Motor control device

A motor control device that controls an n-phase motor, the motor control device comprising:

• a power conversion circuit that is connected to the n-phase motor and performs mutual conversion between DC power and n-phase AC power;
• and
• a control unit that controls the power conversion circuit based on n-phase duty command values updated at a predetermined update cycle, wherein
• when the control unit predicts, based on the n-phase duty command values, that voltage fluctuations of at least two-phase connection terminals among the n-phase connection terminals connected to the n-phase motor occur in a same direction and at a same timing, the control unit delays an occurrence timing of the voltage fluctuation of one connection terminal of the two-phase connection terminals by a first time and advances an occurrence timing of the voltage fluctuation of another connection terminal by a second time, and
• a total value of the first time and the second time is a predetermined time during which predetermined occurrence timings of the voltage fluctuations of the two-phase connection terminals do not overlap each other.