SENSORLESS MOTOR DRIVE VECTOR CONTROL WITH FEEDBACK COMPENSATION FOR FILTER CAPACITOR CURRENT
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United States of America Patent
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Issued Date -
Jun 16, 2016
app pub date -
Feb 25, 2016
filing date -
Jan 16, 2013
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
Disclosed examples include methods, computer readable mediums and motor drives power conversion systems for sensorless speed control of a motor driven by an inverter through an intervening filter, in which a controller computes motor current feedback values for a current control cycle according to inverter output current values, capacitance values representing capacitances of filter capacitors of the filter, filter output voltage values representing output voltages of the filter, and a speed feedback or reference value of a previous control cycle. The controller computes a speed feedback value for the current control cycle according to the motor current feedback values and the filter output voltage values, and controls the inverter to regulate the rotational speed of the motor at least partially according to the speed feedback or reference value using vector control.
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