JPH05191938A - Manufacture of permanent magnet rotor - Google Patents

Abstract

PURPOSE:To provide a simple manufacture for the permanent magnet of a motor wherein a plurality of permanent magnet pieces are arranged around a yoke. CONSTITUTION:In advance, a required number of permanent magnet pieces 12 are fixed temporarily onto a sheet or a glass fiber material impregnated with thermosetting resin 13, and it is wound on the periphery of a yoke 14 where a binder is applied uniformly, together with the sheet or glass fiber material, and then the binder is made thermoset to get a permanent magnet rotor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a permanent magnet rotor for an electric motor used as a rotary drive source for machine tools and other industrial equipment.

[0002]

2. Description of the Related Art A conventional method of manufacturing a permanent magnet rotor of this type will be described with reference to FIG. To construct the permanent magnet rotor 11 as shown in the figure, the yoke 14
The adhesive was uniformly applied to the outer peripheral surface of the above, and the permanent magnet pieces 12 were sequentially arranged at predetermined positions on the outer peripheral surface of the yoke, and then the adhesive was cured by heating. In addition, 15 is a rotor shaft. Although not shown, the outer circumference of the permanent magnet piece is wound with a glass fiber material impregnated with a thermosetting resin (hereinafter referred to as a roving material) to prevent magnet scattering during high-speed rotation or sudden acceleration of the electric motor. It may be heat-cured.

[0003]

In such a conventional method for manufacturing a permanent magnet rotor, a large number of permanent magnet pieces 12 are sequentially arranged at predetermined positions on the outer peripheral surface of the yoke 14, which is extremely troublesome. Since this work is performed, and the roving material may be further wound and cured by heating, it takes a lot of man-hours and has a drawback that automation is difficult.

The present invention solves the above problems, and an object of the present invention is to provide a method for manufacturing a permanent magnet rotor in which a large number of permanent magnet pieces are efficiently mounted.

[0005]

In order to achieve the above object, the present invention provides a yoke in which a required number of permanent magnet pieces are temporarily fixed on a sheet or roving material in advance and an adhesive is uniformly applied. A permanent magnet rotor is manufactured by winding a permanent magnet piece together with a sheet or a roving material on the outer peripheral surface.

[0006]

According to the present invention, a required number of permanent magnet pieces are temporarily arranged at a predetermined position on the outer peripheral surface of the yoke by the above-mentioned method, and the roving material can be wound and cured at the same time.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. As shown in the figure, the required number of permanent magnet pieces 12 are temporarily fixed on the sheet or roving material 13 in advance, and the sheet or roving material is wound around the outer peripheral surface of the yoke 14 to which the adhesive is uniformly applied. Then, the permanent magnet piece 12 is arranged at a predetermined position, and the adhesive is heated and cured to form the permanent magnet rotor 11. The sheet 13 has a permanent magnet piece 12 in which an adhesive is heat-cured.
Is fixed and then removed. As described above, according to the embodiment of the present invention, the permanent magnet rotor can be manufactured with a great reduction in man-hours without any trouble. Further, since the permanent magnet pieces 12 can be freely arranged on the sheet or the roving material 13, it goes without saying that the permanent magnet pieces 12 can be arranged at an angle (skewed) easily.

[0008]

As is apparent from the above embodiments, according to the present invention, a large number of permanent magnet pieces or a plurality of permanent magnet pieces and a roving material can be simultaneously disposed at predetermined positions on the outer circumference of the yoke, which is extremely workable. It is possible to provide a method of manufacturing a permanent magnet rotor of an electric motor, which can be automated with good performance.

[Brief description of drawings]

FIG. 1 is an external perspective view illustrating a method for manufacturing a permanent magnet rotor of the present invention.

FIG. 2 is an external perspective view of a permanent magnet rotor.

[Explanation of symbols]

11 Permanent Magnet Rotor 12 Permanent Magnet Piece 13 Sheet or Thermosetting Resin Impregnated Glass Fiber Material (Roving Material) 14 Yoke

Claims (2)

[Claims] 1. A method of manufacturing a permanent magnet rotor of an electric motor, wherein a plurality of permanent magnet pieces are fixedly formed on an outer peripheral surface of a yoke, a required number of permanent magnet pieces are temporarily fixed on a sheet, and the sheet is permanently attached. A method for manufacturing a permanent magnet rotor, comprising winding a magnet piece around an outer peripheral surface of a yoke and disposing the permanent magnet piece at a desired fixing position. 2. The method for producing a permanent magnet rotor according to claim 1, wherein the sheet is a glass fiber material impregnated with a thermosetting resin.