Soft-Switched Dual-Input Single-Output DC/DC Converter with Hybrid Voltage Multiplier

In this paper, a Dual-Input Single-Output (DISO) DC/DC converter with soft switching operation is presented. The proposed converter structure consists of coupled inductors (CI) and voltage multiplier (VM) circuit. In addition to improving the voltage gain, the use of the VM circuit, reduces the voltage stresses of the semiconductors. In this converter, the soft switching conditions are provided through the resonance between the VM circuit capacitors and the CI leakage inductance. Therefore, no additional components are required. Since the VM circuit is shared between the two inputs legs, the component count is reduced. The proposed converter topology, its principles and modes of operation as well as the steady-state analysis are presented in this paper. Also, to verify the performance and theoretical analysis of the proposed converter, it is designed and simulated for 1.5kW output power with 20-30 V inputs and 400V output voltages, and its results are discussed in detail.