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.
• fixation system By use of the described fixation system a transformer is feasible that enables to withstand accelerations due to high loads during operation, transportation and others.
• the fixation system provides a specific design of the coil block body in coordination with the supporting plate on top which allows for an advantageous configuration with particular high mechanical stability of the transformer in view of compensation of movements that are unavoidable.
• the supporting plate and the coil block body are also possible to block or absorb unwanted movements and to contribute to a stable and reliable operation of the corresponding transformer.
• the coil body can comprise a cross-shaped recess and the supporting plate can comprise a cross-shape overall inserted into the coordinated cross-shaped recess of the coil block body.
• the coil block body comprises a protruding body wall forming a further lateral movement limiter that is adjacent to an inner edge of the supporting plate.
• a limiting wall can be formed on an inner edge of the coil block body with respect to an assembled state when the coil block fixation system is attached to a circular coil of the transformer, for example.
• the protruding body wall can reliably counteract an unwanted translation movement of the supporting plate towards the centre.
• the protruding body wall in contact with the adjacent edge of the supporting plate counteracts an unwanted rotational movement.
• the supporting plate can comprise a lower movement limiter formed at the bottom surface of the supporting plate extending into an upper recess of the coil block body formed in the upper surface of the coil block body.
• a lower movement limiter can reliably counteract an unwanted translation of the supporting plate in a plane substantially perpendicular to the aforementioned axis of rotation.
• a lower movement limiter can counteract an unwanted rotation in the aforementioned plane and also in a transverse plane to it.
• the one or more protrusions forming limiters can be formed in one piece with the supporting plate or the coil block body, in particular.
• the spring elements are formed as spring washers surrounding the associated rod.
• the spring washers are feasible in a cost-saving manner as elastic metal rings providing a predetermined flexibility int the coil block fixation system.
• the springs washers can also be referred to as disc springs.
• the coil block fixation system further comprises three or more rods and corresponding spring elements.
• the rods are coupled to the upper surface of the supporting plate for setting a load to the supporting plate towards the coil block body.
• the three or more spring elements are coupled to the associated rod such that each rod provides a respective load to the supporting plate with a respectively given flexibility along the mounting direction from the coil block body to the rods.
• the three rods realize a three-point-contact to the supporting plate and can beneficially affect the stability and flexibility of the coil block fixation system and the corresponding transformer.
• the three rods and the corresponding spring washers or spring element can provide equal or different local loads to the supporting plate. Different local loads can be realized by using different spring elements including different material or elastic properties and/or a different number of spring elements. This analogously applies to a configuration with two rods and associated spring elements.
• the coil block fixation system merely comprises one rod and at least one corresponding spring element coupled to the upper surface of the supporting plate for setting a load to the supporting plate towards the coil block body.
• the coil block fixation system merely comprises one rod and at least one corresponding spring element coupled to the upper surface of the supporting plate for setting a load to the supporting plate towards the coil block body.
• two, three or more rods are preferred.
• 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 extend 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 direction of the supporting plate.
• 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.
• the described coil block fixation system can contribute to an enhanced lifetime or service life, can allow for easy mounting and also passes several tough requirements including sine beat tests based on increasing amplitudes with fixed frequency requirements by a customer.
• the coil block fixation system passes mechanical resonance checks due to the counteracting damping set up by the described configurations.
• a further lateral movement limiter is formed by a protruding wall 15 at an inner edge of the coil block body 10.
• the protruding body wall 15 is adjacent to an inner edge of the supporting plate 1 and can reliably counteract an unwanted translation movement of the supporting plate towards the centre in x-direction.
• the protruding body wall 15 in contact with the adjacent edge of the supporting plate 1 counteracts an unwanted rotational movement.
• the protrusions and/or recesses of the supporting plate 1 and the coil block body 10 are designed such that the supporting plate 1 tightly fits into the coil block body 10.
• the coil block fixation system 30 further comprises two rods 3 that are coupled to the upper surface 21 of the supporting plate for setting a load to the supporting plate towards the coil block body.
• the rods 3 can be securely fixed to the supporting plate 1 by means of welding.
• the specific location of the rods 3 and their respective local load which sum up to a predetermined total load to the supporting plate 1 can be adapted to the intended use and application of the coil block fixation system 30 its implementation in or at an associated transformer.

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• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Housings And Mounting Of Transformers (AREA)
• Springs (AREA)

Priority Applications (2)

Applications Claiming Priority (1)

Publications (1)

Family

ID=89620772

Family Applications (1)

Country Status (2)

Citations (7)

• 2024
  • 2024-01-16 EP EP24382039.6A patent/EP4589611A1/fr active Pending
  • 2024-11-26 WO PCT/EP2024/083554 patent/WO2025153219A1/fr active Pending

Patent Citations (7)

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