Composite permanent-magnet rotor for permanent-magnet motor and manufacturing method thereof

Abstract

The invention discloses a composite permanent-magnet rotor for a permanent-magnet motor and a manufacturing method thereof. According to the invention, firstly, a magnetically-conductive shaft sleeve made from a magnetically-conductive material is sleeved on a rotor shaft; then, rotor cores are made into sectors, and the sectorial rotor cores are evenly distributed, mounted and fixed on the magnetically-conductive shaft sleeve; the other five surfaces of each sectorial rotor core mounted and fixed on the magnetically-conductive shaft sleeve except the upper end surface in the shape of a circular arc are all pasted and surrounded by permanent-magnet blocks made from magnetically-conductive materials, and each permanent-magnet block has the same polarity as the magnetic pole of the faying surface of each sectorial rotor core; the sectorial rotor cores and the permanent-magnet blocks are clamped and fixed on the magnetically-conductive shaft sleeve through annular end pressing plates fixed at both ends of the magnetically-conductive shaft sleeve; and the annular end pressing plates are made from magnetically-conductive materials. The composite permanent-magnet rotor has the advantages of compact structure, low flux leakage at axial end parts, high utilization rate of magnetic efficiency of permanent magnets, strong immunity from interference, stable working performance, high rotor strength, long service life and the like.

Description

technical field [0001] The invention relates to a composite permanent magnet rotor of a permanent magnet motor 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. However, the rotor using non-magneti...

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

However, 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.

Therefore the use effect of the rotor that existing permanent magnet motor is used is not ideal enough yet

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