Rotor for electric motor, electric supercharger, and electric-motor assisted supercharger
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United States of America Patent
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May 22, 2018
Issued Date -
N/A
app pub date -
Dec 3, 2015
filing date -
Dec 5, 2014
priority date (Note) -
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Abstract
A rotor for an electric motor and a rotor sub-assembly that is maintained at an appropriate position without using a spacer and without applying excessive compressive stress to a magnet. A magnet and an end-plate are press-fitted into a ring-shaped member to form a rotor sub-assembly. A shaft is passed through the rotor sub-assembly. A fastener is fastened onto the shaft, and fixes the axial position of the rotor sub-assembly with respect to the shaft. The shaft includes a step at which the shape of the shaft changes between a small-diameter portion and a large-diameter portion.
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