CN213093010U - Multi-parallel-winding continuous coil - Google Patents
Multi-parallel-winding continuous coil Download PDFInfo
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- CN213093010U CN213093010U CN202021686897.5U CN202021686897U CN213093010U CN 213093010 U CN213093010 U CN 213093010U CN 202021686897 U CN202021686897 U CN 202021686897U CN 213093010 U CN213093010 U CN 213093010U
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Abstract
A multiple parallel wound continuous coil, comprising: the number of the parallel-wound wires of the coil is an even number, the coil is arranged in the first half line section of the coil, every two wires are taken as a group, standard transposition is adopted at the transition position between every two sections, all the wires subjected to the standard transposition are divided into 2 groups at the half part of the total turn number of the coil, special transposition is adopted, in the subsequent half line section, every two wires are taken as a group for the wires subjected to the special transposition at one time, and the standard transposition is adopted at the transition position between every two sections; after improvement, the total lengths of all the wires of the parallel-wound continuous coil are completely equal, the resistances of all the wires are the same, and the positions of the wires in a leakage magnetic field are the same, so that the circulating current in the parallel-connected wires is effectively controlled, the circulating current loss is reduced, the volume, the weight and the manufacturing cost of the transformer are reduced, the workload of winding transposition is reduced, various performance indexes of the coil are improved, and the structural strength, the product quality and the product operation reliability of the coil are improved.
Description
Technical Field
The utility model relates to a transformer component, concretely relates to many duplex winding continuous type coils for large capacity power transformer.
Background
For a large-capacity power transformer, a continuous coil of the large-capacity power transformer is generally of a multi-parallel winding structure, and the coil adopts a transposition mode which mainly comprises the following steps:
scheme 1: a plurality of parallel-wound continuous coils are subjected to standard transposition at the transition position between each section, the schematic diagram of the coil winding transposition is shown in figure 3, and the schematic diagram of the coil transposition principle is shown in figure 4;
scheme 2: the winding transposition schematic diagram of the coils is shown in figure 5, and the transposition principle schematic diagram of the coils is shown in figure 6;
there are problems in that:
(1) for a large-capacity transformer, when a coil adopts a continuous structure with a plurality of parallel-wound coils, although the total length of each wire and the resistance of each wire can be ensured to be the same by adopting the transposition mode of the scheme 1, because the positions of the parallel wires in a leakage magnetic field are different, circulating current can be generated in the parallel wires, and thus circulating current loss is generated; in addition, single transposition is adopted, the transposition frequency of each coil cake is equal to the number of parallel windings of the coil, the workload of coil winding transposition is very large, and meanwhile, because the number of parallel windings is large, the number of gears of the coil which usually participate in transposition during transposition is more than one half of the circumference, and the structural strength of the coil is poor, so that the transposition mode is mainly suitable for parallel winding type coils with 6 or less leads and is not suitable for multiple coils.
(2) The transposition frequency of the coil can be reduced by adopting a scheme 2 transposition mode, for example, when the coil adopts N parallel windings, the transposition frequency of each cake is only N/2, the transposition workload is reduced, meanwhile, the structural strength of the coil is improved due to the reduction of the transposition frequency, it can be seen from a standard transposition schematic diagram of two leads that the position of the lead in different groups is only changed during each transposition, the positions of the 2 leads in the same group are not changed all the time, the total length and the resistance of the two leads are different, and meanwhile, because the positions of the 2 leads in one group in a leakage magnetic field are different, circulating current can be generated in the parallel leads, so that circulating current loss is generated.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a many duplex winding continuous type coils to overcome the above-mentioned not enough that prior art exists.
