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
  • H01F27/24—Magnetic cores
  • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
  • H01F27/266—Fastening or mounting the core on casing or support
• • 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
  • H01F27/24—Magnetic cores
  • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
  • H01F27/263—Fastening parts of the core together
• • 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
  • H01F27/288—Shielding
  • H01F27/2885—Shielding with shields or electrodes
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
  • H01F38/20—Instruments transformers
  • H01F38/22—Instruments transformers for single phase ac
  • H01F38/24—Voltage transformers
  • H01F38/26—Constructions

Definitions

• the invention relates to a voltage converter.
• an inductive voltage converter generally has at least one magnetic core arranged in a metallic encapsulating housing, around which a primary winding and (at least) one secondary winding run.
• the correct arrangement and adequate fixing of the active parts (magnetic cores with windings) of the voltage converter in the encapsulated housing are very important for reasons of the characteristics of the electrical high-voltage field, because an incorrect arrangement or insufficient fixing of the active parts can lead to damage or even total failure of the Voltage converter can lead.
• the invention is based on the object of specifying a voltage converter which is improved, in particular with regard to the positioning of its active parts and the number of components.
• the object is achieved by a voltage converter having the features of claim 1.
• a voltage converter according to the invention comprises at least one magnetic core with a winding limb, around which windings of the voltage converter are arranged, a base limb spaced apart from the winding limb and two side legs, which each connect the winding leg and the base leg to one another,
• a cover which has a positioning socket for each magnetic core, in which the magnetic core is positioned on the cover, and
• a holder with two spaced apart frame elements which run on opposite sides of the magnetic core along the two side legs and the base leg and are each connected to the cover.
• the cover closes, for example, an encapsulating housing of the voltage converter.
• the shape of the cover with a positioning socket for each magnetic core enables simple and precise positioning of each magnetic core without positioning gauges or similar aids.
• the mounting of a magnetic core with two frame elements enables a mechanical specific fixation of the magnetic core mounted on a positioning fixture between the two frame elements.
• the holder can also brace the magnetic core with the holder and develop electric fields. The invention thus simplifies the assembly of the voltage converter and can reduce the number of components of the voltage converter for fixing and bracing the active parts and for the formation of electrical fields in a desired way.
• the holder has clamping elements for each magnetic core, by means of which the magnetic core is clamped to the holder.
• the clamping elements of the holder of each magnetic core comprise two Klemmele elements and a clamping rod connecting the two clamping elements, each clamping element is positively connected between adjacent ends of the two frame elements of the holder angeord net and the tension rod runs along the winding's angle of the magnetic core.
• each clamping element of the holder of a magnetic core is net angeord at a transition area between a side leg and the winding leg of the magnetic core.
• the transition area has, for example, a curved surface against which the clamping element rests.
• the clamping elements for tensioning the magnet core can be pressed in a simple manner against the curved surface of the transition area by being moved along this surface on the tension rod.
• magnetic cores designed as cut tape cores have transition areas between the side legs and the winding legs with curved surfaces and are therefore particularly suitable for this embodiment of the invention.
• the clamping rod of the holder of each magnetic core has, for example, at least one end region guided by a clamping element with a thread onto which a screw element is screwed which presses the clamping element against the magnetic core.
• each frame element of the holder of each magnetic core has a screen with a surface facing the windings arranged around the magnetic core.
• the shielding runs, for example, on both sides of the windings arranged around the magnetic core, partially around the winding leg of the magnetic core and / or along both side legs and / or along the base leg.
• the holder of each magnetic core al so comprises shields arranged on the frame elements for shielding electrical fields, for example to avoid high field strengths at the edges of the frame elements. Thanks to the shields integrated in the frame elements, separate te or additional shielding are advantageously omitted or reduced.
• the base leg of the magnetic core is positively mounted on the positioning socket of each magnetic core.
• the base leg of each magnetic core is mounted in a positioning mount of the cover.
• each frame element is detachably connected to the cover, for example by at least one screw connection.
• the voltage converter has three magnetic cores.
• the winding legs of the magnet cores are arranged in a star shape at an angle of 120 degrees to one another. This enables in particular an expedient design of the voltage converter for three-phase alternating voltages.
