# US 2021/0242760 A1 · Electric Insulation System of an Electric Motor, and Associated Manufacturing Process > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0242760 A1 - Document ID: US20210242760A1 - Status: Published application - Kind: A1 - Application number: 17/052,786 - Filed: 2019-05-03 - Published: 2021-08-05 - Earliest claimed: 2018-05-04 - Assignees: Siemens Aktiengesellschaft - Applicants: Siemens Aktiengesellschaft - Inventors: Tobias Katzenberger; Bastian Plochmann - Web page: https://patentgrep.com/patent/US20210242760A1 ## CPC - H02K 15/12: Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines - B29C 70/72: Encapsulating inserts having non-encapsulated projections, e.g. extremities or terminal portions of electrical components {(B29C70/742 takes precedence)} - H02K 3/30: Windings characterised by the insulating material - H02K 3/34: between conductors or between conductor and core, e.g. slot insulation - H02K 15/105: {to the windings} - B29K 2101/10: Thermosetting resins - B29K 2105/12: of short lengths, e.g. chopped filaments, staple fibres or bristles - B29L 2031/7498: {Rotors (with blades B29L2031/08)} - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS - B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES ## Abstract Various embodiments of the teachings herein include an electric insulation system of an electric motor comprising a conductor with a wire winding in a slot of a laminated core of a stator of the electric motor. Wires in the conductor are potted by impregnating resin on and in a carrier. The carrier is loaded with impregnating resin and is arranged between the winding wires in the conductor. Cavities of the conductor are filled with the impregnating resin. The impregnating resin provides potting for the cavities in the conductor of the laminated core. ## Claims ### Claim 1 An electric insulation system of an electric motor, the system comprising: a conductor with a wire winding in a slot of a laminated core of a stator of the electric motor; wherein wires in the conductor are potted by impregnating resin on and in a carrier; wherein the carrier is loaded with impregnating resin and is arranged between the winding wires in the conductor; wherein cavities of the conductor are filled with the impregnating resin; wherein the impregnating resin provides potting for the cavities in the conductor of the laminated core. ### Claim 2 (depends on 1) The insulation system as claimed in claim 1, wherein the carrier comprises prepreg fibers. ### Claim 3 (depends on 2) The insulation system as claimed in claim 2, wherein the prepreg fibers comprise intermingled fibrils. ### Claim 4 (depends on 2) The insulation system as claimed in claim 2, wherein the prepreg fibers comprise plastic fibers. ### Claim 5 (depends on 2) The insulation system as claimed in claim 2, wherein the prepreg fibers comprise glass fibers. ### Claim 6 (depends on 2) The insulation system as claimed in claim 2, wherein the prepreg fibers comprise felts. ### Claim 7 (depends on 2) The insulation system as claimed in claim 2, wherein the prepreg fibers are dimensionally matched. ### Claim 8 (depends on 2) The insulation system as claimed in claim 2, wherein the prepreg fibers comprise a mixture of fibers of different lengths. ### Claim 9 (depends on 2) The insulation system as claimed in claim 2, wherein the prepreg fibers comprise a mixture of fibers of different materials. ### Claim 10 (depends on 1) The insulation system as claimed in claim 1, wherein up to 35% by vol of impregnating resin and carrier are present in the conductor. ### Claim 11 (depends on 2) The insulation system as claimed in claim 2, wherein the conductor comprises volume fractions of prepreg carrier to winding wire at maximum 5% by vol of prepreg fiber to 1% by vol of winding wire. ### Claim 12 An electric insulation system of an electric motor, the system comprising: a wire winding as conductor in slots of a laminated core wherein the wire winding and a carrier in the conductor are embedded in a potting compound; wherein the potting compound in the conductor is distributed uniformly around the wires and the carrier because the impregnating resin for this purpose is not guided into the conductor from the outside, but rather by means of the carriers which are loaded with impregnating resin in the B state and which remain with the winding wires in the winding. ### Claim 13 A method for manufacturing an electric insulation system of an electric motor, the method comprising: winding a conductor including winding wire and impregnating resin carriers; drawing the conductor into slots of a laminated core of a stator of the electric motor; and curing the impregnated winding wire/carrier insulation. ### Claim 14 (depends on 13) The process as claimed in claim 13, further comprising, between the drawing-in of the conductor and the curing, heating up the stator to a temperature at which the prepreg impregnating resin in and on the impregnating resin carrier melts and is uniformly distributed into the adjacent intermediate spaces of the individual winding wires in the slot. ### Claim 15 (depends on 13) The process as claimed in claim 13, wherein the impregnating resin is uniformly distributed between the winding wires of the conductor and within the slot at least partially via capillary forces.