Committee Chair

Eltom, Ahmed Hassan

Committee Member

Parten, Clifford; Sartipi, Mina

Department

Dept. of Electrical Engineering

College

College of Engineering and Computer Science

Publisher

University of Tennessee at Chattanooga

Place of Publication

Chattanooga (Tenn.)

Abstract

This paper presents a comparison of three-phase induction motor performance subjected to frequency, voltage and load changes by Square wave inverter and Pulse Width Modulated (PWM) inverter. A computer program which is backed by a laboratory study is used to characterize the motor performance during the comparison. A 1 hp induction motor is tested by a Square wave and a PWM inverter and the motor performance data including various harmonic losses at 30 Hz, 40 Hz and at 60 Hz are measured. An advanced electrical model that accounts for the skin effect in the rotor bar to predict motor impedance is used to predict motor performance and calculate motor losses. The laboratory and calculated data are compared. Various performance characteristics of the induction motor are plotted. The result of this study showed that the induction motor efficiency decreased significantly as the operating frequency decreased and the PWM inverter driven motor efficiency performed better in comparison with Square wave inverter at frequencies 60Hz, 40Hz and 30Hz.

Acknowledgments

I would like to express my sincere appreciation to Dr. Eltom for his generous time and guidance throughout this work. Without his help and support, this work would not have been possible. Also, I would like to express my appreciation to the members of the thesis review committee, Dr. Parten and Dr. Sartipi, for providing a thorough review and suggestions on this document. Finally, I would like to thank my wife Ayla for her patience and support throughout the completion of this work.

Degree

M. A.; A thesis submitted to the faculty of the University of Tennessee at Chattanooga in partial fulfillment of the requirements of the degree of Master of Arts.

Date

12-2008

Subject

Electric motors, Induction--Efficiency

Discipline

Power and Energy

Document Type

Masters theses

DCMI Type

Text

Extent

xiv, 115

Language

English

Call Number

LB2369.2 .D454 2008

Rights

http://rightsstatements.org/vocab/InC/1.0/

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