Mechanical structure and position regulation
Osamu Ichikawa
There are two main mechanical arrangements for rotational electric machines – radial gap machines and axial gap machines. Although most of the proposed bearingless motors are radial gap machines it is possible to construct axial flux types of this machine. In this chapter, different mechanical structures for the bearingless motor are introduced and the axial-gap type of bearingless motor is described in detail. This actively regulates the thrust and inclination movements of the rotor. One aspect highlighted is that radial vibration is shown to be suppressed with a small rotor incline at the critical speeds.
17.1 Mechanical structure
17.1.1 Radial gap bearingless motor
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