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Rotor core manufacturing method and rotor core

The technology of a rotor core and manufacturing method is applied to the rotor core and the manufacturing field, and can solve the problems of poor productivity and the like

Inactive Publication Date: 2019-07-30
AISIN AW CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this case, it is necessary to perform welding in a state where the laminated electrical steel sheets are arranged in a dedicated chamber, so the productivity is poor.

Method used

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  • Rotor core manufacturing method and rotor core
  • Rotor core manufacturing method and rotor core
  • Rotor core manufacturing method and rotor core

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Embodiment Construction

[0020] Embodiments of a rotor including a rotor core will be described with reference to the drawings. The rotor 100 of the present embodiment is provided, for example, in a rotating electrical machine used as a driving force source for wheels in a hybrid vehicle, an electric vehicle, or the like. The rotating electric machine includes a stator fixed to a non-rotating member, and a rotor 100 radially adjacent to the stator and rotatably supported. The rotor 100 of the present embodiment is configured as an inner rotor arranged radially inward of a stator.

[0021] Such as figure 1 As shown, the rotor 100 includes a rotor core 1 and a permanent magnet 30 embedded in the rotor core 1 . That is, the rotor 100 of the present embodiment is configured as a permanent magnet embedded type rotor.

[0022] The rotor core 1 is composed of a plurality of electromagnetic steel sheets 20 stacked in the axial direction A. As shown in FIG. The electromagnetic steel sheet 20 is formed in a...

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PUM

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Abstract

This method for manufacturing a rotary electric machine rotor core, comprises: a layering step for layering a plurality of electromagnetic steel sheets (20) so as to form a through hole (H) by connecting respective hole portions of the electromagnetic steel sheets to one another; and a welding step for welding the inner surface of the through hole (H) in the layering direction (A) in a state wherethe through hole (H) is filled with an inert gas (G).

Description

technical field [0001] The present invention relates to a rotor core for a rotating electrical machine and a manufacturing method thereof. Background technique [0002] A rotor core used in a rotating electrical machine is often composed of a plurality of electromagnetic steel sheets laminated in the axial direction. Japanese Unexamined Patent Application Publication No. 2002-209345 (Patent Document 1) discloses that when manufacturing a rotor core configured in this way, laser welding is performed on the outer peripheral surfaces of a plurality of electromagnetic steel sheets in a stacked state to form a plurality of electromagnetic steel sheets into one another. One. Using laser welding can simplify the manufacturing process and shorten the manufacturing time. [0003] However, usually in laser welding, plume generation is often a problem. Regarding this point, Japanese Patent Application Laid-Open No. 2012-179615 (Patent Document 2) discloses a technique of performing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K15/02H02K1/18
CPCH02K1/18H02K15/02H02K15/03H02K1/276B23K26/21B23K2101/36
Inventor 池本正幸牛田英晴穴井岳洋
Owner AISIN AW CO LTD