Original scientific paper

Speed Sensorless Variable Structure Torque Control of Induction Motor

Karel Jezernik ; Faculty of Electrical Engineering and Computer Science, University of Maribor, Maribor, Slovenia
Asif Šabanović orcid.org/0000-0002-2783-9354 ; Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey
Miran Rodič orcid.org/0000-0003-3949-1807 ; Faculty of Electrical Engineering and Computer Science, University of Maribor, Maribor, Slovenia

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 controls. 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

Discrete-event driven system; FPGA; Induction motors; Sliding mode control; Torque control

Hrčak ID:

51364

URI

https://hrcak.srce.hr/51364

Publication date:

22.3.2010.

Article data in other languages: croatian

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