Title :
An experimental study on thermally and vibratingly accelerated life tests for insulating layer of same-phase low voltage stator windings
Author :
Ohyama, R. ; Yamada, N.
Author_Institution :
Dept. of Electr. Eng., Tokai Univ., Kanagawa, Japan
Abstract :
A thermally and mechanical vibratingly accelerated life test of low voltage stator windings in three-phase induction motors using for ordinary elevator equipments was investigated. The test was carried out to investigate a cause of insulating layer short between same-phase stator windings installed in a slot. A mechanical stress from frequent start-stop repeats of elevator equipments was applied to the experimental model of stator windings. In this paper, the fundamental characteristics of insulation resistance, dielectric loss tangent and partial discharge voltage are shown and the effects of the thermal and mechanical stress on the insulating layer life are discussed
Keywords :
dielectric losses; induction motors; insulation testing; life testing; lifts; machine insulation; machine testing; partial discharges; stators; dielectric loss tangent; elevator equipment; insulating layer short; insulation resistance; mechanical stress; partial discharge voltage; same-phase low-voltage stator winding; slot; start-stop repeat; thermal stress; thermally accelerated life test; three-phase induction motor; vibratingly accelerated life test; Acceleration; Dielectric losses; Dielectrics and electrical insulation; Elevators; Life estimation; Life testing; Low voltage; Stator windings; Stress; Thermal resistance;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2001 Annual Report. Conference on
Conference_Location :
Kitchener, Ont.
Print_ISBN :
0-7803-7053-8
DOI :
10.1109/CEIDP.2001.963524
