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Technical Paper

Definition of Test Conditions for High Voltage Aerospace Systems Using the IAGOS Atmospheric Dataset

Aerospace electrical systems are continuing to increase their voltage levels to meet the on-board power demands of more-electric aircrafts (MEAs) where hydraulic and pneumatic systems are replaced with electrical equivalents. Higher power demands are leading to the use of higher voltages and as such it is essential to explore the behaviour of the insulation system in the aerospace environment. This degradation takes place in situations where equipment can be exposed to an aerospace environment consisting of operating temperatures up to 250 °C or as low as - 50 °C, varying air pressure, humidity and ozone. Understanding the impact of these variables on the ageing of high voltage insulation systems is crucial in predicting lifetime over the service life of an aircraft. This paper describes the results derived from an analysis of data within the In-service Aircraft for a Global Observing System (IAGOS) database. This database includes 47,000 flight profiles.