Abstract: The present disclosure describes slot insulation systems for electrical rotating machines. For example, a system may include: a main insulation for a coil of the rotating machine or for an individual bar for the coil; a resin formulation serving as a slot adhesive forming a solid film. At room temperature and under standard conditions, the solid film is in an A-state. Heating the electrical rotating machine to a curing temperature for the resin formulation, the solid film firstly melts and flows within an occupied slot, then cures and solidifies to form a thermoset material.

Abstract: Various embodiments of the teachings herein include a conductor element of an electrical rotating machine. An example includes: a conductive core having a voltage rating greater than 700 volts; and a powder coating insulating the conductive core. The powder coating comprises two uncrosslinked plastics components comprising a solid at room temperature under standard conditions. A first uncrosslinked polyimide-containing plastics component and a second uncrosslinked epoxy-containing plastics component are present in the powder coating in a mixing ratio between 99:1 and 1:99.

Abstract: Various teachings of the present disclosure include a sub-conductor insulation with a prepreg including a solid insulation material in a prepreg matrix. The prepreg matrix includes solid insulation material in the form of layers, laminate layers, tapes, as paper and/or in the form of bound barrier material particles. The solid insulation material comprises at least partial discharge-resistant material. The prepreg matrix includes carbon compounds and up to 45 wt % of the total weight of the prepreg matrix of one or more silicon-containing components. The solid insulation material is embedded in the prepreg matrix and is wound in a precured B-stage as sub-conductor insulation.

Abstract: Various embodiments of the teachings herein include an insulation system. An example includes a polymer blend in the form of a solid two-dimensional insulation material, a material for wire insulation by means of extrusion and/or an injection-molded and/or compression-molded article. The blend is resistant to partial discharges and at least partly replaces any mica content in the insulation system. The blend comprises at least three blend partners including at least one copolymer based on polyetherimide and siloxane blended with at least two high-temperature thermoplastics. At least of one the high-temperature thermoplastics is in semicrystalline form, such that spherulites are detectable in the polymer blend.

Abstract: Various embodiments include a sprayable formulation for an insulation system of an electrical machine, the formulation comprising a sprayable resin mixture including: a monomeric and/or oligomeric, at least diepoxidic carbon-based first resin component; and a monomeric and/or oligomeric second resin component based on alkyl-/arylpolysiloxane with at least one glycidyl ester and/or glycidyl ether functionalities; and a curing agent and based on at least one of: anhydride, (poly)amine, and amino- and/or alkoxy-functional alkyl-/arylpolysiloxane.

Abstract: Various teachings of the present disclosure include a slot insulation system of an electrical rotating machine. For example, the system may include: a main insulation for a coil of the rotating machine or for an individual bar for the coil; a resin formulation serving as a slot adhesive forming a solid film. At room temperature and under standard conditions, the solid film is in the A-state. Heating the electrical rotating machine to a curing temperature for the resin formulation, the solid film firstly melts and flows within an occupied slot, then cures and solidifies to form a thermoset material.

Abstract: Various embodiments of the teachings herein include an insulation system. The system may include a solid insulation material including a two-dimensional insulant and a synthetic resin. The two-dimensional insulant includes a blend of a copolymer with a high-temperature thermoplastic. The synthetic resin includes a thermoset to impregnate the two-dimensional insulant and then cure the two-dimensional insulant.

Abstract: Various embodiments of the teachings herein include an insulation system suitable as main insulation of an electrical rotating machine of rated voltage greater than 700 volts. The insulation system may include a powder coating applied using a powder coating formulation with at least two components. A first component includes an uncrosslinked polymer component polyimide-containing polymer. A second component includes an uncrosslinked siloxane-containing polymer. The first component and the second component are each in solid form at room temperature under standard conditions.

Abstract: Various teachings of the present disclosure include a slot insulation system of an electrical rotating machine. For example, the system may include: a main insulation for a coil of the rotating machine or for an individual bar for the coil; a resin formulation serving as a slot adhesive forming a solid film. At room temperature and under standard conditions, the solid film is in the A-state. Heating the electrical rotating machine to a curing temperature for the resin formulation, the solid film firstly melts and flows within an occupied slot, then cures and solidifies to form a thermoset material.

