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http://dx.doi.org/10.6113/JPE.2019.19.3.645

Analysis and Implementation of High Step-Up DC/DC Convertor with Modified Super-Lift Technique  

Fani, Rezvan (Department of Electrical Engineering, Faculty of engineering, Shahid Chamran University of Ahvaz)
Farshidi, Ebrahim (Department of Electrical Engineering, Faculty of engineering, Shahid Chamran University of Ahvaz)
Adib, Ehsan (Department of Electrical and Computer Engineering, Isfahan University of Technology)
Kosarian, Abdolnabi (Department of Electrical Engineering, Faculty of engineering, Shahid Chamran University of Ahvaz)
Publication Information
Journal of Power Electronics / v.19, no.3, 2019 , pp. 645-654 More about this Journal
Abstract
In this paper, a new high step up DC/DC converter with a modified super-lift technique is presented. The coupled inductor technique is combined with the super-lift technique to provide a tenfold or more voltage gain with a proper duty cycle and a low turn ratio. Due to a high conversion ratio, the voltage stress on the semiconductor devices is reduced. As a result, low voltage ultra-fast recovery diodes and low on resistance MOSFET can be used, which improves the reverse recovery problems and conduction losses. This converter employs a passive clamp circuit to recycle the energy stored in the leakage inductance. The proposed convertor features a high conversion ratio with a low turn ratio, low voltage stress, low reverse recovery losses, omission of the inrush currents of the switch capacitor loops, high efficiency, small volume and reduced cost. This converter is suitable for renewable energy applications. The operational principle and a steady-state analysis of the proposed converter are presented in details. A 200W, 30V input, 380V output laboratory prototype circuit is implemented to confirm the theoretical analysis.
Keywords
Coupled inductor; DC-DC convertors; High step up converter; Non-isolated technique; Super-lift technique;
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