| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a torque controller of a permanent magnet synchronous motor which can achieve high accurate torque control for all speed ranges from a low speed range to a high speed range. <P>SOLUTION: A second current command value of the d and q axes is calculated so that a current detection value of d/q d and q axes of a rotational coordinate system agrees with a current command value of the first d axis and the q axis given from the host. In accordance with the second current command value of the d and q axes, output voltage of a power converter is made controllable. Consequently, the controller of the AC motor which can achieve high accurate torque control can be constituted. <P>COPYRIGHT: (C)2008,JPO&INPIT |
