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Squirrel-cage rotor of induction motor and production method thereof wherein end ring is brazed with bar

一种鼠笼式转子、感应电动机的技术，应用在鼠笼式转子领域，能够解决手工作业工序增加、工时增多、供给等问题

Active Publication Date: 2014-02-12
FANUC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In methods such as Japanese Patent Application Laid-Open No. 2004-254433 and Japanese Patent Application Laid-Open No. 8-294256, there is a problem that the man-hours before brazing such as the processing of solder and the arrangement of solder are increased.
On the other hand, in the method of Japanese Patent Application Laid-Open No. 4-222446, there is a problem that the brazing material needs to be continuously supplied during the brazing operation, and the manual work steps are increased, and the man-hours are increased.

Method used

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  • Squirrel-cage rotor of induction motor and production method thereof wherein end ring is brazed with bar
  • Squirrel-cage rotor of induction motor and production method thereof wherein end ring is brazed with bar
  • Squirrel-cage rotor of induction motor and production method thereof wherein end ring is brazed with bar

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Embodiment Construction

[0019] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0020] figure 1 It is a schematic configuration diagram showing the squirrel-cage rotor 10 of the induction motor of the present invention, and shows a cross-sectional view in the direction of the rotation axis of the rotor. The squirrel-cage rotor 10 has: a rotor core 12 made of silicon steel sheet, and end rings 14 made of pure copper or copper alloy arranged at both ends of the rotor core 12 in the direction of the rotation axis, and configured to be inserted into the rotor iron core 12. One or more conductor bars (rotor bars) 20 made of pure copper or copper alloy formed in the through hole 16 on the core 12 and the through groove 18 on the end ring 14, and a clamp 22 for fixing the above-mentioned components.

[0021] The shape of the through-slot 18 formed on the end ring 14 is substantially complementary to the outer shape of the conductor bar 20. In the example...

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PUM

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Abstract

A squirrel-cage rotor of an induction motor and a production method thereof, wherein locating of the brazing material is not necessary in order to reduce manhours for brazing, and a bar is easily connected to an end ring. Before assembling a rotor core, a silver plated layer is formed on at least one of an end ring and a conductive bar. In order to melt the silver plated layer, the rotor is heated to a temperature which is equal to or larger than the melting point of the silver plated layer. The melted layer functions as a brazing material, whereby the end ring and the conductive bar are connected.

Description

technical field [0001] The present invention relates to a squirrel-cage rotor of an induction motor in which end rings and rods are brazed, and a method for manufacturing the squirrel-cage rotor. Background technique [0002] In general, the squirrel-cage rotor of an induction motor is mainly composed of three elements, namely: a laminated body of an iron core punched from an electrical steel sheet, slot conductors arranged in a plurality of slots provided on the iron core, and end rings on both ends of the rotor for short-circuiting the slot conductors. Among them, the slot conductors and the end rings are generally molded by die-casting, in which aluminum and the rotor core are integrally cast, mainly from the viewpoint of manufacturing cost and material cost. [0003] In recent years, lower heat generation of electric motors has been demanded, and copper or copper alloys having lower electrical resistance than aluminum are sometimes used as the metal of the rotor conduct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K17/16H02K1/22H02K15/02
CPCH02K17/165H02K15/0012Y10T29/49012H02K17/20
Inventor 早樋大辅福田正干前田尚志
Owner FANUC LTD