Soft switching of DC-DC converter is done here. This is obtain good efficiency and to reduce the switching losses. Zero voltage switching reduces the switching losses in the circuit. This is done by using boost converter. Soft-switching characteristic of the proposed converter reduces switching loss of active power switches and raises the conversion efficiency. A voltage step-up function and a ...

<span lang="EN-US">This paper proposes a new bidirectional step-up DC-DC converter, namely modified buck-boost converter. The proposed converter was derived from the conventional Output voltage expression of by considering drops across inductors and switching devices. results have shown that with same parameter input LC filter, has lower conduction losses. Moreover, rated filter capacitor...

This paper propounds a new high step-up DC-DC topology based on the active switched-inductor (A-SL) technique, which utilizes coupled inductor (CI) for performance enhancement. Among features of presented are following: (a) Better voltage gain (VG) and efficiency, (b) Since there low voltages across power switches, it is possible to reduce amount that lost as result using MOSFETs with rating re...

This paper presents a high step-up boost converter with diode capacitor technique. In this topology an additional stage of voltage multiplier cells (diodes and capacitors) is incorporated into the conventional boost converter which will increase the voltage gain and efficiency of the converter. The peculiarity of this new method is that the switching losses, ripples and the stresses are low. An...

This paper presents a new three-phase step-up dc–dc converter with a three-phase high-frequency (HF) isolation transformer in a current-mode controlled closed loop. The converter’s main characteristics are reduced input ripple current, step-up voltage, HF transformer, reduced output voltage ripple due to threepulse output current, and the presence of only three active switches, this being a mai...

High power and high voltage gain DC-DC converters are key to high-voltage DC (HVDC) power transmission for offshore wind power. This paper presents an isolated ultra-high step-up DC-DC converter in matrix transformer configuration. A flyback-forward converter is adopted as the power cell and the secondary side matrix connection is introduced to increase the power level and to improve fault tole...

An LLC resonant converter has the advantages of simple structure and soft switching. It can enable bidirectional power transmission, but it is difficult to realize a normalized gain greater than one under backward mode (backward step-up mode). Cascaded dc/dc converters or topological changes solve this problem, additional switches components are required losses added. Without changing converter...