Sanden Corporation

Yushi Araki

Tatsuki Kashihara

The invention provides an inverter device which effectively cancels the generation of common mode noise associated with dead-time effects and misjudgement of the polarity of a phase current at switching in the case where a fluctuation in a neutral point potential of a motor is suppressed by canceling a change in a phase voltage with another change in the phase voltage. A phase voltage command operation unitof a control device includes a phase current prediction partwhich predicts a phase current at a switching timing of each phase, and a correction control partwhich corrects a switching operation so as to cancel a change in the phase voltage applied to the motor with another change in the phase voltage, based on the phase current of each phase at the switching timing predicted by the phase current prediction part

Inverter device

There is provided a motor control device which enables torque ripple suppressing control high in followability by executing direct voltage control. A motor control device includes a voltage command calculation unitwhich calculates a d-axis voltage command value Vand a q-axis voltage command value Vfrom a d-axis current command value i* and a q-axis current command value i* of a motor, a feed forward command value calculation unitwhich calculates a qi-axis voltage feed forward command value V* for generating a q-axis current ripple on the basis of spatial harmonic parameters and the frequency characteristics of a motor winding, and a subtraction unitwhich subtracts the q-axis voltage feed forward command value V* calculated by the feed forward command value calculation unitfrom the q-axis voltage command value Vcalculated by the voltage command calculation unit

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Isesaki, Japan

Yushi Araki