Abstract
In this paper, analysis, design and implementation of non-isolated soft-switching bidirectional DC-DC converter with an active switch are described. The proposed topology gives the output voltage as twice as the input voltage and enhances the efficiency up to 94.5% and 92.9% for boost and buck mode operation by proper selection of the duty cycle. Soft switching can be achieved at both steps up and step down operating modes. Small signal analysis based on state space averaging and transfer functions have been presented in detail for the proposed converter. Finally, the feasibility of the desired converter is confirmed to mat lab simulation and investigational results.
Highlights
With the advancement in various industrial applications such as battery charged/discharged converters, auxiliary power supplies, fuel cell-based DC-DC converters, the renewable energy system, hybrid electric vehicles and uninterruptible power supplies system bidirectional DC-DC converters have been widely used [1]-[4]
The whole circuit is simulated using MATLAB software and following the results is obtained for the proposed non isolated bidirectional DC-DC converter with active switch during boost and buck modes
The results obtain from the proposed topology is compared with the conventional simple non isolated bidirectional DC-DC converter without any additional switch and auxiliary circuits to verify its feasibility
Summary
With the advancement in various industrial applications such as battery charged/discharged converters, auxiliary power supplies, fuel cell-based DC-DC converters, the renewable energy system, hybrid electric vehicles and uninterruptible power supplies system bidirectional DC-DC converters have been widely used [1]-[4]. Non-dissipative LCD clamp with an active switch bidirectional DC-DC converter is introduced to achieve maximum efficiency, reduces switching losses by zero voltage turn on and turn off of all semiconductor switches and applicable to high power conversion. This non-dissipative LCD snubber recycles the energy absorbed from either input or output side, and it circulates throughout the switching period. The advantages of the proposed converter topology are high reliability, simple structure, low cost and high efficiency With these characteristics, power can be exchanged from the input voltage source to the output DC battery and vice versa happens with maximum efficiency.
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