Title :
Speed sensorless variable structure torque control of induction motor
Author_Institution :
Univ. of Maribor, Maribor
Abstract :
Induction motor speed sensorless torque control, which allows operation at low and zero speed, optimizing both torque response and efficiency, is proposed. The control is quite different than the conventional field-oriented or direct torque control. A new discontinuous stator current FPGA based controller and rotor flux observer based on sliding mode and Lyapunov theory are developed analyzed and experimentally verified. A smooth transition into the field weakening region and the full utilization of the inverter current and voltage capability are possible. The reference tracking performance of speed and rotor flux is demonstrated in terms of transient characteristics by experimental results.
Keywords :
Lyapunov methods; field programmable gate arrays; induction motors; machine control; observers; torque control; variable structure systems; velocity control; Lyapunov theory; conventional field-oriented torque control; direct torque control; discontinuous stator current FPGA based controller; induction motor; rotor flux observer; sliding mode control; speed sensorless variable structure torque control; torque response; Control systems; Current control; Field programmable gate arrays; Induction motors; Mathematical model; Power electronics; Pulse width modulation inverters; Rotors; Sliding mode control; Torque control;
Conference_Titel :
Industrial Technology, 2009. ICIT 2009. IEEE International Conference on
Conference_Location :
Gippsland, VIC
Print_ISBN :
978-1-4244-3506-7
Electronic_ISBN :
978-1-4244-3507-4
DOI :
10.1109/ICIT.2009.4939526
