Motor controlling apparatus
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United States of America Patent
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May 12, 2015
Grant Date -
Jun 6, 2013
app pub date -
Sep 7, 2011
filing date -
Sep 28, 2010
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A motor controlling apparatus including an inverter, a voltage detector, a rotational speed detector, a command value calculating component, an inverter controller, a state detector and an offsetting component. The inverter converts direct-current power to alternating-current power supplied to a motor. The voltage detector detects a direct-current voltage, and the rotational speed detector detects a rotational speed of the motor. The calculating component calculates current and torque command values, and motor rotational speed. The controller provides a control signal to control the inverter based on the current command value. The state detector detects a control state of the inverter, and the offsetting component offsets the detected voltage or rotational speed by an offset amount. The calculating component modifies the current command value based on the offset detected voltage or rotational speed to increase on a negative side a d-axis current command value included in the current command value.
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