For solving the above technical problem, the utility model discloses the technical scheme who takes is: a multiple parallel wound continuous coil, comprising: the number of the parallel-wound wires of the coil is an even number, every two wires of the coil are taken as a group in the first half wire section of the coil, standard transposition is adopted at the transition position between every two sections, all the wires subjected to the standard transposition are divided into 2 groups at the half position of the total number of turns of the coil, special transposition is adopted, every two wires of the subsequent half wire section are taken as a group in the wires subjected to the special transposition, and the standard transposition is adopted at the transition position between every two sections;
the standard transposition refers to that all the leads are sequentially transposed according to groups during transposition until all the sequences among the groups are exchanged, and the sequence of the leads in the groups is unchanged; the special transposition means that all the leads are divided into 2 groups during transposition, the 2 groups of leads are sequentially exchanged once, and the sequence of the leads in the group is not changed.
The further technical scheme is as follows: the number of the parallel-wound wires of the coil is 10, the sequence of the wires is 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10, every two wires of the coil are taken as one group and divided into five groups in the first half line segment of the coil, and standard transposition is adopted at the transition position between every two sections: the conductors with the serial numbers 1 and 2 are used as a first group, the conductors with the serial numbers 3 and 4 are used as a second group, the conductors with the serial numbers 5 and 6 are used as a third group, the conductors with the serial numbers 7 and 8 are used as a fourth group, the conductors with the serial numbers 9 and 10 are used as a fifth group, the sequence of the conductors in the group is not changed, and the sequence of the conductors in the five groups after transposition is changed into 9, 10, 7, 8, 5, 6, 3, 4, 1 and 2; at one half of the total number of turns of the coil, 10 leads which are subjected to one-time standard transposition are equally divided into an upper group and a lower group, and special transposition is adopted: the first group comprises the leads with serial numbers of 9, 10, 7, 8 and 5, the second group comprises the leads with serial numbers of 6, 3, 4, 1 and 2, the sequence of the leads in the group is not changed, the two groups of leads are exchanged in sequence once, the sequence of the two groups of leads after the transposition is changed into 6, 3, 4, 1, 2, 9, 10, 7, 8 and 5, namely the leads with serial numbers of 6, 3, 4, 1 and 2 are changed into the first group, and the leads with serial numbers of 9, 10, 7, 8 and 5 are changed into the second group; in the latter half line section of the coil, 10 leads which are subjected to one-time special transposition are re-divided into five groups by taking every two leads as a group, and standard transposition is adopted: the conductors numbered 6 and 3 are taken as a first group, the conductors numbered 4 and 1 are taken as a second group, the conductors numbered 2 and 9 are taken as a third group, the conductors numbered 10 and 7 are taken as a fourth group, the conductors numbered 8 and 5 are taken as a fifth group, the sequence of the conductors in the group is not changed, and the sequence of the conductors in the five groups after transposition is changed into 8, 5, 10, 7, 2, 9, 4, 1, 6 and 3.
Further: the thickness of the coil and the single conducting wire wound in parallel is not more than 2.5 mm.
Due to the adoption of the technical scheme, compare with prior art, the utility model relates to a many duplex winding continuous type coils has following beneficial effect:
1. the structure before improvement adopts a single wire transposition mode, the transposition times are more, and the mechanical strength of the coil is poorer; although the standard transposition is carried out by taking the two wires as a unit, the transposition frequency is reduced, the mechanical strength of the coil is improved, but the lengths of the two wires in the group are inconsistent, and the positions of the two wires in a leakage magnetic field are different, so that the circulation loss is increased;
under the condition of not increasing material cost and not reducing product performance index,
by changing the transposition mode of the coil wires, the transposition workload of a wire winder is reduced, various performance indexes of a plurality of parallel-wound continuous coils are improved, and the structural strength and the product quality of the coils and the reliability of product operation are improved;
2. the utility model relates to a many duplex winding continuous type coils, its coil use per two sets of wires to adopt the standard transposition for a unit transition department (the preceding half line section at the coil) between every two sections, adopt special transposition in the half department of coil total number of turns, and transition department adopts the standard transposition for a unit between every two sections at follow-up half line section with every two groups of lines, compares before improving: one-time special transposition is carried out at one-half of the total number of turns of the coil, so that the total length of each wire is completely equal, the resistance of each wire is the same, and the positions of a plurality of wires in a leakage magnetic field are the same, so that the circulating current and the circulating current loss in the parallel wires are effectively controlled, the volume and the weight of the transformer are reduced due to the reduction of the circulating current loss, and the manufacturing cost is reduced.
