| 摘要 |
A method and a system in connection with a speed and position sensorless permanent magnet synchronous machine equipped with an output filter (26) and driven by an inverter (29), which method comprises the steps of forming a speed-adaptive full-order observer (25) based on the dynamic model of the combination of the permanent magnet synchronous machine (PMSM) and the output filter (26), measuring the inverter output current (i A ), estimating inverter output current ( i A ), determining the estimate for the electrical angular speed (É m ) using the estimated and measured inverter output currents ( i A , i A ) in an adaptation law, injecting a voltage signal (u c ) into the inverter voltage reference ( u A, ref 0 ) to obtain a modified voltage reference ( u A , ref ), detecting an error signal (µ) from the measured inverter output current ( i A ), and calculating the speed correction term (É µ ) used in the adaptation of the observer from the error signal (µ). |
