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high-step-up-converters
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Design and Implementation of a DC/AC Converter with High Step up and High Efficiency in Wide Output Power Range for Photovoltaic Applications
, M.Sc. Thesis Sharif University of Technology ; Zolghardi, Mohammad Reza (Supervisor)
Abstract
Solar power is expensive, so engineers are encouraged to put effort on increasing efficiency of solar power equipments. Since photovoltaic panels usually output a low voltage, variable direct current electricity, a boost converter and a suitable inverter are required to use this energy for ordinary commercial appliances. In this project, high step up, high efficiency converters are investigated, and the best converter with high efficiency and limited switch stress which achieves high voltage gain by capacitor multipliers and coupled inductors is illustrated. Afterwards, methods for improving efficiency such as modifying the converter structure and its control strategy are suggested. The...
A single-switch quadratic boost with stacked zeta converter
, Article 12th Power Electronics, Drive Systems, and Technologies Conference, PEDSTC 2021, 2 February 2021 through 4 February 2021 ; 2021 ; 9780738111971 (ISBN) ; Tarzamni, H ; Sabahi, M ; Khoun Jahan, H ; Mohammadsalehian, S ; Blaabjerg, F ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2021
Abstract
A high step-up converter including one active switch is presented in the present work. The introduced structure is a combination of Quadratic boost converter and Zeta converter; therefore, it features low input and output current ripples. The energy of leakage inductor is inherently recovered and the voltage spike on switch is perfectly mitigated. The voltage across diodes and switch is quite lower than the boosted output voltage which can be a prominent issue in high step-up converters. This can lead to employ switches and diodes with low conduction losses causing overall efficiency to increase. The converter function in CCM and DCM are analyzed, and the voltage conversion ratio along with...
Operation and design analysis of an interleaved high step-up DC–DC converter with improved harnessing of magnetic energy
, Article International Journal of Circuit Theory and Applications ; Volume 49, Issue 2 , 2021 , Pages 221-243 ; 00989886 (ISSN) ; Tarzamni, H ; Kolahian, P ; Sharif University of Technology
John Wiley and Sons Ltd
2021
Abstract
In this paper, a new interleaved DC–DC converter based on a coupled and a single input inductor is proposed. The suggested high step-up converter utilizes various inductive and capacitive methods to transfer magnetic energy more efficiently. The output voltage is regulated with the switches' duty cycle and the coupled inductor (CI) turns ratio, which provide a wide output voltage range. Interleaving improves the converter reliability, employs both the first and third areas of CI's B-H plane, cancels DC component of the CI, and reduces the input current ripple of the proposed converter with twice switching frequency. Utilization of two output ports for voltage stress and ripple reduction in...