil 1X and the upper main coil coil 1S are respectively connected in parallel with the beginnings of the lower coarse-adjusting coil 2X and the upper coarse-adjusting coil 2S to lead out the terminal -, and the ends of the lower coarse-adjusting coil 2X and the upper coarse-adjusting coil 2S are connected in parallel to lead out the terminal +.

[0029] The lower fine-tuning coil 3X and the upper fine-tuning coil 3S form a group, and four wires are wound in parallel, and each wire is wound with 7 turns, that is, Figure 1 Among them, 1A-7A, 1B-7B, 1C-7C, 1D-7D, 1E-7E, 1F-7F, 1G-7G, and 1H-7H form eight 7-turns, that is, 8×7=56 turns. The first and last ends of 1A-7A, 1B-7B, 1C-7C, 1D-7D, 1E-7E, 1F-7F, 1G-7G, and 1H-7H of the lower fine-tuning wire coil 3X and the upper fine-tuning wire coil 3S are connected in parallel respectively; the fine-tuning wire coil leads to nine branched outlets T1-T9 (W=9).

[0030] like Figure 2 As shown, Figure 1 The -, +, T1-T9 outputs from the middle coil are connected to the on-load switch contacts through lead wires. By operating the on-load switch, Figure 3 By changing the number of voltage regulation turns in the table, the voltage regulation purpose of 110±8×1.25% can be achieved.

[0031] like Figure 2 As shown in , the transformer high-voltage coil is composed of a high-voltage coil main wire cake, a coarse-adjusting wire cake and a fine-adjusting wire cake. The principle of turns distribution is as follows: the number of turns of the transformer at rated tapping is 504+56=560 turns, which is the sum of the turns of the transformer high-voltage coil main wire cake and the turns of the coarse-adjusting wire cake; the number of turns of the transformer at the minimum tapping is 504 turns, which is the number of turns of the transformer high-voltage coil main wire cake; the number of turns of the transformer at the maximum tapping is 504+56+8×7=616 turns, which is the sum of the turns of the transformer high-voltage coil main wire cake, the coarse-adjusting wire cake and the fine-adjusting wire cake; the number of turns of the transformer at other tappings is composed of the sum of the turns of the high-voltage coil main wire cake, the coarse-adjusting wire cake and the fine-adjusting wire cake. The number of main wire turns of the transformer high-voltage coil is 504, which is 90% of the rated tap turns of 560 turns of the transformer. The number of coarse-adjustment wire turns of the high-voltage coil is 56, which is 10% of the rated tap turns of 560 turns of the transformer. The number of fine-adjustment wire turns of the high-voltage coil is 8×7=56, which is 10% of the rated tap turns of 560 turns of the transformer, achieving the voltage regulation purpose of 110±8×1.25%.

[0032] In the utility model, the turns of the transformer high-voltage coil main wire cake, coarse adjustment wire cake, and fine adjustment wire cake are 504 turns, 56 turns, and 8×7=56 turns respectively for illustration. The number of turns of the transformer designed according to different rated voltages, different capacities, and different voltage regulation ranges can be changed. For example, if the voltage regulation range is 110±10×1.25%, then if the rated tapping turns are N turns, the maximum voltage regulation range is 10×1.25%=12.5%, then the number of turns of the high-voltage coil main wire cake is N×(100%-12.5%), the number of turns of the high-voltage coil coarse adjustment wire cake is N×12.5%, and the number of turns of the high-voltage coil fine adjustment wire cake is (N×1.25%)×10 (10 taps). At the same time, Figure 1 The number of parallel wires in the medium fine-tuning coil can also change with the voltage adjustment gear. Figure 1 The four wires 1A-7A, 1B-7B, 1C-7C, and 1D-7D can be changed to five wires in parallel to achieve ten tap changes.

Claims

1. A transformer high voltage coil structure with a voltage regulating coil, characterized in that: The transformer high-voltage coil adopts a parallel structure of upper and lower high-voltage coils. The upper high-voltage coil and the lower high-voltage coil are arranged symmetrically. Each high-voltage coil consists of a high-voltage coil main wire cake and a transformer voltage regulating wire cake. The transformer voltage regulating wire cake is set at the end of the high-voltage coil main wire cake, and no voltage regulating coil is set separately; the transformer high-voltage coil outlet is led to the on-load voltage regulating switch.

2. The transformer high voltage coil structure with a voltage regulating coil according to claim 1 is characterized in that: The transformer voltage regulating coil comprises a coarse regulating coil and a fine regulating coil connected to each other. The end of the high-voltage coil main coil and the head end of the coarse regulating coil are connected to lead out a terminal -, and the end of the coarse regulating coil leads out a terminal +; the fine regulating coil leads out W tapped terminals T1-TW; the terminals of the coarse regulating coil and the fine regulating coil are led to the on-load voltage regulating switch.

3. The transformer high voltage coil structure with a voltage regulating coil according to claim 2 is characterized in that: The high-voltage coil main wire cake comprises a lower main coil wire cake (1X) and an upper main coil wire cake (1S); the coarse adjustment wire cake comprises a lower coarse adjustment wire cake (2X) and an upper coarse adjustment wire cake (2S); the fine adjustment wire cake comprises a lower fine adjustment wire cake (3X) and an upper fine adjustment wire cake (3S); the lower main coil wire cake (1X) and the upper main coil wire cake (1S) are arranged symmetrically up and down and connected in parallel to form the high-voltage coil main wire cake of the transformer, and the middle of the high-voltage coil main wire cake is connected in parallel to the transformer high-voltage head end output A; the lower main coil wire cake (1X) is provided at the end thereof with a lower coarse adjustment wire cake connected to each other. (2X) and lower fine-adjustment coil (3X), the upper coarse-adjustment coil (2S) and upper fine-adjustment coil (3S) are connected to each other at the end of the upper main coil coil (1S); the lower coarse-adjustment coil (2X) and the upper coarse-adjustment coil (2S) are connected in parallel up and down to form the coarse-adjustment coil of the transformer high-voltage coil, the ends of the lower main coil coil (1X) and the upper main coil coil (1S) are connected in parallel with the beginning of the lower coarse-adjustment coil (2X) and the beginning of the upper coarse-adjustment coil (2S), and the ends of the lower coarse-adjustment coil (2X) and the upper coarse-adjustment coil (2S) are connected in parallel to lead out a terminal -.

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