Title :
Sensorless vector control in the presence of voltage and current measurement errors by dead-time [induction motors]
Author :
Hur, Namho ; Hong, Kichul ; Nam, Kwanghee
Author_Institution :
Dept. of Electr. Eng., Postech Univ., Pohang, South Korea
Abstract :
A sensorless vector control scheme for induction motors is proposed in the presence of voltage and current measurement error caused by dead-time. To overcome the pure integrator problem, the authors modified the stator flux observer through the injection of the current observation error so that poles lie in the left half complex plane. Further, upper bounds of the observation error and the speed estimation error are derived in the presence of voltage and current measurement errors. Experimental results show that the proposed scheme yields fairly good dynamic and steady-state performances irrespective of applied load torque at low speed
Keywords :
control system analysis; control system synthesis; induction motors; machine control; machine testing; machine theory; stators; velocity control; control design; control simulation; current measurement errors; dead-time effects; dynamic performance; induction motors; observation error; sensorless vector control scheme; speed estimation error; stator flux observer; steady-state performance; voltage measurement errors; Current measurement; Error correction; Estimation error; Induction motors; Machine vector control; Stators; Steady-state; Torque; Upper bound; Voltage;
Conference_Titel :
Industry Applications Conference, 1997. Thirty-Second IAS Annual Meeting, IAS '97., Conference Record of the 1997 IEEE
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-4067-1
DOI :
10.1109/IAS.1997.643059
