Electrical machine having centrally disposed stator
View Patent ↗An internal combustion engine has a liquid-cooled electrical machine mounted thereon. The liquid-cooled electrical machine includes a centrally disposed stator having stator windings. A rotor is mounted on a rotatable member for rotation therewith. The rotor extends about the stator. A cooling chamber is disposed within the stator and has an inlet for a coolant and an outlet for the coolant connected thereto.
1. A liquid-cooled electrical machine comprising:
a centrally disposed stator having stator windings, the stator being annular and having a central opening;
a rotor mounted on a rotatable member for rotation therewith, the rotor extending about the stator; and
a cooling chamber disposed within the stator and having an inlet for a coolant and an outlet for the coolant connected thereto, the chamber including a watertight casing separating the coolant from the stator windings, the casing extending through the central opening and contacting the stator for heat transfer therebetween; and
a housing extending about the rotor and the stator, the casing being formed in part by a portion of the housing.
2. The machine as claimed in claim 1 , wherein the casing includes a plate sealingly mounted on the housing, the inlet and outlet being connected to the plate.
3. The machine as claimed in claim 2 , including a tube connected to one of the inlets and the outlet and extending into the central opening of the stator to prevent short-circuiting of the coolant from the inlet into the outlet.
4. A combination engine and liquid-cooled electrical machine mounted thereon, the liquid-cooled electrical machine comprising:
a centrally disposed stator having stator windings, the stator being annular and having a central opening;
a rotor mounted on a rotatable member for rotation therewith, the rotor extending about the stator; and
a cooling chamber disposed within the stator and having a inlet for a coolant and an outlet for the coolant connected thereto;
the chamber including a watertight casing separating the coolant from the stator windings, the casing extending through the central opening and contacting the stator for heat transfer therebetween; and
a housing extending about the rotor and the stator, the casing having a portion which is integral with the housing.
5. The combination as claimed in claim 4 , wherein the casing includes a plate sealingly mounted on the housing, the inlet and outlet being connected to the plate.
6. The combination as claimed in claim 5 , including a tube connected to one of the inlet and the outlet and extending into the central opening of the stator to prevent short-circuiting of the coolant from the inlet into the outlet.