Electric motor control device
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United States of America Patent
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Mar 15, 2016
Grant Date -
Apr 2, 2015
app pub date -
Feb 4, 2013
filing date -
Feb 28, 2012
priority date (Note) -
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Abstract
An electric motor control device is capable of reducing vibration in a speed fluctuation range at a high frequency. The electric motor control device includes a target rotation speed setting unit that sets the target rotation speed of an electric motor, a rotation speed estimation unit that calculates an estimated rotation speed of the electric motor, and a drive command signal generation unit that generates a drive command signal for the electric motor so as to eliminate a rotation speed difference between the target rotation speed and the estimated rotation speed. The rotation speed estimation unit includes an error calculation unit that calculates an error related to rotation of the electric motor and an estimated corrected rotation speed calculation unit that calculates an estimated corrected rotation speed by taking the error as input and correcting the estimated rotation speed.
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