| 摘要 |
In the present invention, nonlinear functions between magnetic flux and current of a synchronous motor are prepared. Moreover, axis-error estimation calculation expressions, where magnetic-flux saturation characteristic is taken into consideration, are derived from these nonlinear functions via expression modification. Then, these calculation expressions derived are executed. This process makes it possible to provide a control apparatus for allowing the position/speed sensorless control to be implemented merely by setting several parameters with respect to the synchronous motor as well. Here, in the synchronous motor, the magnetic-flux saturation is conspicuous, and there exist large number of inter-axes cross-coupling magnetic fluxes. |
