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Bulletin of the Polish Academy of Sciences Technical Sciences

The Journal of Polish Academy of Sciences

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Simple speed sensorless DTC-SVM scheme for induction motor drives

H. Abu-Rub1 / 2 / M.P. Kazmierkowski3

1Texas A&M University at Qatar, Doha 23874, Qatar

2Electrotechnical Institute, 28 Pożaryskiego St., 04-703 Warsaw, Poland

3Institute of Control and Industrial Electronics, Warsaw University of Technology, 75 Koszykowa St., 00-662 Warsaw, Poland

This content is open access.

Citation Information: Bulletin of the Polish Academy of Sciences: Technical Sciences. Volume 61, Issue 2, Pages 301–307, ISSN (Print) 0239-7528, DOI: https://doi.org/10.2478/bpasts-2013-0028, August 2013

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The paper focuses on the development of a novel DSP based high performance speed sensorless control scheme for PWM voltage source inverter fed induction motor drives. Firstly, two generic torque and flux control methods the Field Oriented Control (FOC) and Direct Torque Control (DTC), are briefly described. For implementation the sensorless scheme DTC with Space Vector Modulation (DTCSVM) has been selected because it eliminates the disadvantages associated with the DTC while keeping the advantages of both FOC and DTC. Secondly, the simple flux vector observer allowing speed sensor elimination is given. The novelty of the presented system lays in combining the DTC-SVM structure with a simple observer for both torque/flux and speed sensorless control. Furthermore, the DTC-SVM structure which operates in speed sensorless and torque control mode is presented. Finally, the description of a 50 kW laboratory drive and experimental results illustrating properties of the system are given.

Keywords : speed sensorless control; pulse width modulated (PWM) voltage source inverters; induction motor drives; direct torque control (DTC); DTC-SVM; adjustable speed drives (ASD)

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