Abstract: Cooled stators described herein include an inner body, an outer body disposed concentrically around the inner body and extending between the first end and the second end of the cooled stator, a plurality of stator poles extending radially between the inner body and the outer body and extending longitudinally along at least a portion of the inner body, at least one stator winding wound about each of the plurality of stator poles, a plenum chamber engaged with the inner body and the outer body to enclose the cooled stator at the second end, an inlet defined in each of the plurality of stator poles proximate the first end of the cooled stator, and at least one coolant passage extending longitudinally through each of the plurality of stator poles between the inlet and an outlet in fluid communication with the plenum chamber.

Abstract: Composite rotors provided herein include a rotor body extending along a longitudinal axis including a first component extending longitudinally along at least a portion of the rotor body and a second component extending longitudinally along at least a portion of the rotor body, at least a portion of the second component disposed concentrically around the first component, wherein the first component and the second component together define an internal region, wherein a radial thickness of the first component and a radial thickness of the second component vary along the longitudinal axis. The composite rotor also includes at least one magnet disposed on an inner surface of at least one of the first component or the second component within the internal region.

Abstract: Rotor hubs described herein include a frustoconical body having a base, a frustum, and a longitudinal axis extending therebetween, and a plurality of elongated protrusions spaced about a circumference of the base and extending from the base parallel to the longitudinal axis.

Abstract: Composite rotors provided herein include a rotor body extending along a longitudinal axis including a first component extending longitudinally along at least a portion of the rotor body and a second component extending longitudinally along at least a portion of the rotor body, at least a portion of the second component disposed concentrically around the first component, wherein the first component and the second component together define an internal region, wherein a radial thickness of the first component and a radial thickness of the second component vary along the longitudinal axis. The composite rotor also includes at least one magnet disposed on an inner surface of at least one of the first component or the second component within the internal region.

Abstract: Rotor hubs described herein include a frustoconical body having a base, a frustum, and a longitudinal axis extending therebetween, and a plurality of elongated protrusions spaced about a circumference of the base and extending from the base parallel to the longitudinal axis.

Abstract: Cooled stators described herein include an inner body, an outer body disposed concentrically around the inner body and extending between the first end and the second end of the cooled stator, a plurality of stator poles extending radially between the inner body and the outer body and extending longitudinally along at least a portion of the inner body, at least one stator winding wound about each of the plurality of stator poles, a plenum chamber engaged with the inner body and the outer body to enclose the cooled stator at the second end, an inlet defined in each of the plurality of stator poles proximate the first end of the cooled stator, and at least one coolant passage extending longitudinally through each of the plurality of stator poles between the inlet and an outlet in fluid communication with the plenum chamber.