Cancellation Path Identification for Effective Active EMI Filtering with Synthesized Signals in Inverters for Electric Powertrain Systems

With the trend of electrified drive trains to allow for reduced or even zero emission mobility, the role of power electronic systems' efficiency continues to grow in importance. To reduce switching losses, modern power electronic systems make use of steep switching slopes. In combination with high switching frequencies, relevant electromagnetic disturbances can be emitted and need to be reduced. Conventionally, such conducted emissions are reduced using passive filter components which are increasingly being questioned due to their high weight and construction volume. Active filtering concepts promise to reduce these issues but some of them need to be stabilized. In this paper, a simple identification concept for stabilization purposes will be introduced and applied to a simple test setup.