![]() While designing the vehicle we have to assess EMC (Electromagnetic Compatibility) of all these subsystems and components to ensure components safety along with living beings safety. Let consider an electric vehicle with 100KW electric drive operating at 400V means it is having current of 250A which creates a strong magnetic field. Chevrolet Volt PHV is having Front wheel drive rated 55 kW (x2) works on 400 V DC.Toyota Prius PHV is having Front wheel drive rated 60 kW works on 350 V DC.Toyota Prius (3rd gen.) is having 74 kW Front wheel drive works on 400 V DC.Tesla model S is having 235 kW Rear wheel drive works on 650 V DC.BMW i3 is having 125 kW rear wheel drive works on 500 V DC.Nissan LEAF is having 125 kW rear wheel drive works on 400 V DC.If we observe the power and the voltage ratings of available electric vehicles, power ratings are between few tens of KW to hundreds of KW whereas voltage ratings are in hundreds of volts so that current levels will be in hundreds of Amperes, which causes stronger magnetic fields ![]() But as compare to ICE (Internal Combustion Engine) vehicles, Electric Vehicles are combination of various subsystems and electronic components like battery, BMS, DC-DC converter, inverter, electric motor, high-power cables distributed around the vehicle and chargers, all these are working at high power and frequency levels which causes the emission of high-level low-frequency EMI. Fossil fueled vehicles also suffer from Electromagnetic Interference (EMI) - The ignition system, starter motor and switches cause broadband EMI and electronic devices cause narrowband EMI. When current passes through a conductor it creates electromagnetic fields and almost all electronic devices like TVs, washing machines, induction stove, traffic lights, mobile phones, ATMs and laptops etc., will emit the electromagnetic fields.
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