| 摘要 |
Determination of an estimated initial angular position of the rotor of an AC motor includes application of voltages corresponding to a high frequency reference signal vector (u*?ß_HF) to the stator windings (106) of the motor and production of an estimated initial angular position ?AXIS, ?INIT of the rotor as a function of the resulting q-axis stator current component iq_HF, adjustment of transformation of signal vectors from stationary to rotating coordinates and vice versa using the estimated angular position ?AXIS, ?INIT, and production of an adjusted estimated angular position ?AXIS, ?INIT of the rotor as a function of the q-axis stator current component iq_HF as adjusted. Determination of an initial estimated angular position ?AXIS, ?INIT of the rotor and production of an adjusted initial estimated angular position ?AXIS, ?INIT of the rotor is performed with the rotor (104) at standstill and before initially applying voltage corresponding to the drive signal vector u*?ß to the stator windings (106), and production of an initial value of a drive signal vector command u*?ß in stationary coordinates uses the adjusted estimated angular position. Determination of an estimated angular position of the rotor after application of stator current may use a different method, such as a physical relative position sensor. |
