| 主权项 |
1. Controller device for controlling a power converter device of an electrical generator during rotation of the electrical generator, the controller device comprising:
a feedback input for receiving a current feedback; a demand input for receiving a current demand, the currant demand comprising
a first, d-axis demand for a current on a d-axis defined by the direction of the rotor flux of the electrical generator anda second, q-axis demand for a current on a q-axis defined by the direction of a stator back electromotive force generated by a flux in the electrical generator; a signal converter configured for receiving an angle signal and in response hereto transposing the current feedback onto two axes of a rotating reference frame, wherein the rotation angle of the reference frame is defined by the angle signal, the two axes being the d-axis and the q-axis, and the transposing of the current feedback resulting in a d-axis feedback and a q-axis feedback; a current controller configured for matching the d-axis feedback to the d-axis demand and for matching the q-axis feedback to the q-axis demand, the current controller having a d-axis regulator receiving the d-axis feedback and the d-axis demand and providing in response hereto a d-axis response operative in reducing the difference between the d-axis feedback and the d-axis demand; an error unit for providing an error signal indicative of an angle error of the rotating reference frame on the basis of the d-axis response of the d-axis regulator, wherein the error unit comprises: an emf input for receiving an estimated stator back electromotive force signal indicative of a magnitude of an estimated stator back electromotive force; and a divider for providing the error signal by dividing the d-axis response or a quantity derived therefrom by the magnitude of the estimated stator back electromotive force. |
