| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a control unit of an elevator that prevents the start of the elevator with a magnetic pole position displaced, and can constantly operate the elevator in a normal state. <P>SOLUTION: The control unit of the elevator comprises: current control means 12, 13 that control respective command values of a d-axis component of a stator winding current of a permanent magnet synchronous motor 1 and a q-axis component thereof so that the command values follow actual values on the basis of the difference of the actual values; an angular speed operation means 3 that detects the rotational angular speed of the permanent magnet synchronous motor 1 form an absolute position accompanied by the rotation of a rotor of the permanent magnet synchronous motor 1; a speed control means 5 that controls the rotational angular speed so that the rotational angular speed follows the command value on the basis of the difference between the command value of the rotational angular speed of the permanent magnet synchronous motor 1 and the rotational angular speed; and a d-axis magnetic pole phase correction means 18 that corrects a magnetic pole phase on the basis of a compensation voltage signal based on the current difference of a d-axis from the current control means 12. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
