Abstract
Employing partial power processing (PPP) technique for quasi Z-source converter (QZSC) a new structure of the converter is presented. Using PPP technique although eliminates electrical insolation, but permits reducing voltage and current stress at the semiconductors, if compared with full power proposals. In this work, two PPP structures are discussed: A first one, similar to the basic topology, where the output voltage of the power converter is in series with the input voltage; and a second one, where the output is in series with the capacitor of the QZSC. This minor modification, which requires no extra elements, improves the power rating, voltage gain, and requires a lower transformation ratio. An experimental prototype of the proposed converter has been tested and the results are compared with other implementations, permitting to validate the theoretical analysis as well as the advantages that this proposal provides.
Highlights
As one of the main backbones of the power electronics industry an uncountable number of research works have been devoted to the study and design of high efficiency, low power rating, and low cost DC/DC converters for different applications such as: PV, electrical equipment, electrical vehicles, energy storage, and communication systems
One recent technique that is giving rise to good results is based on partial power processing (PPP) [1,2]
This paper presents a modified quasi Z-source converter (QZSC) using PPP technique
Summary
As one of the main backbones of the power electronics industry an uncountable number of research works have been devoted to the study and design of high efficiency, low power rating, and low cost DC/DC converters for different applications such as: PV, electrical equipment, electrical vehicles, energy storage, and communication systems. A dual input non-isolated partial power is similar to a full power processing converter. A dual input non-isolated partial power converter converter was introduced [13,14,15], which employs similar PPC. Zinductor and a capacitor that handle the charge and discharge cycles to provide the maximum power source converter (ZSC) which is the first proposed structure of impedance network converters, conversion during through interval [19]. Using only one switch to shoot through switching, using or three leg H-Bridge switching implementing a simple control using push-pull switching, have been prioritized in the selection of topology, and push-pull switching topology [21] (Figure 2) In this case reducing the numberthe of proposed converter [22].
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