A Neuro-Fuzzy Direct Torque Control Using Bus-Clamped Space Vector Modulation

ABSTRACT

This paper presents proportional integral direct torque control (PIDTC) and neuro-fuzzy-based DTC (NFDTC) using bus-clamped space vector modulation for two-level inverter. The PIDTC provides more ripples in flux, speed, and torque during speed/load changing conditions, and also gives more total harmonic distortion (THD) in current of the induction motor (IM). In order to improve the dynamic and the ripple performance of IM drive, the NFDTC is used in which the PI-controllers (speed and torque) are replaced with neuro-fuzzy controls using hybrid learning algorithm. The hybrid algorithm divides into two parts such as back propagation and least square estimation methods to improve the controller performance. Also, the duty ratios are controlled as independent of sampling time to improve the gating pulse of the inverter. A prototype IM drive is developed with a DSPACE DS-1104 controller to validate their simulated performance. The experimental results show that the NFDTC has less current THD than PIDTC leading to significant improvement in torque and flux ripples with fast dynamic response of IM drive.

KEYWORDS:

• bus-clamped space vector modulation
• induction motor
• neuro fuzzy control
• proportional integral direct torque control
• voltage source inverter

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Notes on contributors

N. Venkataramana Naik

N. Venkataramana Naik received the BTech degree in electrical and electronics engineering from SK University, Anantapur, India, 2006 and the MTech degree in power electronics from JNTU Anantapur, India, 2009. Now he is pursuing PhD at Indian Institute of Technology Roorkee, India. He is a student member of IEEE and IES. His interested research areas are pulse width modulation techniques, power electronic control of induction motor drive, multi-level inverters, and their applications of an artificial intelligence.

E-mail: [email protected]

Jose Thankachan

Jose Thankachan was born in Thiruvalla, Kerala, India in 1987. He received the BTech degree in electrical and electronics engineering from the Govt. Engineering College, Thrissur, Kerala affiliated to the University of Calicut, Kerala, India in the year 2009, and MTech degree in Power Electronics from National Institute of Technology, Calicut, Kerala in the year 2012. He is presently working towards a doctorate in philosophy in the area of electrical drives and power electronics in Department of Electrical Engineering, Indian Institute of Technology, Roorkee, India. His research interests include linear induction motors and electric vehicles.

E-mail: [email protected]

S. P. Singh

S.P. Singh received the BSc degree in Electrical Engineering from Aligarh Muslim University, Aligarh, India, in 1978. He also obtained ME and PhD degrees from Indian Institute of Technology Roorkee, India in 1980 and 1993, respectively. He is currently working as a professor and a chair professor at Rural Electric Corporation in the Department of Electrical Engineering, Indian Institute of Technology Roorkee, India. He has authored more than 100 technical articles and has presented in various forums. His current research interests include power converters and control for drives applications, active power filters for power quality improvements, renewable energy systems, self and line excited induction generators for variable speed power applications.

E-mail: [email protected]