Speed-Sensorless DTC of a Matrix Converter Fed Induction Motor Using an Adaptive Flux Observer

ABSTRACT

This paper aims at combining some of the best features of an available induction motor (IM) drive system while introducing a simplified adaptive flux estimation algorithm for sensorless operation. The use of a matrix converter (MC) is proposed to achieve improved source side power quality and input power factor correction of an IM drive. Direct torque control (DTC) of an IM is realized through appropriate switching of the MC and the control strategy is implemented with speed-sensorless operation by using a relatively simplified adaptive flux observer. DTC through speed and flux estimation is realized in the stationary reference frame. Primarily, three objectives are achieved, viz. speed regulation while directly controlling the motor torque (and flux), improved source side power quality owing to the use of MC, and substantially simplified sensorless estimation strategy. Additionally, economic benefits are also achieved owing to negligible energy storage requirements of the drive and sensorless operation.

KEYWORDS:

• Adaptive flux observer
• direct torque control (DTC)
• induction motor (IM)
• matrix converter (MC)
• power quality
• sensorless

Additional information

Notes on contributors

Tabish Nazir Mir

Tabish Nazir Mir was born in Srinagar, Jammu and Kashmir, India, in 1991. She received the B.Tech. degree in electrical engineering from NIT Srinagar in 2014. In 2016 she joined as a research scholar at IIT Delhi under the Trainee Teacher Scheme of NIT Srinagar. She is currently pursuing her doctoral studies on matrix converter fed induction motor drives. Her research interests include power electronics, electrical drives, matrix converters, and power quality.

Bhim Singh

Bhim Singh was born in Rahamapur, Bijnor, UP, India, in 1956. He received the B.E. degree in electrical from the University of Roorkee, Roorkee, India, in 1977, and the M.Tech. degree in power apparatus and systems and the Ph.D. degree in electrical machine from Indian Institute of Technology (IIT) Delhi, New Delhi, India, in 1979 and 1983, respectively. In 1983, he joined the Department of Electrical Engineering, University of Roorkee (now IIT Roorkee), as a Lecturer. He became a Reader there in 1988. In December 1990, he joined the Department of Electrical Engineering, IIT Delhi, as an Assistant Professor, where he has become an Associate Professor in 1994 and a Professor in 1997. He has been the Head in the Department of Electrical Engineering, IIT Delhi, from July 2014 to August 2016. He is currently the Dean, Academics with IIT Delhi. He has guided 68 Ph.D. dissertations, 161 M.E./M.Tech./M.S.(R) thesis. He has executed more than 75 sponsored and consultancy projects. His areas of research interests include PV grid interface systems, microgrid, power quality, PV water pumping systems, power electronics, electrical machines, drives, FACTS, and HVDC systems. Email: [email protected]

Abdul Hamid Bhat

Abdul Hamid Bhat was born in Srinagar, Jammu and Kashmir, India. He completed the B. Tech degree in electrical engineering from NIT Srinagar (Then REC) in 1992. Thereafter, he did his M. Tech in power electronics, machines and drives from IIT Roorkee in 2001, and further PhD from the same institute in 2007. He is currently a Professor at the Department of Electrical Engineering, NIT Srinagar. His research interests include power electronics, electrical drives, high power converters, FACTS, and power quality. Email: [email protected]