2 research outputs found
Design and implementation of multi-port DC-DC converters for electrical power systems
The thesis proposes developing, analysing, and verifying these DC-DC converters to
improve the current state-of-the-art topology. Four new DC-DC converters for
applications like light emitting diode, lighting microgrids DC, PV applications, and
electric vehicles are as follows.
In this study, the two-input converter is presented. The two-input converter that has
been proposed serves as the interface between the two input sources and load. Using
two switches and two diodes, the proposed converter minimises switching losses and contains
eight components in total, making it compact and low volume. As a result, the highest
average efficiency is 92.5%, and the lowest is 89.6%.
In this research, the new three-port converter that has been proposed serves as the
interface between the input source, a battery, and a load. In addition, the converter is
suitable for use in standalone systems or satellite applications. A low-volume converter is
designed with three switches and two diodes, thereby minimizing switching losses and ten
components in total. Regarding efficiency, the highest average is 92.5%, and the lowest is
90.9%.
Also, this study proposes a single-switch high-step-up converter for LED drivers and PV
applications. A further benefit of the proposed converter over conventional classical
converters is that it utilises only one active switch. These results align with simulation
results, and its gain is 6.8 times greater than classical converters. Furthermore, stress
across switches and diodes is smaller than the output voltage, approximately 50%.
Semiconductor losses were limited with a low duty cycle of 0.7. This makes the highest
average efficiency 95% and the lowest 93.9%.
The new four-port converter is presented for applications such as microgrid structures
and electric vehicles. As part of the integrated converter, two or three converters are
combined by sharing some components, such as switches, inductors, and capacitors, to
form a single integrated converter. As a result of the four-port converter proposed,
battery power can be managed, and output voltage can be regulated simultaneously