Lifetime Prediction of Aviation Cables Based on an Improved Electromagnetic–Thermal Coupling Model

Compared with civil cables, aviation cables operate with lower voltage but higher temperature. Thermal stress is the main factor associated with cable lifetime. Without considering the variance in the insulating material’s thermal parameters, traditional models fail to calculate the temperature and lifetime of aviation cables accurately. To accurately calculate the internal temperature of aviation cables and achieve lifetime prediction, an improved electromagnetic–thermal coupling model and a new lifetime model of cables are proposed. The cable temperature is measured to verify the high fidelity and accuracy of the improved model. With real-time measured current and temperature, the online prediction of cable lifetime can be realized.