# US 2020/0403473 A1 · Electric machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0403473 A1 - Document ID: US20200403473A1 - Status: Published application - Kind: A1 - Application number: 16/445,906 - Filed: 2019-06-19 - Published: 2020-12-24 - Earliest claimed: 2019-06-19 - Assignees: Ford Global Technologies, LLC - Applicants: Ford Global Technologies, LLC - Inventors: Michael W. Degner; Myung Ki Sung; Prasad Dev Hanumalagutti; Edward Chan-Jiun Jih - Web page: https://patentgrep.com/patent/US20200403473A1 ## CPC - H02K 3/24: with channels or ducts for cooling medium between the conductors - B60K 1/00: Arrangement or mounting of electrical propulsion units (B60K7/00 takes precedence; arrangement or mounting of plural diverse prime-movers for mutual or common propulsion B60K6/00) - B60K 6/26: characterised by the motors or the generators - B60K 6/387: Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means - B60K 6/48: Parallel type - B60K 6/547: the transmission being a stepped gearing - H02K 1/32: with channels or ducts for flow of cooling medium - H02K 7/006: {Structural association of a motor or generator with the drive train of a motor vehicle} - H02K 9/19: for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil - B60K 2001/001: {one motor mounted on a propulsion axle for rotating right and left wheels of this axle} - B60K 2001/006: {the electric motors} - B60K 2006/4825: {Electric machine connected or connectable to gearbox input shaft} - B60Y 2200/91: Electric vehicles - B60Y 2200/92: Hybrid vehicles - B60Y 2306/05: Cooling - B60Y 2400/60: Electric Machines, e.g. motors or generators - H02K 2213/03: Machines characterised by numerical values, ranges, mathematical expressions or similar information - Y02T 10/62: Hybrid vehicles - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES - B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract An electric machine configured to propel a vehicle includes a stator, a rotor, and an end plate. The stator has end windings that protrude axially therefrom. The rotor is disposed within the stator. The end plate is secured to an axial end of the rotor. The end plate defines a primary chamber, a secondary chamber that is radially outward of the primary chamber, and a first outlet channel that is configured to direct fluid onto the end windings. The primary chamber is in fluid communication with a fluid source and the secondary chamber. The secondary chamber is in fluid communication with the outlet channel. ## Claims ### Claim 1 An electric machine configured to propel a vehicle comprising: a stator extending in an axial direction between opposing stator ends, having end windings protruding from each stator end, and defining a central opening; a rotor disposed within the central opening and extending in the axial direction between opposing rotor ends; and an end plate secured to a first of the rotor ends, the end plate defining a primary chamber, a plurality of secondary chambers that are each radially outward of the primary chamber, and a plurality of outlet channels that are configured to direct fluid onto the end windings, wherein the primary chamber is in fluid communication with a fluid source and each of the plurality of secondary chambers, and wherein each of the plurality of secondary chambers are in fluid communication with at least one of the outlet channels of the plurality of outlet channels. ### Claim 2 (depends on 1) The electric machine of claim 1 further comprising flow restrictors disposed between the secondary chambers and the outlet channels, wherein the flow restrictors are configured to increase a fluid pressure within the secondary chambers. ### Claim 3 (depends on 1) The electric machine of claim 1 further comprising a rotatable shaft that defines fluid delivery channels, wherein the rotor and end plate are secured to the shaft and the fluid delivery channels establish fluid communication between the fluid source and the primary chamber. ### Claim 4 (depends on 1) The electric machine of claim 1 further comprising protrusions that extend into the outlet channels that are configured to produce turbulence into a fluid flowing through the outlet channels. ### Claim 5 (depends on 1) The electric machine of claim 1 further comprising a second end plate secured to a second of the rotor ends, the second end second plate defining a tertiary chamber, a plurality of quaternary chambers that are each radially outward of the tertiary chamber, and a second plurality of outlet channels that are configured to direct fluid onto the stator ends, wherein the tertiary chamber is in fluid communication with the fluid source and the second plurality