# US 2021/0242729 A1 · Rotating electrical machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0242729 A1 - Document ID: US20210242729A1 - Status: Published application - Kind: A1 - Application number: 16/948,974 - Filed: 2020-10-08 - Published: 2021-08-05 - Earliest claimed: 2020-02-05 - Assignees: Toyota Jidosha Kabushiki Kaisha - Applicants: Toyota Jidosha Kabushiki Kaisha - Inventors: Kenta TABUCHI; Takashi MATSUMOTO - Web page: https://patentgrep.com/patent/US20210242729A1 ## CPC - H02K 1/165: {Shape, form or location of the slots} - H02K 1/20: with channels or ducts for flow of cooling medium - H02K 1/2766: {having a flux concentration effect} - H02K 1/32: with channels or ducts for flow of cooling medium - H02K 3/345: {between conductor and core, e.g. slot insulation} - Y02T 10/64: Electric machine technologies in electromobility - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A rotating electrical machine includes a rotor, a stator core, coils, and insulating sheets. A discharge port that discharges coolant is provided on an outer circumferential face of the rotor. The stator core includes an annular or cylindrical yoke, and teeth disposed on an inner circumferential face of the yoke in a circumferential direction with spaces. The stator core is disposed encompassing an outer circumference of the rotor. A slot-wall-face channel is provided on a wall face of the stator core defining a slot, and configured to open as to the slot for the coolant to flow through. The coils are wound on the teeth. The insulating sheet is disposed in the slot and interposed between the stator core and the coil, and is configured with at least part of the slot-wall-face channel open as to the coil. ## Claims ### Claim 1 A rotating electrical machine, comprising: a rotor on which a discharge port that discharges coolant is provided on an outer circumferential face; a stator core including an annular or cylindrical yoke, and teeth arranged on an inner circumferential face of the yoke in a circumferential direction with spaces, the stator core being disposed encompassing an outer circumference of the rotor, with a slot-wall-face channel being provided on a wall face of the stator core defining a slot disposed between the teeth that are adjacent in the circumferential direction, the slot-wall-face channel being configured to open as to the slot for the coolant to flow through; coils wound on the teeth; and an insulating sheet disposed in the slot and interposed between the stator core and the coil, the insulating sheet being configured with at least part of the slot-wall-face channel open as to the coil. ### Claim 2 (depends on 1) The rotating electrical machine according to claim 1, wherein: each of the teeth includes a first main portion, a second main portion and a small portion; and the small portion is interposed between the first main portion and the second main portion in an axial direction, a width of the small portion being smaller than widths of the first main portion and the second main portion, and a length of the small portion in a radial direction of the stator core being shorter than lengths of the first main portion and the second main portion in the radial direction of the stator core. ### Claim 3 (depends on 1) The rotating electrical machine according to claim 1, wherein the insulating sheet is disposed over an entire length in an axial direction of the slot in which the insulating sheet is disposed. ### Claim 4 (depends on 3) The rotating electrical machine according to claim 3, wherein: the slot-wall-face channel includes a side-face channel that is provided on a side face of at least one of the teeth defining the slot and extends in a radial direction; and a notch or an opening is provided to at least a part of the insulating sheet at a portion facing the side-face channel. ### Claim 5 (depends on 3) The rotating electrical machine according to claim 3, wherein: the slot-wall-face channel includes a side-face channel and a bottom-face channel; the side-face channel is provided on a side face of at least one of the teeth defining the slot and extends in a radial direction; the bottom-face channel is provided on the inner circumferential face of the yoke defining the slot and connects to the side-face channel; and an opening is provided to at least a part of the insulating sheet at a portion facing the bottom-face channel. ### Claim 6 (depends on 1) The rotating electrical machine according to claim 1, wherein the insulating sheet includes a cover portion disposed at a portion where the slot is open as to the rotor so as to cover the coil in the slot, and a notch or an opening is provided to a part of the cover portion. ### Claim 7 (depends on 1) The rotating electrical machine according to claim 1, wherein the discharge port and the slot-wall-face channel are disposed at a same position in an axial direction. ### Claim 8 (depends on 1) The rotating electrical machine according to claim 1, wherein the insulating sheet is divided with a gap at a position of the slot-wall-face channel.