High Step-Up Boost-Cuk-Forward Converter with Reduced Switch Voltage Stress and Ripple-Free Input Current

Reza Heidari, Mohammad Ali Ghanbari, Ehsan Adib, Kwang-Il Jeong and Jin-Woo Ahn ()
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Reza Heidari: Mechatronics Engineering Department, Kyungsung University, Busan 48434, Republic of Korea
Mohammad Ali Ghanbari: Electrical Engineering Department, University of Isfahan, Isfahan 8174673441, Iran
Ehsan Adib: Electrical and Computer Engineering Department, Isfahan University of Technology, Isfahan 8415683111, Iran
Kwang-Il Jeong: Mechatronics Engineering Department, Kyungsung University, Busan 48434, Republic of Korea
Jin-Woo Ahn: Mechatronics Engineering Department, Kyungsung University, Busan 48434, Republic of Korea

Energies, 2023, vol. 16, issue 17, 1-17

Abstract: A new combined boost-Cuk-forward (CBCF) converter with ripple-free input current and low switch voltage stress is proposed for high step-up applications. Two coupled inductors are applied to achieve low switch voltage stress as well as balanced dc-link voltages, wherein the former is placed in series with the boost diode, and the latter is formed as a forward converter. Because these inductors are coupled with the output Cuk inductor, a ripple-free input current is also attained. The proposed converter is run at discontinuous conduction mode (DCM) by applying a low output-side Cuk inductance to reduce the switching loss by providing a ZCS turn-on of MOSFET and removing the diode reverse recovery current. In addition, the proposed converter does not have a problem with ground leakage current. The practical results verify the performance and effectiveness of the proposed CBCF high step-up converter.

Keywords: boost converter; Cuk converter; discontinuous conduction mode; forward converter; high step-up converter; photovoltaic (PV); ZCS condition (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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