Filtering out electromobility-induced ultra-high EMI
These include electromagnetic compatibility, which has hardly been a topic so far. Due to the very high currents occurring in electric vehicles, manufacturers are confronted with ultra high magnetic field.
This is where the high-voltage on-board network with 400 VDC to 1000 VDC meets the 12 VDC network. The currents in the vehicle can reach up to 500 A. The main source of interference is usually the inverter that drives the motor. However, there are many other sensitive systems that both emit interference and react poorly to such interference. There are many ways and means to protect against electromagnetic interference. The layout of the cabling, its shielding, etc., for example, can be very complex. Rather than attempt to list or define what would be an application specific approach, we suggest narrowing the scope to the use of external EMC filters. But what do such filters do? Using passive components (chokes and capacitors), the undesirable interference signals are attenuated many times over in their intensity, so that their damaging effect does not occur.
In contrast to some industrial or medical filters, for example, the requirements in the automotive sector are much tougher. Such a filter must be particularly robust against vibrations, impacts and shocks, but also against large temperature fluctuations. Exactly tailored to these needs and fully customizable, Schurter’s latest filter series FPAB consist of a single-stage filter impermeable to dust and moisture thanks to the use of a well-sealed connector from Tyco. All connections are screwed to withstand even the most stubborn vibrations.
Schurter – www.schurter.com
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