Sensorless-Brushless Motor Control Device and Electric Fluid Pump Using the Same
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United States of America Patent
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N/A
Issued Date -
Sep 30, 2010
app pub date -
Mar 1, 2010
filing date -
Mar 26, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A sensorless-brushless motor control device comprises an inverter, an inverter drive circuit that drives the inverter and a current control part that controls the inverter drive circuit according to a current command from a superior control part and includes a first order lag compensating part. The device is characterized by further comprising a control mode changeover judging part that judges changeover of a control gain of the current control part after startup of the sensorless-brushless motor in response to a motor revolution sensing signal from the inverter drive circuit and a control mode changeover part that changes over the control gain of the current control part in response to an output of the control mode changeover judging part.
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