J. Phys. IV France
Volume 129, October 2005
Page(s) 179 - 183

J. Phys. IV France 129 (2005) 179-183

DOI: 10.1051/jp4:2005129038

Quality assessment of electric low-power motor insulation on the ground of partial discharge investigations using the calibrated acoustic emission method

F. Witos1 and Z. Gacek2

1  Silesian University of Technology, Institute of Physics, Gliwice, Poland
2  Silesian University of Technology, Institute of Power Systems and Control, Gliwice, Poland

Investigation of partial discharge (PD) within the models representing winding insulation of low-power induction motors have been carried out. Apparent electric charge introduced by PD sources has been measured basing on the electric method, whereas the acoustic one has been used to determine properties of acoustic emission signals in the time, discrimination threshold and time-frequency domain. Acoustic emission descriptors (signified by acronyms ADC and ADP, constructed in discrimination threshold domain) distinguish and classify the models connected with different impregnation technologies of winding insulation.

© EDP Sciences 2005