The technical features of a multi-parallel-wound continuous coil according to one embodiment of the present invention will be further described with reference to the accompanying drawings and embodiments.
Drawings
Fig. 1-2 show a multi-parallel winding continuous coil structure of the present invention:
fig. 1 is a schematic diagram of coil winding transposition, and fig. 2 is a schematic diagram of coil transposition principle;
fig. 3 to 4 show a conventional multi-parallel-wound continuous coil structure:
fig. 3 is a schematic diagram of coil winding transposition, and fig. 4 is a schematic diagram of coil transposition principle;
fig. 5 to 6 show a conventional multi-parallel-wound continuous coil structure:
fig. 5 is a schematic diagram of coil winding transposition, and fig. 6 is a schematic diagram of coil transposition principle;
in the figure:
h, a standard transposition interval of the front half of the coil, I, a special transposition interval of the middle part of the coil, J, a standard transposition interval of the rear half of the coil, A2 and C, coil codes and coil numbers are used for distinguishing coil cakes with different turns;
1. 2, 3, 4, 5, 6 … -line cake number.
Detailed Description
Example one
A multi-parallel-winding continuous coil is characterized in that the number of parallel-wound wires of the coil is even, every two wires are used as a group in the first half of the coil, standard transposition is adopted at the transition position between every two sections of the coil, all the wires subjected to the standard transposition are divided into 2 groups at the half of the total number of turns of the coil, special transposition is adopted, every two wires are used as a group in the subsequent half of the coil, and the standard transposition is adopted at the transition position between every two sections of the wires subjected to the special transposition;
the standard transposition refers to that all the leads are sequentially transposed according to groups during transposition until all the sequences among the groups are exchanged, and the sequence of the leads in the groups is unchanged; the special transposition means that all the leads are divided into 2 groups during transposition, the 2 groups of leads are sequentially exchanged once, and the sequence of the leads in the group is not changed.
Example two
A multi-parallel-wound continuous coil, the number of parallel-wound wires of the coil is 10, the sequence of the wires is 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10, in the first half line section of the coil, every two wires of the coil are divided into five groups, and standard transposition is adopted at the transition position between every two sections: the conductors with the serial numbers 1 and 2 are used as a first group, the conductors with the serial numbers 3 and 4 are used as a second group, the conductors with the serial numbers 5 and 6 are used as a third group, the conductors with the serial numbers 7 and 8 are used as a fourth group, the conductors with the serial numbers 9 and 10 are used as a fifth group, the sequence of the conductors in the group is not changed, and the sequence of the conductors in the five groups after transposition is changed into 9, 10, 7, 8, 5, 6, 3, 4, 1 and 2; (see FIG. 2, paragraph H)
At one half of the total number of turns of the coil, 10 leads which are subjected to one-time standard transposition are equally divided into an upper group and a lower group, and special transposition is adopted: the first group comprises the leads with serial numbers of 9, 10, 7, 8 and 5, the second group comprises the leads with serial numbers of 6, 3, 4, 1 and 2, the sequence of the leads in the group is not changed, the two groups of leads are exchanged in sequence once, the sequence of the two groups of leads after the transposition is changed into 6, 3, 4, 1, 2, 9, 10, 7, 8 and 5, namely the leads with serial numbers of 6, 3, 4, 1 and 2 are changed into the first group, and the leads with serial numbers of 9, 10, 7, 8 and 5 are changed into the second group; (see FIG. 2, paragraph I)
In the latter half line section of the coil, 10 leads which are subjected to one-time special transposition are re-divided into five groups by taking every two leads as a group, and standard transposition is adopted: the conductors with the serial numbers 6 and 3 are used as a first group, the conductors with the serial numbers 4 and 1 are used as a second group, the conductors with the serial numbers 2 and 9 are used as a third group, the conductors with the serial numbers 10 and 7 are used as a fourth group, the conductors with the serial numbers 8 and 5 are used as a fifth group, the sequence of the conductors in the group is not changed, and the sequence of the conductors in the five groups after transposition is changed into 8, 5, 10, 7, 2, 9, 4, 1, 6 and 3 (see the segment shown in figure 2J).
