A motor that is operable in response to an external power supply includes a stator core that is electrically connected to the external power supply and a rotor core positioned adjacent the stator core and rotatable about an axis in response to power being delivered to the stator core by the external power supply. A first encasement member is formed around the stator core to define a cavity and a second encasement member is formed around the rotor core and is sized such that at least a portion of the second encasement member and rotor core is disposed within the cavity. A quantity of coolant is disposed within the cavity.
1. A motor comprising:
a stator core having an exposed outer surface and defining a cavity having a first open end and a second open end;
a rotor core positioned at least partially within the stator core;
a quantity of coolant, at least a portion of which is positioned between the rotor core and the stator core;
a first encasement member completely enveloping the entire stator core to inhibit direct contact between the stator core and the coolant, the first encasement member covering the first open end and being in direct contact with substantially the entire exposed outer surface of the stator core;
a second encasement member coupled to the rotor core to inhibit direct contact between the rotor core and the coolant; and
a cap coupled to the first encasement such that the cap substantially covers the second open end to substantially seal the quantity of coolant within the first encasement member.
2. The motor of claim 1 , further comprising a bearing support portion integrally-formed as part of the first encasement member.
3. The motor of claim 2 , further comprising a bearing at least partially supported by the bearing support, the bearing positioned to at least partially support the rotor core for rotation.
4. The motor of claim 3 , wherein the bearing is substantially non-metallic.
5. The motor of claim 1 , wherein the coolant is water.
6. The motor of claim 1 , wherein at least one of the first encasement member and the second encasement member is a polymer.
7. The motor of claim 1 , wherein the stator core is completely encased within the first encasement member and the rotor core is completely encased within the second encasement member.