SU1182584A1 - Method of magnetizing multipole rotors of electric machines with permanent magnets - Google Patents

Abstract

1. A method of magnetizing multipolar rotors of electric machines with permanent magnets, which consists in applying a magnetic field with alternating polarity, characterized in that, in order to increase the use of the magnet material in the rotor, the magnetization is executed by means of a template by using the template by using the template by the one of the template. one polarity and reverse polarity, to the rotor shaft and radially located on its surface i to the central part of the magnet a soft bushing. (L 00 1C el 00 4

Description

2. The method according to p. 1, about tl and h ayi u and s, in that the imposition of a magnetic field is carried out sequentially along the rotor sections in the axial direction; simultaneously, an additional magnetic sleeve is displaced in the axial direction, and Y4aciKOB of each of the rotor poles, on which the magnetic field of one polarity is applied, does not exceed the radial total cross section of the soft bushing magnet and the rotor shaft, on which the reverse polarity magnetic field is applied.

This invention relates to the production of multi-pole permanent magnet electric machines. The aim of the invention is to increase the use of the magnet material in a multi-pole rotor with radially textured permanent magnets. FIG. 1 shows a rotor with a magnetizing device, a cross-section; in fig. 2 is a section AA in FIG. 1. The rotor contains a multipole annular permanent magnet 1 with a radial texture on poles 2, separated moving poles 3 of a magnetizing device, the source of a magnetic field is an electromagnet 4, the magnetic cores 5 connecting the separated poles 3 to the shaft 6 and a magnet sleeve 7 located between shaft 6 and rotor magnet 1, the magnetizing coils 8, which can be connected in pairs in pairs with polarity shown in FIG. 1, a flexible magnet bushing movable by an additional magnet .7 successively moving in the axial direction to the magnetizable portions of the rotor simultaneously with the movement of the magnetizing poles 3 of the electromagnet 4 and being a technological magnetic shunt for mounting the magnetized rotor in the stator without opening the magnetic circuit of the rotor poles 2. To magnetize a multi-pole rotor with permanent magnets of circular shape, having a radial pole direction with a radial crystalline and magnetic texture in accordance with the method, the rotor is placed into the gap between the separated electromagnet loops so that the separated movable poles 3 coincide with the poles 2 of the rotor the sides of one of the end surfaces of the rotor, and the shaft 6 and magnet hca sleeve 7 of the rotor - on the other end surface of the rotor are aligned with the magnetic cores 5, connecting in this position the rotor A shaft and a magnetically soft bushing with divided poles 3 of electromagnet 4 are connected in series with alternating polarity to the magnetizing coils the pulsed or direct current source and, after magnetizing all pairs of poles of the rotor section, move the movable separated poles together with the technological shunt bushing to the axial direction of the shunt bushing in the axial direction of the rotor in the axial direction of the rotor in the axially wedge in the axial direction of the rotor in the axially wedge in the axial direction of the rotor in the axially wedge in the axial direction of the rotor in the axially wedge in the axial direction of the rotor in the axially in the center of the rotor in the axial direction of the rotor in the axial direction of the rotor in the axial direction of the rotor in the axial direction of the rotor in the axially in the center of the axially in the center of the axially in the center of the axially in the center of the axially in the center of the axial sleeve in the axially in the center of the axially in the center of the axially in the axial sleeve. sections of the rotor so that the shunt bushing coincides with the surface of the magnetized section of the rotor, and the separated poles follow with a non-magnetized part of the rotor. After the last section of the rotor is magnetized (shown in dotted line in Fig. 2), the rotor moves from the zone separated by magnetizing poles — simultaneously with the soft bushing magnet moving to this area of the shunt pole. The application of the proposed magnetization method of multipolar rotors of electric machines with permanent magnets reduces the material consumption of magnets per unit of magnetic energy produced by the rotor by increasing the use of the material of magnets I with a radial texture and replacing the central unused part of the magnet material with a magnet g Kof with a sleeve of cheap ferromagnetic material.

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Claims (2)

1. METHOD OF MAGNETIZATION OF MULTI-POLE ROTORS OF ELECTRIC MACHINES WITH PERMANENT MAGNETS, which consists in applying a magnetic field with alternating polarity, characterized in that, in order to increase the use of the material of the magnets in the rotor, magnetization is carried out by sequentially applying the magnetic field to one of the polar poles of the external polar and reverse polarity, to the rotor shaft and radially located on its surface to the central part of the magnet magnetically soft sleeve. 00 to SP 00 4 * 2. The method according to π. 1, with the fact that the magnetic field is applied sequentially over the rotor sections in the axial direction a magnetic field of one polarity is superimposed, does not exceed the radial total cross section of the magnetically soft sleeve and rotor shaft, on which a magnetic field of reverse polarity is superimposed.