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A new non-contact drive system has been developed employing a consequent-pole type bearingless permanent magnet (PM) motor. This bearingless motor has a much wider gap with respect to its rotor radius. Wide magnetic gaps can cause a decrease in radial magnetic suspension force of the bearingless motor because of an increase in magnetic reluctance. In this paper, the magnetic suspension forces of the...
Bearingless motors (BelMs) are characterized by Integration of electrical motors and magnetic bearings. Therefore, rotor shaft suspension can be realized without mechanical contacts or lubrication. In addition to advantages of conventional magnetic bearings, these motors are expected to have advantageous features such as small size, low cost and high critical speed. Accordingly, the various types...
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