| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a control device for a synchronous motor that can precisely correct the displacement of a rotational position related to a rotational position detector even in a state that a load is connected to a rotor while dispensing with a non-load detector and a motor voltage detector. <P>SOLUTION: The control device for the synchronous motor corrects the displacement of the rotational position related to the rotational position detector of the vector-controlled synchronous motor. The device comprises a current value generator that neglects a torque command when a phase correction command is inputted, and makes a d-axis current command and a q-axis current command zero, respectively, a current controller that outputs d-axis/q-axis voltage commands based on the d-axis/q-axis current commands, a phase correction amount detector that obtains an offset volume that makes the d-axis voltage command zero when it is not zero when the phase correction command is inputted, an adder that adds a rotor positional angle and the offset volume, and a voltage converter that obtains a three-phase voltage command based on the added value and the d-axis/q-axis voltage commands. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
