Power Fluctuation Suppression Technology of EV-DWC System Based on LCC-S Series Hybrid Topology

Aiming at the serious power drop problem in the transition area of dynamic wireless charging system of electric vehicles in short guide rail mode, this paper proposes a parameter configuration and optimization method based on LCC-S series hybrid topology system. Combined with the self-decoupling characteristics of the double-D quadrature (DDQ) coil, the LCC-S resonant network with symmetric transmitting terminal and receiving terminal is adopted respectively to form a dual energy transmission channel of input series output series (ISOS), avoiding the current surge caused by mutual inductance drop. By configuring the corresponding inductance and capacitance values, the output current of the system is independent of the load. On this basis, the value of parameter Lf is optimized to minimize the current output fluctuation of the EV-DWC system. The simulation results show that the maximum fluctuation of the output load current of the system is 4.1% when the distance between transmitting terminal 1 and transmitting terminal 2 is 18cm. keywords - EV-DWC, power fluctuation, Hybrid topology.