Improvement of Indirect Vector Control Induction Motor Drive Performance under Low Speed Operation using Five-Level Inverter

Autori

  • CH.V. Seshagiri Rao SNIST
  • P.S.R. Murthy SNIST
  • G Durgasukumar Vignan University, Guntur

Parole chiave:

Two-level inverter, Five-level inverter, Space vector modulation (SVM), Indirect vector control, Low speed, Induction motor drive.

Abstract

The dynamic performance of vector controlled induction motor drive is poor and peak motor torque decreases under low speed operation. This reduction in torque is due to the non-linearity of voltage to frequency (Hz) during low frequency operation. The non-linearity is caused by stator voltage drop which in turn requires a larger percentage of overall terminal voltage. To overcome these problems multilevel inverter fed induction motor drive is presented in this paper. For two-level and five-level inverter control SVM method is employed. A simplified space vector modulation technique is implemented for five-level inverter in order to reduce the computational difficulties. In this, the space vector diagram of the multilevel inverter is decomposed into six space vector diagrams of two-level inverters. The torque ripple and dynamic performance of induction motor drive are compared under different operating conditions with low speed operation.

Biografie autore

  • CH.V. Seshagiri Rao, SNIST
    CH.V. Sesha GiriRao was born in prakasam district on 3rd march 1977.He did B.Tech (EEE) from  Bapatla engineering college in 1999, M.Tech (power Electronics) from Jawaharlal Nehru Technological University College of Engineering, Hyderabad in 2004. He has twelve years of teaching experience. Presently he is working as Associate professor in sreenidhi institute of technology and science. His research interest includes power electronics, applications of power electronics in power systems and FACTS.
  • P.S.R. Murthy, SNIST
    Dr.P.S.R. Murty received Doctorate from Technical University Berlin (Germany), with specialization in power system and control. He is presently the Director, School of Electrical Engineering, Sreenidhi Institute of Science and Technology, Hyderabad, Andhra Pradesh, India. His areas of Interests are Distribution Automation, Smart Grids, and Power Quality
  • G Durgasukumar, Vignan University, Guntur
    Dr. G.Durgasukumar received Bachelor’s and Master’s degrees in Electrical Engineering from J.N.T.U, Hyderabad (India) and   Ph.D. from Indian Institute of Technology, Roorkee, India. His research interests include power electronics and electric drives, machines. 

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Pubblicato

2013-08-22

Fascicolo

V. 3 N. 2 (2013)

Sezione

Research Articles

Licenza

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