Doctoral Dissertations

Keywords and Phrases

Boost; DC-DC; High-voltage-gain; Photovoltaic; Power electronics; Renewable


This dissertation proposes several advanced power electronic converters that are suitable for integrating low-voltage dc input sources, such as photovoltaic (PV) solar panels, to a high voltage dc bus in a 200 - 960 V dc distribution system. The proposed converters operate in the continuous conduction mode (CCM) and offer desirable features such as low-voltage stresses on components, continuous input currents, and the ability to integrate several independent dc input sources. First, a family of scalable interleaved boost converters with voltage multiplier cells (VMC) is introduced. Several possible combinations of Dickson and Cockcroft-Walton VMCs are demonstrated and compared in terms of the voltage gain, number of components, and input current sharing. This dissertation also presents a novel VMC structure called Bi-fold Dickson. The novel VMC offers equal current sharing between phases regardless of the number of stages, voltage ripple cancellation at each stage, and does not require an output diode. A family of high-voltage-gain multilevel boost converters is presented, with detailed example of the hybrid flyback and three-level boost converter. In this family, the effective frequency seen by the magnetic element is multiple times the switching frequency, and therefore smaller magnetic devices can be used. Theory of operations, steady-state analysis, component selections, simulation, and efficiency analysis are included for each proposed converter. The operation of the proposed converters was further verified with 80 - 200 W hardware prototypes"--Abstract, page iv.


Ferdowsi, Mehdi

Committee Member(s)

Kimball, Jonathan W.
Shamsi, Pourya
Wunsch, Donald C.
Rownaghi, Ali A.


Electrical and Computer Engineering

Degree Name

Ph. D. in Electrical Engineering


Najran University
Saudi Arabia Cultural Mission
Saudi Arabia Ministry of Education


Missouri University of Science and Technology

Publication Date

Fall 2018

Journal article titles appearing in thesis/dissertation

  • A family of non-isolated interleaved boost converters with voltage multiplier cells
  • High-voltage-gain DC-DC step-up converter with bi-fold Dickson voltage multiplier cells
  • A family of high-voltage-gain multilevel boost converters
  • A family of interleaved step-up topologies using single-switch multistage boost converters and voltage multiplier cells


xviii, 157 pages

Note about bibliography

Includes bibliographic references.


© 2018 Ahmad Saeed Y. Alzahrani, All rights reserved.

Document Type

Dissertation - Open Access

File Type




Thesis Number

T 11411

Electronic OCLC #