Abstract:

For a class of high-power wireless power transmission applications,the system uses the LCC-S type compensation topology structure,which requires the multiple inverters in parallel to improve power capacity and system stability.In order to reduce the turn-on and turn-off loss of the multiple inverter modules,the conditions for the primary-side LCC resonant network to achieve soft switching are derived.By designing the primary-side resonant network with asymmetric parameters,the impedance of the system is weakly inductive.The zero-voltage turn-on and turn-off of the switch tube are realized.Simulations and experiments verify the feasibility of the proposed design scheme to realize the soft switching of dual inverter parallel system in large power range.

Key words: wireless power transfer, inverter parallel, LCC resonance network, soft switching