Abstract
With the development of aircraft electrification, low-voltage motors are widely used in the auxiliary power devices of aircraft. Thermal aging of the motor winding is one of the most critical reasons for motor deterioration, which is directly related to the reliability of aircraft operation. This paper designs and builds a test platform for the accelerated thermal aging and insulation condition monitoring of low-voltage aviation motor windings. Aging characteristics of the motor winding in terms of facial appearance, insulation resistance, dielectric loss, and insulation capacitance (IC) are analyzed and clarified. Experiment results show that IC has a stronger correlation with the thermal deterioration of aero-motor windings, which can be used as a good indicator. Finally, this paper uses IC as a characterization factor to establish a model for predicting the thermal aging life of the aviation motor winding.
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