EP4307322A1 - Fil rond isolé par un vernis, procédé de fabrication et utilisation correspondante - Google Patents
Fil rond isolé par un vernis, procédé de fabrication et utilisation correspondante Download PDFInfo
- Publication number
- EP4307322A1 EP4307322A1 EP22184696.7A EP22184696A EP4307322A1 EP 4307322 A1 EP4307322 A1 EP 4307322A1 EP 22184696 A EP22184696 A EP 22184696A EP 4307322 A1 EP4307322 A1 EP 4307322A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- wire
- round wire
- thermally unstable
- enamel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims description 10
- 210000003298 dental enamel Anatomy 0.000 claims abstract description 45
- 239000002966 varnish Substances 0.000 claims abstract description 44
- 238000005470 impregnation Methods 0.000 claims abstract description 41
- 229920005989 resin Polymers 0.000 claims abstract description 33
- 239000011347 resin Substances 0.000 claims abstract description 33
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 15
- 238000004804 winding Methods 0.000 claims description 15
- 238000009413 insulation Methods 0.000 claims description 12
- 230000001050 lubricating effect Effects 0.000 claims description 12
- -1 polyethylene Polymers 0.000 claims description 12
- 239000004698 Polyethylene Substances 0.000 claims description 9
- 239000004020 conductor Substances 0.000 claims description 8
- 229920001577 copolymer Polymers 0.000 claims description 8
- 229920000573 polyethylene Polymers 0.000 claims description 8
- 239000003973 paint Substances 0.000 claims description 7
- 239000004697 Polyetherimide Substances 0.000 claims description 6
- 229920002312 polyamide-imide Polymers 0.000 claims description 6
- 229920001601 polyetherimide Polymers 0.000 claims description 6
- 239000002202 Polyethylene glycol Substances 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 229920001223 polyethylene glycol Polymers 0.000 claims description 5
- 239000004962 Polyamide-imide Substances 0.000 claims description 4
- 239000004922 lacquer Substances 0.000 claims description 4
- 238000000354 decomposition reaction Methods 0.000 claims description 3
- 229920000098 polyolefin Polymers 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 238000007598 dipping method Methods 0.000 claims description 2
- 125000001153 fluoro group Chemical group F* 0.000 claims description 2
- 230000000379 polymerizing effect Effects 0.000 claims description 2
- 239000004593 Epoxy Substances 0.000 claims 1
- 230000005611 electricity Effects 0.000 claims 1
- 239000010410 layer Substances 0.000 abstract description 96
- 125000005373 siloxane group Chemical group [SiH2](O*)* 0.000 abstract description 7
- 229920000642 polymer Polymers 0.000 abstract description 6
- 239000012791 sliding layer Substances 0.000 abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 13
- 239000000126 substance Substances 0.000 description 9
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000001993 wax Substances 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 239000004721 Polyphenylene oxide Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- SNGREZUHAYWORS-UHFFFAOYSA-N perfluorooctanoic acid Chemical compound OC(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F SNGREZUHAYWORS-UHFFFAOYSA-N 0.000 description 2
- 229920000570 polyether Polymers 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229920005601 base polymer Polymers 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012170 montan wax Substances 0.000 description 1
- 125000000962 organic group Chemical group 0.000 description 1
- 150000003961 organosilicon compounds Chemical class 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003055 poly(ester-imide) Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920001709 polysilazane Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/065—Insulating conductors with lacquers or enamels
Definitions
- the invention relates to a enamel-insulated round wire, a method for producing a enamel-insulated round wire and the use of enamel-insulated round wires.
- a common example of an enameled round wire is a copper wire, i.e. a so-called enameled copper wire.
- An enameled copper wire is an insulated conductor that was covered with an electrically insulating layer of varnish during production. The thickness and weight of this paint insulation is very low compared to other insulation materials with the same effect.
- Enamelled copper wire is therefore preferred for the construction of electrical coils, transformers and machines.
- Other applications include solderable switching wires and the production of high-frequency strands.
- Electrical insulating varnishes are used to coat enamelled copper wires that are used as electrical conductors in electrical components such as coils, rotors and stators. To produce these electrical components, the coated and insulated round wire is wound using automated winding machines.
- the painted electrical wires on the edges of the electrical components should not be damaged and should fit easily into the grooves of the components so that a high packing density of the wire in the electrical components can be achieved. High packing densities are required to achieve optimal induction performance.
- a high packing density is also desirable because electrical machines such as electric motors that contain such electrical components are becoming more and more miniaturized because there is an increased demand for ever smaller devices and components.
- low-voltage motors are usually manufactured using wound round enameled wires, which are drawn into the stator laminated core after the winding process.
- a limiting factor is the copper filling in the groove, i.e. the number of wires, which can be inserted into the groove fully automatically using this technology.
