MOTOR DRIVE SYSTEM AND METHOD
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United States of America Patent
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Issued Date -
Aug 15, 2019
app pub date -
Oct 20, 2017
filing date -
Oct 21, 2016
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Abstract
A water pumping system, a motor drive, and a method of starting pumping by the motor drive. The method includes powering the electric motor with a motor drive; driving a progressive cavity pump with the electric motor; monitoring a speed difference between an electrical speed and an observed speed of a rotor of the electric motor; and performing a protective action as a function of the speed difference.
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