Method of manufacturing armature coil
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United States of America Patent
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May 5, 2020
Grant Date -
Nov 9, 2017
app pub date -
Jun 30, 2017
filing date -
Apr 26, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
Provided is in an armature coil formed by arranging a plurality of coil conductors on a lower metal die having a tapered groove that is narrower toward an inner side. The coils are pressed using an upper metal die having an end portion narrower than the width of the groove. The coils are formed in a substantially trapezoidal shape which gets narrower toward the radially inner side and the cross-sectional areas of the plurality of the coil conductors in the slot are each substantially the same and the circumferential width thereof is formed narrower as the coil conductor is arranged toward the radially inner side; and one coil conductor is formed in a convex shape and another coil conductor is formed in a concave shape along the convex shape.
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