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US 2014/0210424 A1Published application
High speed flywheel on magnetic bearings
AssigneeSkf Magnetic Mechatronics
InventorUlrich Schroeder
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Abstract
A high speed energy storage flywheel comprises a rotor which is located in a vacuum chamber provided in a stator housing and is supported by magnetic bearings with respect to the stator housing. A fluid tank used for releasing in a controlled manner, a fluid inside the vacuum chamber and therefore create a braking effect on the rotor by friction.
Claims15
A high speed energy storage flywheel system comprising:
- a rotor located in a vacuum chamber disposed in a stator housing and supported by active magnetic bearings, and
- a fluid tank and a control device configured for selectively releasing in a controlled manner a fluid inside the vacuum chamber upon detection of an emergency condition and then selectively creating a braking effect on the rotor by friction.
A method of operating a high speed energy storage flywheel comprising:
- rotating a rotor in a vacuum chamber disposed in a stator housing, the rotor being supported by active magnetic bearings with respect to the stator housing, and
- detecting an emergency condition where the magnetic bearings become faulty or deactivated, and
- releasing in a controlled manner inside the vacuum chamber a fluid from a fluid tank and therefore selectively creating a braking effect on the rotor by friction.
Dependencies are inferred from the claim text.