Abstract: A pump assembly includes a pump housing having a fluid inlet, a fluid outlet, and a fluid channel defined therebetween. The pump assembly also includes an impeller positioned within the fluid channel and configured to channel a fluid between the fluid inlet and the fluid outlet. The pump assembly also includes a motor assembly having a shaft coupled to the rear plate, wherein the shaft defines a first fluid cavity coupled in flow communication with an opening in the rear plate to enable fluid flow into the shaft. The motor assembly also includes a motor housing having a back plate positioned relative to the impeller rear plate to define a second fluid cavity therebetween. The motor assembly further includes a stator assembly coupled to the back plate and positioned opposite the second fluid cavity such that the fluid facilitates cooling the stator assembly.

Abstract: An electric motor assembly includes a stator assembly and a rotor assembly positioned adjacent the stator assembly to define an axial gap therebetween. The stator assembly is configured to induce a first axial force on the rotor assembly. 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. A fluid channeled by the impeller induces a second axial force on the impeller. The electric motor assembly further includes a hydrodynamic bearing assembly including a rotating member coupled to the rotor assembly and stationary member at least partially circumscribing the rotating member such that rotation of the rotating member with respect to the stationary member is configured to induce a third axial force on the rotor assembly.

Abstract: A pump assembly includes a pump housing having a fluid inlet, a fluid outlet, and a fluid channel defined therebetween. The pump assembly also includes an impeller positioned within the fluid channel and configured to channel a fluid between the fluid inlet and the fluid outlet. The pump assembly also includes a motor assembly having a shaft coupled to the rear plate, wherein the shaft defines a first fluid cavity coupled in flow communication with an opening in the rear plate to enable fluid flow into the shaft. The motor assembly also includes a motor housing having a back plate positioned relative to the impeller rear plate to define a second fluid cavity therebetween. The motor assembly further includes a stator assembly coupled to the back plate and positioned opposite the second fluid cavity such that the fluid facilitates cooling the stator assembly.

Abstract: An electric motor assembly includes a stator assembly and a rotor assembly positioned adjacent the stator assembly to define an axial gap therebetween. The stator assembly is configured to induce a first axial force on the rotor assembly. 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. A fluid channeled by the impeller induces a second axial force on the impeller. The electric motor assembly further includes a hydrodynamic bearing assembly including a rotating member coupled to the rotor assembly and stationary member at least partially circumscribing the rotating member such that rotation of the rotating member with respect to the stationary member is configured to induce a third axial force on the rotor assembly.