A New Quadratic DC/DC Converter with Ultra-High Voltage Gain and Low Current Stress

Subject Areas : Power Engineering

Sayed Jamal al-Din Hosseini ¹ , Sara Hasanpour ² , Ghazanfar Shahgholian ³ , Majid Moazzami ⁴ , Amir Baktash ⁵

1 - Department of Electrical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
2 - Department of Electrical Engineering, Ramsar Branch, Islamic Azad University, Ramsar, Iran
3 - Department of Electrical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
4 - Department of Electrical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
5 - Department of Electrical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran

Received: 2024-08-23 Accepted : 2024-11-04 Published : 2026-03-20

Keywords: Step-up DC-DC converter, Quadratic converter, Current sharing, Coupled-inductor, Continuous input current,

Abstract :

This paper introduces a new double-switch quadratic DC-DC converter with ultra-high voltage gain ratio, low current stress, and low input current ripple for renewable energy applications. This suggested topology uses a coupled-inductor and voltage multiplier cells to achieve the ultra-high voltage conversion ratio. The main benefits of the suggested structure are its ultra-high voltage conversion ratio, low voltage and current stresses, common ground between the input and output sides, and continuous input current with low ripple. Also, in the proposed converter, the current sharing between the magnetic components including the coupled-inductor and input inductor leads to a reduction of their passing current values, which alleviates the overall power losses of the magnetic components and power switches. Furthermore, the voltage stresses on the active switches of the proposed converter are restricted using the regenerative passive clamp circuits. The operating principle, the steady-state analysis, the comparison study, the efficiency estimation as well as design considerations of the introduced circuit are provided in detail. Finally, to justify the performance of the presented converter, a sample prototype (200 W, 25 V- 400 V) is implemented. Regarding the experimental results, the proposed topology can provide a high DC output voltage of 400V under the efficiency of about 96.2%. Moreover, the voltage stress across the power switch of the converter is limited to about 15% of the output DC voltage.

References:


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