Basket-type rotor production method and basket-type rotor
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United States of America Patent
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Oct 31, 2017
Grant Date -
Jun 9, 2016
app pub date -
Dec 15, 2014
filing date -
Dec 16, 2013
priority date (Note) -
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Abstract
A squirrel-cage rotor manufacturing method capable of suppressing, at the time of performing die-casting, formation of gaps between closing portions and a rotor core at radially outer parts of rotor slots, or generation of a thermal stress in the rotor core as a result of expansion of the closing portions. The squirrel-cage rotor manufacturing method includes: arranging, through die-casting, conductors into rotor slots that are formed along a radially outer part of a rotor core; and performing the die-casting under a state in which radially outer parts of the rotor slots are closed with closing portions made of the same material as a material of the rotor core.
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