Conducted Emission Voltage Reduction for Multi-Cell SST with Current-Type ACC

This paper proposes a common mode (CM) noise reduction method for a multi-cell solid-state transformer (SST) using a current-type active common mode noise canceler (ACC). Multi-cell power converters typically have complex noise propagation paths. However, the proposed current-type ACC with Rogowski coil effectively reduces electromagnetic noise in power converters with multiple cells. The effectiveness of this approach is validated through experimental results. The conducted emission voltage of the power converter is reduced by 20.8dBμV when the ACC is connected to the DC voltage part on the primary(high-voltage) side in one cell.