Rotor having cooling channels, and electric machine having such a rotor
AssigneeSchaeffler Technologies AG & Co. KG
InventorsLucas Braun, Matthias Geiser
Life of this patent
Estimating the term…
Abstract
A rotor of an electric machine for a motor vehicle comprises a rotor body having a plurality of rotor magnets situated in magnet pockets. Each magnet is secured by means of a plastic body that extends in the magnet pockets. A plurality of axial cooling channels have outlet openings situated in the end face of the rotor body, from which a cooling fluid is discharged into the surroundings of the rotor whilst the rotor is in operation. A plastic body protrudes, axially out of the rotor body and interacts with one of the outlet openings such that cooling fluid that exits the outlet opening whilst the rotor is in operation is subjected to an axial force component by a fluid-guiding element of the plastic body.
Claims20
A rotor an electric machine of a motor vehicle, comprising:
- a rotor body having a plurality of magnet pockets extending axially through the rotor body, in each of which magnet pockets at least one rotor magnet is received, and a plurality of cooling channels that extend axially through the rotor body, each having an end-face outlet opening in the rotor body, the plurality of cooling channels being configured to have cooling fluid flow therethrough and discharge therefrom via the end-face outlet openings into the surroundings of the rotor in operation of the rotor;
- and
- at least one plastic body that extends into at least one of the plurality of magnet pockets to secure at least one rotor magnet therein, wherein the at least one plastic body includes a fluid-guiding element that extends axially away from the rotor body outside of the at least one magnet pocket and is configured to deflect cooling fluid discharged from a corresponding end-face outlet opening axially away from the rotor body in operation of the rotor.
(canceled)
An electric machine, comprising:
- a stator having a stator winding that is received therein and that exits axially from two end faces of the stator to form a winding head in each case;
- and
- a rotor rotatably arranged in the stator, the rotor comprising:
- a rotor body having a plurality of magnet pockets extending axially therethrough and a plurality of cooling channels that extend axially therethrough, wherein each of the plurality of cooling channels has an end-face outlet opening in the rotor body and is configured to have cooling fluid flow therethrough and discharge therefrom via the end-face outlet opening into the surroundings of the rotor in operation of the rotor;
- and
- at least one plastic body that extends into at least one of the plurality of magnet pockets to secure at least one rotor magnet therein, wherein the at least one plastic body includes a fluid-guiding element that extends axially away from the rotor body outside of the at least one magnet pocket and is configured to deflect cooling fluid discharged from a corresponding end-face outlet opening axially away from the rotor body to at least one of the winding heads in operation of the electric machine.
A rotor of an electric machine, comprising:
- a rotor body that includes a plurality of magnet pockets that extend axially through the rotor body, including a first magnet pocket and a second magnet pocket that is circumferentially adjacent to the first magnet pocket, and a plurality of cooling channels that extend axially through the rotor body, including a first cooling channel that has an outlet opening that is positioned circumferentially between the first and second magnet pockets, wherein the first cooling channel is configured to convey cooling fluid therein that is discharged via the outlet opening of the first cooling channel into the surroundings of the rotor in operation of the electric machine;
- and
- a plastic body having a first portion that extends within the first magnet pocket, a second portion that extends within the second magnet pocket, and a third portion that extends between the first and second portions of the plastic body outside of the first and second magnet pockets, wherein the third portion includes a ramp having a ramp surface that is circumferentially aligned with the outlet opening of the first cooling channel, that is radially-outboard of the outlet opening of the first cooling channel, and that angles radially outboard and axially away from the rotor body, wherein the ramp surface is configured to deflect cooling fluid discharged from the outlet opening of the first cooling channel axially away from the rotor body.
Dependencies are inferred from the claim text.