Cuong Dinh Tran and Khoa Dang Tran Phan 2026. ANALYSIS OF VOLTAGE MODEL-BASED ROTOR FLUX ESTIMATION FOR CLOSED-LOOP CONTROL METHODS WITHOUT SPEED ENCODER. HUIT Journal of Science. 26, 2 (Apr. 2026), 54–66. DOI:https://doi.org/10.62985/j.huit_ojs.vol26.no2.409.