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Magnetic bearings in accordance with the provision of magnetic force can be divided into active magnetic bearing, passive magnetic bearing and hybrid magnetic bearing. Generally hybrid magnetic bearing uses permanent magnet material for the replacement of solenoid active magnetic bearings to produce bias magnetic field reducing the size of magnetic bearing. Therefore, permanent magnet biased magnetic bearing of magnetic bearing is an important field of research. Permanent magnet biased radial and axial magnetic bearing , which sets the functions of radial and axial magnetic bearings in one, of novel bearingless motor reduces volume and axial length of overall system and improve the critical speed of the rotor.
This design firstly generalizes the significance and current situation of non-bearing motor, arranges the main contents of papers. According to the basic working principle of magnetic bearing, analyzing the system structure of bearingless motor, we program the structures and layouts of main arbor and parts, establish the basic structure of the motor model,calculate the main parts of motor, and draw the diagrams of components and assemblies.
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