A traveling-wave model of electric machines with eccentricity for shaft voltage analysis

Alireza Abbasi and Jalal Nazarzadeh

Journal of Electromagnetic Waves and Applications, 2014, vol. 28, issue 18, 2290-2307

Abstract: This paper presents a discrete model for rotor shaft and stator winding of an electrical machine. Multi-conductor transmission line theory is used for modeling connecting cable, stator winding, and rotor shaft. The conductors used in a stator winding are connected similarly to a multi-conductor transmission line using electrical and magnetic coupling effects. Modal theory is applied to the wave equations of the stator winding to obtain a discrete model for electrical machines winding. The voltage distribution in the stator winding, rotor shaft, and bearings were obtained by numerical simulation under symmetrical conditions and compared with published results for time-domain method. The consequences of a static eccentricity fault on shaft voltage were determined and evaluated using a symmetrical machine.

Date: 2014
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DOI: 10.1080/09205071.2014.964373

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