| 摘要 |
A method in connection with a synchronous machine, the method comprising the steps of determining phase currents (iu, iv, iw) of a stator in the synchronous machine, determining phase voltages (uu, uv, uw) of a stator in the synchronous machine and estimating a position angle (gamma). The method also comprises the steps of generating estimates for stator flux vector components (psiialpha, psiibeta) of the determined phase currents (iu, iv, iw) of the stator and the estimated rotor angle (gamma) using a current model (2) of the synchronous machine, generating estimates for the stator flux vector components (psiialpha, psiibeta), comparing the generated stator flux vector estimates (psiialpha, psiibeta; psialpha, psibeta) with the phase difference of the estimates in order to achieve a proportional quantity, and adjusting the estimate (gamma) of the rotor position angle on the basis of the quantity proportional to the phase difference. |
