Abstract
Electric vehicle (EV) motors are subject to extreme and variable loads, resulting in degradation of winding insulation due to high temperatures. This paper describes research on a new conductive composite sensor, which uses insulation resin as a matrix of the sensor element. The sensor, embedded in the windings of EV motors, will provide data on remaining design life of the insulation based on actual vehicle operational and environmental conditions. Improved condition monitoring of the insulation systems of high-performance EV motors can reduce in-use failures by identifying prematurely degraded insulation systems, and providing data for quality improvement programs.
Highlights
Electric/hybrid vehicle motors are especially susceptible to aging effects due to the high motor loads encountered in steep terrains, high payload and high ambient temperatures
[1] Failure of the insulation system of these components can lead to vehicle breakdowns that could be prevented if the condition of the insulation system is known and replaced before motor failure
This paper summarizes the results of research conducted on condition monitoring sensors for high performance epoxy and polyester insulation systems in nuclear power plant electrical equipment
Summary
Electric/hybrid vehicle motors are especially susceptible to aging effects due to the high motor loads encountered in steep terrains, high payload and high ambient temperatures. New diagnostic methods are being looked at such as those analyzing mechanical and electromagnetic deviations in permanent magnet motors used in automotive powertrains [2]. While these methods are very useful, they may be complex, expensive and, even when monitored continuously, some insulation failures occur with no warning. This paper summarizes the results of research conducted on condition monitoring sensors for high performance epoxy and polyester insulation systems in nuclear power plant electrical equipment. Composite degradation sensors are passive, meaning that they respond to aging effects of the insulation automatically, requiring electrical power only when interrogated. Further development will demonstrate suitability of conductive composite degradation sensors for intelligent passive radio frequency identification devices (RFIDs), periodic monitoring by simple resistance measuring devices, or real-time, in-situ monitoring of insulation as part of a comprehensive condition monitoring system
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