Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F27/00—Details of transformers or inductances, in general
  • H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F27/00—Details of transformers or inductances, in general
  • H01F27/28—Coils; Windings; Conductive connections
  • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
  • H01F27/306—Fastening or mounting coils or windings on core, casing or other support

Definitions

• the present disclosure is related to a coil block fixation system for a transformer and a corresponding transformer.
• Transformers are installed for example in wind-power facilities and can be subject to instantaneous accelerations due to high loads that may occur during operation, transportation and others. Such extreme loading conditions have to be counteracted to contribute to a longer service life and a reliable operation of the transformer and its windings. Consequently, it is a task to provide a system for a transformer that enables to withstand such challenging operational conditions.
• a coil block fixation system for a transformer comprises a coil block body with a bottom surface that is configured for coupling to a coil of the transformer.
• the coil block fixation system further comprises a supporting plate with a bottom surface that is coupled to an upper surface of the coil block body opposite the bottom surface of the coil block body.
• the coil block fixation system further comprises at least two rods that are coupled to an upper surface of the supporting plate opposite the bottom surface of the supporting plate for setting a load to the supporting plate towards the coil block body.
• the coil block fixation system further comprises at least two spring elements. At least one spring element is coupled to each rod such that each rod interacts with at least one spring element and such that the load set to the supporting plate is provided with a given flexibility with respect to a mounting direction from the coil block body to the rods.
• fixation system By use of the described fixation system a transformer is feasible and enables to withstand accelerations due to high loads during operation, transportation and others.
• the fixation system provides a specific configuration that combines an advantageous compromise between high stability and flexibility of the transformer in view of movements that are unavoidable.
• the supporting plate comprises one or more protrusions that extend into corresponding one or more recesses of the coil block body and that form a respective movement limiter to counteract a translation and/or a rotation of the supporting plate relative to the coil block body.
• the supporting plate comprises a lateral movement limiter formed at a side surface of the supporting plate extending into a lateral recess of the coil block body formed in an upper surface or wall of the coil block body.
• a lateral movement limiter can reliably counteract an unwanted rotation of the supporting plate around an axis of rotation which may be parallel to a longitudinal axis of the elongated rod substantially.
• such a lateral movement limiter can counteract an unwanted translation in directed limited by a recess contour of the coil block body.
• the rods are formed as threaded pins each, and the coil block fixation system further comprises two or more nuts which are configured in coordination with the respective associated threaded pin. Due to the threaded pins and associated nuts as well as the spring elements the load set to the supporting plate is adjustable and fixable by means of the nuts screwed on the threaded pins. For example, the nuts are screwed on the threaded pins such that the nuts are arranged between the upper surface of the supporting plate and the one or more spring elements.
• the coils or windings of transformers are formed circularly in general and thus comprise a centre and an outer region.
• the aforementioned configuration can beneficially contribute to the stability and flexibility of the coil block fixation system and advantageously affect an operation of the transformer even despite unavoidable vibration movements.
• the specific location of the rods and their respective local load to the supporting plate can be adapted to the intended use and application of the associated transformer such that, for example, a higher level of stabilization is set up further outside than inside.
• the rods can be arranged further insider than outside or in a centre region of the supporting plate substantially.
• the supporting plate comprises a T-shape with a lower protrusion and lateral plate portions with respect to a cross section along the mounting direction.
• the lateral plate portions extends laterally outwards from the protrusion and contacts the upper surface of the coil block body. Accordingly, the lateral portions of the supporting plate can reliably counteract an unwanted rotation around an axis of rotation which may be parallel to a main extension plane or to the extrusion axis of the supporting plate.
• the coil block body can comprise at least one protrusion that extends into a corresponding recess of the supporting plate and that forms a respective movement limiter to counteract a translation and/or a rotation of the supporting plate relative to the coil block body.
• Such a configuration can also beneficially counteract an unwanted translation and/or rotation of the supporting plate relative to the coil block body.
• a transformer comprises a coil for converting voltage, and a coil block fixation system according to any of the preceding claims that is coupled to the coil.
• the transformer comprises two or more coils and the coil block fixation system can be coupled to both coils.
• the transformer comprises an embodiment of the coil block fixation system as described above, features and characteristics of the coil block fixation system are also disclosed with respect to the transformer and vice versa.
• transformers which can be installed in wind-power facilities, can be subject to instantaneous accelerations due to mechanical and/or electromechanical loads that may occur during operation, transportation and others.
• Mechanical shocks can occur from a rapid stop of the wind turbine blades or from geometrical and material configurations and the associated resonance frequencies, for example.
• Electromechanical shocks can appear in view of frequency requirements which have to be fulfilled in view of the associated amplitudes or other operation parameters of the transformer.
• Such high loading conditions highlights the inherent structural weakness in conventional fixing systems. Accordingly, it is a challenge to improve a transformer's ability to withstand such demanding operational conditions.
• the described coil block fixation system can counteract the aforementioned adverse effects and shortcomings.
• the coil block fixation system can be realized as squared shaped flange fixation that allows for stable and reliable operation of the transformer in particular in view of shock and sine beat load requirements due to its spring washers and the specific design options which contribute to an enhanced overall robustness.
• the rods and associated spring elements in interaction with the specific supporting plate and coil block body are specifically engineered to withstand high acceleration shocks.
• the coil block fixation system can contribute to prevent structural damages and performance issues under extreme loading condition.
• the spring elements preferably formed as spring washers, can reliably absorb thermal dilatation of a winding or coil of the transformer while maintaining beneficial stiffness, specifically tuned, to withstand dynamic loads. Thus, an overall resilience and performance of transformers can be improved even in view of high acceleration shocks.

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Springs (AREA)

Priority Applications (2)

Applications Claiming Priority (1)

Publications (1)

Family

ID=89620590

Family Applications (1)

Country Status (2)

Citations (7)

• 2024
  • 2024-01-16 EP EP24382037.0A patent/EP4589610A1/fr active Pending
  • 2024-11-21 WO PCT/EP2024/083053 patent/WO2025153215A1/fr active Pending

Patent Citations (7)

Also Published As

Similar Documents

Legal Events