A hybrid-electric or all-electric powertrain may include a power control unit electrically coupled to an energy storage system. The power control unit may determine a power level command based at least in part on a power level request for the powertrain, and a power level-UCL and/or a power level-LCL. The power level-UCL and/or the power level-LCL may be based at least in part on an aggregate obverse power level request representing a requested power level for one or more obverse powertrains electrically coupled to the energy storage system. The power level commands may be limited by the power level-UCL and/or the power level-LCL. The power level-UCL may be set equal to either an available discharge power capacity or an apportionate discharge power capacity. The power level-LCL may be set equal to either an available storage power capacity or an apportionate storage power capacity.

A hybrid-electric or all-electric powertrain may include a power control unit electrically coupled to an energy storage system. The power control unit may determine a power level command based at least in part on a power level request for the powertrain, and a power level-UCL and/or a power level-LCL. The power level-UCL and/or the power level-LCL may be based at least in part on an aggregate obverse power level request representing a requested power level for one or more obverse powertrains electrically coupled to the energy storage system. The power level commands may be limited by the power level-UCL and/or the power level-LCL. The power level-UCL may be set equal to either an available discharge power capacity or an apportionate discharge power capacity. The power level-LCL may be set equal to either an available storage power capacity or an apportionate storage power capacity.

A rotor of a rotating electric machine includes a rotor core equipped with a cooling passage, a first retaining member disposed on one end side of the rotor core, and a second retaining member disposed on another end side of the rotor core. An inlet-side through hole of the first retaining member is inclined with respect to an axis of the rotor. An outlet-side through hole of the second retaining member is inclined with respect to the axis of the rotor. When the rotor is rotated, a cooling gas is introduced into the cooling passage through the inlet-side through hole, and the gas is discharged from the cooling passage through an outlet-side through hole.

The present disclosure is directed a cooling system. The cooling system includes a casing and at least two fins. The casing surrounds one or more electronic devices. The at least two fins extending from an exterior surface of the casing. Each of the at least two fins configured to direct an airflow to generate a high pressure zone and a low pressure zone. The casing includes a duct assembly that has a duct inlet and a duct outlet. The duct inlet is configured to be positioned in the high pressure zone and the duct outlet is configured to be positioned in the low pressure zone.

The present disclosure is directed a cooling system. The cooling system includes a casing and at least two fins. The casing surrounds one or more electronic devices. The at least two fins extending from an exterior surface of the casing. Each of the at least two fins configured to direct an airflow to generate a high pressure zone and a low pressure zone. The casing includes a duct assembly that has a duct inlet and a duct outlet. The duct inlet is configured to be positioned in the high pressure zone and the duct outlet is configured to be positioned in the low pressure zone.

An aircraft motor includes a front end cover, a rear end cover, a housing, a stator assembly, and a rotor assembly, where the stator assembly is fixedly connected in the housing in an insulated manner, one end of the rotor assembly is rotatably connected to the rear end cover in a supported manner, and the other end of the rotor assembly is rotatably connected to the front end cover; and the front end cover and the rear end cover are fixed to a front portion and a rear portion of the housing. The stator assembly includes a stator coil winding, an insulating varnish, and a structural adhesive, where the stator coil winding is a self-supporting stator coil winding, the insulating varnish is configured to achieve insulation of the stator coil winding, and the structural adhesive is configured for the stator coil winding to be formed into a fixed shape.

An aircraft powerplant assembly includes a cooling plate and an electric machine controller. The cooling plate includes a fluid cooling circuit internal to a body of the cooling plate. The fluid cooling circuit includes an inlet manifold, an outlet manifold and a plurality of heat exchange passages. Each of the heat exchange passages extends longitudinally along a longitudinal centerline from the inlet manifold to the outlet manifold. A first heat exchange passage is configured with a plurality of first cooling elements arranged longitudinally along its longitudinal centerline. The electric machine controller includes a controller housing and controller circuitry. The controller housing is removably attached to the cooling plate and overlaps the heat exchange passages. The controller circuitry is disposed within an interior of the controller housing. The controller circuitry is in thermal communication with the cooling plate through a wall of the controller housing.

An aircraft powerplant assembly includes a cooling plate and an electric machine controller. The cooling plate includes a fluid cooling circuit internal to a body of the cooling plate. The fluid cooling circuit includes an inlet manifold, an outlet manifold and a plurality of heat exchange passages. Each of the heat exchange passages extends longitudinally along a longitudinal centerline from the inlet manifold to the outlet manifold. A first heat exchange passage is configured with a plurality of first cooling elements arranged longitudinally along its longitudinal centerline. The electric machine controller includes a controller housing and controller circuitry. The controller housing is removably attached to the cooling plate and overlaps the heat exchange passages. The controller circuitry is disposed within an interior of the controller housing. The controller circuitry is in thermal communication with the cooling plate through a wall of the controller housing.

Provided are a stator, and a propeller driving device and an aircraft using the stator. The propeller driving device includes: a radial gap type BLDC motor with an inner rotor-outer stator structure where a rotor is placed in a circumferential shape with an air gap inside a stator; and a propeller installation bracket for mounting a propeller to a rotary shaft of the motor, wherein the stator includes: a stator core including an annular back yoke having a predetermined width to form a magnetic circuit and teeth extending from the back yoke in a central direction; an insulator formed to surround an outer circumferential surface on which a coil is wound in each tooth; and a stator coil wound around an outer circumferential surface of the insulator in each tooth. The insulator is formed of an insulating heat dissipation composite material having both heat dissipation performance and insulation performance.

Provided are a stator, and a propeller driving device and an aircraft using the stator. The propeller driving device includes: a radial gap type BLDC motor with an inner rotor-outer stator structure where a rotor is placed in a circumferential shape with an air gap inside a stator; and a propeller installation bracket for mounting a propeller to a rotary shaft of the motor, wherein the stator includes: a stator core including an annular back yoke having a predetermined width to form a magnetic circuit and teeth extending from the back yoke in a central direction; an insulator formed to surround an outer circumferential surface on which a coil is wound in each tooth; and a stator coil wound around an outer circumferential surface of the insulator in each tooth. The insulator is formed of an insulating heat dissipation composite material having both heat dissipation performance and insulation performance.