Torque ripple suppression control device for permanent magnet motor and electric power steering system
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United States of America Patent
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Apr 2, 2013
Grant Date -
Jul 21, 2011
app pub date -
Jan 19, 2011
filing date -
Jan 19, 2010
priority date (Note) -
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Abstract
A torque ripple suppression control device for a permanent magnet motor includes a current command conversion unit that outputs a current command value, a position detector that detects a rotational position of the permanent magnet motor, a current detection unit that detects a current at the permanent magnet motor, an induced voltage coefficient setting unit that outputs an information signal related to an induced voltage coefficient for an induced voltage at the permanent magnet motor, a torque ripple suppression operation unit that outputs a current correction command value for the permanent magnet motor, a current control operation unit that outputs a voltage command value based upon addition results obtained by adding together the current command value and the current correction command value and the current detection value, and a power converter that outputs a voltage with which the permanent magnet motor is to be driven.
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