Transient emission analysis of EV- and HEV-powertrains using simulation

As one consequence of the increasing grade in electrification of vehicle powertrains the electromagnetic interference (EMI) potential of these components becomes increasingly relevant. The conducted disturbances caused by high-voltage (HV) and high-energy pulses originating from the DC/AC-inverter have to be analyzed, as they can easily couple from the HV-DC traction-network to the low-voltage (LV) onboard-systems-network, where they could cause malfunctions. Consequently technical standards are revised concerning these problems (ISO7637 [1] or CISPR25 [3]). As the required or proposed measurement setups within these standards can be very time and fund consuming, it is desirable having the ability to repeatedly analyze a configuration´s or device´s disturbance potential by simulation techniques, prior to real hardware-testing. This contribution presents one method, which fulfills these requirements. The method is demonstrated, exemplary, according to a voltage transient emission test along high voltage supply lines as proposed in the new draft standard ISO7637-4 [1].