Improvement of Predictive Pulsed Compensation using Adapted Synchronization

Within the scope of miniaturization of power electronics in electrical vehicles, the size and weight of required electromagnetic interference (EMI) filter is getting more and more important. Active EMI filters can provide a solution to reduce those two critical parameters. One active EMI filter approach can be Predictive Pulsed Compensation (PPC). Using power electronic components, a compensation pulse is injected to the noisy power lines. The timing and amplitude of this pulse compared to the EMI source of the power converter determines the achievable attenuation of the compensation circuit. Different operating points of the power converter lead to various time delays between the switching signal and the resulting switching event. These delays cause a synchronization error of the compensation pulse related to the power converters’ operating point. This paper presents a method to generate an appropriate synchronization signal for adjustment of PPC due to different operation points of the power converter.