Control Apparatus of Electric Power Steering Apparatus
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United States of America Patent
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Issued Date -
Sep 4, 2008
app pub date -
Feb 21, 2005
filing date -
Feb 23, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention provides a control apparatus of a electric power steering apparatus which can suppress a vibration and a noise of a motor caused by a torque ripple which is generated at a tie of applying a field-weakening control to the motor or on the basis of a motor circulating current. Accordingly, the control apparatus actually measures a relation between a basic correcting current and a rotor position which can suppress the torque ripple generated at a time of applying the field-weakening control or the torque ripple based on the motor circulating current, previously, and adds a correcting current which is regulated by taking into consideration a magnitude of a weak field current of a correcting current, a magnitude of an angular velocity of the rotor or an electrical angle of the circulating current with respect to the basic correcting current, to an original current command value.
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