Decoupled PWM Based Direct Torque Control of Four Level Inverter Fed Open End Winding Induction Motor Drive

Satheesh G^1, , T Bramhananda Reddy² and CH Sai Babu²

¹Electrical and Electronics Engineering Department, G.Pulla Reddy Engineering College, Kurnool, India

²Electrical and Electronics Engineering Department, University college of Engineering Kakinada, JNTUK, Kakinada, India

Cite this paper:
Satheesh G, T Bramhananda Reddy and CH Sai Babu. Decoupled PWM Based Direct Torque Control of Four Level Inverter Fed Open End Winding Induction Motor Drive. Journal of Automation and Control. 2015; 3(1):18-24. doi: 10.12691/automation-3-1-3

Abstract

A direct torque control (DTC) of open end winding induction motor (OEWIM) with decoupled PWM is proposed in this present paper. In this approach the four level voltages are generated by two conventional two level inverters which are fed with the unequal dc link voltages. These two inverters are feeding the induction motor from either ends. However, the proposed DTC scheme does not require the sector information of the estimated fundamental stator voltage vector and its relative position with respect to the stator flux vector. Simulation results clearly demonstrate a better dynamic and simplicity in numerical calculations of the proposed method.

Keywords:
decoupled SVPWM Algorithm DTC four level SVPWM Multilevel Inverters OEWIM zero sequence voltages

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References:

[1]	Joohn-Sheok Kim and Seung-Ki Sul, “A novel voltage modulation technique of the space vector PWM”, in Conf. Rec. IPEC’95, Yokohama, Japan, 1995, pp. 742-747.
[2]	E. G. Shivakumar, K.Gopakumar, S.K. Sinha, Andre Pittet, V.T. Ranganathan, “Space Vector Control of Dual Inverter Fed Open-end Winding Induction Motor Drive”, EPE Journal, Vol. 12, No. 1, pp. 9-18 (2002).
[3]	H.Stemmler, P. Guggenbach, “Configurations of High-Power Voltage Source Inverter Drives”, Proc. EPE Conf., pp. 7-14, (1993).
[4]	M. R. Baiju, K. Gopakumar, K. K. Mohapatra, V. T.Somasekhar, L. Umanand, “Five-level inverter voltage space phasor generation for an open-end winding induction motor drive”, IEE Proc. on Electric Power Applications, Vol. 150, No. 5, pp. 531-538, (2003).
[5]	M. R. Baiju, K. Gopakumar, K.K. Mohapatra, V. T.Somasekhar L. Umanand, “A high resolution multilevel voltage space phasor generation for an open-end winding induction motor drive”, EPE Journal, Vol. 13, No. 4, pp. 29-37, (2003).
[6]	B. Venugopal Reddy, V.T.Somasekhar, Y. Kalyan, “Decoupled Space-Vector PWM strategies for a Four-Level Asymmetrical Open-End Winding Induction Motor Drive With waveform Symmetries” IEEE TRANS on INDUSTRIAL ELECTRONICS, VOL. 58, NO. 11, NOVEMBER 2011 pp. 5130-5141.
[7]	G.Satheesh, T. Bramhananda Reddy and Ch. SaiBabu, “Novel SVPWM Algorithm for Open end Winding Induction Motor Drive Using the Concept of Imaginary switching Times” IJAST, Vol. 2, No. 4, 2011, pp 44-92.
[8]	Arbind Kumar, B.G. Fernandes and K. Chatterjee, “Direct Torque Control of Open-end Winding Induction Motor Drive Using the Concept of Imaginary Switching Times for Marine Propulsion Systems”, IEEE, pp. 1504-1509.
[9]	S. Srinivas and V.T. Somasekhar, “Space-vector-based PWM switching strategies for a three-level dual-inverter-fed open-end winding induction motor drive and their comparative evaluation” IEEE Trans, IET Electr. Power Appl., 2008, 2, (1), pp. 19-31.
[10]	G. Buja, D. Casadei, and G. Serra, “Direct stator flux and torque control of an induction motor: theoretical analysis and experimental results,” in Proc. 24th Annu. Conf. IEEE Ind. Electron. Soc., Aachen, Germany, Sep. 31, 1998, vol. 1, pp. T50-T64.
[11]	J. Quan and J.Holtz, “Sensorless vector control of induction motors at very low speed using a nonlinear inverter model and parameter identification,” IEEE Trans. Ind. Appl., vol. 38, no. 4, pp. 1087-1095, Aug. 2002.
[12]	Arhind Kurnar, BG Fernandes, K Chatterjee. “Simplified Hybrid SVM Based Direct Torque Control of Thee Phase Induction Motor,” National conference on CClS 2W. Goa (India) Vol. l, pp 137-142. 2004.
[13]	Arbind Kumar, BG Fernandes, K Chatterjee, “Direct Torque Control of Three Phase Induction Motor Using SVPWM With-out Sector and Angle Determination”, EPE-PEMC 2004, Paper No. A-71121.
[14]	Arbind Kumar, BG Fernandes, K Chatterjee, “DTC of Open-End Winding Induction Motor Drive Using Space Vector Modulation With Reduced Switching Frequency,” IEEE-PESC, 2004, pp 1214-1219.
[15]	G.Satheesh, T. Bramhananda Reddy and Ch. Sai Babu, “DTC of Open End Winding Induction Motor fed by Two Space-Vector-Modulated Inverters”, IEEE-INDICON, 2011.
[16]	G.satheesh, T. Bramhananda reddy and CH. Sai babu. “Space-vector based pwm switching strategy for a four-level dual inverter fed open-end winding induction motor drive”, ICAESM-2012, India, pp: 111-115.