This paper presents a novel sensorless discrete sliding-mode (SM) stator flux and torque controller for three-phase Induction motor drive which is supplied by a three level SVM voltage source inverter (VSI). The stator flux is estimated by a sliding-mode observer and is employed in the rotor speed and stator resistance estimation. In the proposed method the motor iron losses is modeled by a rotor speed dependent shunt resistance in IM two axis equivalent circuits. The system efficiency is optimized by adjusting the magnitude of stator flux reference value for a given motor load and motor speed. To do so, two different methods named as Model Based Approach (MBA) and On-line Search Approach (OSA) are adopted. Finally, some simulation results are presented to show the capability and validity of the proposed control scheme.
|Title of host publication||IEEE International Conference on Industrial Technology, 2008. ICIT 2008.|
|Number of pages||6|
|Publication status||Published - 21 Apr 2008|
|Event||IEEE ICIT 2008 - Chengdu, China, United Kingdom|
Duration: 21 Apr 2008 → 24 Apr 2008
|Conference||IEEE ICIT 2008|
|Period||21/04/08 → 24/04/08|