Magnetic bearing used for switch reluctance motor

Abstract

The invention discloses a magnetic bearing used for a switch reluctance motor. The magnetic bearing comprises a magnetic bearing supporting sleeve, an annular guide groove is formed inside the magnetic bearing supporting sleeve, a magnetic bearing rotor arranged outside a motor rotating shaft in a sleeving manner is arranged in the annular guide groove, a magnetic bearing radial control set is arranged on the outer side of the magnetic bearing rotor, magnetic pieces are arranged at one end of the magnetic bearing radial control set, and the outer sides of the magnetic pieces are each providedwith a magnetic bearing axial control winding and a magnetic bearing radial control winding; and concave grooves are formed in the two sides of a notch where the magnetic bearing and the motor rotating shaft are connected in a sleeving manner, a plurality of elastic elements are arranged in each concave groove, and a radial distance sensor is further arranged on the notch. The magnetic bearing issmall in friction loss and high in working efficiency, the rotor floats on the space through magnetic field force, the bearing supporting performance is good, the rotating shaft is prevented from being collided, and the radial sensor monitoring function is achieved.

Description

technical field [0001] The invention relates to the technical field of machinery, in particular to a magnetic suspension bearing used for a switched reluctance motor. Background technique [0002] With the substantial improvement of domestic motor manufacturing level, AC servo motor control technology has gradually been mastered by more and more domestic manufacturers, which has contributed to the realization of domestic servo drive manufacturers from start to full expansion in less than ten years. development trend. Motor and drive companies have devoted themselves to the servo industry and realized industrialization and large-scale production. However, the domestic servo motor mechanical bearing control system is mainly low-end products with low power, and the high cost performance attracts the use of relatively low accuracy requirements. Customers still have a large gap with foreign products in terms of function, performance and technology. The AC servo motor control syst...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, mechanical wear not only greatly reduces the service life of the switched reluctance servo motor and affects the accuracy, but also causes the uneven air gap of the switched reluctance servo motor, the heating of the winding, and the increase in temperature rise, which deteriorates the characteristics of the motor. The efficiency is reduced, shortening the service life of the switched reluctance motor and equipment, and at the same time, it brings the problem of lubricating fluid and cooling fluid pollution

In order to overcome these problems, new bearings such as air bearings and liquid bearings were widely used in early servo control systems, which reduced the mechanical wear of the bearings. In particular, the liquid floating bearing still pollutes the environment, and its application is limited, which affects the efficiency and service life of the motor.

Images