Title :
A novel stator resistance estimation method for speed-sensorless induction motor drives
Author :
Guidi, Giuseppe ; Umi, Hidetoshi
Author_Institution :
Fuji Electr. Corp. Res. & Dev. Ltd., Tokyo, Japan
Abstract :
A method for online estimation of the stator resistance of an induction machine is presented and a speed-sensorless field-oriented drive equipped with the proposed estimator is built. The drive is particularly suitable for low-speed operation. Resistance estimation is based on a two-time-scale approach, and the error between measured and observed current is used for parameter tuning. The simple full-order observer in use allows for direct field orientation in a wide range of operation. The system can drive active load and generate stall torque, as confirmed by numerical simulations and experimental tests on a general-purpose 7.5 kW induction machine.
Keywords :
induction motor drives; machine vector control; observers; parameter estimation; stators; torque; 7.5 kW; active load; direct field orientation; full-order observer; induction motor drive; low-speed operation; measured current; observed current; parameter tuning; speed-sensorless field-oriented drive; speed-sensorless induction motor drives; stall torque generation; stator resistance estimation method; two-time-scale approach; vector control; Electrical resistance measurement; Induction machines; Induction motor drives; Machine vector control; Mechanical sensors; Rotors; Sensor systems and applications; Sensorless control; Stators; Torque control;
Journal_Title :
Industry Applications, IEEE Transactions on
