Rotor apparatus and methods of improving magnetization in electric machines
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United States of America Patent
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May 5, 2015
Grant Date -
Apr 10, 2014
app pub date -
Oct 9, 2012
filing date -
Oct 9, 2012
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Induction motors may have a rotor that includes a shaft and a plurality of rotor laminations. The plurality of rotor laminations may have a central bore sized to receive the shaft, and the shaft may have a laminated portion that extends throughout the central bore. In other embodiments, the plurality of rotor laminations may have a very small or no central bore, and the shaft may include first and second end pieces respectively attached on opposite sides of the plurality of rotor laminations. In some embodiments, the first and second end shaft pieces may be attached to the rotor laminations with a through bolt that passes through the rotor laminations via a central bore sized no larger than needed to receive the through bolt, allowing each of the rotor laminations to have a larger laminated surface area. Methods of assembling a rotor are also provided, as are other aspects.
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