| 摘要 |
The present invention addresses the problem of providing: a motor control device which uses a one shunt-type current detection circuit to detect motor current and with which unpleasant phenomena do not take place and current command value and duty command value fluctuations do not occur even if a duty fluctuation caused by a PWM phase shift occurs at the moment of the PWM phase shift; and an electric power steering device using the same. The motor control device is equipped with: a comparison unit to which the one shunt-type current detection circuit is connected at a power source side or a ground side of an inverter and which determines a magnitude relationship by comparing duty command values; a timing control unit which sequentially starts up the timing of PWM signal rises or falls in a prescribed sequence on the basis of the magnitude relationship; and a motor angle output unit with which the order of the rises is changed in accordance with a prescribed algorithm, said motor angle output unit estimating a motor angle estimated value on the basis of past values of a rotation sensor only with respect to the timing in which the order of the rises has been changed and outputting the motor angle estimated value as the motor angle. |
