Bearing assembly including rotating element and magnetic bearings

A bearing assembly comprising:

• an axial rotatable structure including a cylindrical rotor assembly, the rotor assembly including a motor rotor and a plurality of magnetic bearing rotors;
• a cylindrical stationary shaft;
• rotating element bearings mechanically coupling the rotatable structure and the stationary shaft;
• and
• a cylindrical stator assembly including a motor stator and a plurality of magnetic bearing stators, the magnetic bearing stators and the magnetic bearing rotors forming magnetic bearings magnetically coupling the rotor and stator assemblies.

A flywheel assembly bearing assembly comprising:

• an axial rotatable structure including a flywheel), a cylindrical rotor assembly, the rotor assembly including a motor rotor and a plurality of magnetic bearing rotors;
• a cylindrical stationary shaft;
• rotating element bearings mechanically coupling the rotatable structure and the stationary shaft;
• and
• a cylindrical stator assembly including a motor stator and a plurality of magnetic bearing stators the magnetic bearing stators and the magnetic bearing rotors forming magnetic bearings magnetically coupling the rotor and stator assemblies.