Magnetic suspension motor with hollow and split type rotor structure

Abstract

The invention discloses a magnetic suspension motor with a hollow and split type rotor structure. The magnetic suspension motor is mainly composed of a hollow and split type shaft extension rotor, a radial magnetic bearing, an axial magnetic bearing, a protection bearing, a permanent magnet synchronous motor, a motor shell, a motor locking nut, an end cover and the like. The permanent magnet synchronous motor is located in the middle of the magnetic suspension motor, and a magnetic bearing assembly, a displacement sensor assembly, a protection bearing assembly, a locking nut sealing cover and the like are arranged outwards. The motor has the advantages of compact structure, small size, light weight, high power density, high efficiency, high reliability and the like; the hollow rotor structure is adopted, the weight of the rotor is light, the critical rotating speed of the rotor is increased, the falling damage degree is reduced, the safety margin of the rotor is improved, in addition, the hollow structure facilitates cooling of the rotor, and the efficiency of the motor is improved; and meanwhile, the rotor adopts a split shaft extension structure, so that the adaptability of working conditions of the motor is widened, the maintenance cost is reduced, and mass production is facilitated.

Description

technical field [0001] The invention belongs to the technical field of magnetic levitation motors, in particular to a magnetic levitation motor with a hollow and split rotor structure, which can be used as a power device in the fields of centrifugal blower, compressor, molecular pump, refrigeration compressor, generator and expander, etc. . It particularly relates to a magnetic levitation motor with a hollow and split shaft extension rotor structure. Background technique [0002] Magnetic levitation high-speed permanent magnet motors generally have the characteristics of relatively high power density, and the corresponding loss density is also relatively large. When the cooling conditions are not good enough, the temperature rise of the motor will be relatively high. For example, if the temperature rise of the motor stator winding is too high, the insulation will be unreliable. When the rotor temperature rises too high, the permanent magnet may be demagnetized. Excessive te...

AI Technical Summary

Problems solved by technology

At the same time, limiting the critical speed of the magnetic levitation motor mainly lies in the mode of the rotor assembly. When the magnetic levitation motor falls, the rotor assembly will collide with the protective bearing and cause great damage. For this, the rotor structure also needs to be optimized

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