A complete system able to measure complex
impedance, both in magnitude and phase, of an automotive electrical load is designed. The development of such system emerged from the need of measure the impedance of these loads in a wide range of frequencies (100 kHz to 30 MHz) while being connected to power supply and in operation. This powered up condition introduces several problems when the impedance is measured by means of traditional instruments such as Vector
Network Analyzers (VNA), which could be damaged by transients. Understanding the behaviour of electrical cars loads in the frequency domain is of primary importance not only for in-vehicle Power Line Communication (PLC) channels response,
but also to understand electromagnetic emissions (EMI)problems related with this type of communications.
CitationAragon, M. [et al.]. Power line impedance characterization of automotive loads at the power line communication frequency range. A: International Symposium on Electromagnetic Compatibility (EMC Europe). "EMC Europe 2010 9th International Symposium on EMC joint with 20th International Wroclaw Symposium on EMC". Wroclaw: 2010, p. 273-277.
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