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In practical motors, static eccentricity and dynamic eccentricity (DE) (mixed eccentricity) appear rarely with the developed manufacturing techniques nowadays. Curved eccentricity takes up most of the eccentricity. However, the motor is dynamic eccentric in axial cross section when in curved eccentricity. Eccentricity is bound to cause unbalanced magnetic pull (UMP), whereas the study of dynamic UMP...
The bearingless permanent magnet synchronous motor (BPMSM) is an innovational type of motor, which has all excellence of magnetic bearings. The BPMSM is a high-order, nonlinear and strong coupling multivariable system. Bearingless motors have a set of torque windings and a set of additional suspension force windings in the stator slots. In order to realize the rotor suspending and motor operation...
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