Dynamic　wireless　power　transmission　(DWPT)　is　a　promising　technology　as　it　reduces　the　battery　capacity　carried　by　automated　guided　vehicles　(AGVs)　and　lowers　its　cost　and　weight.　However,　there　are　large　mutual　inductance　and　power　fluctuation　in　the　dynamic　charging　process.　In　order　to　solve　this　problem,　this　paper　proposes　a　low-cost　and　low　fluctuation　dual-receiver　magnetic　coupler,　which　are　connected　in　parallel　by　two　half-bridge　rectifiers.　The　transmitter　employs　an　I-type　solenoid　coil　to　enhance　the　magnetic　field　and　improve　the　coupling.　The　optimized　design　of　the　coupler　structure　enables　the　system　to　have　smooth　mutual　inductance　fluctuation　by　switching　the　two　receiving　coils　with　each　other　during　the　dynamic　charging　process.　The　experimental　results　show　that　the　measured　equivalent　mutual　inductance　fluctuation　is　3.6%,　which　verifies　the　feasibility　of　the　optimized　design　of　the　magnetic　coupling　structure　and　the　effectiveness　of　the　proposed　DWPT　system.　　©　1986-2012　IEEE.