A kind of inner rotor magnetic bearing

Abstract

The invention relates to an inner rotor magnetic bearing which comprises a U-shaped passive part inner rotor magnetic conducting ring, inner rotor permanent magnets, inner rotor magnetic conductors, an inner rotor iron core, gas gaps, stator iron cores, a stator magnetic conducting ring, stator permanent magnets, a coil, a U-shaped passive part stator magnetic conducting ring and a passive part gas gap, wherein each stator iron core consists of four magnetic poles, respectively forming magnetic poles in positive and negative directions of an axle X and an axle Y, a certain gap is reserved between the outer surface of the inner rotor iron core and the inner surface of each stator iron core to form the gas gap, the U-shaped passive part stator magnetic conducting ring is arranged between two stator iron cores, two stator permanent magnets are arranged between the stator iron cores and the U-shaped passive part stator magnetic conducting ring, the two inner rotor permanent magnets are arranged between the inner rotor magnetic conductors, and the passive part gas gap is formed between the outer surface of the U-shaped passive part inner rotor magnetic conducting ring and the inner surface of the U-shaped passive part stator magnetic conducting ring. The inner rotor magnetic bearing has the characteristics of being small in size and being easy to dismantle.

Description

technical field [0001] The invention relates to a non-contact magnetic suspension bearing, especially an inner rotor magnetic bearing, which is used to provide four-degree-of-freedom support, and can be used as a non-contact support for rotating components such as a single-frame control moment gyroscope and a double-frame control moment gyroscope for space. . Background technique [0002] Magnetic suspension bearings are divided into pure electromagnetic type and hybrid magnetic suspension bearing with permanent magnetic bias and electromagnetic control. The former uses large current and high power consumption, and the hybrid magnetic suspension bearing with permanent magnetic bias and electromagnetic control uses permanent magnets instead of pure electromagnetic magnetic bearings. The bias current in the bearing generates a bias magnetic field, the magnetic field generated by the permanent magnet bears the main bearing capacity, and the electromagnetic field provides an aux...

AI Technical Summary

Problems solved by technology

In order to increase the output torque, the existing magnetic levitation control torque gyroscope usually adopts a five-degree-of-freedom fully active magnetic bearing configuration. However, the magnetic levitation control torque gyroscope with this structure uses current to control the output torque, so it consumes a lot of power and is bulky. , the circuit is complex, and the two-degree-of-freedom magnetic levitation control torque gyroscope with passive magnetic bearing output torque can be made very small, but because the passive magnetic bearing is uncontrollable, it has the defects of low damping and poor stability. In addition, the existing passive If the magnetic bearing improves its passive support stiffness, it will bring additional displacement negative stiffness to the radial active magnetic bearing

Images