1. What protection device does the magnetic bearing has when it encountered a sudden power failure?
The magnetic bearing has an UPS device. When it encountered a sudden power failure, the UPS device will provide the power to the magnetic bearing, pending rotor (motor) rotation speed gradually decreases until it stops.
2. What protection device does the magnetic bearing has when it encountered a sudden shutdown?
Magnetic bearing system installed auxiliary bearings at both ends. When it encountered a sudden shutdown, the rotor will first contact with the auxiliary bearings, it won’t contact with the magnetic bearings and stator directly.
3. The difference of magnetic bearing and air bearing.
We use the active magnetic bearing,
it can be real-time controlled according to the operating status of the rotor. The magnetic bearing can be stable suspension from 0 to rated speed range, air bearings require a certain speed (usually 5000rpm or more).
4. About supportive contrast between the magnetic bearing and air bearing.
Air bearing: The designed suspension force is related to the rotor operating state (speed size), and the maximum load is small. Magnetic bearing: it can be automatically adjusted within the designed maximum range, including setting bearing damping and stiffness. Theoretical maximum bearing force without limit (can be applied to a wide range).