of quaternary chambers, and wherein each of the plurality of quaternary chambers are in fluid communication with at least one of the outlet channels of the second plurality of outlet channels. ### Claim 6 (depends on 5) The electric machine of claim 5 further comprising flow restrictors disposed between the plurality of quaternary chambers and the outlet channels of the second plurality of outlet channels, wherein the flow restrictors are configured to increase a fluid pressure within the plurality of quaternary chambers. ### Claim 7 (depends on 5) The electric machine of claim 5 further comprising a rotatable shaft that defines fluid delivery channels, wherein the rotor and second end plate are secured to the shaft and the fluid delivery channels establish fluid communication between the fluid source and the tertiary chamber. ### Claim 8 (depends on 5) The electric machine of claim 5 further comprising protrusions that extend into at least one of the outlet channels of the second plurality of outlet channels that are configured to produce turbulence into a fluid owing through the outlet channels. ### Claim 9 An electric machine configured to propel a vehicle comprising: a stator having end windings protruding axially therefrom; a rotor disposed within the stator; and an end plate secured to an axial end of the rotor, the end plate defining a primary chamber, a secondary chamber that is radially outward of the primary chamber, and a first outlet channel that is configured to direct fluid onto the end windings, wherein the primary chamber is in fluid communication with a fluid source and the secondary chamber, and wherein the secondary chamber is in fluid communication with the first outlet channel. ### Claim 10 (depends on 9) The electric machine of claim 9 further comprising a flow restrictor disposed between the secondary chamber and the first outlet channel, wherein the flow restrictor is configured to increase a fluid pressure within the secondary chamber. ### Claim 11 (depends on 9) The electric machine of claim 9 further comprising a rotatable shaft that defines fluid delivery channels, wherein the rotor and end plate are secured to the shaft and the fluid delivery channels establish fluid communication between the fluid source and the primary chamber. ### Claim 12 (depends on 9) The electric machine of claim 9 further comprising protrusions that extend into the first outlet channel that are configured to produce turbulence into a fluid flowing through the first outlet channel to generate coolant droplets from the fluid, which increases the coverage area of the fluid. ### Claim 13 (depends on 9) The electric machine of claim 9, wherein the end plate defines a second outlet channel that is in fluid communication with the secondary chamber and is configured to direct fluid onto the end windings. ### Claim 14 (depends on 13) The electric machine of claim 13, wherein the second outlet channel is oriented at an angle relative to the first outlet channel that ranges between 0° and 45°. ### Claim 15 (depends on 13) The electric machine of claim 13, wherein the end plate defines a third outlet channel that is in fluid communication with the secondary chamber and is configured to direct fluid onto the end windings. ### Claim 16 (depends on 15) The electric machine of claim 15, wherein the third outlet channel is oriented at an angle relative to the first outlet channel that ranges between 0° and 45°. ### Claim 17 (depends on 9) The electric machine of claim 9, wherein the first outlet channel extends between the primary channel and outer peripheral surface of the end plate. ### Claim 18 A vehicle comprising: an electric machine configured to propel the vehicle, the electric machine comprising, a stator having end windings, a rotor, and an end plate secured to an end of the rotor, the end plate defining a primary chamber, a secondary chamber that is radially outward of the primary chamber, and an outlet channel that is configured to direct fluid onto the end windings, wherein the primary chamber is in fluid communication with a transmission pump and the secondary chamber, and wherein the secondary chamber is in fluid communication with the outlet channel. ### Claim 19 (depends on 18) The vehicle of claim 18 further comprising a flow restrictor disposed between the secondary chamber and the outlet channel, wherein the flow restrictor is configured to increase a fluid pressure within the secondary chamber. ### Claim 20 (depends on 18) The vehicle of claim 18 further comprising protrusions that extend into the outlet channels that are configured to produce turbulence into a fluid towing through the outlet channels.