Permanent-magnetic rotor with non-magnetic-permeable distance sleeve and method for manufacturing permanent-magnet rotor

Abstract

The invention discloses a permanent-magnetic rotor with a non-magnetic-permeable distance sleeve and a method for manufacturing the permanent-magnetic rotor. The method includes sleeving the non-magnetic-permeable distance sleeve made of a non-magnetic-permeable material on a rotor shaft at first when iron cores of the rotor are mounted on the rotor shaft; then manufacturing the iron cores of the rotor into fan-shaped iron cores; uniformly distributing and fixedly mounting the fan-shaped iron cores of the rotor on the non-magnetic-permeable distance sleeve; encircling four surfaces, except for the arc-shaped upper end surface and a contacting surface with the non-magnetic-permeable distance sleeve, of each fan-shaped iron core, which is fixedly mounted on the non-magnetic-permeable distance sleeve, of the rotor by permanent magnets made of permanent magnetic materials in an attached manner; and arranging attached surfaces of the permanent magnets and the fan-shaped iron cores of the rotor properly so that magnetic polarities of the attached surfaces of the permanent magnets and the fan-shaped iron cores are identical correspondingly. The permanent-magnetic rotor has the advantages that the permanent-magnetic rotor is compact in structure, high in interference resistance, stable in work performance and long in service life, flux leakage at axial ends and flux leakage interference of the rotor are low, magnetic efficiency and utilization rate of each permanent magnet are high, and the like.

Description

technical field [0001] The invention relates to a permanent magnet rotor provided with a non-magnetic isolation sleeve and a manufacturing method thereof, belonging to the technical field of permanent magnet motor manufacturing. Background technique [0002] Permanent magnet motors have the advantages of high efficiency and high power density, and have recently received more and more attention. Among them, the permanent magnet interpolation motor has the advantages of simple processing, and the permanent magnet of the rotor can realize the magnetization effect, which is a kind of permanent magnet motor widely used. However, the existing permanent magnet interpolated rotors for permanent magnet motors generally have the problem of magnetic flux leakage at the axial ends, and the pressure plates on both sides of the rotor axial direction must be made of non-magnetic materials, otherwise the rotor axial The flux leakage at the end is more serious. And this kind of rotor that ...

AI Technical Summary

Problems solved by technology

However, the existing permanent magnet interpolated rotors for permanent magnet motors generally have the problem of magnetic flux leakage at the axial ends, and the pressure plates on both sides of the rotor axial direction must be made of non-magnetic materials, otherwise the rotor axial The flux leakage at the end is more serious

And this kind of rotor that uses non-magnetic materials to make both side end pressure plates not only has the disadvantages of large volume and low magnetic efficiency, but also has the problems of low strength and short service life; in addition, the permanent magnets in the prior art The rotor shaft of the magneto rotor is generally made of magnetically permeable materials, and the rotor core is directly installed on the rotor shaft, so the phenomenon of magnetic leakage through the rotor shaft is very serious. For some applications requiring small magnetic interference, the existing These permanent magnet motors are not suitable

Therefore, the use effect of the existing permanent magnet motor rotor is not ideal enough.

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