Circulating dielectric oil cooling system for canned bearings and canned electronics

A method for cooling a rotating machine, comprising:

• arranging a first radial bearing housing about a rotor, the first radial bearing housing having a first radial magnetic bearing sealed therein for levitating the rotor;
• arranging a second radial bearing housing about the rotor, the second radial bearing housing having a second radial magnetic bearing sealed therein for levitating the rotor;
• fluidly and sealingly coupling a controller can to the first and second radial bearing housings, the controller can having a bearing control system disposed therein;
• and
• immersing the first and second radial magnetic bearings and the bearing control system in a dielectric liquid coolant.

A cooling system for a rotating machine, comprising:

• a first radial bearing housing arranged about a rotor and having a first radial magnetic bearing sealed therein for levitating the rotor;
• a first sealed conduit extending from the first radial bearing housing;
• a second radial bearing housing arranged about the rotor and having a second radial magnetic bearing sealed therein for levitating the rotor;
• a second sealed conduit extending from the second radial bearing housing;
• a controller can having a bearing control system disposed therein, the controller can being coupled to the first and second sealed conduits with first and second connectors that provide a pressure boundary between the controller can and the first and second sealed conduits;
• wiring extending from the bearing control system to the first and second radial bearing housings via the first and second sealed conduits, respectively;
• a first coolant within the first and second radial bearing housings and the first and second sealed conduits, the first and second radial magnetic bearings and the wiring within the first and second sealed conduits being immersed in the first coolant;
• and
• a second coolant within the controller can such that the bearing control system and wiring within the controller can are immersed in the second coolant.