Embedded permanent magnet variable-frequency motor rotor

Abstract

The invention belongs to the technical field of motors, and particularly relates to an embedded permanent magnet variable-frequency motor rotor which comprises a main body, and a rotating shaft is mounted in the middle of the main body; a radial groove and a tangential groove are formed in the main body; permanent magnets are mounted in the radial grooves and the tangential grooves; reeds are mounted on the side wall of the tangential grooves; reeds are mounted on the side walls of the radial grooves; an open slot is formed in the side surface of the permanent magnet; the convex part on the reed can be inserted into the open slot; an arc-shaped stop block is arranged at an inlet of the open slot; and the radial grooves and the tangential grooves in the main body jointly form a mixed permanent magnet mounting mode. According to the invention, the rotor assembly difficulty can be reduced, the permanent magnets in the rotor are fully fixed, the use of fillers is reduced or canceled, and the possibility of vibration of the permanent magnets is reduced.

Description

technical field [0001] The invention belongs to the technical field of motors, in particular to an embedded permanent magnet variable frequency motor rotor. Background technique [0002] The built-in motor is mainly composed of a stator and a rotor as a whole. The stator is fixed and consists of a stator body and windings. The stator body is made of laminated stator laminations, and the windings are wound around the teeth of the stator body. The rotor rotates and is composed of a rotor body and a permanent magnet. The rotor body is formed by stacking rotor laminations. A permanent magnet slot is arranged inside the rotor body, and the permanent magnet is fixed in the permanent magnet slot. The existing built-in permanent magnet motor rotating permanent magnet mainly fixes the permanent magnet in the permanent magnet groove by using resin, viscose and other fillers, or sets a protrusion on the edge of the permanent magnet groove, and uses the permanent magnet and the perman...

AI Technical Summary

Problems solved by technology

The existing built-in permanent magnet motor rotating permanent magnet mainly fixes the permanent magnet in the permanent magnet groove by using resin, viscose and other fillers, or sets a protrusion on the edge of the permanent magnet groove, and uses the permanent magnet and the permanent magnet groove The cooperation between them, and the use of resin, viscose and other fillers to fix the permanent magnet 4 in the permanent magnet groove, but both solutions have fillers that are affected by heat and aging, resulting in failure of the filler and unable to fully fix the permanent magnet. , the permanent magnet is loose, which affects the normal operation of the motor

At the same time, it is difficult to assemble through fillers such as resin and viscose, and after the rotor is scrapped, it is difficult to disassemble and it is not easy to recycle raw materials

[0003] There are also some technical solutions in the prior art, such as the Chinese patent application number CN201721885663.1, which includes a rotor core, the rotor core is a cylindrical structure, and a circular through hole is set in the middle of both ends of the rotor core. The diameter of the left through hole is larger than that of the right through hole. A magnetic steel groove is set on one end face of the larger through hole of the rotor core. The magnetic steel groove is semicircular. Three rivet holes are evenly arranged on the end face of the rotor core, and a magnetic isolation sheet is arranged at the end of the rotor core where the magnetic steel groove is set, and the magnetic isolation sheet is riveted together with the rotor iron core by rivets; in this scheme, by setting the magnetic steel The groove and the magnetic spacer are fixed by rivets, which reduces the difficulty of rotor assembly. However, during use, it cannot be guaranteed that the magnet will not move in the magnet groove. It is easy to cause differences in the specifications of the magnet, resulting in There is a small displacement of steel in the magnetic steel groove, which leads to the failure of the dynamic balance of the rotor, aggravates the wear of the rotor, and shortens the service life of the rotor

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