- the enamelled copper wires are first wrapped around a template using a so-called flyer winder and then pulled into the groove in a bundle.
- the initially very ordered winding is no longer fixed, which can result in unfavorable structures - such as wire crossings.
- Such crossings additionally increase the effective cross section of the wire bundles, which further increases the required pulling force and thus the load on both the pulling machine and the winding.
- slippery waxes e.g. paraffins
- siloxane co-polymers are used as a coating according to the state of the art.
- the use of siloxane co-polymers in the top layer of wire enamel also results in a significant increase in lubricity.
- an electrical insulation system EIS of an electric motor which comprises electrical conductors in the form of round enamel wires with a round enamel wire winding arranged in a groove of a laminated core of a stator.
- the cavities between the windings of the conductors are filled with impregnation resin.
- the content of impregnation resin is determined by introducing a carrier containing impregnation resin into the conductor in order to sufficiently cast the cavities in the conductor of the laminated core.
- the impregnation resin wets the surface of the round wire varnish before it hardens.
- the wire enamel itself comprises a large number of individual plastic layers, for example made of polyethylene, "PE”, polyetherimide, “PEI”, polyamidimide “PAI”, polyimide “PI”, for example each layer being applied in a slidable manner on the layer below and/or above is to be flexible to mechanical stress, e.g. stretching, bending, etc.
- siloxane co-polymer technology - at least in the top wire enamel layer - it is possible to realize very high copper fillings fully automatically, but subsequent impregnation - for example of the filled groove - using impregnating resin, which includes, for example, polyetherimide, polyether and / or epoxy resin, not possible because the chemical surface groups that provide lubricity repel the impregnation resin.
- impregnating resin which includes, for example, polyetherimide, polyether and / or epoxy resin, not possible because the chemical surface groups that provide lubricity repel the impregnation resin.
- no chemical bond can be created between the non-polar functional groups - for example siloxane or fluorine groups, i.e. the anti-friction varnish surface on the one hand and the polar impregnation resin on the other.
- Impregnation of a round wire with high lubricity, produced by fluorine and/or siloxane groups on the surface, is therefore not yet possible.
- impregnation resins are regularly used in the grooves for low-voltage motors.
- the subject of the present invention is a lacquer-insulated round wire, comprising an electrical conductor which is insulated with wire lacquer and which surrounds the round wire in such a way that a layer of thermally unstable material is used as the top layer or as the penultimate layer directly adjacent to the surface the wire enamel insulation is provided.
- the invention also relates to the use of a lacquer-insulated round wire as described above and a layer of thermally unstable material thereon for the production of low-voltage electric motors.
- a lubricating varnish layer is applied over the thermally unstable layer, which becomes at least holey when the thermally unstable layer decomposes and/or is partially or completely removed in some places due to gas release from the decomposing lower thermally unstable layer.
- the anti-friction varnish layer can be provided over the entire surface or in part, whereby when partially coated with anti-friction varnish, it floats in areas like "ice floes" on the lower layer, especially when melting on the lower layer.
- the anti-friction varnish can make up a surface area, for example in the range from 40% to 100%, preferably 50% to 99%, in particular in the range from 55% to 95% of the surface of the wire enamel insulation.
- a lubricating varnish is chemically designed so that the base is thermally unstable, with lubricating properties being achieved on the surface by introducing, copolymerizing, mixing and/or blending the base polymer with lubricating components.
- Such lubricity components are, for example, paraffins, waxes, soaps, lubricants, solid lubricants, organic groups and compounds such as surfactants, organosilicon compounds, in particular siloxanes, polysiloxanes, silazanes, polysilazanes, boron nitride, fluorinated compounds such as perfluorooctanoic acid "PFOA”, polytetrafluoroethylene “PTFE” or “Teflon ® " and similar in the thermally unstable wire enamel insulation layers.
- PFOA perfluorooctanoic acid
- PTFE polytetrafluoroethylene
- Teflon ® fluorinated compounds
- the top wire enamel insulation layer is made of a thermally unstable material such as polyethylene so that it can be used after insertion in the groove when heated, this layer decomposes and exposes the underlying layers, which are, for example, part of a multi-layer wire enamel structure that is compatible with the impregnation resins.
- the thermally unstable layer comprises, for example, a compound selected from the group comprising: polyethylene, polyethylene glycol, polyolefin and/or polyolefin wax alone or in any combinations.
- the temperature stability can be influenced by varying the chain length of the polymer. Basically, the temperature stability is shifted to higher temperatures with longer chain lengths.
- the so-called current UV process is often used, whereby the stators are heated in advance by energizing the individual phases before being immersed in the liquid impregnation resin.
- the temperatures in the copper windings which are heated directly by the Joule effect, briefly reach 200°C to 300°C before the heat is distributed relatively homogeneously in the stator. It is therefore common practice to connect the stators and heat them, also to reduce the viscosity of the impregnation resin and to specifically bring about chemical gelling.
