Abstract: A rotor and a dynamoelectric machine including a rotor are disclosed. In an embodiment, the rotor includes a rotor body having a plurality of axially extending slots disposed radially about the rotor body, and at least one coil having at least one turn positioned within each of the plurality of axially extending slots. The rotor further includes a plurality of subslots disposed in the rotor body such that each subslot extends axially through the rotor body parallel to an axis of rotation of the rotor body, and is in fluid communication with a radially inner end of a slot; a passageway extending substantially radially outwardly along each axially extending slot for cooling the at least one turn disposed in the slot; and a retaining member in each of the slots for retaining the at least one turn within the slot. Various embodiments provide ventilation via the passageway for cooling the rotor coils.

Abstract: Embodiments of the invention relate generally to electrical machines and, more particularly, to electrical machines containing a coil block assembly for cooling conductive coils. In one embodiment, the invention provides an electrical machine comprising: at least one tooth coil including: a stator tooth; and at least one conductive coil wound around the stator tooth, forming a plurality of coil turns; a coil block assembly between a first turn and a second turn of the plurality of coil turns, the coil block assembly including: at least two coil blocks, each coil block including a body and a face having at least one recess into the body, wherein the coil blocks are oriented with faces opposed, such that at least one cooling channel is formed by the at least one recess of each coil block.