Method and apparatus for manufacturing stator coil for electric rotating machine
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United States of America Patent
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Sep 9, 2014
Grant Date -
Jul 21, 2011
app pub date -
Jan 14, 2011
filing date -
Jan 15, 2010
priority date (Note) -
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Abstract
A method of manufacturing a stator coil for an electric rotating machine includes the steps of: (1) forming substantially planar electric wires each of which includes in-slot portions to be received in slots of a stator core and turn portions to be located outside the slots to connect adjacent pairs of the in-slot portions; (2) rolling each of the planar electric wires through plastic deformation into a spiral or circular-arc shape; and (3) assembling the rolled electric wires together to form the stator coil. Further, in the rolling step, each of the planar electric wires is rolled by deforming each of the turn portions of the electric wire while restricting movement of at least one of the in-slot portions of the electric wire which is located closer to a rolling start end of the electric wire than the turn portion is.
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