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KR-102962437-B1 - Transformer Comprising a Separation Part Having an Upper-wide and Lower-narrow Structure between Low-voltage Windings and High-voltage Windings

KR102962437B1KR 102962437 B1KR102962437 B1KR 102962437B1KR-102962437-B1

Abstract

The present invention relates to a transformer having a gap section between a low-voltage winding section and a high-voltage winding section that is wider at the top and narrower at the bottom, comprising: an iron core (100) formed to extend in the vertical direction; a low-voltage winding section (230) wound along the circumference of the iron core (100); and a high-voltage winding section (240) wound along the circumference of the low-voltage winding section (230). A gap section (251), which is an air circulation space with a shape that is wider at the top and narrower at the bottom, is formed between the low-voltage winding section (230) and the high-voltage winding section (240). This allows for smooth air flow and reduces the number of windings wound on the upper side, thereby preventing the concentrated occurrence of insulation deterioration in a specific upper part of the winding section due to heat accumulation and facilitating heat dissipation, thereby improving the lifespan of the transformer and enhancing the operational efficiency of the transformer.

Inventors

  • 정원창
  • 천기정

Assignees

  • 주식회사 케이피일렉트릭

Dates

Publication Date
20260511
Application Date
20260320

Claims (9)

  1. Iron core (100) formed extending in the vertical direction; A low-voltage winding section (230) wound along the circumference of the above iron core (100); and High-voltage winding section (240) wound along the circumference of the low-voltage winding section (230); In a transformer equipped with, A separation section (251), which is an air circulation space with a shape that is wider at the top and narrower at the bottom, is formed between the low-pressure winding section (230) and the high-pressure winding section (240). The above high-voltage winding section (240) is characterized by the fact that the number of windings in the lower region winding section is greater than the number of windings in the upper region winding section, and the number of windings gradually decreases as one moves from the lower region to the upper region.
  2. In paragraph 1, The above high-voltage winding section (240) is characterized by the fact that the winding width of the lower region winding section is greater than the winding width of the upper region winding section, and the winding width gradually decreases as it goes from the lower region to the upper region.
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  4. Iron core (100) formed extending in the vertical direction; A low-voltage winding section (230) wound along the circumference of the above iron core (100); and High-voltage winding section (240) wound along the circumference of the low-voltage winding section (230); In a transformer equipped with, A separation section (251), which is an air circulation space with a shape that is wider at the top and narrower at the bottom, is formed between the low-pressure winding section (230) and the high-pressure winding section (240). The transformer is characterized in that the high-voltage winding section (240) includes a lower high-voltage first layer winding (242) and a high-voltage second layer winding (243) stacked directly above the high-voltage first layer winding (242), and the number of turns of the high-voltage first layer winding (242) is smaller than the number of turns of the high-voltage second layer winding (243).
  5. Iron core (100) formed extending in the vertical direction; A low-voltage winding section (230) wound along the circumference of the above iron core (100); and High-voltage winding section (240) wound along the circumference of the low-voltage winding section (230); In a transformer equipped with, A separation section (251), which is an air circulation space with a shape that is wider at the top and narrower at the bottom, is formed between the low-pressure winding section (230) and the high-pressure winding section (240). The transformer is characterized in that the above high-voltage winding section (240) includes a lower high-voltage first layer winding (242) and a high-voltage second layer winding (243) stacked directly above the high-voltage first layer winding (242), and the winding width of the high-voltage first layer winding (242) is smaller than the winding width of the high-voltage second layer winding (243).
  6. Iron core (100) formed extending in the vertical direction; A low-voltage winding section (230) wound along the circumference of the above iron core (100); and High-voltage winding section (240) wound along the circumference of the low-voltage winding section (230); In a transformer equipped with, A separation section (251), which is an air circulation space with a shape that is wider at the top and narrower at the bottom, is formed between the low-pressure winding section (230) and the high-pressure winding section (240). The transformer is characterized in that the high-voltage winding section (240) includes a lower high-voltage first layer winding (242) and a high-voltage second layer winding (243) stacked directly above the high-voltage first layer winding (242), and the winding width of the high-voltage second layer winding (243) gradually decreases as it moves toward the upper region.
  7. Iron core (100) formed extending in the vertical direction; A low-voltage winding section (230) wound along the circumference of the above iron core (100); and High-voltage winding section (240) wound along the circumference of the low-voltage winding section (230); In a transformer equipped with, A separation section (251), which is an air circulation space with a shape that is wider at the top and narrower at the bottom, is formed between the low-pressure winding section (230) and the high-pressure winding section (240). The transformer is characterized in that the high-voltage winding section (240) includes a lower high-voltage first layer winding (242) and a high-voltage second layer winding (243) stacked directly above the high-voltage first layer winding (242), and the number of windings gradually decreases as it goes toward the upper region based on the number of windings of the high-voltage second layer winding (243).
  8. Iron core (100) formed extending in the vertical direction; A low-voltage winding section (230) wound along the circumference of the above iron core (100); and High-voltage winding section (240) wound along the circumference of the low-voltage winding section (230); In a transformer equipped with, A separation section (251), which is an air circulation space with a shape that is wider at the top and narrower at the bottom, is formed between the low-pressure winding section (230) and the high-pressure winding section (240). A transformer characterized by having a first high-low voltage winding support member (310) that supports the upper end of the low voltage winding section (230) and the upper end of the high voltage winding section (240), and a second high-low voltage winding support member (320) that supports the lower end of the low voltage winding section (230) and the lower end of the high voltage winding section (240).
  9. In paragraph 8, A transformer characterized in that the first high-low voltage winding support member (310) and the second high-low voltage winding support member (320) are arranged spaced apart from each other along the circumference centered on the iron core (100).

