| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce the interference between an electrical system and a mechanical system and stabilize the control when a permanent-magnet synchronous motor is driven. <P>SOLUTION: A stabilizer controller converts the detected current values iu and iw of the permanent-magnet synchronous motor 4 which is V/f-controlled through an inverter circuit 3 into the current components iγ and iδ of orthogonal γ- and δ-axes of rotating coordinates which rotate with a frequency command value ω* using a coordinate transformation device 52, and feeds the product of iδ and a proportional gain Kl back to a γ-axis voltage command vγ and the product of iγ and the proportional gain Kl back to a δ-axis voltage command vδ. By providing the stabilized controller, the natural frequency of the electrical system is increased to reduce its interference with the natural frequency of the mechanical system, and thus control is stabilized. <P>COPYRIGHT: (C)2004,JPO |
