Innovative EMC filter solutions for e-vehicles

摘要

The probability of electromagnetic interference problems increase as cars are equipped with more and more electronic systems. This applies in particular to electric vehicles (xEVs) with their additional power electronics for the motor inverters. The use of EMC filters offers a reliable and weight-saving way to eliminate mutual interference from the densely packed sources. Both hybrid and fully electric drive vehicles, or xEVs, are packed full of electronics which far exceed that of combustion-engine vehicles in both quantity and technical requirements. For, in addition to the increasingly complex systems for safety, comfort, and communication, it is the electrical drive systems - the high-voltage battery, inverter, and at least one electric motor - that really up the ante for the electronic systems. Consequently, the number-one priority when developing such vehicles is to ensure that the individual systems, crammed into very restricted spaces, do not cause mutual interference. It is also important that no interference affects systems outside the vehicle. These EMC requirements are regulated by international standards such as CISPR 25 or the EU Directive ECE-R10.