Patent ID: 11970973
Assignee: ROLLS-ROYCE NORTH AMERICAN TECHNOLOGIES, INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  H  Y | IPC F  H

Claim 11:
12. A system comprising:
an electric machine comprising:
a stator comprising one or more windings;

a stator tube comprising a stator fluid inlet and a stator fluid outlet;
a rotor comprising a plurality of permanent magnets configured to reduce induced currents in the rotor and cause a majority of heat generated by the electric machine via energy conversion losses to be localized to the windings of the stator;
a proximal bearing housed within a proximal bearing volume disposed along a proximal half of the rotor;
a proximal bearing volume fluid inlet and a proximal bearing volume fluid outlet;
a distal bearing housed within a distal bearing volume separate from the proximal bearing volume and disposed along a distal half of the rotor;
a distal bearing volume fluid inlet and a distal bearing volume fluid outlet;

a gas turbine engine comprising a shaft coupled to the rotor of the electric machine;
a cooling system comprising:
a cooling circuit configured to supply cooling fluid, from a cooling fluid tank configured to store the cooling fluid, to the gas turbine engine, the stator tube via the stator fluid inlet, the proximal bearing volume via the proximal bearing volume fluid inlet, and the distal bearing volume via the distal bearing volume fluid inlet, wherein the stator tube is configured to contain the cooling fluid within a stator portion of the electric machine and prevent the cooling fluid from contacting the rotor; and

a chip detector fluidically coupled to the proximal bearing volume fluid outlet and distal bearing volume fluid outlet and configured to receive the cooling fluid from the proximal bearing volume and the distal bearing volume, wherein cooling fluid exiting the stator fluid outlet does not flow through the chip detector before returning to the cooling fluid tank.