Electromagnetic interference (EMI) is an unintentional form of electromagnetic energy that can often affect the performance of both the system creating the interference and external systems. EMI typically manifests itself as a loss of performance in systems that are exposed to the interference, e.g., communication range is reduced, computers malfunction, or monitoring systems fail. Various electric vehicles (EVs) were measured to evaluate their potential EMI emissions when used in today's hostile commercial electromagnetic environment. Measurements were made in accordance with specification SAE J551 and MIL-STD-461C where applicable. Vehicle emissions were measured using standard open-field techniques and, for reference, several vehicles were measured in a screen room using a dynamometer. Correlation in the measurements taken from the electric vehicles in both testing scenarios was observed. Measured field levels in most cases were below the specified limit line. In cases where field levels exceeded specification limits, measured electric and magnetic field levels were compared to Navy exposure field limits. Measured field levels were found to be much lower than the levels established by the Navy exposure field limits.
EMI Measurement and Mitigation Testing for the ARPA Hybrid Electric Vehicle Program
1996
108 pages
Report
No indication
English
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