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This paper proposed a new soft-switched non-isolated bidirectional converter for energy storage systems. The hard-switched non-isolated bidirectional converter is improved with additional soft-switch cell incorporated with auxiliary active switches, diodes and passive elements. The main operating characteristics of this topology are to transfer the power flow in both directions from low voltage to...
This paper proposes a new soft-switched High Step-up DC-DC converter for energy storage systems in DC traction vehicles. In this converter, soft-switching operation, i.e., zero current switching has been obtained by employing dual resonant auxiliary circuits to the conventional step-up DC-DC converter. The auxiliary resonant consists of additional auxiliary switches; inductor and capacitor are used...
This paper proposes a new ZCS interleaved bidirectional buck-boost DC-DC converter for energy storage applications. The conventional interleaved converter has been improved with the auxiliary resonant cells in order to obtain the zero current turn-off of the main switching devices. The major advantage is the reduction of switching losses in four main switching devices of the main converter by utilizing...
This paper deals with a new ZCS bidirectional buck-boost converter for the energy storage applications. The conventional buck-boost converter is upgraded with an auxiliary resonant circuit to obtain the zero current switching during commutation of main IGBTs. The key advantage of this proposed topology has the reduced switching losses, as all the switching devices are operated in ZCS soft-switching...
This proposes a novel ZVZCS hybrid bidirectional DC-DC converter based on fuel cells and supercapacitor devices. The described converter employs only one high frequency transformers to couple the half-bridge and full-bridge circuits together in the primary side and voltage doubler circuit in secondary side. Boost type converter can limit the output ripple current of the fuel cells; All the primary...
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