ELECTRIC MACHINE
First Claim
1. A subsea electric machine system, comprising:
- a main housing adapted to contain a fluid at a pressure above an ambient pressure about the main housing;
an electric machine in the main housing, the electric machine comprisinga stator; and
a rotor supported in the stator that, by interaction of magnetic fields between the stator and the rotor, at least one of moves relative to the stator or operates in generating electricity when moved relative to the stator, the rotor havingan elongate rotor core;
a plurality of permanent magnets arranged around the rotor core; and
a sleeve around the permanent magnets that provides primary radial support for retaining the permanent magnets to the rotor core during operation of the electric machine, the sleeve sealed to the rotor core to isolate the magnets from the fluid in the main housing; and
a companion device coupled to the rotor of the electric machine.
6 Assignments
0 Petitions
Accused Products
Abstract
An electric machine system includes an electric machine and a companion device. The electric machine has a stationary member and a movable member that, by interaction of magnetic fields, at least one of moves relative to the stationary member or generates electricity when moved relative to the stationary member. One of the stationary member and the movable member includes a permanent magnet. The companion device is coupled to the electric machine to communicate mechanical movement with the movable member. In certain instances, the electric machine system has adaptations for operation of the electric machine system subsea and/or in a corrosive environment.
-
Citations
22 Claims
-
1. A subsea electric machine system, comprising:
-
a main housing adapted to contain a fluid at a pressure above an ambient pressure about the main housing; an electric machine in the main housing, the electric machine comprising a stator; and a rotor supported in the stator that, by interaction of magnetic fields between the stator and the rotor, at least one of moves relative to the stator or operates in generating electricity when moved relative to the stator, the rotor having an elongate rotor core; a plurality of permanent magnets arranged around the rotor core; and a sleeve around the permanent magnets that provides primary radial support for retaining the permanent magnets to the rotor core during operation of the electric machine, the sleeve sealed to the rotor core to isolate the magnets from the fluid in the main housing; and a companion device coupled to the rotor of the electric machine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A rotor for use in a fluid filled housing of an electric machine, the rotor comprising:
-
an elongate cylindrical rotor core; a plurality of permanent magnets arranged around a circumference of the rotor core; and a covering around the permanent magnets adapted to seal the permanent magnets against contact with the fluid in the housing. - View Dependent Claims (14, 15, 16, 17)
-
-
18. An electric machine system, comprising:
-
a main housing adapted to contain a fluid at a pressure above an ambient pressure about the main housing; an electric machine in the main housing, the electric machine comprising a stator; a stator housing around at least a portion of the stator and sealed to prevent contact of fluid in the main housing with the stator; and a rotor supported in the stator that, by interaction of magnetic fields between the stator and the rotor, at least one of moves relative to the stator or generates electricity when moved relative to the stator, the rotor having a plurality of permanent magnets arranged around the rotor core and a covering that is sealed to prevent fluid in the main housing from contacting the permanent magnets; and a compressor coupled to the rotor of the electric machine. - View Dependent Claims (19, 20, 21, 22)
-
Specification