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

A squirrel-cage rotor and induction motor technology, which is applied in the field of squirrel-cage rotors, can solve the problems of increased working hours, manual work procedures, and increased working hours, etc.

Active Publication Date: 2012-09-19
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 accompanying drawings.

[0020] figure 1 It is a schematic structural diagram showing the squirrel-cage rotor 10 of the induction motor of the present invention, and shows a cross-sectional view of the rotor in the direction of the rotation axis. The squirrel-cage rotor 10 includes a rotor iron core 12 made of silicon steel sheets, and end rings 14 made of pure copper or a copper alloy disposed at both ends of the rotor iron core 12 in the rotational axis direction, and formed so as to be inserted into the rotor iron. One or more conductor bars (rotor bars) 20 made of pure copper or copper alloy formed in the through holes 16 in the core 12 and the through grooves 18 in the end ring 14, and a jig 22 for fixing the above components.

[0021] The shape of the through groove 18 formed in the end ring 14 is substantially complementary to the outer shape of the conductor bar 20. In the...

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Abstract

The present invention relates to a squirrel-cage rotor of an induction motor and a production method thereof, wherein an end ring is brazed with a bar. An object of the present invention is to provide 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, 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] Generally, a squirrel-cage rotor of an induction motor is mainly composed of three elements, namely: a laminated body of an iron core punched from electromagnetic steel sheets, slot conductors arranged in a plurality of slot holes provided in the iron core, and end rings for short-circuiting the slot conductors on both end faces of the rotor. Among them, the slot conductors and the end rings are generally formed by die-casting in which aluminum and the rotor core are integrally formed from the viewpoints of manufacturing cost and material cost. [0003] In recent years, reduction in heat generation of the motor has been demanded, and copper or a copper alloy having a lower electrical resistance than aluminum is sometimes used as the metal of the rotor ...

Claims

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Application Information

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