A new ZVT high step-up converter with coupled inductors and energy recovery

In this paper an interleaved boost converter is introduced which has a high voltage gain and lower switch voltage stress than a conventional boost converter and has a different structure. Where only one group of active clamp circuits is required to provide both phases and absorb the energy of leakage inductance of the coupled inductance. The main switch and clamp switch are switched on and off during all switching transitions under ZVT, which reduces switching losses. The rate of reduction of the output current of the output diode is controlled by the leakage inductance, thus reducing the reverse recovery problem of diode. This converter is suitable for high frequency and power in high voltage applications. The proposed converter fully analyzed and operation modes are described. The converter is simulated with PSPICE software and the simulation results confirm the theoretical analysis.