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KR-20260065984-A - Stator for wind turbine generator, generator, and wind turbine

KR20260065984AKR 20260065984 AKR20260065984 AKR 20260065984AKR-20260065984-A

Abstract

A stator for a wind turbine generator comprises at least two phase windings (4) of phases (U, V, W), the phase windings (4) are arranged into multiple winding segments (5), each segment (5) has at least one output terminal (6, 7, 8) for each phase (U, V, W), individual phase windings (4) are connected to the output terminals and the output terminals (6, 7, 8) are connected to a busbar structure (18), each output terminal (6, 7, 8) comprises a bar-like, box-like, or plate-like connection terminal (14) connected to the holder (11) by a holder (11) attached to the stator structure (2) and at least one insulating element (13), and the connection terminal (14) is a flexible winding connection that connects individual phase windings (4) to the connection terminal (14). The cables (9) include connecting means to which they are connected, and the holders (11) have different heights to arrange the connecting terminals (14) on different planes.

Inventors

  • 아자르, 지아드
  • 유수포프, 알리셰르

Assignees

  • 지멘스 가메사 리뉴어블 에너지 아/에스

Dates

Publication Date
20260512
Application Date
20240812
Priority Date
20230907

Claims (11)

  1. As a stator for a wind turbine generator, It includes multiple phase windings (4) of at least two phases (U, V, W), and The above phase windings (4) are arranged into several winding segments (5), each segment (5) has at least one output terminal (6, 7, 8) for each phase (U, V, W), individual phase windings (4) are connected to the at least one output terminal (6, 7, 8), and the output terminals (6, 7, 8) are connected to a busbar structure (18), and each output terminal (6, 7, 8) includes a bar-like, box-like, or plate-like connection terminal (14) connected to the holder (11) by a holder (11) attached to a stator structure (2) and at least one insulating element (13), and the connection terminal (14) includes connection means to which flexible winding connection cables (9) are connected to the connection terminal (14) to connect the individual phase windings (4) to the connection terminal (14), and the Holders (11) have different heights to arrange the connection terminals (14) on different planes, Stator.
  2. In paragraph 1, The above connecting terminals (14) have longitudinal axes arranged radially at an angle of 45° to 135°, more specifically 70° to 110° with respect to the central axis of the cylindrical stator (1), Stator.
  3. In paragraph 1 or 2, The above holders (11) are U-shaped metal brackets (20), Stator.
  4. In any one of paragraphs 1 through 3, A carrier plate (24) is arranged on the insulating element (13), and the connecting terminal (14) is attached to the carrier plate (24). Stator.
  5. In any one of paragraphs 1 through 4, The above connection terminal (14) is a copper bar or a copper plate, Stator.
  6. In any one of paragraphs 1 through 5, The above connection terminals (14) include busbar connection means (15) for connecting each connection terminal (14) to each busbar of the busbar structure (18), and the busbar connection means (15) are arranged on the radially inner surface or end of the connection terminal (14). Stator.
  7. In any one of paragraphs 1 through 6, The output terminals (6, 7, 8) of the different phases (U, V, W) are arranged adjacent to each other. Stator.
  8. In any one of paragraphs 1 through 7, Phase windings (4) of a multisystem of three phases (U, V, W), six phases, or multiple phases are provided. Stator.
  9. A generator comprising a rotor (30) and a stator (1) according to any one of claims 1 to 8.
  10. In Paragraph 9, The above stator (1) is arranged inside the rotor (30). generator.
  11. A wind turbine including a generator (29) according to paragraph 9 or 10.

Description

Stator for wind turbine generator, generator, and wind turbine The present invention relates to a stator for a wind turbine generator comprising at least two phase windings, wherein the phase windings are arranged into multiple winding segments, each segment having at least one output terminal for each phase, individual phase windings are connected to at least one output terminal, and the output terminals are connected to a busbar structure. A stator for a wind turbine generator generally comprises multiple phase windings assigned to at least two different phases, or three different phases commonly referred to as U, V, and W phases. The windings are arranged around the perimeter of the stator. In the case of a direct-drive outer rotor generator, the stator is positioned inside the rotor, and the windings are arranged around the outer perimeter of the stator. The windings are generally arranged into multiple winding segments, each segment having at least one output terminal per phase. Each segment may have only a single output terminal per phase, or multiple output terminals per phase. In known generators, these output terminals are realized by busbars arranged around the perimeter of the stator, having an arced design. The busbars are manufactured using an extensive rolling process to obtain the required arced shape. For example, if three phases are realized, a total of six busbars are required to realize the output terminals for the three phases. Elongated, arc-shaped busbars are secured to specific supports fixed to the generator structure. In these supports, all busbars realizing individual output terminals are secured together. Since the busbars are arc-shaped and extend around the circumference, multiple such supports are required to secure the busbars along their length. The busbars are separated by insulating means and arranged in a stack where one busbar rests on top of another. The output terminals of the segments, i.e., the busbars, are additionally connected to a busbar structure, which is arranged further inside the windings and output terminal arrangement and generally extends around the approximately quadrant of the circular stator. The output terminals are also generally connected by additional connection pieces that have a bar-like shape. Each phase of the output terminal is connected to a phase-assigned busbar. The busbars constituting the output terminals are typically installed in the stator structure and then impregnated using a vacuum pressure impregnation method. In the event of a busbar failure, phase functionality is lost, which will result in the complete or partial loss of that specific segment or phase. Since the busbars are arranged in stacks and are impregnated, repairing any failure within this area is very difficult; this requires the generator to be completely shut down and partially disassembled by removing the busbars. It is highly complex and also very costly. The object of the present invention is to provide a stator having a simplified design of output terminals. To solve this purpose, the stator as described above comprises, for each output terminal, a holder attached to the stator structure and a bar-like or plate-line connection terminal connected to the holder by at least one insulating element, wherein the connection terminal comprises connection means to which flexible winding connection cables connecting individual phase windings to the connection terminal are connected, and the holders are characterized by having different heights to arrange the connection terminals in different planes. The stator of the present invention has a completely new design for the output terminals and the connection of the output terminals to the windings. Each output terminal associated with a specific phase is a separate arrangement, and since busbars are not used to realize these output terminals, the output terminals assigned to specific phases are not interconnected. Instead, each output terminal includes a holder attached to the stator structure. Each output terminal further includes a connecting terminal having a rod-shaped or plate-shaped form or design, which is connected to the holder by at least one insulating element to electrically isolate the connecting terminal from the holder and the stator structure, respectively. The windings assigned to individual phases are connected to individual connecting means provided at the connecting terminals by flexible winding connecting cables. Using these flexible winding connecting cables allows the individual winding to be guided to the individual local connecting terminal to which it is connected, making it easy to connect all individual windings to the local small connecting terminals of the output terminals assigned to the phases. The output terminals assigned to two or three individual phases are further designed so that the holders have different heights, and the connection terminals are ultimately arranged on different planes or d