Dynamic wireless power transfer systems will have a DC bus to supply power to inverters with transmission coils intermittently placed over long distances on the road surface. Since the wiring inductance increases with the length of the DC bus, inverters located far from the power source of the DC bus are connected via this wiring inductance. When the inverter performs current control on the output side, it may cause negative impedance, resulting in oscillation of the DC bus voltage. In this paper, a control method is proposed to prevent instability of the DC bus voltage by utilizing positive feed-forward (PFF) control. The results from the small-scale prototype experiment demonstrate that the proposed control effectively prevents instability.
