ROTATING ELECTRICAL MACHINE
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United States of America Patent
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Issued Date -
Mar 17, 2016
app pub date -
Jan 22, 2014
filing date -
Mar 27, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A rotating electrical machine includes: a stator that includes a cylindrical inner hole; and a rotor that includes a rotation shaft being concentric with the inner hole of the stator and whose outer peripheral surface faces an inner peripheral surface of the inner hole across a predetermined gap, wherein a rotor core that is provided around the rotation shaft is divided into a plurality of portions in an axis direction thereof, and, inside each of rotor cores that are created by the division, a plurality of ventilation holes are formed around the rotation shaft in such a way as to pass therethrough in an axis direction thereof, and a spacer is provided between end surfaces of the rotor cores, and a duct is formed in such a way as to extend from the ventilation holes to the gap with the inner peripheral surface of the inner hole of the stator.
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