Two back-EMF-based position observers are compared for motion-sensorless synchronous reluctance motor drives. The reduced-order observer is of the second order, and the adaptive full-order observer is of the fourth order. The proposed design rules guarantee the stability of the adaptive full-order observer, if the parameter estimates are accurate. 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 second-order observer is easier, but the adaptive full-order observer is more robust against parameter variations and spatial harmonics.
|Title of host publication||Symposium on Sensorless Control for Electrical Drives (SLED)|
|Place of Publication||Birmingham, UK|
|Publication status||Published - 1 Sep 2011|
|MoE publication type||A4 Article in a conference publication|