Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 37, Issue 1, Pages 607-616Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2021.3095516
Keywords
DC-DC power converters; Capacitors; Stress; Switches; Power system measurements; Density measurement; Inductors; Capacitor voltage stresses; high-power density; high-step-up converters; Z-source dc-dc converter
Categories
Funding
- National Natural Science Foundation of China [51907032]
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This article develops a series of improved Z-source dc-dc converters that achieve additional voltage pumping and high power density through two propositions. Proposition 1 introduces two improved positive- and negative-connected Z-source dc-dc converters, and Proposition 2 proposes four novel embedded Z-source dc-dc converters. The performance of the proposed converters is thoroughly compared and validated through experiments.
This article develops a series of improved Z-source dc-dc converters to realize additional voltage pumping and high power density through two propositions. Proposition 1 develops two improved positive- and negative-connected Z-source dc-dc converters (IPZSC and INZSC), using the same number of components as in the existing voltage pumping Z-source converter. Based on Proposition 1, Proposition 2 proposes four novel embedded Z-source dc-dc converters (EZSCs) by placing the source in a specifically designed position, which realizes lower voltage stresses across capacitors. Various technical aspects of the proposed EZSCs, including operations, power losses, and small signal stability analyses are detailed in this paper. Besides, comparisons between the proposed series of improved Z-source dc-dc converters and other existing Z-source dc-dc converters are thoroughly made to demonstrate the better performance of the EZSCs. Finally, experiments are conducted to well validate the effectiveness and superiority of the proposed converter circuits.
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