| 摘要 |
PROBLEM TO BE SOLVED: To facilitate auto-tuning of the parameters of a flux model, where the magnetic saturation characteristics including interference between d and q axes of the controller for a permanent magnet synchronous motor are taken into account, and to allow for highly accurate torque control of the permanent magnet synchronous motor based on this flux model.SOLUTION: The controller for a permanent magnet synchronous motor includes means for controlling the d-axis current DC component to a command value, means for applying a sine wave AC voltage to the d-axis, Fourier coefficients calculation means for of the d-axis current, means for calculating the Fourier coefficients of the d-axis flux fundamental wave component from Fourier coefficients calculation means of the q-axis voltage and the angular frequency of the AC voltage, means for operating the Fourier coefficients of the d-axis DC component, and means for determining first through fourth parameters from the q-axis current fundamental wave component, the Fourier coefficients of the third harmonic component, the DC component of the d-axis current, the Fourier coefficients of the second harmonic component, the Fourier coefficients of the q-axis flux fundamental wave component, and the Fourier coefficients of the d-axis flux DC component. A flux model is constituted using these parameters. |
