Improved Weighting Factor Selection for Predictive Torque Control of Induction Motor Drive Based on a Simple Additive Weighting Method

Abstract

A predictive torque control (PTC) technique is emerging as an effective alternative for induction motor drives because of its simple structure, ability to include control parameters directly into the cost function, and fast dynamic response. To implement PTC for induction motor drive, both stator flux and torque errors are predicted for each switching state of the converter and the combined error is determined with the help of cost function using a suitable stator flux weighting factor. However, the selection of suitable weighting factor is a tedious and complex task. In this paper, a simple additive weighting method is introduced in the cost function optimization to simplify the weighting factor selection process. To observe the effectiveness of the proposed control algorithm, both simulation and experimental results are presented for a two-level voltage-source-inverter-fed induction motor drive and compared with conventional PTC under various operating conditions. The proposed control technique achieves low-torque ripple along with reduced switching frequency.

Keywords::

• induction motor drive
• predictive torque control
• simple additive weighting method
• torque ripple
• weighting factor selection

Additional information

Notes on contributors

Vishnu Prasad Muddineni

Vishnu Prasad Muddineni received B.Tech degree in electrical and electronics engineering from Jawaharlal Nehru Technological University, Hyderabad, India, in 2007 and M.Tech degree in power electronics and drives from SRM University, Chennai, India in 2010. He is currently working toward the Ph.D. in the Department of Electrical Engineering, National Institute of Technology, Warangal, India. His research interests include adjustable speed drives and predictive control techniques for power electronic applications.

Srinivasa Rao Sandepudi

Srinivasa Rao Sandepudi received the B. Tech. degree in electrical engineering from Regional Engineering College (REC), Warangal, India, in 1992 and M. Tech. degree from Regional Engineering College (REC), Calicut, India, in 1994 and the Ph.D. degree from National Institute of Technology (NIT), Warangal India in 2007. Since 1996, he is working as a faculty member at NIT, Warangal, India. He is a Life Fellow of Society of Power Engineers (SPE) India and Life Member of the System Society of India (SSI), Indian Society for Technical Education (ISTE), Institution of Engineers(India), Instrument Society of India (ISOI), International Association of Engineers (IAENG) and also Senior Member of IEEE (SM' 2016). His research interests include power electronic drives, switch mode power converters, DSP controlled drives and renewable energy systems.

Anil Kumar Bonala

Anil Kumar Bonala received his B. Tech degree in electrical and electronics engineering and M.Tech degree in power electronics from Jawaharlal Nehru Technological University, Hyderabad, India, in 2008 and 2011 respectively. He is currently working toward the Ph.D. degree at the Department of Electrical Engineering, National Institute of Technology, Warangal, India. His research interests include power electronics and its application to power systems, AC-DC drives, power quality and renewable energy systems.