- wire enamels include several, for example in the range of 3 to 30, layers of different or identical polymers, e.g. polyetherimide, polyetherimine and/or polyamideimide, as well as any combinations or mixtures thereof. This is commonly referred to as the multi-layer wire enamel construction of the wire insulation enamel.
- impregnation resins based on polyurethane, saturated and particularly preferably unsaturated polyesterimide, polyamideimide, polyester and/or epoxy resin, as well as any combinations, mixtures, copolymers and/or blends thereof, combined, are used for the multilayer wire enamel structure.
- the number of layers varies, for example it is between 3 and 25 layers, preferably 7 to 20 layers, or 10 to 20 layers, particularly preferably for example 15 layers.
- the layers are preferably hardened separately from one another, so that sliding interfaces are created between them and no chemical bond occurs between the layers.
- the thermally unstable layer can also be applied as a top layer - slightly thicker than the other wire enamel layers.
- the layers of the multilayer wire enamel structure for the wire enamel insulation of round wires are in the range from 0.2 ⁇ m to 200 ⁇ m, in particular from 0.3 ⁇ m to 50 ⁇ m and particularly advantageously in the range between 0.5 to 20 ⁇ m .
- the thermally unstable layer is also applied, for example, as a prepreg based on polyethylene and/or polyethylene glycol.
- Figure 1 shows an overview of the state of the art, how enameled round wires are usually constructed and are present as an impregnated composite in a groove, for example of a low-voltage electric motor such as a traction motor.
- a composite 7 of round wires 1 insulated with wire enamel 2 and impregnated with impregnation resin 3 can be seen.
- a lubricating varnish layer 5 comprises, for example, a siloxane copolymer, whereby the lubricating varnish layer 5 receives a slippery surface 8, on which the impregnation resin 3 unfortunately rolls off .
- Figure 2 shows - based on this prior art - the solution according to the present invention using an exemplary embodiment.
- the multi-layer wire varnish structure 2 or 4 on the round wire 1 is used again.
- a thin anti-friction varnish layer 5 is applied as the top “last” layer.
- anti-friction coatings 5 are suitable for the relevant area of application.
- natural waxes, montan waxes, polyethylene waxes, and copolymers with propylene polymers are suitable from higher ⁇ -olefins, polypropylene oxides, esters from higher functional polyols and longer chain fatty acids.
- polytetrafluoroethylene dispersions such as those from the WO 2007/045575 are known, are suitable as a lubricating varnish for the lubricating varnish layer 5.
- lubricating varnish layers 5 with siloxane copolymer which are suitable as a lubricating varnish layer 5.
- the polymers contained in the paint are functionalized with components, for example the modification of polyamide imides with terminal longer-chain alkyl groups.
- thermally unstable layer 10 for example made of polyethylene glycol, as the "penultimate" layer.
- the thermally unstable layer 10 can also be made of another suitable polymer, which decomposes at higher temperatures, such as those that occur in the production of low-voltage motors with already filled stator slots, and - through, for example, gas evolution such as CO2 evolution - at least the upper layer partly blows off, as shown by arrow 11 in the Figure 2 shown.
- the core of the invention is to use the multi-layer structure of a wire enamel in order to use the top layer of anti-friction varnish for the process of pulling the enamel-insulated round wires into the stator groove of the motor and then - after filling the groove - to pass the anti-friction layer through the temperature input. "Bursting" of an underlying layer to such an extent that a surface that can be chemically bonded with the impregnation resin is exposed.
- Arrow 11 By heating, for example energizing, the winding already in the slot during the manufacture of the motor, a temperature input is created in the thermally unstable layer 10 and decomposes it.
- the decomposition usually releases CO2 in gaseous form and causes the overlying anti-friction varnish layer 5 to burst in many places, so that the material of the penultimate layer 10 comes to rest on the surface of the varnish insulation. See the illustration in the middle Figure 2 .
- Impregnation of the winding with impregnation resin 3 now encounters a surface which at least partially consists of a thermally unstable layer 10, which means that a good chemical bonding of the impregnation agent 3 to the thermally unstable layer 10 is possible at these points.
- the multilayer wire enamel structure 2, or 4 is exposed, via which a good chemical bond to the impregnation resin 3 is also possible.
- Figure 3 shows a further advantageous embodiment of the invention.
- the anti-friction varnish 9 is designed in such a way that, in addition to the anti-friction properties achieved by the siloxane groups it contains, it is a thermally unstable base material Material such as polyethylene and/or polyethylene glycol.
