| 摘要 |
In the rectangular-wave voltage control mode, torque feedback control, in which the voltage phase (□v) of the rectangular-wave voltage is adjusted based on the deviation of the torque estimated value (Trq) from the torque command value (Trqcom), is performed. A torque estimation portion (420) calculates the torque estimated value (Trq) using the motor currents (Id, Iq) calculated based on the values detected by a current sensor (24) and a rotational position sensor (25), as in the case of the PWM control mode. Namely, the same state quantity (quantity detected by the sensors) of the alternating-current motor (M1) is used in the motor control in both the rectangular-wave voltage control mode and the PWM control mode.
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