Electric machine cooling system

A method for operation of an electric machine cooling system, comprising:

• spraying coolant towards stator endings from a plurality of nozzles in a pair of sealing rings that are included in a stator assembly;
• wherein the stator assembly includes:
• a stator core with multiple coolant passages axially extending therethrough;
• and
• multiple stator windings extending through the stator core and forming end windings at opposing axial sides of the stator core;
• and
• a pair of sealing rings directly coupled to opposing axial sides of the stator core;
• wherein each of the sealing rings in the pair of sealing rings includes:
• an outer seal positioned radially outward from an inner seal;
• and
• a sealed coolant channel formed between the inner seal and the outer seal and in fluidic communication with the multiple coolant passages;
• and
• the plurality of nozzles.

A traction motor cooling system, comprising:

• a stator assembly that includes:
• a stator core with multiple coolant passages axially extending therethrough;
• and
• multiple stator windings extending through the stator core and forming end windings at opposing axial sides of the stator core;
• and
• a pair of sealing rings directly coupled to opposing axial sides of the stator core;
• wherein each of the sealing rings in the pair of sealing rings forms a continuous structure and includes:
• an outer seal positioned radially outward from an inner seal;
• a sealed coolant channel formed between the inner seal and the outer seal and in fluidic communication with the multiple coolant passages;
• and
• a plurality of nozzles spraying coolant toward the end windings.