• FIG. 1 shows a perspective illustration of a first exemplary embodiment from a voltage converter
• FIG. 2 shows a perspective view of the voltage converter shown in FIG. 1 in the area of a positioning detection
• FIG 3 shows a perspective illustration of a second exemplary embodiment from a voltage converter.
• FIG. 1 shows a perspective illustration of a first exemplary embodiment of a voltage converter 1.
• the voltage converter 1 is designed for single-phase alternating voltages.
• the voltage converter 1 comprises a cover 3, a primary winding 5, a secondary winding, an electrode 7, a magnetic core 9 and a holder 11 for the magnetic core 9.
• the cover 3 closes an encapsulation housing, not shown, in which the primary winding 5, the secondary winding, the electrode 7, the magnetic core 9 and the holder 11 are arranged.
• the magnetic core 9 comprises a winding limb 12 around which the primary winding 5 and the secondary winding are arranged, a base limb 13 spaced from the winding limb 12 and running parallel to the winding limb 12, and two side limbs 14, each of which is the winding limb 12 and the base limb 13 connect to one another and run perpendicular to the winding leg 12 and the base leg 13.
• the magnetic core 9 is designed as a cut tape core.
• the transition area 16 between a side leg 14 and the winding leg 12 and the transition area 17 between a side leg 14 and the base leg 13 each have a curved outer surface 19.
• the primary winding 5 runs around the secondary winding so that the secondary winding cannot be seen in FIG.
• One end of the primary winding 5 is with the Electrode 7 connected, which is arranged around a central portion of the primary winding 5 around.
• the cover 3 has a positioning socket 21 which is designed to position the magnetic core 9 on the cover 3. On the positioning socket 21 of the base leg 13 of the magnetic core 9 is mounted in a form-fitting manner.
• FIG. 2 shows a section of the voltage converter 1 shown in FIG. 1 in the area of the positioning socket 21 in a perspective illustration.
• the holder 11 comprises two frame elements 23, two clamping elements 25, a tension rod 27 and two screw elements 29.
• the frame elements 23 are arranged on opposite sides of the magnetic core 9 and each run along the two side legs 14 and the base leg 13.
• the frame elements 23 thus each have a substantially U-shaped shape.
• Each frame element 23 is releasably connected to the cover 3 by a screw connection 31 a related party.
• each frame element 23 has a shield 33 with a curved surface which faces the windings arranged around the magnet core 9 (primary winding 5, secondary winding).
• the shield 33 runs on both sides of the windings partially around the winding leg 12 and along both side legs 14 and the base leg 13, the shields 33 of the two frame elements 23 do not touch each other.
• the shields 33 of the two frame elements 23 in the area of the winding legs 12 are spaced apart on both sides of the windings by a gap 35, which prevents an electrical connection of the frame elements 23 in the core window in the electromagnetic near field of the windings.
• Each clamping element 25 is form-fitting between adjacent ends of the two frame elements 23 at a transition area 16 between a side leg 14 and the winding Leg 12 of the magnetic core 9 is arranged.
• the tension rod 27 connects the two clamping elements 25 together and ver runs along the winding leg 12.
• Each end region of the tension rod 27 is guided through a clamping element 33 and has a thread on which a screw element 29 is screwed, the clamping element 25 to the curved Upper surface 19 of the transition region 16 between a side leg 14 and the winding leg 12 presses.
• FIG. 3 shows a perspective illustration of a second exemplary embodiment of a voltage converter 1.
• the voltage converter 1 is designed for three-phase alternating voltages.
• the voltage converter 1 therefore has three magnetic cores 9, around each of which a primary winding 5 and a secondary winding are arranged.
• Each magnetic core 9 is designed like the magnetic core 9 of the voltage converter 1 shown in FIGS.
• the winding legs 12 of the magnetic cores 9 are arranged in a star shape at an angle of 120 degrees to one another.
• the base legs 13 of the magnetic cores 9 are each supported in a positively locking manner in a positioning mount 21 of a cover 3 of the voltage converter 1, analogously to the magnetic core 9 of the voltage converter 1 shown in FIGS.
• the voltage converter 1 has a holder 11 for each magnetic core 9, which is designed like the holder 11 of the magnetic core 9 of the voltage converter 1 shown in FIGS. 1 and 2 and is fastened to the cover 3 with a screw connection 31.

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Regulation Of General Use Transformers (AREA)
• Transformers For Measuring Instruments (AREA)
• Ultra Sonic Daignosis Equipment (AREA)
• Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
• Graft Or Block Polymers (AREA)
• Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
• Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=74175877

Family Applications (1)

Country Status (6)

Family Cites Families (8)

• 2020
  • 2020-01-30 DE DE102020201100.1A patent/DE102020201100A1/de active Pending
  • 2020-12-30 EP EP20839129.2A patent/EP4078631A1/de active Pending
  • 2020-12-30 WO PCT/EP2020/088028 patent/WO2021151614A1/de unknown
  • 2020-12-30 JP JP2022545155A patent/JP7439272B2/ja active Active
  • 2020-12-30 CN CN202080095301.0A patent/CN115151986A/zh active Pending
  • 2020-12-30 KR KR1020227029427A patent/KR20220129075A/ko not_active Application Discontinuation

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