| 摘要 |
PROBLEM TO BE SOLVED: To provide a control device for synchronous motor which improves the stability of the motor which has a difference in level of inductance on a d axis and a q axis viewed from stator winding, by means of a current controller of a single current amplifier. SOLUTION: This control device operates the operational angel of a current action point after a vector operation and the current amplitude from a d-axis amplitude command value and a q-axis current command value, at the time of current control of such a motor that the inductance changes in the rotational direction, and multiplies current gain by coefficients geared to the operational angle and the current amplitude for compensation. Since the current gain is actively changed according to the change of the action point in current control, a delay in current pursuit does not occur and excellent controllability is obtained. |
