An analytical study on steady-state performance of an induction motor connected to unbalanced three-phase voltage

Author

Wang, Yaw-Juen

Author_Institution

Dept. of Electr. Eng., Nat. Yun-Lin Univ. of Sci. & Technol., Taiwan

Volume

1

fYear

2000

fDate

2000

Firstpage

159

Abstract

This paper presents an analytical study into the steady-state performance of a three-phase induction motor powered by unbalanced supply voltage. Positiveand negative-sequence equivalent circuits of the induction motor are used to ascertain phenomena caused by voltage unbalance such as line-current unbalance, derating, drop in machine efficiency, etc. This paper also proposes the ratio of motor positive- to negative-sequence impedance as an index that allows the sensitivity of line-current unbalance to voltage unbalance to be effectively evaluated. A numerical example is provided to show practical applications of the proposed analytical model

Keywords

equivalent circuits; harmonic distortion; induction motors; machine theory; power system harmonics; derating; line-current unbalance; machine efficiency reduction; negative-sequence equivalent circuits; positive-sequence equivalent circuits; steady-state performance; three-phase induction motors; unbalanced three-phase supply voltage; Analytical models; Electricity supply industry; Equivalent circuits; Home appliances; Impedance; Induction motors; Performance analysis; Power supplies; Steady-state; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Engineering Society Winter Meeting, 2000. IEEE

Print_ISBN

0-7803-5935-6

Type

conf

DOI

10.1109/PESW.2000.849947

Filename

849947