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Permanent magnet rotor

一种永磁转子、永磁体的技术，应用在磁路转动零部件、磁路、磁路形状/式样/结构等方向，能够解决工序繁琐等问题，达到防止破损、形状简单、组装工序简便的效果

Inactive Publication Date: 2013-04-03
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve this problem, a method of inserting a buffer member such as rubber instead of a metal cotter pin to reduce vibration was conceived, but it was difficult to press into the groove due to the high friction of rubber, so there were the following problems: It is necessary to apply external force to the rubber to insert it while elastically deforming, and the process becomes cumbersome.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0038] figure 1 It is a perspective view showing the permanent magnet rotor 1 of the present invention. The rotor 1 has a structure in which a rotor core 2 is fitted and fixed to a rotating shaft 3 . The rotor core 2 is formed by laminating sheets of magnetic material such as silicon steel sheets punched out by dies, and a plurality of permanent magnets for embedding permanent magnets are formed at equal intervals parallel to the shaft 3 at a position close to the outer periphery. Magnet embedding groove (hereinafter also simply referred to as magnet embedding groove or groove) 4 .

[0039] figure 2 It is a detailed view of the peripheral portion of the magnet embedding groove 4 . The magnet embedding groove 4 is made up of a rectangular magnet accommodating portion 4a matching the shape of the magnet and an accommodating portion 4b such as a cushioning member connected to the magnet accommodating portion 4a substantially in the center of the long side of the magnet accomm...

Embodiment approach 2

[0045] Figure 4 ~ Fig. 6 shows embodiment 2 of the present invention, for and figure 1 The elements that are the same as those in Fig. 3 are denoted by the same symbols. The permanent magnet rotor of the second embodiment is different from the first embodiment in the biasing member. Such as Figure 4 As shown, the magnet embedding groove 4 of the permanent magnet rotor according to Embodiment 2 consists of a rectangular magnet housing portion 4a matching the shape of the magnet 7 and is connected to the magnet housing portion 4a approximately at the center of the long side of the magnet housing portion 4a. The housing part 4c of a rectangular buffer member etc. is comprised, and the magnet housing part 4a and the housing part 4c of a buffer member etc. are formed simultaneously by punching. Although the accommodating part 4c of a buffer member etc. has a rectangular shape, of course, it can also be formed in the shape with a step like Embodiment 1. As shown in FIG. The wi...

Embodiment approach 3

[0051] Figure 7 8 and 8 show the periphery of the magnet embedding groove of the permanent magnet rotor according to the third embodiment. In Embodiment 1 and Embodiment 2, the cushioning member 8 and the biasing member 9 or the biasing member 9a are different members. When assembling, after the cushioning member 8 is inserted, the biasing member 9 or the biasing member 9a is inserted. . On the other hand, in the third embodiment, the buffer urging member 11 is used. The buffer urging member 11 is made by bonding the flat-plate-shaped buffer member 8 and the cotter pin made of resin or metal using an adhesive 10 in advance. The component 9 is formed as a one-piece component. Since the other configurations are the same as those in Embodiment 1 or Embodiment 2, corresponding elements are given the same reference numerals and descriptions thereof are omitted. Although in Figure 7 Although the buffer urging member 11 is formed by using the cotter pin-shaped urging member 9 a...

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PUM

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Abstract

A permanent magnet rotor is capable of not only preventing damage on a permanent magnet by reducing resonance even when the magnet resonates under a vibration condition, but also enhancing mass-productivity. A permanent magnet rotor (1) includes: a rotor core (2) of a laminated structure about a rotation shaft (3); a plurality of permanent magnet embedment slots (4) provided to the rotor core (2) at equally spaced positions from the rotation shaft (3); and permanent magnets (7) inserted into the respective permanent magnet embedment slots. The permanent magnet embedment slots (4) each have a magnet storing portion (4a) and a buffer and other members storing portion (4b) continuing to the magnet storing portion. One permanent magnet is stored in the magnet storing portion and a buffer member (8) and a pushing member (9) used to fix the permanent magnet (7) are stored in the buffer and other members storing portion.

Description

technical field [0001] The present invention relates to a permanent magnet rotor (hereinafter also simply referred to as a rotor) configured by inserting permanent magnets (hereinafter also simply referred to as magnets) in a rotor of an electric motor. Background technique [0002] As a method of inserting and fixing magnets into the inner groove of the motor rotor to obtain a permanent magnet rotor, it is conceivable to fix the magnet by applying an adhesive such as epoxy resin between the inner groove and the permanent magnet and curing it Methods. However, in this method, a thermal curing step is required in order to cure the adhesive, so there is room for improvement in terms of mass productivity. As an alternative method, a method has been proposed in which a groove is provided in the inner peripheral portion of the inner groove, and a cotter pin made of metal for fixing the magnet is inserted into the groove portion after the magnet is inserted into the groove, there...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27
CPCH02K1/276H02K1/28
Inventor 中村成志横田博久冈本省吾井上正哉
Owner MITSUBISHI ELECTRIC CORP
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