Improved Performance and Power Quality of Direct Torque Control of Asynchronous Motor by Using Intelligent Controllers

Abstract

Direct torque control of asynchronous motors has good dynamic performance of torque and flux. However, the use of hysteresis controllers leads to a variable switching frequency. This lack of control over frequency is the origin of torque and flux ripples. To overcome these problems, this article proposes modified fuzzy direct torque control for an induction motor. In addition, a three-phase pulse width modulation rectifier controlled by the fuzzy direct power control is used. This rectifier draws a sinusoidal current from the grid and operates with a power factor close to unity. The pulse width modulation rectifier feeds the inverter of the direct torque control, ensuring a speed control loop. The proposed direct torque control–direct power control method is investigated based on theoretical analysis, computer simulation, and experimental validation that provide acceptable results.

Keywords:

• direct torque control
• pulse width modulation rectifier
• direct power control
• fuzzy logic control
• power factor

Additional information

Notes on contributors

Oualid Aissa

Oualid Aissa received his Licence and Master degrees in electrical engineering from University of Sétif 1, Algeria, in 2010 and 2012, respectively. He is currently working toward his Ph.D. in the Department of Electrical Engineering and Informatics at the University of Médéa, Algeria. He is a member of the LREA. His current research interests include analysis and control of power electronic converters and their applications, electrical drives, power quality, and artificial intelligence.

Samir Moulahoum

Samir Moulahoum was born in Algiers in 1971. He received his Engineer degree in electrical machines in 1995, his Magister degree in electrical engineering in 1998, and his Doctorate in power electronics and drives in 2006 from University of Sciences and Technology of Algiers University of Sciences and Technology Houari Boumdeiene, Algiers, Algeria. He was with the Research Group in Electrotechnical and Electronics of Nancy laboratory, University of Henri Poincaré, Nancy, France, as an invited researcher for 2 years. He worked in the National Electricity and Gas Company as a studies engineer for 2 years. He is presently an associate professor in the Department of Electrical Engineering at University of Médéa. His research interests are electric machines, power electronics, control of electrical drives, DSP implementation, power generation, and power quality.

Ilhami Colak

Ilhami Colak was born in 1962 in Turkey. He received his diploma in electrical engineering from Gazi University, Turkey, in 1985; his M.Sc. in electrical engineering in the field of speed control of wound rotor induction machines using semiconductor devices at Gazi University in 1991; his M.Phil. at Birmingham University in England by preparing a thesis on high-frequency resonant DC-link inverters in 1991; and his Ph.D. at Aston University in England on mixed frequency testing of induction machines using inverters in 1994. He became an assistant professor, an associate professor, and a full professor in 1995, 1999, and 2005, respectively. He has published more than 206 papers in different subjects, including electrical machines, drive systems, machine learning, reactive power compensation, inverters, converters, artificial neural networks, distance learning automation, and alternating energy sources. More than 80 of his papers have been cited in Science Citation Index and have received more than 363 citations. He supervised 19 M.Sc. students and 12 Ph.D. students. He is a member of the IEEE, IES, IAS, PELS, and PES. He also spent around 3 years at European Commission Research Centre (JRC) in The Netherlands. He currently holds the positions of Vice Rector and Dean of Engineering and Architecture Faculty of Istanbul Gelisim University. For the last 10 years, his studies have concentrated on renewable energy and smart grids by publishing papers in journals (www.ijre.org) and organizing international IEEE sponsored conferences (www.icrera.org).

Nadir Kabache

Nadir Kabache received the Engineer, Magister, and Doctorate degrees in electrical engineering in 1997, 2001, and 2007, respectively, from M’hamed Bouguerra University of Boumerdès. He is currently an associate professor in Electrical Engineering Department at University of Médéa. He has been director of the Research Laboratory LREA in University of Médéa since 2010. His research interests include electric machines and variable-speed drives.

Badreddine Babes

Badreddine Babes received his M.S. in 2010 from the Department of Electrical Engineering, University of Sétif 1, Algeria. He is currently working toward his Ph.D. He is a member of the LAS Laboratory, University of Setif 1. His main research interests are electrical drives, power quality, and renewable energy.