A Thin Plate Model for Predicting Rotating Losses in Magnetic Bearings

Previously, thin plate assumptions have been used to obtain a one-dimensional eddy current model for predicting the stationary, transformer-type losses in magnetic bearings built out of laminated material. Using similar assumptions as in the l-D eddy current model, rotating losses can be predicted for a laminated heteropolar radial magnetic bearing. The thin plate model of rotating losses yields a hybrid analyt ical- boundary element model that is computationally inexpensive to implement. Predictio ns from this model compare favorably to losses experimentally m easured in rotor run-down tests.