Comparison of magnetic bearings and hybrid roller bearings in a mobile flywheel energy storage

The comparison of active magnetic bearings and hybrid ceramic roller bearings regarding their application in a mobile flywheel energy storage is discussed in this paper. The consequences of using the two mentioned bearing types are presented concerning dynamic behavior, load capabilities, constructive parameters and reliability. To achieve a design guidance which bearing type to use two flywheel designs with the same power and capacity but different bearing concepts were simulated in a simplified drive cycle to show their different characteristics.