In the first and second embodiments: the thickness of the coil and the single conducting wire wound in parallel is not more than 2.5 mm.
Claims (3)
1. A multiple parallel wound continuous coil, comprising: the number of the parallel-wound wires of the coil is an even number, every two wires of the coil are taken as a group in the first half wire section of the coil, standard transposition is adopted at the transition position between every two sections, all the wires subjected to the standard transposition are divided into 2 groups at the half position of the total number of turns of the coil, special transposition is adopted, every two wires of the subsequent half wire section are taken as a group in the wires subjected to the special transposition, and the standard transposition is adopted at the transition position between every two sections;
the standard transposition refers to that all the leads are sequentially transposed according to groups during transposition until all the sequences among the groups are exchanged, and the sequence of the leads in the groups is unchanged; the special transposition means that all the leads are divided into 2 groups during transposition, the 2 groups of leads are sequentially exchanged once, and the sequence of the leads in the group is not changed.
2. A multiple and parallel continuous coil as claimed in claim 1, wherein: the number of the parallel-wound wires of the coil is 10, the sequence of the wires is 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10, every two wires of the coil are taken as one group and divided into five groups in the first half line segment of the coil, and standard transposition is adopted at the transition position between every two sections: the conductors with the serial numbers 1 and 2 are used as a first group, the conductors with the serial numbers 3 and 4 are used as a second group, the conductors with the serial numbers 5 and 6 are used as a third group, the conductors with the serial numbers 7 and 8 are used as a fourth group, the conductors with the serial numbers 9 and 10 are used as a fifth group, the sequence of the conductors in the group is not changed, and the sequence of the conductors in the five groups after transposition is changed into 9, 10, 7, 8, 5, 6, 3, 4, 1 and 2;
at one half of the total number of turns of the coil, 10 leads which are subjected to one-time standard transposition are equally divided into an upper group and a lower group, and special transposition is adopted: the first group comprises the leads with serial numbers of 9, 10, 7, 8 and 5, the second group comprises the leads with serial numbers of 6, 3, 4, 1 and 2, the sequence of the leads in the group is not changed, the two groups of leads are exchanged in sequence once, the sequence of the two groups of leads after the transposition is changed into 6, 3, 4, 1, 2, 9, 10, 7, 8 and 5, namely the leads with serial numbers of 6, 3, 4, 1 and 2 are changed into the first group, and the leads with serial numbers of 9, 10, 7, 8 and 5 are changed into the second group;
in the latter half line section of the coil, 10 leads which are subjected to one-time special transposition are re-divided into five groups by taking every two leads as a group, and standard transposition is adopted: the conductors numbered 6 and 3 are taken as a first group, the conductors numbered 4 and 1 are taken as a second group, the conductors numbered 2 and 9 are taken as a third group, the conductors numbered 10 and 7 are taken as a fourth group, the conductors numbered 8 and 5 are taken as a fifth group, the sequence of the conductors in the group is not changed, and the sequence of the conductors in the five groups after transposition is changed into 8, 5, 10, 7, 2, 9, 4, 1, 6 and 3.
3. A multi-piece, parallel-wound, continuous coil as claimed in claim 1 or 2, wherein: the thickness of the coil and the single conducting wire wound in parallel is not more than 2.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021686897.5U CN213093010U (en) | 2020-08-13 | 2020-08-13 | Multi-parallel-winding continuous coil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021686897.5U CN213093010U (en) | 2020-08-13 | 2020-08-13 | Multi-parallel-winding continuous coil |
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| CN213093010U true CN213093010U (en) | 2021-04-30 |
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| CN202021686897.5U Active CN213093010U (en) | 2020-08-13 | 2020-08-13 | Multi-parallel-winding continuous coil |
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