| 摘要 |
<p>PURPOSE:To control the tension between stands with good accuracy by decomposing the primary current of an induction motor to the current in the direction of a magnetic flux intersecting secondary conductors and the current in the direction intersecting orthogonally therewith and calculating rolling torque from the generated torque and the number of revolution calculated from each command value. CONSTITUTION:Primary current flows in the primary conductors 10, 11 of an induction motor, and secondary conductors 12, 13 present in the rotating magnetic flux by the conductors 10, 11. A magnetic flux 14 intersects secondary conductors 12, 13. The flux 14 is designated as psi2, the direction psi2 as a d-axis, the direction advanced by pi/2 from said axis as a q-axis, the d-axis component of the primary current as i1d, and the q- axis component as i1q. If the command value of the d-axis component is designated as i1d* and the command value of the q-axis component as i1q*, the generated torque TM is controlled by the equation I and the rolling torque G is determined by the equation II. In the equations I , II, N is the number of revolution of the induction motor; T2 is the secondary time constant of the induction motor; K, M, K1, K2, K3 are constants; S is the slave operator. The tension between the stands is controlled by using such rolling torque G.</p> |
