Method of attaching a rotor to a shaft
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United States of America Patent
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N/A
Issued Date -
Jan 6, 2005
app pub date -
May 19, 2003
filing date -
May 19, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method of attaching a rotor to a shaft is provided to obtain increased motor performance. The increased motor performance is obtained as a result of a high impedance gap that is formed between the rotor bars and the rotor core during the heat shrinking operation to attach the rotor to a shaft. In the heat shrinking operation, the rotor is heated to between 600-800.degree. F. At this temperature the aluminum in the rotor bars expands faster than the steel in the rotor core and causes a deforming or yielding of one or both of the materials. As a result of this deformation of the material, the cooling of the rotor results in the formation of a gap between the rotor bars and the rotor core that operates as a high impedance barrier between the rotor bars and rotor core.
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