Rotor for electric motor optimized for high power
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United States of America Patent
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Apr 16, 2013
Grant Date -
Apr 14, 2011
app pub date -
Sep 29, 2010
filing date -
Sep 30, 2009
priority date (Note) -
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Abstract
A rotor for a high power electric motor intended to operate at particularly high rotational speeds. It includes a magnetic mass, gripped on either side by short circuit rings, and passed through at a plurality of notches by main bars forming a squirrel cage. The rotor also includes secondary bars passing through the magnetic mass via notches. The shape and arrangement of each notch is defined so as to ensure contact between the main bars and the secondary bars sufficient to allow the passage of an electric current when the rotor is in rotation. In particular, the invention applies to asynchronous motors capable of operating at high peripheral speeds typically starting at 100 m·s−1, in particular motors intended for gas or oil applications, whether land-, sea-, or undersea-based.
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