Development of an efficient voltage regulation mechanism for switched capacitor converter with exponential gain (2023)

Authors

DOI:

https://doi.org/10.15587/1729-4061.2022.270316

Keywords:

DC-DC converter, switched capacitor, power conditioning, inductor-less converter, voltage multiplier

Abstract

The compact switched-capacitor converter with exponential gain and modular design has been adopted in this paper. Two approaches have been applied to improve the efficiency by providing multiple no-load voltages. The first modifies the switching strategy to bypass the gain of one or more stages. The second introduces modified design that provide additional no-load voltages through alternative current paths. The voltage regulation is implemented by two control loops: The outer loop is designed to produce the minimum feasible no-load voltage and the inner loop adjusts the duty ratio of the switching signals to regulate the voltage to meet the desired reference. Switched capacitor converters have been used as voltage multipliers with constant voltage gain. The efficiency of a switched capacitor converter depends on the ratio between regulated to unregulated output voltage. Therefore, output voltage adjustment of these converters causes a significant efficiency reduction. By providing multiple no-load voltages within the output voltage range the efficiency of the switched capacitor converter can be improved. The proposed design has been applied to a three-stage converter to provide six no-load voltages. Simulation results demonstrate that the average efficiency over the entire output voltage range is more than 90% of its maximum efficiency of the unregulated switched capacitor converter which reflects the effectiveness of the proposed scheme. This paper offers an efficient method to regulate the voltage of a modular switched capacitor converter with exponential gain. The advantages of the proposed design are small number of added components, does not require additional sources and suitable for higher power range

Supporting Agency

  • The authors thank the University of Mosul/College of Engineering and the College of Electronics Engineering at Ninevah University for their assistance in improving the quality of this work.

Author Biographies

Mohamed N. Abdul Kadir, University of Mosul

Doctor of Philosophy in Electrical Engineering, Literature

Department of Electrical Engineering

Collage of Engineering

Yasir M. Y. Ameen, University of Mosul

Doctor of Philosophy in Electrical Engineering, Assistant Professor

(Video) Introduction to Switched-Capacitor DC-DC Converters,Switched-Capacitor DC-DC Converter

Department of Electrical Engineering

Collage of Engineering

Harith Al-Badrani, Ninevah University

Doctor of Engineer in Electrical Engineering, Assistant Professor

Department of Electronic Engineering

College of Electronics Engineering

References

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Development of an efficient voltage regulation mechanism for switched capacitor converter with exponential gain (1)

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Published

2022-12-30

How to Cite

Abdul Kadir, M. N., Ameen, Y. M. Y., & Al-Badrani, H. (2022). Development of an efficient voltage regulation mechanism for switched capacitor converter with exponential gain . Eastern-European Journal of Enterprise Technologies, 6(5 (120), 18–28. https://doi.org/10.15587/1729-4061.2022.270316

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Issue

Vol. 6 No. 5 (120) (2022): Applied physics

Section

Applied physics

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Copyright (c) 2022 Mohamed N. Abdul Kadir, Yasir M. Y. Ameen, Harith Al-Badrani

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