High-speed permanent magnet motor

Abstract

The invention discloses a high-speed permanent magnet motor. The high-speed permanent magnet motor comprises a motor casing and a radial bearing seat, wherein a rotor is supported to the motor casing and the radial bearing seat through a left radial hydrostatic bearing, a right radial hydrostatic bearing and an axial hydrostatic bearing; the left radial hydrostatic bearing, the right radial hydrostatic bearing and the axial hydrostatic bearing are porous hydrostatic bearings adopting a low-viscosity gaseous and liquid two-phase fluid as a lubricating medium. The liquid phase of the low-viscosity two-phase fluid of the high-speed permanent magnet motor has the characteristic of low viscosity coefficient, so that the fluid can penetrate through a porous bushing, part of the liquid is gasified due to pressure reduction in the process, and part of the liquid arrives to gaps between the bearings and the rotor; the part of liquid of the low-viscosity two-phase fluid is continuously gasified when discharged from the bearings in the axial direction, so that the amount of gas in the gaps is increased, the bearing capacity of the high-speed permanent magnet motor is improved, and the position precision of the hydrostatic gas bearings is maintained; besides, the liquid part of the low-viscosity two-phase fluid cools the hydrostatic bearings and the motor rotor in the gasifying process.

Description

technical field [0001] The invention relates to a motor, in particular to a high-speed permanent magnet motor. Background technique [0002] The high-speed motor provides a new direct drive method, which avoids the speed increase of the gearbox and reduces the transmission loss, and has been widely used in small and micro electromechanical equipment. The high-speed permanent magnet motor uses permanent magnets to significantly reduce the loss of the rotor and further improve the efficiency of the motor. [0003] With the simultaneous increase of motor speed (above 10000RPM) and power (above 50KW), limited by the strength of the motor rotor material, the size of the high-speed permanent magnet motor must be reduced, that is, the power density of the motor is significantly increased, and the calorific value per unit volume is increased. , the traditional method of adding water jacket cooling outside the motor casing has been difficult to effectively cool the motor stator, and...

AI Technical Summary

Problems solved by technology

The disadvantage is the need for external pressurization equipment

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