| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide the control device of a motor that can conduct N/S determination in a short time by suppressing a sound and vibration in the N/S determination at the time of a rotor stop, in a sensorless detection method of a rotor position. <P>SOLUTION: The control device of the motor is provided with an N/S determination means that detects a temporary d-axis phase angle θ0 from a separated superimposed current, conducts the N/S determination at the temporary d-axis phase angle θ0, and obtains a true d-axis phase angle θ from the temporary d-axis phase angle θ0. In the N/S determination means, the temporary d-axis phase angle θ0 is temporarily determined as a d-axis, a d-axis current is applied in a direction where a rotor is flipped with respect to the d-axis, the temporarily determined d-axis is determined as an actual d-axis when the rotor is flipped, and the temporary d-axis phase angle θ0 is outputted as the true d-axis phase angle θ. The control device of the motor monitors the movement of the rotor (change of a d-axis phase angle), and controls the rotor so as not to move in a degree that the rotor generates the sound and the vibration by lowering a current before the rotor generates the sound and the vibration, or by applying a code-inverted current. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
