Hybrid magnetic suspension bearing, motor and air conditioner

Abstract

The invention provides a hybrid magnetic suspension bearing, a motor and an air conditioner. The hybrid magnetic suspension bearing comprises a bearing rotor assembly and a plurality of bearing stator assemblies arranged around the circumferential outer side of the bearing rotor assembly at intervals, the bearing rotor assembly comprises a rotor core, and each bearing stator assembly comprises a stator core; the rotor core is U-shaped in the axial section of the rotor core, the stator core is U-shaped in the axial section of the stator core, and an opening of the U-shaped rotor core is opposite to an opening of the U-shaped stator core. According to the invention, magnetic flux coupling does not exist among the magnetic poles in the magnetic suspension bearing, so that control can be simplified, an axial magnetic suspension bearing does not need to be independently arranged, the design cost is reduced, the axial length of the motor is shortened, and the rotating speed of the motor is increased.

Description

technical field [0001] The invention belongs to the technical field of motor manufacturing, and in particular relates to a hybrid magnetic suspension bearing, a motor and an air conditioner. Background technique [0002] The magnetic levitation motor uses the electromagnetic force of the magnetic levitation bearing to suspend the motor rotor in the air, so that there is no mechanical contact and mechanical friction between the motor rotor and the motor stator. It is a low-loss, high-performance motor. While realizing the high speed of the motor rotor, it also has the advantages of no mechanical wear, low energy consumption, low noise, long life, no lubrication and sealing, no oil pollution, etc. The rotor speed of the magnetic levitation motor is only limited by the tensile strength of the rotor material. Therefore, the peripheral speed of the magnetic levitation motor rotor can be very high, and it is more and more widely used in high-speed equipment. [0003] The traditio...

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Problems solved by technology

[0003] The traditional magnetic levitation motor basically includes a motor stator, a motor rotor, 2 radial magnetic bearings and 1 axial magnetic bearing. Due to the existence of the axial magnetic bearing, the length of the rotor shaft will be longer. On the one hand, the overall axial dimension of the motor will be skewed. On the other hand, the greater the deflection of the longer rotor shaft, the poorer the deformation resistance, which limits the increase of the motor speed; moreover, the assembly of too many magnetic bearings leads to low assembly efficiency

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