Service Life Prediction for Rotating Electrical Machines on Aircraft in Terms of Temperature Loads

Abstract

This article is focused on the research concerning the calculation of the durability of electrical machines installed in the electrical system of M-28 and C-130 Hercules aircraft. The article presents a method of predicting the service life of aircraft commutator machines, which are the primary source of electrical energy. The result of the research was the determination of the durability of bearings and coils of electrical machines operated on aircraft based on a flight profile analysis. It is problematic to directly measure the wear of bearings and windings of an electric machine on the aircraft. Their usage can be determined from the relation between their wear and the ambient temperature. This research can be used in practice to plan maintenance work on the analyzed aircrafts.

Design and Testing of Disconnection Actuators for Enhancing Safety and Preventing Failure Escalation

“…For electrical machines, enhanced reliability is often reached through fault-tolerant designs [14,15] and reliability-oriented methodologies [16]; however, ambient factors (temperature, humidity, etc. ), as well as wearing out from prolonged use, might induce failures [17,18] that could quickly escalate, compromising the whole system integrity. In these circumstances, failure escalation/propagation could be prevented by adopting a disconnection system that mechanically decouples the electrical machine from the rest of the system.…”