Abstract: A polyphase electric motor control device stores a first threshold as a duty cycle at which noise caused by a high potential-side switching element starts to overlap a first measurement period, and a second threshold as a duty cycle at which time when a low potential-side switching element is switched from on to off is after an end of a second measurement period, makes a first judgment for comparing a maximum target duty cycle with the first threshold, and a second judgment for comparing a second greatest target duty cycle with the second threshold, measures a current in the first measurement period when the maximum target duty cycle is smaller than the first threshold, and measures a current in the second measurement period when the maximum target duty cycle is greater than the first threshold and the second greatest target duty cycle is smaller than the second threshold.

Abstract: A polyphase electric motor control device stores a first threshold as a duty cycle at which noise caused by a high potential-side switching element starts to overlap a first measurement period, and a second threshold as a duty cycle at which time when a low potential-side switching element is switched from on to off is after an end of a second measurement period, makes a first judgment for comparing a maximum target duty cycle with the first threshold, and a second judgment for comparing a second greatest target duty cycle with the second threshold, measures a current in the first measurement period when the maximum target duty cycle is smaller than the first threshold, and measures a current in the second measurement period when the maximum target duty cycle is greater than the first threshold and the second greatest target duty cycle is smaller than the second threshold.

Abstract: A steering control device has a filter section configured to remove a high frequency component from an output of a torque sensor configured to detect a steering torque of a steering device mounted on a vehicle, a current command section configured to output a current command value based on a travelling speed of the vehicle and an output of the filter section, a drive control section configured to control a drive of a motor configured to aid a steering of the steering device based on the current command value, and a drive prohibiting section configured to output a signal for prohibiting the drive of the motor to the drive control section based on the output of the torque sensor, the current command value, and the travelling speed of the vehicle.

Abstract: A steering control device has a filter section configured to remove a high frequency component from an output of a torque sensor configured to detect a steering torque of a steering device mounted on a vehicle, a current command section configured to output a current command value based on a travelling speed of the vehicle and an output of the filter section, a drive control section configured to control a drive of a motor configured to aid a steering of the steering device based on the current command value, and a drive prohibiting section configured to output a signal for prohibiting the drive of the motor to the drive control section based on the output of the torque sensor, the current command value, and the travelling speed of the vehicle.