Rotor assembly and method of cooling

A rotor assembly comprising:

• a rotatable shaft having a rotational axis;
• a rotor core rotatably coupled to the rotatable shaft and defining at least one rotor post;
• and
• a winding support assembly fixed to the rotatable shaft, the winding support assembly including:
• a first winding support disc axially spaced from the rotor core, having an axially inward facing first side defining a first surface, and an axially outward facing second side defining a second surface,
• the first side including an annular first wall having a radially inward facing third surface defining a bore sized to receive the rotatable shaft therethrough, and a radially outward facing fourth surface opposingly spaced from the third surface,
• the first side further including a second wall and a third wall radially extending from the fourth surface and, axially extending from the first surface, and circumferentially spaced from each other,
• a fourth wall extending between the second wall and the third wall and radially opposingly spaced from the fourth surface;
• and
• a retaining ring circumscribing the first winding support disc, the retaining ring having an annular first leg circumscribing and radially spaced from the fourth wall.