Superposition Of Shield Currents In Inverter-Fed Ac-Motors

Shields generally solve EMC problems due to their high efficiency. When it comes to an electrical automotive drive system, the relatively small quantities of a non ideal shield are of importance due to the high level of emissions generated which face very stringent requirements for low level emissions. As a consequence, the shield and ground loop currents are decisive for various EMC conducted and radiated emissions issues. Among others the resulting current distributions directly generate emitted magnetic fields.