High conductivity rotor cage for line start permanent magnet motor
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United States of America Patent
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Apr 11, 2017
Grant Date -
Oct 22, 2015
app pub date -
Apr 22, 2014
filing date -
Apr 22, 2014
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Abstract
A method for synchronizing a high inertial load with a line-start synchronous motor involves providing a rotor core with rotor bars being formed of a highly conductive material. In accordance with one aspect of the method, a user is directed to operatively couple a load to the motor and drive the load from start to at least near synchronous speed during steady state operation of the motor with the load coupled thereto. The load has an inertia that is greater than an inertia associated with a load driven by a like motor subjected to an equivalent range of starting current but having rotor bars formed from a conductive material having a conductivity lower than that the highly conductive material.
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