Description

Transformer Comprising a Separation Part Having an Upper-wide and Lower-narrow Structure between Low-voltage Windings and High-voltage Windings The present invention relates to a transformer having a gap section that is wider at the top and narrower at the bottom between a low-voltage winding section and a high-voltage winding section, and more specifically, to a transformer having a winding structure in which a gap section that is wider at the top and narrower at the bottom is provided between a low-voltage winding section and a high-voltage winding section, which is an air circulation space with a shape that is wider at the top and narrower at the bottom, thereby facilitating heat dissipation from the low-voltage winding section and the high-voltage winding section by allowing natural convection of heat generated in the low-voltage winding section and the high-voltage winding section of the transformer, and thereby minimizing the relative acceleration of insulation performance degradation due to heat in the upper part of each winding section compared to the lower part of the winding section due to the occurrence of heat accumulation in the upper part of each winding section, thereby playing a positive role in the stable operation and life extension of the transformer. Generally, a transformer is an induction device that changes the value of alternating voltage or current using electromagnetic induction, and is composed of at least two winding coils and one or more iron cores. In such transformers, voltage conversion simultaneously implies current conversion, and they are manufactured in various capacities or sizes to obtain the required voltage and current values. In the case of a transformer core, a plurality of silicon steel plates forming a magnetic circuit are cut into a certain size and shape, and then the cut steel plates are stacked together to form the core, and the low-voltage winding and high-voltage winding are wound sequentially around the core. The transformer structure is manufactured in the form and structure shown in FIGS. 1, 2, and 3. The transformer in this form and structure may be manufactured as an external core type or an internal core type known in the art, and may be manufactured in various modified forms depending on the structure of the core, such as a wound core or an EI type core, single-phase, three-phase, capacity, and external shape depending on the installation location, and whether it is an oil-immersed or dry type. All transformers of various modified forms used in this field generally have a cross-sectional structure in which a winding (200) is combined around an iron core (100) and an iron wire (100). The low-voltage winding section (230) and the high-voltage winding section (240) constituting the winding (200) are in close contact with each other, or even if a gap (250) exists between the low-voltage winding section (230) and the high-voltage winding section (240), the gap space of the gap is the same within the range of work tolerance or assembly tolerance from the top of the winding section to the bottom of the winding section. In particular, the winding widths of the high-voltage winding sections are all of the same shape, and even including the insulator, the top and bottom of each winding section are formed as winding sections of the same width (in the description of the present invention, "same" means "same within the range of work tolerance or assembly tolerance"). In the case where the conventional low-voltage winding section and the high-voltage winding section are in close contact as described above, a space for discharging heat generated in each winding is not formed. Even if they are separated, transformers with a structure where the separation space is the same in the upper and lower parts generate the same amount of heat in each transformer winding, so natural convection does not occur in the upper and lower parts of the winding section, and due to the characteristics of the heat, heat accumulation is inevitable in the upper part of the winding. As with the transformer structure shown in Fig. 3, in the case of a 1000kVA 22.9kV/380~220V molded dry-type transformer, the temperature of the uppermost winding (220) at the point where the temperature rise stabilizes during rated operation is about 20℃ higher than that of the lowermost winding (210). These results are the results of our own experiments, and while there may be differences in transformer capacity, test conditions, environment, etc., it can be confirmed that the temperature at the top of the winding (220) is significantly higher than that at the bottom of the winding (210). (Here, the meanings of upper and lower are understood as the upper part and the lower part, respectively, when the height of the winding section (260) is divided equally, with the center as the center.) As such, in transformers with a structure where the low-voltage winding section and the high-voltage winding section are in clo