Rotor of miniature permanent magnet motor

Abstract

The invention discloses a rotor of a miniature permanent magnet motor, and relates to the technical field of motors. The motor comprises a rotor body, wherein a rotating shaft is embedded in the central position of the rotor body, a permanent magnet block is arranged on the inner side of the rotor body, a fixing frame is sleeved on the outer side of the rotor body, and is used for fixing the permanent magnet block, and bearings are arranged at the two ends of the rotating shaft in a sleeving mode. According to the invention, the rotor is reasonable in structure, convenient to mount and dismount and good in stability; the permanent magnet block can be fixed in the rotor core through the arranged fixing frame, so that the stability is improved, and the permanent magnet block cannot be disengaged when the motor rotates at a high speed; and the fixing frame can be quickly mounted and dismounted, so that the permanent magnet block can be conveniently replaced, the subsequent maintenance processing of the rotor is convenient, the problems of poor stability and easy shedding of the permanent magnet blocks bonded on the rotor yoke in the existing permanent magnet motor rotor are solved, the service life of the motor rotor is prolonged, and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a rotor of a miniature permanent magnet motor. Background technique [0002] The permanent magnet brushless DC motor is a DC motor with a magnetic field established by one or more permanent magnets. Its performance is similar to that of a separately excited DC motor with constant excitation current, and the speed can be easily adjusted by changing the armature voltage. Compared with other DC motors, it has the advantages of small size, high efficiency, simple structure, and less copper consumption. It is the main type of low-power DC motors. [0003] A permanent magnet motor is mainly composed of a stator, a rotor, and an end cover. The rotor refers to a rotating body supported by a bearing, and is mainly composed of a rotor core, a permanent magnet, and a rotating shaft. [0004] However, the permanent magnets in the rotors of micro permanent magnet motors currently on the marke...

AI Technical Summary

Problems solved by technology

[0004] However, the permanent magnets in the rotors of micro permanent magnet motors currently on the market are usually bonded to the outer circumference of the rotor yoke with high-temperature glue, or the permanent magnets are embedded on the outer circumference of the rotor yoke. When the torque increases, the The greater the shear force, the lower the fatigue resistance of the permanent magnet as a component, and the greater the possibility of damage. The stability of the permanent magnet is not good. service life

Images