METHOD AND SYSTEM FOR MEASURING A PARAMETER OF MOTOR OPERATION
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United States of America Patent
Stats
-
Oct 1, 2002
Grant Date -
Oct 17, 2002
app pub date -
Feb 13, 2001
filing date -
Feb 13, 2001
priority date (Note) -
Granted
status (Latency Note)
Importance
Abstract
A method of reconnecting a motor to a motor drive comprises controlling a current which flows through the motor using a current regulator. The current regulator produces a voltage command output based on a current command input. A current is commanded at the current command input of the current regulator. Back EMF measurements are acquired at different instants in time by monitoring the voltage command output of the current regulator. Back EMF phase angles are determined for a plurality of the instants in time based on a respective plurality of the back EMF measurements. A frequency of the back EMF is determined based on the back EMF angles determined for the plurality of instants in time. The motor drive is reconnected to the motor based on the frequency of the back EMF.
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