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Rotor and rotating electric machine with rotor

A technology for rotating electrical machines and rotors, which is used in motors, electric vehicles, magnetic circuit rotating parts, etc., can solve the problems of high supply risk, scarcity of heavy rare earths, uneven distribution of production areas, and achieve the effect of improving the anti-demagnetization force.

Active Publication Date: 2020-11-24
HITACHI ASTEMO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, heavy rare earths are rare and unevenly distributed, so the supply risk is high

Method used

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  • Rotor and rotating electric machine with rotor
  • Rotor and rotating electric machine with rotor
  • Rotor and rotating electric machine with rotor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A first embodiment of the present invention will be described. figure 1 It is a cross-sectional view of the rotating electrical machine according to the first embodiment of the present invention cut in the radial direction. The rotating electric machine 10 includes a rotor 100 , a shaft 101 fixed to the rotor 100 , and a stator 500 arranged around the rotor 100 . The rotating electrical machine 10 is mounted on vehicles such as a hybrid car or an electric car, for example, and has both a function as a motor that rotates the shaft 101 by being supplied with electric power and a function as a generator that generates electricity by the rotation of the shaft 101, and can be Each function can be switched and used according to the driving state.

[0025] The shaft 101 is a rod-shaped member penetrating through the center of the rotor 100 , is fixed to the rotor 100 , and rotates integrally with the rotor 100 . The rotor 100 includes a rotor core 102 formed by laminating a ...

Embodiment 2

[0048] Next, use Figure 4 as well as Figure 5 , the second embodiment of the present invention will be described. Figure 4 It is a partial enlarged view of the magnet housing part of the second embodiment of the present invention, showing the configuration of one pole in the rotor of the rotating electric machine. Figure 5 for Figure 4 Partial enlarged view of one side of the magnet housing in .

[0049] Permanent magnets 210 , 211 are housed in magnet housing portions 203 , 204 formed in rotor core 102 , respectively. A bridge 205 is provided between the magnet storage parts 203 and 204 . A virtual centerline 206 is provided at the center of the bridge 205 . The center line 206 is a line passing through the rotation center of the shaft 101 (rotor 100). The magnet housing portions 203 and 204 are formed line-symmetrically with respect to the center line 206 .

[0050] Surfaces 213a and 213b on the outer peripheral side of rotor core 102 in magnet accommodating port...

Embodiment 3

[0077] Next, use Figure 6 , the third embodiment of the present invention will be described. Figure 6 It is a partially enlarged view of a magnet housing portion according to a third embodiment of the present invention, showing the configuration of one pole of a rotor of a rotating electric machine. The difference from the second embodiment lies in the size of the magnet housing part 203a, the magnet housing part 204a, and the sizes of the permanent magnets 210a and 211a housed in them. The other configurations are the same as those of the second embodiment, so detailed descriptions will be omitted below.

[0078] exist Figure 6 Here, the dimensions (magnitude) in the direction of the center line 206 of the magnet housing portions 203a, 203b and the magnet housing portions 204a, 204b are set to be the same. In addition, the dimensions (magnitudes) in the direction perpendicular to the center line 206 of these permanent magnets are also set to be the same. Along with thi...

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PUM

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Abstract

Provided are a rotor designed to improve demagnetization resistance of a permanent magnet and to improve the performance of a motor by effectively utilizing the magnetic flux of the magnet, and a rotating electric machine that uses this rotor. A rotor accommodates a plurality of permanent magnets (110a, 110b) in one magnet storage portion (103) provided in a rotor core (102), wherein the pluralityof permanent magnets (110a, 110b) are arranged in such a manner that surfaces (113a, 113b) of the magnet storage portion (103) that are positioned on the outer peripheral side of the rotor core (102)form a step and that distances (D1 and D2 and distances P1 and P2) from an outer peripheral surface of the rotor core (102) are equal to each other.

Description

technical field [0001] The present invention relates to a rotor and a rotating electrical machine including the rotor. Background technique [0002] In the automotive industry, the transition from conventional internal combustion engine drive to electric motors that do not emit greenhouse gases during drive is progressing due to the increasing awareness of global environmental protection. As motors for automobiles, permanent magnet synchronous motors are mainly used in order to achieve high efficiency. As the permanent magnets, rare earth magnets that generate strong magnetic force are used. Rare-earth magnets have a weak point of being not heat-resistant, so heavy rare-earth magnets are added. However, heavy rare earths are rare and unevenly distributed in production areas, so the supply risk is high. Therefore, permanent magnet synchronous motors are required to reduce the amount of heavy rare earths used and to increase the anti-demagnetization force of the magnets. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27
CPCH02K1/27
Inventor 永田稔泽畠公则榎本裕治高桥晓史松延丰
Owner HITACHI ASTEMO LTD
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