Patent ID: 11970973
Assignee: ROLLS-ROYCE ELECTRICAL NORWAY AS
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  H  Y | IPC F  H

Claim 7:
8. A method of cooling an electric machine, the method comprising:
supplying, by a cooling system, a cooling fluid to flood a stator portion of the electric machine with the cooling fluid, wherein the electric machine comprises a stator tube configured to contain the cooling fluid within the stator portion of the electric machine and prevent the cooling fluid from contacting a rotor of the electric machine, wherein the stator portion comprises one or more windings, wherein the rotor comprises 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 portion;
supplying, by the cooling system and via a proximal bearing volume inlet, the cooling fluid to a proximal bearing volume comprising a proximal bearing disposed along a proximal half of the rotor and in contact with a portion of the rotor;
supplying, by the cooling system and via a distal bearing volume inlet, the cooling fluid to a distal bearing volume comprising a distal bearing disposed along a distal half of the rotor and in contact with a portion of the rotor;
receiving, by a chip detector, the cooling fluid from at least one of the proximal bearing volume or the distal bearing volume, wherein the cooling fluid exiting the stator portion is not received by the chip detector before returning to a cooling fluid tank configured to store the cooling fluid; and
analyzing, by the chip detector, the cooling fluid for chips.