Motor control device
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United States of America Patent
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Mar 10, 2015
Grant Date -
Oct 3, 2013
app pub date -
Mar 7, 2013
filing date -
Mar 30, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A motor control device includes a torque computing section which computes an output torque of an electric motor which is capable of generating magnetic torque by permanent magnets and reluctance torque, a flux weakening angle computing section which determines an angle of a flux weakening current vector that is added to a reference current vector so that a command torque value and the computed torque value correspond with each other, a voltage acquiring section which acquires a terminal voltage of the motor, a flux weakening amplitude computing section which determines an amplitude of the flux weakening current vector so that the terminal voltage of the motor is not more than a maximum voltage applicable to the motor, and a command current computing section which computes a command current vector by adding the flux weakening current vector to the reference current vector.
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