Open AccessA new enhanced‐boost switched‐capacitor quasi Z‐source network
Author(s) -
Hosseini Seyyed Majid,
Ghazi Reza,
Nikbahar Ali,
Eydi Mohammad
Publication year - 2021
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/pel2.12045
Subject(s) - ripple , switched capacitor , transformer , capacitor , computer science , electronic engineering , electrical impedance , voltage , topology (electrical circuits) , network topology , electrical engineering , engineering , computer network
This paper proposes a new enhanced‐boost non‐transformer‐based impedance source network. The strong boosting ability of the proposed topology is realized by making use of the switched capacitor concept in the formerly introduced enhanced‐boost quasi Z‐source network (EB‐qZSN) without any additional active switch. Meanwhile, the advantages of the EB‐qZSN such as input current continuity and shared ground between the input and the output are maintained. In addition to the lower shoot‐through requirement to obtain high voltage gains, the proposed impedance network takes advantage of a smaller size of passive components along with a lower input current ripple to achieve higher power density and higher efficiency. Moreover, the lower total rating of the switching elements, defined by switching device power, directly translates to lower cost for the proposed method. The operation principles and the design guideline of components are explained in detail and a thorough comparison with other ZSN is presented. A 240W DC–DC prototype converter was built to validate the performance principles and properties of the proposed impedance network.