Eur. Phys. J. Appl. Phys. 43, 165-172 (2008)
https://doi.org/10.1051/epjap:2008064

Wide frequency range analysis of the electromagnetic emissions of electrical machine for diagnosis^*

LSEE-Université d'Artois, Technoparc future, 62400 Béthune, France

Corresponding author: raphael.romary@univ-artois.fr

Received: 3 July 2007
Accepted: 25 February 2008
Published online: 30 April 2008

Abstract

The paper presents the possibilities to evaluate the health of an electrical machine by analyzing its electromagnetic emissions. Different piece of information can be detected according to the frequency range. First of all, a monitoring system sensitive to the degradation of the turn-to-turn insulation quality of the stator winding is presented; it is based on high frequency electromagnetic emissions. The second part of the paper is based on the medium and low frequency emission analysis. It explains how to detect turn-to-turn short circuits in stator windings or in the excitation coils of synchronous machines.