TY - JOUR
T1 - Comparison of a reduced-order observer and a full-order observer for sensorless synchronous motor drives
AU - Tuovinen, Toni
AU - Hinkkanen, Marko
AU - Harnefors, Lennart
AU - Luomi, Jorma
PY - 2012/12/31
Y1 - 2012/12/31
N2 - Two back-electromotive-force-based position observers are compared for motion-sensorless synchronous motor drives: the reduced-order observer and the adaptive full-order observer. A stabilizing gain is proposed for the adaptive full-order observer, which guarantees the local stability of the closed-loop system, if the motor parameters are known. Equations for the steady-state position error and for the linearized estimation-error dynamics under erroneous parameters are derived, and the robustness of the two observers against parameter errors is analyzed and compared. The observers are experimentally evaluated using a 6.7-kW synchronous reluctance motor drive in low-speed operation and under parameter errors. The gain selection of the reduced-order observer is easier, but the adaptive full-order observer can be made more robust against parameter variations and noise.
AB - Two back-electromotive-force-based position observers are compared for motion-sensorless synchronous motor drives: the reduced-order observer and the adaptive full-order observer. A stabilizing gain is proposed for the adaptive full-order observer, which guarantees the local stability of the closed-loop system, if the motor parameters are known. Equations for the steady-state position error and for the linearized estimation-error dynamics under erroneous parameters are derived, and the robustness of the two observers against parameter errors is analyzed and compared. The observers are experimentally evaluated using a 6.7-kW synchronous reluctance motor drive in low-speed operation and under parameter errors. The gain selection of the reduced-order observer is easier, but the adaptive full-order observer can be made more robust against parameter variations and noise.
KW - observer
KW - parameter uncertainties
KW - permanent-magnet synchronous motor
KW - sensorless
KW - stability conditions
KW - synchronous reluctance motor
KW - observer
KW - parameter uncertainties
KW - permanent-magnet synchronous motor
KW - sensorless
KW - stability conditions
KW - synchronous reluctance motor
KW - observer
KW - parameter uncertainties
KW - permanent-magnet synchronous motor
KW - sensorless
KW - stability conditions
KW - synchronous reluctance motor
U2 - 10.1109/TIA.2012.2226200
DO - 10.1109/TIA.2012.2226200
M3 - Article
SN - 0093-9994
VL - 48
SP - 1959
EP - 1967
JO - IEEE Transactions on Industry Applications
JF - IEEE Transactions on Industry Applications
IS - 6
ER -