# US 12,224,626 B2 · Rotor of a dynamo-electric rotary machine, dynamo-electric machine having a rotor, and method for producing the rotor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,224,626 B2 - Document ID: US12224626B2 - Status: Granted - Kind: B2 - Application number: 17/912,389 - Filed: 2021-02-17 - Published: 2023-05-11 - Granted: 2025-02-11 - Earliest claimed: 2020-03-18 - Assignees: Innomotics GmbH - Applicants: Innomotics GmbH; Valeo eAutomotive Germany GmbH - Inventors: Mario Büttner; Klaus Büttner; Klaus Kirchner; Matthias Warmuth - Web page: https://patentgrep.com/patent/US12224626B2 ## CPC - H02K 1/28: Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures - H02K 7/04: Balancing means - H02K 15/023: Cage rotors - H02K 15/165: Balancing the rotors - H02K 17/20: having deep-bar rotors - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract A rotor of a dynamo-electric rotary machine includes a rotor core arranged concentrically to a rotor axis and including slots filled with electrically conductive material. A front ring is arranged at a front axial end of the slots and includes electrically conductive material, and a rear ring is arranged at a rear axial end of the slots and includes electrically conductive material. A rotor-core-distal surface of the front ring and/or rear ring has a bevel in axial direction from an outer circumference to an inner circumference, with the bevel defined by a bevel angle having a value of 3° to 30°. A support element is at least partially connected to the front and/or rear ring with a positive fit and pressed thereon axially, with the support element being supported on a shaft and having a radial end which terminates at a radial end of the front and/or rear ring. ## Claims ### Claim 1 A rotor of a dynamo-electric rotary machine, said rotor comprising: a rotor core arranged in concentric relation to a rotor axis and including slots which are filled with electrically conductive material; a front short-circuiting ring arranged in concentric relation to the rotor axis at a front axial end of the slots and comprising electrically conductive material; a rear short-circuiting ring arranged in concentric relation to the rotor axis at a rear axial end of the slots and comprising electrically conductive material, wherein at least one member selected from the group consisting of the front short-circuiting ring and the rear short-circuiting ring includes a surface facing away from the rotor core and having at least partially a bevel in an axial direction from an outer circumference to an inner circumference of the member, with the bevel defined by a bevel angle having a value of 3° to 30°; and a support element at least partially connected to the surface of the member with a positive fit, said support element being pressed onto the member axially and supported on a shaft, said support element having a radial end which terminates at a radial end of the member. ### Claim 2 (depends on 1) The rotor of claim 1, wherein the support element has, at a surface facing toward the member, at least one section which has a bevel in the axial direction from an outer circumference to an inner circumference of the support element, with the bevel of the section defined by a bevel alternate angle which is an alternate angle to the bevel angle. ### Claim 3 (depends on 1) The rotor of claim 1, wherein the support element comprises a material having a tensile strength of 800 N/mm2 to 1200 N/mm2. ### Claim 4 (depends on 1) The rotor of claim 1, wherein the support element comprises steel. ### Claim 5 (depends on 3) The rotor of claim 3, wherein the support element is connectable to the shaft via an interference fit. ### Claim 6 (depends on 1) The rotor of claim 1, wherein the support element has at least one of recess and a thickening, for correcting an imbalance. ### Claim 7 (depends on 1) A dynamo-electric rotary machine, comprising a rotor as set forth in claim 1. ### Claim 8 A rotor of a dynamo-electric rotary machine, said rotor comprising: a rotor core arranged in concentric relation to a rotor axis and including slots which are filled with electrically conductive material; a front ring arranged in concentric relation to the rotor axis at a front axial end of the slots and comprising electrically conductive material; a rear ring arranged in concentric relation to the rotor axis at a rear axial end of the slots and comprising electrically conductive material, wherein at least one member selected from the group consisting of the front ring and the rear ring includes a surface facing away from the rotor core and having at least partially a bevel in an axial direction from an outer circumference to an inner circumference of the member with the bevel defined by a bevel angle having a value of 3° to 30°; and a support element designed to at least partially connect to the member with a positive fit, said support element being pressed onto the member axially and supported on a shaft, said support element having a radial end which terminates at a radial end of the member wherein the surface of the member includes a first region having a first part-bevel in the axial direction from the outer circumference to the inner circumference of the member, with the first