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Rotor and motor

A technology of rotor and rotor core, which is applied to rotating parts of magnetic circuit, synchronous motors with stationary armatures and rotating magnets, electromechanical devices, etc. To achieve the effect of increasing the motor torque

Pending Publication Date: 2020-08-11
NIDEC TECHNO MOTOR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the permanent-magnet-excited rotor disclosed in JP-A-2000-156946, since the inner corner of the permanent magnet contacts the laminated iron core in the radial and circumferential directions, part of the magnetic flux generated from the vicinity of the corner may Loops around corners, or flows inward
Therefore, the amount of magnetic flux flowing to the outer stator side is reduced, and the induced voltage for generating torque of the motor may be reduced.

Method used

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  • Rotor and motor
  • Rotor and motor
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Examples

Experimental program
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Effect test

no. 1 Embodiment approach ＞

[0023]

[0024] figure 1 It is a vertical sectional view of the motor 1 of the first embodiment. The motor 1 is used in home appliances such as air conditioners and washing machines, for example. However, the motor 1 of the present invention can also be used for applications other than home electric appliances. For example, the motor 1 of the present invention may be mounted on transportation equipment such as automobiles and railcars, OA equipment, medical equipment, tools, large industrial equipment, etc., to generate various driving forces.

[0025] This motor 1 is a so-called inner rotor type motor in which a rotor 32 is disposed radially inside of a stator 21 . Such as figure 1 As shown, the motor 1 has a stationary part 2 , a rotating part 3 , an upper bearing part 71 and a lower bearing part 72 . The stationary unit 2 is fixed to the housing of the device on which the motor 1 is mounted. The rotating part 3 is supported so as to be rotatable about the center axis...

no. 2 Embodiment approach ＞

[0054] Next, a second embodiment of the present invention will be described. In addition, the following description will focus on differences from the first embodiment, and redundant description of the same parts as in the first embodiment will be omitted.

[0055] Figure 6 It is a plan view of the rotor 32B of the second embodiment. But when Figure 6 In , the illustration of the resin part is omitted. Figure 7 It is a partial plan view of the rotor 32B of the second embodiment. Such as Figure 6 and Figure 7 As shown, the rotor 32B has a rotor core 321B, a plurality (ten in this embodiment) of magnets 322B, and a resin portion. But when Figure 6 and Figure 7 In , the illustration of the resin part is omitted.

[0056] The rotor core 321B has an inner core portion 50B, a plurality (ten in this embodiment) of core magnetic pole portions 51B, a circumferential connection portion 52B, and a plurality (ten in this embodiment) of radial connection portions. part 53B...

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Abstract

Rotor and motor. The rotor includes: a plurality of magnets arranged in a circumferential direction around a central axis; and a rotor iron core comprising a magnetic body. The rotor core includes: aplurality of fan-shaped iron core magnetic pole portions arranged in a circumferential direction around a central axis; a circumferential connecting part which expands in a circular ring shape aroundthe central axis on the radial inner side of the iron core magnetic pole portions and the magnets; a plurality of radial connecting parts connecting the iron core magnetic pole portions and the circumferential connecting part in the radial direction; and a plurality of protrusions protruding in the circumferential direction from each of the radial connecting parts on the outer side in the radial direction of the circumferential connecting part and on the inner side in the radial direction of the iron core magnetic pole portions. Each magnet is housed in a magnet insertion space provided between adjacent iron core magnetic pole portions. The protrusions are in contact with radial inner surfaces of the magnets. The rotor core further includes a circumferential gap portion surrounded by the iron core magnetic pole portions, the radial connecting parts, the protrusions, and the magnets. When viewed in the axial direction, a corner portion of the radial inner side of the circumferential side surface of each magnet faces the circumferential gap portion.

Description

technical field [0001] The invention relates to rotors and motors. Background technique [0002] Conventionally, there is known a so-called spoke-type rotor structure in which a pair of magnetic pole surfaces of permanent magnets are arranged such that they respectively face the circumferential direction. For example, such a rotor is disclosed in Japanese Patent Application Laid-Open No. 2000-156946. [0003] A conventional permanent magnet field rotor as described in Japanese Patent Laid-Open No. 2000-156946 includes a laminated iron core, which is an annular connecting portion surrounding a rotating shaft, and fan-shaped magnetic poles connected to the connecting portion via the connecting portion. formed integrally; and a square permanent magnet disposed between the magnetic pole portions. The laminated iron core has an inner flange abutting on an inner corner of the permanent magnet, and an outer flange abutting on an outer corner of the permanent magnet. The permanen...

Claims

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Application Information

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IPC IPC(8): H02K1/27H02K3/34H02K5/04H02K7/00
CPCH02K1/276H02K1/2773H02K3/345H02K5/04H02K7/003H02K7/083H02K21/14H02K2213/03
Inventor 川岛丈典石川将之安田智史井尻贵哉
Owner NIDEC TECHNO MOTOR CORP
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