Abstract:
A permanent magnet rotor core includes a plurality of rotor poles circumferentially-spaced about a central axis and including a first rotor pole and an adjacent second rotor pole that each include an outer wall, and wherein the rotor core includes a rotor diameter. The rotor core also includes a plurality of radial apertures alternately-spaced with the plurality of rotor poles. The rotor core also includes a first protrusion extending from the first rotor pole into a first radial aperture of the plurality of radial apertures positioned between the first rotor pole and the second rotor pole. The rotor core further includes a second protrusion extending from the second rotor pole into the first radial aperture such that a circumferential opening is defined between the first protrusion and the second protrusion. The opening extends a first length of between approximately 0.052% and approximately 0.058% of the rotor diameter.
Abstract:
A stator assembly for use in an axial flux electric motor includes at least one tooth tip and at least one stator tooth coupled to the at least one tooth tip, wherein the at least one stator tooth includes an insertable portion. The stator assembly also includes at least one stator base including at least one receiving slot configured to receive the insertable portion to form a mechanical joint between the at least one stator base and the at least one stator tooth.
Abstract:
An electric motor assembly includes a bearing assembly including a rotating component and at least one stationary component. The electric motor assembly also includes an impeller coupled to the rotating component. The impeller includes an inlet and an outlet and is configured to direct a fluid between the inlet and the outlet. The electric motor assembly also includes a rotor assembly directly coupled to the impeller. A fluid flow channel is defined between the rotating component and the at least one stationary component. The flow channel includes a first end proximate the impeller outlet and a second end proximate the impeller inlet.
Abstract:
A hydrodynamic bearing assembly includes a first member including a first engaging surface. The first member is stationary in a non-operating mode of the bearing assembly and rotates about an axis in an operational mode of the bearing assembly. The first member includes a first bore and a shaft positioned within the first bore and including an end surface. The hydrodynamic bearing assembly also includes a second member including a second bore and a second engaging surface positioned adjacent the first engaging surface. The second member is stationary in both the non-operating mode and the operational mode of the bearing assembly. The hydrodynamic bearing assembly further includes a spacer member positioned within the second bore and is configured to engage the first member to define a first gap between the first engaging surface and the second engaging surface in the non-operational mode.
Abstract:
A hydrodynamic bearing assembly includes a first member including a first engaging surface. The first member is stationary in a non-operating mode of the bearing assembly and rotates about an axis in an operational mode of the bearing assembly. The hydrodynamic bearing assembly also includes a second member including a bore and a second engaging surface positioned adjacent the first engaging surface. The second member is stationary in both the non-operating mode and the operational mode of the bearing assembly. The hydrodynamic bearing assembly further includes a spacer member positioned within the bore and is configured to engage the first member to define a first gap between the first engaging surface and the second engaging surface in the non-operational mode.
Abstract:
A hydrodynamic bearing assembly includes a first stationary component, a shaft coupled to the first stationary component, and a second stationary component coupled to the shaft opposite the first stationary component. The hydrodynamic bearing assembly also includes a rotating component coupled to the shaft between the first stationary component and the second stationary component. The rotating component includes a first end surface including a first diameter and an opposing second end surface including a second diameter that is greater than the first diameter.
Abstract:
An axial flux electric machine comprises a rotor assembly configured to rotate about an axis of rotation. A stator core is coupled to the rotor assembly. The stator core comprises a stator core base and a plurality of circumferentially-spaced stator teeth extending from the base in a direction parallel to the axis. Each stator tooth of the plurality of stator teeth comprises a top surface, a pair of opposing circumferential sides, and a chamfered portion defined at an intersection of the top surface and each of the pair of opposing sides. The chamfered portion facilitates reducing an amount of torque ripple produced by the axial flux electric motor.
Abstract:
An electric machine includes a housing having an air intake, an air outlet, and defining an air passage therein. The air passage includes a first channel extending from the air intake in a radial direction and a second channel extending in the radial direction to the outlet. The electric machine further includes a motor assembly positioned within the housing that includes a shaft that rotates about a rotational axis that is generally perpendicular to the radial direction. The electric machine further includes an electronics assembly within the housing interior and a heat sink positioned at least partially within the air passage and thermally connected to the electronics assembly. Operation of the motor assembly draws an ambient airflow into the air passage in the radial direction through the air intake, directs the airflow along the heat sink, and exhausts the airflow through the air outlet in the radial direction.
Abstract:
A pump includes a housing including a first portion thereof defining opposed parallel spaced apart internal and exterior generally planar surfaces. The pump also includes a first impeller rotatably secured to the housing and positioned within the housing. The pump also includes a first axial flux motor connected to the first impeller and at least partially positioned within the housing. The first axial flux motor includes a first motor rotor fixedly secured to the first impeller. The first motor rotor has a generally planar surface thereof positioned adjacent to and parallel to the internal generally planar surface of the first portion of the housing. The first axial flux motor includes a first motor stator fixedly secured to the housing. The first motor stator has a generally planar surface thereof positioned adjacent to and parallel to the external generally planar surface of the first portion of the housing.
Abstract:
An electric motor assembly for pumping a fluid through a fluid cavity includes a stator assembly including a plurality of conduction coils configured to transmit heat energy to the fluid within the fluid cavity. The electric motor assembly also includes a rotor assembly positioned adjacent the stator assembly to define an axial gap therebetween. The electric motor assembly also includes an impeller directly coupled to the rotor assembly opposite the stator assembly such that the rotor assembly and the impeller are configured to rotate about an axis. The rotor assembly and the impeller are configured to be submerged in the fluid within the fluid cavity.