| 摘要 |
A method for sensorless estimation of rotor speed and position of a permanent magnet synchronous machine the method comprising the steps of calculating first stator flux vector estimate (È d , i + jÈ q , i ) using the flux model and measured stator currents, calculating second stator flux vector estimate (È d,u + jÈ q,u ) using the voltage model and measured stator voltages, comparing the directions of the first and second flux vectors to achieve a first error signal ( F µ ), using speed adaptation to achieve estimates for the rotor angular speed (É m ) and angular position (¸ m ) from the first error signal ( F µ ), injecting a known voltage signal ( u c ) to the stator voltage, detecting a current signal ( i qc ) from the stator current to form a second error (µ) signal, which is dependent on the estimation error of the rotor position, augmenting the voltage model by the second error signal (µ) to keep the first and second flux vector estimates aligned and so to correct the rotor angular speed (É m ) and angular position (¸ m ) estimates. |