- the anti-friction varnish 9 When temperature is introduced - shown by arrow 11 - which occurs during the manufacture of an engine, the anti-friction varnish 9 on a thermally unstable material basis dissolves. Below the anti-friction varnish 9, the multi-layer wire varnish structure 4 is exposed, which - see arrow 12 - has a surface that can be easily bonded chemically to the impregnation resin 3 when impregnated with impregnating resin 3.
- the multi-layer structure can be used to at least break up the top anti-friction varnish layer without the often existing intermediate step with temperature input of current and / or Joule heating to 200 ° C or more, so that a subsequent impregnation with liquid impregnation resin can bind to the thermally unstable layer located under the top sliding layer.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Insulated Conductors (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP22184696.7A EP4307322A1 (fr) | 2022-07-13 | 2022-07-13 | Fil rond isolé par un vernis, procédé de fabrication et utilisation correspondante |
| PCT/EP2023/068150 WO2024012906A1 (fr) | 2022-07-13 | 2023-07-03 | Fil de section circulaire émaillé, son procédé de fabrication et son utilisation |
| EP23739163.6A EP4523231A1 (fr) | 2022-07-13 | 2023-07-03 | Fil de section circulaire émaillé, son procédé de fabrication et son utilisation |
| CN202380053135.1A CN119547162A (zh) | 2022-07-13 | 2023-07-03 | 漆包绝缘圆线、其制造方法及其用途 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP22184696.7A EP4307322A1 (fr) | 2022-07-13 | 2022-07-13 | Fil rond isolé par un vernis, procédé de fabrication et utilisation correspondante |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4307322A1 true EP4307322A1 (fr) | 2024-01-17 |
Family
ID=82595150
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22184696.7A Withdrawn EP4307322A1 (fr) | 2022-07-13 | 2022-07-13 | Fil rond isolé par un vernis, procédé de fabrication et utilisation correspondante |
| EP23739163.6A Pending EP4523231A1 (fr) | 2022-07-13 | 2023-07-03 | Fil de section circulaire émaillé, son procédé de fabrication et son utilisation |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23739163.6A Pending EP4523231A1 (fr) | 2022-07-13 | 2023-07-03 | Fil de section circulaire émaillé, son procédé de fabrication et son utilisation |
Country Status (3)
| Country | Link |
|---|---|
| EP (2) | EP4307322A1 (fr) |
| CN (1) | CN119547162A (fr) |
| WO (1) | WO2024012906A1 (fr) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0823120A1 (fr) * | 1995-04-26 | 1998-02-11 | Dr. Beck & Co. Aktiengesellschaft | Formulation de vernis pour fils metalliques a lubrifiant interne |
| WO2007045575A1 (fr) | 2005-10-21 | 2007-04-26 | Altana Electrical Insulation Gmbh | Lubrifiant pour fils laques |
| DE102010039168A1 (de) * | 2010-08-10 | 2012-02-16 | Schwering & Hasse Elektrodraht Gmbh | Elektroisolierlacke aus modifizierten Polymeren und daraus hergestellte elektrische Leiter mit verbesserter Gleitfähigkeit |
| EP3769403A1 (fr) | 2018-05-04 | 2021-01-27 | Siemens Aktiengesellschaft | Système d'isolation électrique d'un moteur électrique et procédé de fabrication correspondant |
-
2022
- 2022-07-13 EP EP22184696.7A patent/EP4307322A1/fr not_active Withdrawn
-
2023
- 2023-07-03 CN CN202380053135.1A patent/CN119547162A/zh active Pending
- 2023-07-03 EP EP23739163.6A patent/EP4523231A1/fr active Pending
- 2023-07-03 WO PCT/EP2023/068150 patent/WO2024012906A1/fr not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0823120A1 (fr) * | 1995-04-26 | 1998-02-11 | Dr. Beck & Co. Aktiengesellschaft | Formulation de vernis pour fils metalliques a lubrifiant interne |
| WO2007045575A1 (fr) | 2005-10-21 | 2007-04-26 | Altana Electrical Insulation Gmbh | Lubrifiant pour fils laques |
| DE102010039168A1 (de) * | 2010-08-10 | 2012-02-16 | Schwering & Hasse Elektrodraht Gmbh | Elektroisolierlacke aus modifizierten Polymeren und daraus hergestellte elektrische Leiter mit verbesserter Gleitfähigkeit |
| EP3769403A1 (fr) | 2018-05-04 | 2021-01-27 | Siemens Aktiengesellschaft | Système d'isolation électrique d'un moteur électrique et procédé de fabrication correspondant |
| US20210242760A1 (en) * | 2018-05-04 | 2021-08-05 | Siemens Aktiengesellschaft | Electric Insulation System of an Electric Motor, and Associated Manufacturing Process |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4523231A1 (fr) | 2025-03-19 |
| WO2024012906A1 (fr) | 2024-01-18 |
| CN119547162A (zh) | 2025-02-28 |
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Legal Events
| Date | Code | Title | Description |
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