Abstract: The invention relates generally to the field of insulating electrical conductors against partial discharge in the medium- and high-voltage ranges. In particular, the invention relates to an insulating system for an electric machine, in particular a rotating electric machine such as an electric motor and/or a generator. The invention provides for the first time a substitute for the conventionally used mica as a barrier material in an insulating system, such as the main insulation of rotating electric machines such as motors and/or generators. The substitute is based on a polyether-imide/siloxane copolymer, which can be processed two-dimensionally, for example by surface extrusion. In this way, sheets are produced and, after being processed in sheet form or as a laminate, can be used as planar insulating materials, or cut as strips, in insulating systems.

Abstract: Various embodiments include an insulation material for an electrical rotating machine comprising: a curable matrix material; a curing agent; and a filler embedded in the matrix material. The filler comprises electrically conductive doped metal oxide particles.

Abstract: Various embodiments include a sprayable formulation for production of a multilayer insulation for an electrical machine, especially a rotating electrical machine in the high-voltage or mid-voltage sector, for example a generator, transformer, which is subjected to higher rated voltages at operating voltages, i.e., for example, over and above 1 kV or more. The invention also relates to an electrical machine comprising such an insulation; the invention finally relates to a method of producing the multilayer insulation. This comprises spraying of various formulations with or without intermediate, especially metallic, interfaces and is automatable.

Abstract: Various embodiments include an impregnation formulation for a wrapping tape insulation of an electrical machine. The formulation comprises: a resin formulation with an epoxy base resin and a first component; and a hardener formulation with a hardener. The resin formulation reacts when combined with the hardener formulation to produce an insulation material. The first component includes a saturated and/or unsaturated epoxycycloalkyl group. A glass transition temperature of the insulation material is elevated compared to an impregnation formulation without the first component.

Abstract: Various embodiments include an electrical operating medium having an insulation system comprising a main insulation in the form of an encapsulation by an encapsulating compound. The encapsulating compound comprises the following components: a carbon-based resin component A; a silicon/oxygen-based resin component B; where the ratio of the components A:B is in the range between A=99:B=1 to A=60:B=40; 0.1% to 10% by weight of catalyst; 30% to 85% by weight of dielectric filler; and 0-60% by weight of a curing agent.

Abstract: Various embodiments include an insulation material and/or impregnation resin for a wrapping tape insulation, comprising: a base resin curing to a thermoset; and a curing agent. The base resin comprises a siloxane-containing compound forming a —SiR2—O— backbone in the thermoset.

Abstract: Various embodiments include a sprayable formulation for an insulation system of an electrical machine, the formulation comprising a sprayable resin mixture including: a monomeric and/or oligomeric, at least diepoxidic carbon-based first resin component; and a monomeric and/or oligomeric second resin component based on alkyl-/arylpolysiloxane with at least one glycidyl ester and/or glycidyl ether functionalities; and a curing agent and based on at least one of: anhydride, (poly)amine, and amino- and/or alkoxy-functional alkyl-/arylpolysiloxane.

Abstract: Various embodiments include a sprayable formulation for production of a multilayer insulation for an electrical machine, especially a rotating electrical machine in the high-voltage or mid-voltage sector, for example a generator, transformer, which is subjected to higher rated voltages at operating voltages, i.e., for example, over and above 1 kV or more. The invention also relates to an electrical machine comprising such an insulation; the invention finally relates to a method of producing the multilayer insulation. This comprises spraying of various formulations with or without intermediate, especially metallic, interfaces and is automatable.

Abstract: Various embodiments include an insulation material for an electrical rotating machine comprising: a curable matrix material; a curing agent; and a filler embedded in the matrix material. The filler comprises electrically conductive doped metal oxide particles.

Abstract: Various embodiments include an insulation material and/or impregnation resin for a wrapping tape insulation, comprising: a basis resin; a hardener; and a nanoparticle filler fraction. The basis resin comprises a polymer with at least a partial —SiR2-O— backbone, so a partial electric discharges results in an at least partial sintering of the nanoparticles to form a barrier layer.