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Dynamic wireless power transfer (DWPT) of electric vehicles employing individual transmitters is getting popular owing to the advantages of high efficiency and less unwanted magnetic field emissions. However, too many power supply devices and passive components of compensation networks will make individual-transmitter-type DWPT systems under intense cost pressure for a long charging lane. Besides, circuit parameters of different transmitters will be different due to unignored component errors. Therefore, in this paper, a cost-reducing multiplexing LCC module (MLM) is proposed, and the effects of passive component errors are considered. An MLM makes unenergized transmitter work as a part of LCC compensation network resulting in no additional inductor. Simultaneously, one power inverter is shared by two transmitters in an MLM and 50% of inverters can be reduced. A novel distribution method and matched controlling storage of MLMs are proposed so that any two adjacent transmitters can be controlled independently and simultaneously. Due to passive component errors, unwanted reactive load will be placed on the inverter, and different transmitters will have different output power even in the same coupling and loading condition. A voltage adjustment method and a redistribution of passive components for MLMs are proposed to solve these problems. At last, a 6-kW-level laboratory scale prototype has been constructed and tested.

Dynamic Wireless Power Transfer System for Electric Vehicles Employing Multiplexing LCC Modules With Individual Transmitters