Authors: Reineri, C.¹; Gómez, J.¹; Balaguer, E.²; Morcos, M.³

Source: Electric Power Components and Systems, Volume 34, Number 7, July 2006 , pp. 817-829(13)

Publisher: Taylor and Francis Ltd

Abstract:

A summary of the literature about the effect of unbalanced supply voltage on induction motors is presented. An experimental study was carried out, where rotor currents of a wound-rotor induction motor were measured under different unbalance conditions with respect to positive and negative sequence voltage magnitudes and phase angles. Rotor overcurrent is not a function of the angle between positive and negative voltage components. Effect of rotor overcurrent is under-estimated by the measured stator overcurrent, and rotor currents are closely similar. The currently used unbalanced-voltage derating factors do not seem to consider rotor winding heating, which is only applicable to squirrel-cage rotors.

Keywords: derating factor; induction motor; power quality; voltage unbalance; winding heating

Document Type: Research article

DOI: http://dx.doi.org/10.1080/15325000500488636

Affiliations: 1: Electric Power Systems Protection Institute, National University of Rio Cuarto, Río Cuarto, Argentine 2: Department of Technology, Jaume I University, Castellón, Spain 3: Department of Electrical and Computer Engineering, Kansas State University, Manhattan, KS, USA

Publication date: 2006-07-01

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