part-bevel defined by a first part-bevel angle, and a second region having a second part-bevel in the axial direction from the outer circumference to the inner circumference of the member, with the second part-bevel defined by a second part-bevel angle which differs from the first part-bevel angle. ### Claim 9 (depends on 8) The rotor of claim 8, wherein the support element has a surface facing toward the member and including a first region having a bevel in the axial direction from the outer circumference to the inner circumference of the support element, with the bevel of the first region defined by a part-bevel alternate angle which is an alternate angle to the first part-bevel angle, and a second region having a bevel in the axial direction from the outer circumference to the inner circumference of the support element, with the bevel of the second region defined by a part-bevel alternate angle which is an alternate angle to the second part-bevel angle. ### Claim 10 A method for producing a rotor said method comprising: filling with electrically conductive material slots of a rotor core in concentric arrangement to a rotor axis; depositing electrically conductive material at a front end and a rear axial end of the slots to form a front ring and a rear ring using a shaping device such that at least one member selected from the group consisting of the front ring and the rear ring has a surface which faces away from the rotor core and which is at least partially given a bevel in an axial direction from an outer circumference to an inner circumference of the member with the bevel defined by a bevel angle having a value of 3° to 30°; pressing a support element axially onto the member with the support element being supported on a shaft and with a radial end of the support element terminating at a radial end of the member; and shaping the surface of the member with a first region having a first part-bevel in the axial direction from the outer circumference to the inner circumference of the member, with the first part-bevel defined by a first part-bevel angle, and a second region having a second part-bevel in the axial direction from the outer circumference to the inner circumference of the member, with the second part-bevel defined by a second part-bevel angle which differs from the first part-bevel angle. ### Claim 11 (depends on 10) The method of claim 10, further comprising shaping a member-facing surface of the support element with a first region having a bevel in the axial direction from the outer circumference to the inner circumference of the support element, with the bevel of the first region defined by a part-bevel alternate angle which is an alternate angle to the first part-bevel angle, and a second region having a bevel in the axial direction from the outer circumference to the inner circumference of the support element, with the bevel of the second region defined by a part-bevel alternate angle which is an alternate angle to the second part-bevel angle. ### Claim 12 A method for producing a rotor, said method comprising: filling with electrically conductive material slots of a rotor core in concentric arrangement to a rotor axis; depositing electrically conductive material at a front end and a rear axial end of the slots to form a front short-circuiting ring and a rear short-circuiting ring using a shaping device such that at least one member selected from the group consisting of the front short-circuiting ring and the rear short-circuiting ring has a surface which faces away from the rotor core and which is at least partially given a bevel in an axial direction from an outer circumference to an inner circumference of the member, with the bevel defined by a bevel angle having a value of 3° to 30°; and pressing a support element axially onto the surface of the member, with the support element being supported on a shaft and with a radial end of the support element terminating at a radial end of the member. ### Claim 13 (depends on 12) The method of claim 12, further comprising shrinking the support element onto the shaft. ### Claim 14 (depends on 13) The method of claim 13, further comprising heating the support element up to a temperature of 100° C. to 140° C., as the support element is shrunk onto the shaft. ### Claim 15 (depends on 12) The method of claim 12, wherein the support element is pressed onto the member in the axial direction. ### Claim 16 (depends on 12) The method of claim 12, wherein the support element is pressed onto the member with a bonding force of 20 to 40 t. ### Claim 17 (depends on 12) The method of claim 12, further comprising shaping the support element at a surface facing toward the member with at least one section which has a bevel in the axial direction from an outer circumference to an inner circumference of the support element, with the bevel of the section defined by a bevel alternate angle which is an alternate angle to the bevel angle. ### Claim 18 (depends on 12) The method of claim 12, further comprising connecting the support element to the shaft via an interference fit. ### Claim 19 (depends on 15) The method of claim 15, further comprising forming the support element with at least one of recess and a thickening for correcting an imbalance.